my ghetto $100 turbo build :) - Cisco's Micra Files

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	my ghetto $100 turbo build :)	Mon 21 Nov 2011 10:04:45 AM
	and i.ve already spent £40 of it lol
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 21 Nov 2011 10:05:37 AM
	so the rest of the build will have to be very DIY :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 21 Nov 2011 10:07:06 AM
	its a wee T15 from an astra 1.7 TD
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woohoomobile » CMF Member Melbourne Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 21 Nov 2011 12:16:43 PM
	to be intercooled? or just low boost?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 21 Nov 2011 05:17:31 PM
	woohoomobile WROTE: "to be intercooled? or just low boost?" non I/C woohoomobile, and around 5 psi i guess, with a C/R of 10.5:1, the 3 kg flywheel and QG injectors. the goal is to match the acceleration of an SR20 K11 between 2k and 6K rpm, with a stock ecu (and to try it out on my misses,s 1.0 too :) )

Rudy » CMF Member Hunter Valley mob 0400767960 Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 01 Dec 2011 08:32:01 PM
	keen to hear updates frank

Doom » CMF Member Adelaide Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 01 Dec 2011 11:12:04 PM
	When it's finished il give you $200 for it :-)

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 01 Dec 2011 11:32:32 PM
	Rudy WROTE: "keen to hear updates frank" we tested it out on the 11.5:1 c/r engine (very very gingerly) very loud chatter ! http://www.youtube.com/user/aelknarf?feature=mhee and it pulled well for such a low rpm and spark retard :) the drain into the crankcase breather will only work on a topmout turbo, it flooded with oil and i had to fit a sump spout and the 10.5:1 engine is nearly ready to rock :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 01 Dec 2011 11:36:20 PM
	Doom WROTE: "When it's finished il give you $200 for it :-)" $200 + labour maybe doom :)

Tyrie » CMF Member Canberra Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 07:22:00 AM
	frank2 WROTE: "and i.ve already spent £40 of it lol" so you've got ~$39 to complete the build... good luck!

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 07:43:12 AM
	Tyrie WROTE: so you've got ~$39 to complete the build... good luck!" spent £45 now lol (pipes from our local asian scrapyard) and i have to include the £20 QG injectors and CGA rail really, so even a boost gauge would break the budget ! (gonna have to run without one) gotta select the right strength of piggyback actuator spring now, for the desired 5 psi
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RTK » CMF Member Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 11:08:34 AM
	Just flog a boost gauge haha :) Coming along nicely though frank

Tyrie » CMF Member Canberra Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 01:35:43 PM
	frank2 WROTE: " Tyrie WROTE: so you've got ~$39 to complete the build... good luck!" spent £45 now lol (pipes from our local asian scrapyard) and i have to include the £20 QG injectors and CG rail really, so even a boost gauge would break the budget ! (gonna have to run without one) gotta select the right strength of piggyback actuator spring now, for the desired 5 psi" lol well according to xe.com you have 30cents left in your budget

RTK » CMF Member Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 02:39:03 PM
	Tyrie WROTE: lol well according to xe.com you have 30cents left in your budget" haha

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 06:44:54 PM
	Tyrie WROTE: lol well according to xe.com you have 30cents left in your budget" is that 30 cents $ US ? :P

Rudy » CMF Member Hunter Valley mob 0400767960 Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 02 Dec 2011 09:41:01 PM
	hahaha, hands up anyone who was ever able to stick to budget, love this diy backyard engineering, signing up for a welding course in the new year, you'r an inspiration frank... ...Rudy

ToToL » CMF Member Nouméa New Caledonia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 05 Dec 2011 10:48:07 AM
	I wanna try this way!i don't understand the spring+wastegate,the wastegate open before 5 psi without the spring?or beyond? do you think the i/c isn't worth it in this set-up?let's try a motorcycle radiator lol.

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 07 Dec 2011 05:50:08 AM
	ToToL WROTE: i don't understand the spring+wastegate,the wastegate open before 5 psi without the spring?or beyond? " thanks rudy :) the spring inside the actuator pushes the rod totol, and the extra spring pulls against that inner spring so that reduces the pressure holding the wastegate shut (and reduces the boost) i,ve had to block the boost control pipe too, to reduce the boost even lower (i,m currently running @ about 1 psi lol) http://tinypic.com/player.php?v=2cnb7eo&s=5 gotta try some bigger injectors next :) tho this maf rubber collar/reducer increases fueling somewhat
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 07 Dec 2011 06:03:14 AM
	and its just a little chinese dc mma inverter stick welder rudy, £100 well spent
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 07 Dec 2011 07:31:20 PM
	ok........... we,ve gone over budget and bought a cone filter and boost gauge (thanks shaggy), should,ve titled this "£100 ghetto turbo build" doh currently running with an SR t/b and a cut-off GA16 maf pre turbo, and its pulling very very strongly :D
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Lodo75 » CMF Member rotterdam Netherlands Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 07 Dec 2011 11:39:43 PM
	Hahahaha that balloon!!! Epic! Love the backyard tuning! Keep up the good work! (would love to see it on a dyno for result…) greetz

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Sun 11 Dec 2011 03:01:44 AM
	Lodo75 WROTE: "Hahahaha that balloon!!! Epic! Love the backyard tuning! Keep up the good work! (would love to see it on a dyno for result…) greetz " my timeslips will be more telling lodo, i have lost faith in the accuracy/legitamacy of dyno,s tbh been tinkering with some different bosch topfeed injectors 1.0/1.4 CGA blue ones are the 164cc 0280155942 1.5/1.8 QG red ones are the 211cc 0280155940 2.0 SR (coilpack 00 - 02) grey ones are the 292cc 0280155798 and the SR20 ones are giving some nice a/f/r,s :) here,s the gauge showing the stock ecu trying to closeloop @ idle (a tad lean if anything) http://www.youtube.com/watch?v=PNLRW9PY_pQ&feature=player_profilepage

RTK » CMF Member Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Sun 11 Dec 2011 02:11:21 PM
	Missing a bolt on your rocker cover frank?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 13 Dec 2011 05:45:12 AM
	the baloon proved to be very inaccurate lol, its been boosting to 20 psi + :o and the actuator has proved to be a vacuum type ! (ecu controlled apparently) so we,ve fitted a softer spring inside the actuator for the time being http://www.youtube.com/watch?v=h5OrAb88b9c&feature=player_profilepage that little clutch is holding up well eh ! wheelspin in 1st and 2nd on the damp road
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Dec 2011 07:26:01 AM
	well it lasted a week lol :D (and drank £50 of petrol !) all 4 ringlands let go together @ about 25psi, rings and bores still fine tho gotta give credit to the awesome det resistance to these CG,s and the resilience of the 2 x secondhand stock head gaskets and 175mm hybrid clutch and little type 41 g/box
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Dec 2011 07:28:56 AM
	the clutch did,nt even break out into a sweat :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Dec 2011 07:30:58 AM
	and i found out why cyl #1 had no compression from day 1 too !
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 19 Dec 2011 07:32:20 PM
	we,ve got rid of that damn leanout/closed looping in 4th and 5th gear now (took the connecting screw from the speedo head to the ecu) so we,ve got fuel enrichment @wot in all 5 gears at last :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 19 Dec 2011 07:42:22 PM
	and we dropped the fuel pressure to nearly 2 bar with the 292cc SR injectors, and the fueling was exactly the same as with the 211cc QG injectors when set to the stock 3 bar (closed looping perfectly @ idle and cruise, and off the scale rich @ wot) so i just need to rig up this oldschool mini vacuum advance mech for a proper rising rate f/p/r
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RBLUV » CMF Member Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 19 Dec 2011 07:45:06 PM
	damn wish you were in aus, you would be doing my turbo conversion! looks good :)

RTK » CMF Member Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 19 Dec 2011 07:52:31 PM
	There goes your $100 turbo conversion haha

Rudy » CMF Member Hunter Valley mob 0400767960 Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 20 Dec 2011 07:06:58 AM
	frank2 WROTE: "and i found out why cyl #1 had no compression from day 1 too !" whats the go with them valves, I ask cause i lost #1 cylinder the other day, its not spark, will test injector 2nite, after that it will have to be compression tested to determine valve damage, I hate it when my car is sick

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 20 Dec 2011 07:23:36 AM
	thanks kyle :) Rudy WROTE: whats the go with them valves, I ask cause i lost #1 cylinder the other day, its not spark, will test injector 2nite, after that it will have to be compression tested to determine valve damage, I hate it when my car is sick" dunno rudy, it had the same divit on the other side of the seat, and 2 divits on the valve seat too. i usually test my compressions down our hill in 3rd gear (my tester wont reach down the plugholes lol) and there were only 3 chugs and a gap :o turning the crankpulley with a socket, and the cam cover removed confirmed cyl #1 had very little compression. i think the injectors batch fire on startup btw

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 20 Dec 2011 07:48:39 AM
	RTK WROTE: "There goes your $100 turbo conversion haha" probs $200 now lol, but a lot of it has gone on R & D really eh. the main objective really is to DIY the build and to avoid a costly remap or standalone ecu. i had fitted a 3mm pipe to induce a manifold leak so that the maf was only sensing 1/2 the air entering the engine @ idle (and fueling it to suit) and as the throttle was opened the leak/vacuum diminished and the fueling increased to suit. it worked ok but was pretty crude tbh, but that austin mini vacuum mech has a pull of about 5kg, so when coupled to the stock fuel reg, we should be able to double the fuel pressure to 3.5 bar as soon as that boost gauge hits positive pressure

k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 21 Dec 2011 02:42:29 PM
	Have you got more info on how the mini vacuum will work, I understand that it'l increase fuel pressure under boost, presumably by exagerating the mani pressure when positive/under boost, but not sure how it fits on to the fpr in order to work. (from googling it looks like it advances the timing in a mini.) My plan to try first was a cheap 1:1 fpr, oversized injectors, and a pipe bypassing the throttle body to increase air. Just sounds a little too crude. But keeping economy and mpg at low revs is pretty important to my build. Also, when are you going to be back up and running? :)

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 21 Dec 2011 08:51:58 PM
	aye, the mini vacuum mech retards the timing as you hit the throttle and lose the intake vacuum eh matt (and twists/rotates the dizzy baseplate) so i need to cut a slit down the CGA f/p/r and fit a rod under the spring, so the mech will pull upwards against the spring @ low throttle. my gauge reads 20 inches @ cruise (about 1/2 bar vacuum i believe) so i need at least 1/2 the fuel pressure for those 2 x bigger SR injectors eh. a proper rising rate f/p/r would be ideal (4 or 6: 1 ratio) but experimenting is all part of the fun tho eh :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 21 Dec 2011 09:19:34 PM
	uk_facelift WROTE: Also, when are you going to be back up and running? :) " might be a few day now lol, we,ve aquired a garrett GT15 (the other one is a mitsubishi equivalent)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 26 Dec 2011 07:28:26 AM
	we welded the fillet piece on last this time, so that the inside of the mani could be built up with weld, and shaped for a better flow (where the honda flange and stump joins the cut-off CGA mani) new makita die grinder FTW lol :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 26 Dec 2011 07:36:13 AM
	i could,nt open the wastegate without the help of pliers, and the styrup pump showed 20psi as it opened ! a bit less preload and an extra spring over the shaft has brought that down to 10psi now :) and the SR20 injectors have behaved very well over this last week (same mpg, open and closed looping as it should etc)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 27 Dec 2011 08:04:55 AM
	we ported the wastegate etc today, and cleaned up the roughcast valve seat (boostleak FTL eh :))
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 27 Dec 2011 08:06:07 AM
	and did some polishin :)
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k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Wed 28 Dec 2011 02:14:57 PM
	Looking good frank :) Thanks for the illustration about the mini vacuum, think I understand what your doing now, still seems a little excessive, any thought's about a turbo diesel boost compensator(if thats even possible)?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 29 Dec 2011 05:46:33 AM
	uk_facelift WROTE: "Looking good frank :) Thanks for the illustration about the mini vacuum, think I understand what your doing now, still seems a little excessive, any thought's about a turbo diesel boost compensator(if thats even possible)?" if you mean the vacuum controlled actuator matt ? some diesels use the brake vacuum pump and reservoir to control the boost (via the ecu) so you only have to fit the pressure controlled actuator instead eh (the rod pushes out instead of pulling in) and reverse the arm too eh :) fitted a spare oil pressure switch to the head oil gallery today, oil light goes out in miliseconds as usual (there goes another myth :d )
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k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 30 Dec 2011 07:19:46 AM
	frank2 WROTE: " if you mean the vacuum controlled actuator matt ? some diesels use the brake vacuum pump and reservoir to control the boost (via the ecu) so you only have to fit the pressure controlled actuator instead eh (the rod pushes out instead of pulling in) and reverse the arm too eh :) " No I don't think that's what I meant, I was reading up on what people do when turboing a n/a diesel, and instead of using an aftermarket rising rate FPR, or that brake pump system thingy that i think is on modern TDIs, they fit a 'boost compensator', which adjusts the fuel pressure to suit the boost. Seems like an elaborately designed and more boost suitable FPR. http://www.toyotadiesel.com/phpBB2/files/detail_1.jpg Although on second thoughts diesels wouldn't be able to use a regular fpr, so it could be nonsense lol.

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 30 Dec 2011 07:47:49 AM
	i think thats for the old (pre-commonrail) injector pump matt ? so that it delivers extra fuel during boost (rather than solely via the throttle cable eh)

k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Sat 31 Dec 2011 09:26:13 AM
	frank2 WROTE: "i think thats for the old (pre-commonrail) injector pump matt ? so that it delivers extra fuel during boost (rather than solely via the throttle cable eh)" Ah ok, so it's nothing to do with an end rail fpr, can skip past that idea then eh, be more hassle than it worth. How's the mini vacuum device coming along, you onto a winner?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Sun 01 Jan 2012 05:00:55 AM
	uk_facelift WROTE: How's the mini vacuum device coming along, you onto a winner? " not yet matt, we,ve welded the dump/recirc valve from the honda manifold on today tho :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 03 Jan 2012 07:53:04 AM
	10.5:1 engine refitted now :)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 03 Jan 2012 07:55:24 AM
	minimal clearance on the alternator (for extra clearance around the rad)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 06 Jan 2012 08:04:27 AM
	running a very stable 7psi atm, while i refine the fuel reg :)
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asdame » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 06 Jan 2012 10:35:45 AM
	getting there

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Sat 07 Jan 2012 05:38:06 AM
	asdame WROTE: "getting there" aye paul :) the RRFPR is showing good promise :) here,s the pressure difference when i pull the vacuum pipe off http://tinypic.com/player.php?v=2ue5it4&s=5
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 09 Jan 2012 06:10:37 AM
	got the fueling as close as i can now with this rrprv :) we,ve got a helper spring on the diaphram rod (so about 2 x stronger push now) and the larger/softer spring gives the 20psi base pressure @ low throttle (while the rod is retracted, till about 1/3 a bar of inlet vacuum) its set so that above the 1/3 a bar vacuum the rod is pressing down on the stock diaphram and delivering 45psi of fuel pressure, and in theory any positive pressure/boost is increasing that further still
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 10 Jan 2012 08:21:39 AM
	tried to vid a rolling start 1st gear from 2k, but switched the camera on a tad late tho :( (but if you pause the vid and wind back to 0, it shows 2k and zero boost) http://www.youtube.com/watch?v=oBlRV355RgM&feature=youtu.be was trying to show the response, and steady boost level (the red needle shoots to the same spot inbetween 0 and 10psi whenever full throttled eh) well, its nearer 1/2 throttle tbh, (had to fit a bumpstop) because its still leaning out @ wot, even with 292cc injectors and 45psi fuel pressure ! and its a thirsty bastard when booted too lol
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k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 12 Jan 2012 04:47:27 AM
	Are you still using the stock fuel pump?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 12 Jan 2012 05:14:24 AM
	uk_facelift WROTE: "Are you still using the stock fuel pump?" yes matt, it did cross my mind that more flow would help, and i,ve never changed a fuel filter either lol. i,ll fit the ebay fuel reg back on and try a flowtest asap, but i want to try the 260/10mm inlet cam first :)

k11_facelift » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 13 Jan 2012 02:08:59 AM
	I'd personally sort the fueling out first, then fit the cam, cams wildly effect the powerband on turbos don't they(?) Don't want to find out you'd have been better on stock cams :o Suppose it doesn't take long to swap em out for you. I wonder what a 1.0 exhaust cam would be like.

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Fri 13 Jan 2012 02:28:30 AM
	too late matt, the cam is in lol :) i tested the flow and it seems fine http://www.youtube.com/watch?v=4a0UycSTlEE&feature=youtu.be it still flowed as mad when i ragged it in 1st and 2nd a couple of times (the can was full by then lol :o) our pumps flow about 90L/hr i think, which should be more than enough imo. and i doubt if i,m sacrificing much in the way of hp with only 1/2 throttle tbh (would be different for an N/A screamer eh)
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 16 Jan 2012 07:47:39 PM
	got the rising rate fuel reg working spot-on now :) 30 psi rising to 60 psi under boost, which is allowing full throttle at last ! and the 260/10mm inlet cam is definite win http://www.youtube.com/watch?v=VZdMlb6y1Hs&feature=youtu.be so..........the conclusion is that you CAN ghetto build a CG+T, and have SR20 grunt from 2k rpm, and for a very low cost if you diy. gonna go back to a more insurance friendly N/A soon (till 1/4 mile season), and start the next project

asdame » CMF Member United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 16 Jan 2012 11:29:43 PM
	fab work

ToToL » CMF Member Nouméa New Caledonia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 20 Feb 2012 03:04:05 PM
	Good job, and i was wondering for a what turbos on my k11 and my pajero...seems that the pajero's turbo will go on the K11!did you use a td04?what are the specs? Do you think an ebay RRFPR should be ok?i haven't the same scrapyard as yours lol!Minis (and all "good" or "sport"cars) good to scrap there usually pass by saturday night fever and finish on sunday morning fire lol.The week-end's thieves sad stories!

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 20 Feb 2012 07:00:38 PM
	95% of reg,s listed as rising rate are really fixed rate ones totol, that ebay RR one in the vid shows a differential of only about 7psi between idle and wot (so i only used it in the fuel feed line to test the ghetto one out). you need at least 2:1 differential in fuel pressure to counter the over-rich idle/low throttle, and the leaning out @ wot. which means you need a RRFPR with about 4:1 to 6:1 ratio (depending on what boost you,re running) we,ve been running this setup this week, with 1.3 pistons SR20 t/b and 2 headgaskets, and more boost :D these CG,s are VERY strong. i would,nt use any bigger than a GT15 personally, here,s how small the exhaust gasses are confined to tho :O smaller than my little waving pinky finger !
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 05 Mar 2012 12:19:19 AM
	did some hooning at work this week :) http://tinypic.com/player.php?v=wkfprl&s=5 and fitted a knock sensor to the (apparently weaker) cyl # 3 gonna fit a micraphone to it too, and then see where the det kicks in, and probably try a ghetto water injection to eliminate it its had a proper ragging so far, but because the little GT15 basically turns into a heatpump @ anything over 5k-ish (not helped by the lack of intercooler) i,ve only really used WOT @ 2k to 5k tbh i guess i could gain another 30hp @ full chat, but with this 260/10 inlet cam retarded about 20deg, i would probably lose some of this daily driver midrange punch
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ToToL » CMF Member Nouméa New Caledonia Member since: Posts:	Re: my ghetto $100 turbo build :)	Mon 05 Mar 2012 01:53:58 PM
	Is it the turbine feed side?you reduce the diameter ?? so you had too much lag to come to this method!i'll forget the T20 idea (pajero turbo size)!

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Tue 13 Mar 2012 01:26:39 AM
	ToToL WROTE: "Is it the turbine feed side?you reduce the diameter ?? so you had too much lag to come to this method!i'll forget the T20 idea (pajero turbo size)!" no, all stock mate we pressed my old (volvo iirc) 5th injector back into service today, mounted into the front face of the mani for even distribution, off the scale rich @ wot now, even with full boost :) gonna re-try the 211cc QG injectors next, for a comparison
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Mickb » CMF Member Perth Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 07:01:24 AM
	Had a set of cams analysed, thoughts Frank?
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 07:26:09 AM
	imperial measurements eh mick ! the duration is often classed from 50" thou lift i believe, so 268 deg exh, and 254 deg inlet ? and .4" lift (10mm)

Mickb » CMF Member Perth Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 07:46:26 AM
	Yes I thought you would like that :) I have read that is the 'standard' of sorts. Which seems to be an american/uk thing. I have had a few sets of cams for micra's before. Tomei 256 - over-rated for the price Mulholland 272 - awesome cam on stock intake and these ones (which are 'said' to be 296/280, which is taken from peak open, not at full lift) - basically could not get it to run stable at all on stock ignition/fuelling, that was a while back, I will test it out again sometime. Attached is a comparo of stock and a/m exh cams
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frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 08:11:01 AM
	jeeez, those are monster lobes mick ! the valves are held fully open for ages eh. it just goes to show how there are "durations and durations" they have included the 16" thou valvelash in the readings which adds to the confusion eh. some cam companies would class them as 270 deg inl and 286 deg exh @1mm lift and zero lash, and many measure from 0 lift and 0 lash (which would make them close to 400 deg lol)

Mickb » CMF Member Perth Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 08:15:39 AM
	I suspect that it is all about companies wanting to state large numbers on their products.. Back to your car, tracking this engine sometime soon?

frank2 » CMF Member birmingham United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 08:29:59 AM
	april 1st is the next 1/4 mile mate, so i,ve been fitting the bike communication microphone to the knock sensor today (gonna monitor the milivolts and sound while i induce some DET to find the limits) and the 5th injector had allowed me to drop the fuelreg pressure (which has given back the bike-like throttle responce, and 2 k spool-up :) ) page 2 continues here http://www.micra.com.au/community/message.php?messageid=75745
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Lodo75 » CMF Member rotterdam Netherlands Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 08:37:31 AM
	Haha your creativity has no boundaries frank!! Really awesome diy solutions. Love following your posts

SSUK » CMF Member London United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 06:50:16 PM
	Those cams look familiar Mick ;) 296deg Inlet
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SSUK » CMF Member London United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 06:50:44 PM
	280deg Exhaust
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Mickb » CMF Member Perth Australia Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 07:51:00 PM
	Know any history of them? Pmd

SSUK » CMF Member London United Kingdom Member since: Posts:	Re: my ghetto $100 turbo build :)	Thu 15 Mar 2012 09:43:58 PM
	None what so ever I'm afraid. I am currently in the process of running simulations to see what the limits are for camshaft profiles on the CG cylinder heads. We are somewhat limited by the 30mm follower sizes on what can be achieved using available off the shelf valve springs. The standard valve train is prone to the risk of valve bounce and hits an early limit on duration and lift due to having a shim over bucket design. Larger followers aren't much of an option due to the head configuration, so it's a challenge. I guess someone must have made them work though but to what extent I cannot say. A 296/280 combination will be pretty hard core in terms of rpm and I have no idea what the CG13 cranks are good for either for that matter to support 'sustained' high rpm use.