motorbike throttlebodys on a car?
Discussion
Motorcycles flow gas at different rate than cars, therefore motorcycle fuel injection is hard to get working on a car engine. Bikes run at different flow rates, and are setup for power at higher revs etc
Its the "done thing" in the kit car world if you want to get more power .... and also makes it potentially easier to map to a custom ECU.
It'll be less economic, and less refined, but more sporty. But Bike TB's can normally be picked up a bit cheaper.
Its the "done thing" in the kit car world if you want to get more power .... and also makes it potentially easier to map to a custom ECU.
It'll be less economic, and less refined, but more sporty. But Bike TB's can normally be picked up a bit cheaper.
K1 Gsxr 1000s are good and common use, because you can sesperate them.
Hayabusa are used too, as are many 4 cylinder big sports bike are ups.
Gsxr 750/1000s are used often on zetecs, (which I have some limited knowledge of.)
Seen as a cheaper option compared to jenveys/proper throttle bodies etc.
Always a lot more expensive to convert that you'd initially think, particularly if moving from carbs.
Hayabusa are used too, as are many 4 cylinder big sports bike are ups.
Gsxr 750/1000s are used often on zetecs, (which I have some limited knowledge of.)
Seen as a cheaper option compared to jenveys/proper throttle bodies etc.
Always a lot more expensive to convert that you'd initially think, particularly if moving from carbs.
4G63T said:
a while ago I read on a different forum that putting motorbike throttle bodies on to a car engine is quite a good mod and you get more power out of the engine.
any truth behind this? and what would it do?
In general, yes. any truth behind this? and what would it do?
Individual throttle bodies flow better than a single point carb or injector I to a multi branch manifold. Think of how side draft webers are set up. No different. Throttle response is massively improved as well. But sizing is critical so as not to restrict the car engine inlets. 40 to 45mm are usually the ideal for a 4 cylinder 2 litre 16 valve engin3 revving to 7k but going too big can hurt throttle response.
GSXR carbs have been put on many a 205 - normally with a megasquirt DIY ECU.
You'll get a smoother delivery of fuel/ air as you'll have one per cylinder - more power throughout the rev range with little compromise.
Quite a cheap alternative to proper TB's, considerably.
My Jenveys, ECU and mapping came to over 2k!
Worth it for the noise alone!
You'll get a smoother delivery of fuel/ air as you'll have one per cylinder - more power throughout the rev range with little compromise.
Quite a cheap alternative to proper TB's, considerably.
My Jenveys, ECU and mapping came to over 2k!
Worth it for the noise alone!
I take it that your 4G63 lump is not an Evo unit then?
Its close in concept to the Zetec, but with a few more internal moving parts like the balance shaft - so they should be good for 180-185bhp.
Getting an inlet manifold to suit is going to be your problem though. It wont be an off the shelf solution.
Its close in concept to the Zetec, but with a few more internal moving parts like the balance shaft - so they should be good for 180-185bhp.
Getting an inlet manifold to suit is going to be your problem though. It wont be an off the shelf solution.
Hol said:
I take it that your 4G63 lump is not an Evo unit then?
I actually don't have a 4G63T engine in my galant, I was so close to dropping one in, but thought about it and it would be a lot easier and a lot less time consuming to just get a new car, I was just asking as if the fuel injection stuff buggers up on my car, it would be an absolute ball ache to source parts, basically just getting bits off a spare or repair/breaking car.but its good to know, as i might actually keep this car as its only a shed (well, i paid hardly anything for it, but it goes, handles and stops great and with only 27k on the clock its in pretty good nick aswell) and keep it till i cannot fix it myself anymore, and just use it as a tip run/hauling/towing/general workhorse.
I put a set of Triumph 955 Daytona TB's on my Mk3 Supra about 6 years ago, they didn't make much difference in power and the fuel economy was crap but the throttle response and noise was amazing it was a shame the engine decided to drop its oil. I've got pictures of the set up and I've still got the throttle bodies back home in the UK.
Bike throttle bodies are simply a cheaper alternative to fitting proper car throttle bodies (e.g. those made by Jenvey), but require more fabrication work for the manifolds. Fitting individual throttle bodies will nearly always require an aftermarket ECU to be installed and mapped to make the engine run properly and actually see any potential power gains.
Tezzpip said:
I put a set of Triumph 955 Daytona TB's on my Mk3 Supra about 6 years ago,
Surely you would need two sets of 955i TB's for a 6 cylinder engine?
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