using carbs as ITB's

tnt2door · Post by **tnt2door** » Sun Nov 29, 2015 10:30 pm

Saw these carb in the garage and thought, could a person use these as ITB's?

Has anyone ever tried it? These are 32mm, a tad small I think, but I heard 42mm from the RSI is too big unless one uses a huge cam on an 8 valve. Maybe these would be a good option if I could get them to work.
Thanks

chucker02 · Post by **chucker02** » Sun Nov 29, 2015 10:38 pm

You are stuck with the same problem, fitting a TPS to them and where will the injectors sit? Will have to make a fuel rail for it and fabricate a manifold and make your throttle cable work.

tnt2door · Post by **tnt2door** » Sun Nov 29, 2015 11:11 pm

Use a stock manifold with the injectors against the head. The tps can be located where the balancing screws are or on either side. There are bigger issues like getting the MAP sensor to work if running MP9. Besides all this, if the carbs get sealed, will they work.

chucker02 · Post by **chucker02** » Sun Nov 29, 2015 11:19 pm

So modify a standard manifold? Fabrication of everything will cost the same as rsi throttles. And as you mentioned 32mm is too small

tnt2door · Post by **tnt2door** » Sun Nov 29, 2015 11:37 pm

Yup...if I can manage to get a stock 8v xflow manifold that is.
I have considered rsi throttles, but that sounds too easy

and it's been done.
So if I am reading between the lines...it will probably work? Cool, thanks.

PoLonY · Post by **PoLonY** » Mon Nov 30, 2015 6:21 am

Or just forget the efi part and run them as carbs

Sent from my SM-N900 using Tapatalk

Post by **panic-mechanic** » Mon Nov 30, 2015 6:45 am

Bike carbs. Yes has been used before. Those are a bit small but you do get bigger.
Of course if you have a 1400 it might be perfect.

Torker · Post by **Torker** » Mon Nov 30, 2015 7:18 am

This is the preferred way of modding in the UK, a set of bike carbs on a lightly modified engine, intake is easy to fabricate, just a flange with 4 short pipes to connect the rubber couplers to. You have to make provision for the injectors if you want to go FI or mod an existing FI intake to work.

tnt2door · Post by **tnt2door** » Mon Nov 30, 2015 9:11 am

But tell me they don't look sexy!?

dazza · Post by **dazza** » Mon Nov 30, 2015 10:47 am

panic-mechanic wrote:Bike carbs. Yes has been used before. Those are a bit small but you do get bigger.
Of course if you have a 1400 it might be perfect.

I see the CBR600 carbs are used often accross the pond on the VW's, popular choice

tnt2door · Post by **tnt2door** » Mon Nov 30, 2015 11:40 am

Ja, these are off a cb900

using carbs as ITB's

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