bike throttle bodies to car
Discussion
I've never understood the need to be honest. Motorcycles flow gas at different rate than cars, and therefore motorcycle fuel injection is hard to get working on a car engine.
I suppose you could look for a bike which has half the capacity of your car but twice the revs, that would be a very rough way of working out if they are compatible. Even so, bike fuel injection and carbs aren't magic, they aren't different to car injection and carbs except they are designed to work on bikes, not cars.
Unless someone knows different?
I suppose you could look for a bike which has half the capacity of your car but twice the revs, that would be a very rough way of working out if they are compatible. Even so, bike fuel injection and carbs aren't magic, they aren't different to car injection and carbs except they are designed to work on bikes, not cars.
Unless someone knows different?
They do are popular, not because of bike vs car volumetric efficiencies, but because bike throttle bodies are far cheaper, and easier to come by than car TB's..
Taking it as pure independent throttle bodies, and not just Weber carbs etc, there are very few car's with fuel injection ITBs, in the modern era, i can only think of BMW, even Lamborghini and Ferrari use one per bank systems, so bike TBs are a cheap way of adding ITBs to an engine which will increase very low response by having such a small area under vacuum at closed throttle, and increase ultimate power via the large unrestricted airpath, at the expense of tuned manifolds and runners from single throttled engines with plenums, that will be tuned for low and midrange ram air charging.
It'll be less economic, and less refined, by more sporty.
As for people using bike TBs, i know of quite a few of the 106'ers that do this, and an MX5 owner in the middle of a conversion like this.
Taking it as pure independent throttle bodies, and not just Weber carbs etc, there are very few car's with fuel injection ITBs, in the modern era, i can only think of BMW, even Lamborghini and Ferrari use one per bank systems, so bike TBs are a cheap way of adding ITBs to an engine which will increase very low response by having such a small area under vacuum at closed throttle, and increase ultimate power via the large unrestricted airpath, at the expense of tuned manifolds and runners from single throttled engines with plenums, that will be tuned for low and midrange ram air charging.
It'll be less economic, and less refined, by more sporty.
As for people using bike TBs, i know of quite a few of the 106'ers that do this, and an MX5 owner in the middle of a conversion like this.
Its the "done thing" in the kit car world if you want to get more power from your engine.... and also makes it easier to map to a custom ECU..
These gentlemen will be able to help you... http://www.boggbros.co.uk/ the quality of their work, I hear, is second to none!
These gentlemen will be able to help you... http://www.boggbros.co.uk/ the quality of their work, I hear, is second to none!
bikes run at different flow rates, and are setup for power at higher revs etcI'm putting bike bodies on my 106 rallye at the moment, using the ones off a GSXR1000, and have a chap making me a custom manifold and modified fuel rail and injectors plus billet trumpets for £500. You dont retain the original injectors, i'm using some off a 2ltr 406.
It is a relatively cheap way ( still gonna be £1600ish all in) but i'd get hardly any more power from other setups which would be even more.
If you ask on a relevent ford forum they might suggest someone as i found the guy who's doing mine on a 106 forum!
- try boggbros as i was looking at them before going to someone else
It is a relatively cheap way ( still gonna be £1600ish all in) but i'd get hardly any more power from other setups which would be even more.
If you ask on a relevent ford forum they might suggest someone as i found the guy who's doing mine on a 106 forum!
- try boggbros as i was looking at them before going to someone else
Edited by greenBo**ox on Wednesday 28th October 22:24
Edited by greenBo**ox on Wednesday 28th October 22:25
Definitely go to Bogg brothers near pickering.
They have done loads of these bike carb to car conversions (including on my mates mk1 escort)
Car is amazing now, lots more power, doesnt go out of tune like 40`s do.
Also worth going up there for them to set the engine up on the rolling road and the best thing is that they arent that expensive
They have done loads of these bike carb to car conversions (including on my mates mk1 escort)
Car is amazing now, lots more power, doesnt go out of tune like 40`s do.
Also worth going up there for them to set the engine up on the rolling road and the best thing is that they arent that expensive
I have a set of CBR1100XX ITBs sat in the cupboard at home, awaiting a manifold and vacuum system to be fitted to my Civic.
I only fancied doing it for the sake of tinkering, if I make the same power as stock I will be happy, and without supporting headwork I don't expect I will see much in the way of gains. It looked cheap at first (I paid £130 for the bodies) but once all the supporting hardware is taken into account it soon adds up.
With regards the to the flow characteristics, the only major considerations are bore and length, length you make up to the operating speed of the engine with the custom manifold, and bore sizes go up to about 42mm, enough to flow about 60bhp per cylinder, although I wouldn't want to use them on anything over about 1800cc.
I only fancied doing it for the sake of tinkering, if I make the same power as stock I will be happy, and without supporting headwork I don't expect I will see much in the way of gains. It looked cheap at first (I paid £130 for the bodies) but once all the supporting hardware is taken into account it soon adds up.
With regards the to the flow characteristics, the only major considerations are bore and length, length you make up to the operating speed of the engine with the custom manifold, and bore sizes go up to about 42mm, enough to flow about 60bhp per cylinder, although I wouldn't want to use them on anything over about 1800cc.
TheEnd said:
Taking it as pure independent throttle bodies, and not just Weber carbs etc, there are very few car's with fuel injection ITBs, in the modern era, i can only think of BMW, even Lamborghini and Ferrari use one per bank systems, so bike TBs are a cheap way of adding ITBs to an engine which will increase very low response by having such a small area under vacuum at closed throttle, and increase ultimate power via the large unrestricted airpath, at the expense of tuned manifolds and runners from single throttled engines with plenums, that will be tuned for low and midrange ram air charging.
If you're looking for a source of cheap car ITBs then a couple spring to mind. The Sunny/Pulsar GTiR runs a set (four obviously). In this case if you're fitting them to a 4 cylinder engine I'd be temped to just try and drop the whole GTIR engine in. With fiddling the unit is available in either transverse or longitudinal applications and with either front, rear or four wheel drive. Lots of tuning options exist for the engine and the GTiR lump come with a fair amount of goodies on it from stock.There is a Toyota engine (Japanese and perhaps US market) which used four individual throttle bodies. It wasn't the BEAMS engine but I think it might have had a 20 valve head. Bit fuzzy on this one I'm afraid.
There's always the RB26 if you want six throttle bodies. Mind you you might upset people if you started chopping them up to fit to a 106.
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