Bike carbs on a car???

on a 4af? weird :lol: i'd expect it on a 4AG.

Why's that weird? Like I said, the 4A-GE isnt that much better

well the 4ag just seems like it'd benefit from the ITB more than the 4af.

ya thats the first time i've seen it on a 4af

well the 4ag just seems like it'd benefit from the ITB more than the 4af.

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Thats because nobody does it with a 4A-F than a 4A-GE... but seriously, benefits would be same and there.

I've seen it on a 4af before actually, on the net since most of the guys around here with 4af's swap them out.

Flashmn said:

1) yes they work.. its a bitch to set up, as car guys know nothing of them and bike guys cant be bothered

2) no gains compared to racing carbs made for cars.

3) yes on both counts

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Thanks flashmn. I should of guessed you tried it . I've got a guy who know's about bikes who said he'll help me. I'm very keen to try it out.

What would you say are the gains comparing to having the normal carb?
1.Like how many kw?
Also in your pic I see you got a custom exhaust manifold(header, I think your'll call it?) 2.Do you know what diameter it is?
3.What compression is it good to run the 4af at with the bike carbs?
4.Is it wise to shave/skim the head, in order to increase compression?

freakinbox said:

I've seen it on a 4af before actually, on the net since most of the guys around here with 4af's swap them out.

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Got any links???

I didn't save them lol, probably on cardomain

Main advantage for ITBs I would say:

1)Response
2)Smoothnes
3)Power
4)Induction symphony which gives you eargasms!

and maybe 5)Much more room in the engine bay, for lazy home mechanics like me

Anyway if your engine is stock don't bother, but if its built then any engine can benefit from it, G or F.

project trueno said:

Main advantage for ITBs I would say:

1)Response
2)Smoothnes
3)Power
4)Induction symphony which gives you eargasms!

and maybe 5)Much more room in the engine bay, for lazy home mechanics like me

Anyway if your engine is stock don't bother, but if its built then any engine can benefit from it, G or F.

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You say stock, as in what way. At the moment I've only got a 4-1 exhaust branch(header) and a freeflow exhaust system. But possible head work for the future..

What would you say are the gains comparing to having the normal carb?
1.Like how many kw?
Also in your pic I see you got a custom exhaust manifold(header, I think your'll call it?) 2.Do you know what diameter it is?
3.What compression is it good to run the 4af at with the bike carbs?
4.Is it wise to shave/skim the head, in order to increase compression?

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Gains... well.. if they're adjusted they'll give better response, but so will webers.
Dunno about the KW
The header is hmm, well I'd have to take measurements, but it ends up as a 2"
yeah why not, adding compression is good. But really the head is a bit restrictive.

From my experience I'd go with webers/dellortos

I was going to do the same thing but decided to go EFI since I was going to use a turbo... I still have the carbs if your interested.

PM me for details if you want

AE92 SPORT said:

You say stock, as in what way. At the moment I've only got a 4-1 exhaust branch(header) and a freeflow exhaust system. But possible head work for the future..

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With those bolt-ons, don't bother.

Basically if your build (If EFI) is at a point where standalone management is not needed, don't bother fiddling with the quad throttles.

If carb'd, I'd at least go for cams + headwork and higher CR first.

Flashmn said:

Gains... well.. if they're adjusted they'll give better response, but so will webers.
Dunno about the KW
The header is hmm, well I'd have to take measurements, but it ends up as a 2"
yeah why not, adding compression is good. But really the head is a bit restrictive.

From my experience I'd go with webers/dellortos

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So you say Webers/dellortos, ok, do you know which would work best, 32,36, 38 Weber??? Sorry for asking, if it's a stooopid question, but my knowledge is little and I'm still learning. And 2inch, damn that's big for a header? That's the size of my exhaust.

Flashmn said:

The header is hmm, well I'd have to take measurements, but it ends up as a 2"

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I understood that as the 4 pipes go into a 2 inch which is the size of the exhaust

4-2-1 and it ends in 2"

As for webers, I had DCOE's with 33mm chokes. you could go with 34-36mm depending on what you want.

my GF's moped runs a dellorto carb and ive seen some of their more advanced carbs, very well designed things.

the ebay header i have is pretty much the same header you see on any xA-Fx corolla engine, 1 5/8ths runners i think with a 2 or 2.25 inch middle section to the cat.