EFI to carb

hi guys.. just want to ask if anybody did a EFI to carb convertion to their micras?

coz i was planning to go old school and convert the cg10de throttlebody and the whole intake manifold into a twin side carby.. the the problem is im having trouble looking for a dizzy with coil pack to replace my efi dizzy..

does anybody know the dizzy that can replace the efi one?


thnx in advance..

aki

aki

k6pfs has some mint looking cbr carbs and manifold for sale (i,ll post a link when the poxy server works !).
a post 2000 k11 coilpack conversion would be pretty pointless tho, imo
edit http://www.micra.org.uk/showthread.php?t=26611

frank

frank

i already have the manifold and the carbs sir.. my only prob is the dizzy.. coz i want to convert it into full carby setup without the use of the computer box.

aki

aki

why not run the carbs with the stock (k11) ignition system ?

frank

that was my plan along with my mechanic.. but one auto group in our place said that if you convert into carby, the ignition system should be converted too since it is still computer controlled. and they also said coil type are easier to upgrade since MSDs can be added.

are they right sir?

hoping for more ideas and suggestions..

thnx


aki

im part of the way there..
Probably going for an ignition-only aftermarket setup..

looking good mickey ;-)

aki

my ignition works fine on gas (lpg), with the fuelpump fuse removed.
you just need a low pressure fuelpump (for the carbs)

frank

Can i ask why would anyone do this. Is there a upside to it. I thought the bigger injectors and the ga15 TB would be better. Prob cheaper as well. Or are they trying to go backwards with the fuel economy. I have no idea why you would do it.

yep carbs are very sensitive to fuel pressure..
different carbs need diff pressure, ie if they are off a bike
they may have been running off trickle feed (fuel tank above carb)
or need somewhere between 3-9psi, far cry from efi fuel pressures.

Ok so is there a performance gain to doing it?

look at it this way, ga15/tb and injectors will only get you so far, or a tb tapped with an extra injector will only get ur fueling so far,
custom fuel rail with sr/rb injectors, quad throttle bodies, and full management is an expensive step for a NA. So I thought i would give this a shot, I love the sound of an angry carby too =) which is a plus.. A lot of the 150/160ps March race cars of old ran fcr slide throttle carby setup's so it cant be all bad mate.

Fuck it, its something different too.

It Depends what you want to do i guess, the setup that Mickeybb is using will definately gain power, because he is doing alot of engine work aswell, if you want performance forget about fuel economy...

Yeh love the Quads sound, its going to be a beast when you are finished!!

yeh hopefully
decided not to go forged pistons/rods.. at least in the initial build
just everything else, and then later il smash them in there

the other upside to the fcr setup is having such a short inlet tract too.. that and the fact that ONE of the four butterfly's is the size of the stock cg throttle body.... giving a shit load more flow then any sr20/ca/ga throttle body.. all that = almost instant response.. and at the end of the day a n/a racer is all about getting as much air in and out of the car and instant response!

Nice work. Thanks for the informative posts. Cant say i have any problems with any of it. Looks good and if it gets you more power go for gold i say.

the only downside with those slide type carbs, is that you get no acceleration enrichment, whereas with the honda cbr variable venturi type (rubber diaphram) you do