bike carbs on motor

craarc

craarc

craarc

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Joined
2 Feb 2012
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1,992
anyone using bike carbs on there motors and any good ?

was reading a thread on a car forum and some guys on there were using them as throttle bodies
 
Not seen it on the road for ages but XR2's with bike carbs used to sound Awesome & go pretty well an all if in a kit car.
 
Drexel on here runs them on a 2ltr 8v mk2 golf and I have a set ready go go on my golf.

Supposed to perform as good as proper Weber carbs at a fraction of the cost of you can fabricate your own manifold.
 
yer ive heard the response is really quick using them and reletivly cheap also, gonna look into a bit of work this year i think.
 
ManLoveRulesOK said:
Drexel on here runs them on a 2ltr 8v mk2 golf and I have a set ready go go on my golf.

Supposed to perform as good as proper Weber carbs at a fraction of the cost of you can fabricate your own manifold.
Click to expand...
just a thought, you could chop a manifold from the scrappy and run longer silicone hoses if the spacings are different, plus point more torque from running longer manifold at the cost of top end power
 
Seen a few Honda folk do it over the years, usually turns out with the same result as turbo'ing if you dont do it properly and at great expense it will cause a lot headache
 
had bike carbs on my 2 litre zetec that was in my xr2, great response, stay in tune, better fuel econemy and the same if not more power than a set of webbers, got 138 bhp from a standard zetec.
 
red eye said:
just a thought, you could chop a manifold from the scrappy and run longer silicone hoses if the spacings are different, plus point more torque from running longer manifold at the cost of top end power
Click to expand...

Denends how the original manifold and the bike carbs are spaced, plus my nice polished stainless manifold looks nice than a cast one.
 
craarc said:
anyone using bike carbs on there motors and any good ?

was reading a thread on a car forum and some guys on there were using them as throttle bodies
Click to expand...

They were probably using bike throttle bodies as throttle bodies - would be a bit pointless using carbs ;)

Lots of kit cars use bike carbs and throttle bodies. The carbs are a much cheaper alternative to DCOEs etc.
 
robj20 said:
not if you get decent hose
Click to expand...

Any silicone hose of normal thickness (i.e. the stuff used for coolant and boost pipes) will collapse if you try to pull vacuum through any significant length of it. It only works on most installations because the carb/TB and the manifold are right next to each other so only a few mm of the hose is actually exposed to vacuum.

Silicone hose is also not fuel resistant unless you get the expensive fluoro-lined stuff, and it's also quite slippery so securely fastening it to the carbs and manifold can be problematic; lots of people has had silicone pipes work loose and fall off in these conversions so it's far from ideal. Much better to modify/fabricate the manifold so it can take the original rubber couplings which were used on the bike.
 
yer prob throttle bodies from a bike on the car i guess just wondering how to go about it may go back on the car forum and ask them which ones they were using etc and how it was set up
 
Couple of pics:-

Throttbodies.jpg

throttlebodies.jpg

enginein2.jpg

100_2813.jpg
 
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