ok so i got a set of itbs, i have a cut gsr mani for runners, its all welded up
but i wanna know what kinda itbs these are. . and i'm confused on how/ what to do about the vacuum lines and the like. anyway here are pics:





thanks for your help

 

Those are the 42mm Suzuki GSXR 1000 throttle bodies. From the looks of it, you got them from someone who either built them early, or is still using the homemadeturbo.com setup as a blueprint. A couple of design flaws you're going to have are: unequal runner length, improper velocity stack inside diameter, and vacuum.

Ideally, you would be running the injectors from the stock Suzuki locations, but those have been lost to the JB weld, which means your brake booster vacuum is going to come from just cylinder number one. The vacuum lines teed together from each cylinder are going to the MAP sensor. The line coming off of cylinder number two is for the FPR, and the line coming off of cylinder number three is going to the charcoal canister. At least the stock Suzuki TPS appears to be in tact and it will work fine assuming you obtain proper engine management.

 

ok kool, thanks , yea im gonna be using neptune for engine managment
so what should i do to better this setup ? ( i understand about the wrong placement for the injectors, and i may fix that after i get the car tuned( happening next week)
Jay

 

also is that brake booster coming from just cyl one is that enough vac for brakes ?

thanks kendall

 

Hey man, you don't need to show us a picture of your crotch to get answers. haha.

I think what kendall is trying to say is that the "homemade" itb's have come a ways since whoever made the ones you have there put them together.

I don't know if that vacuum source will provide enough for the booster, can anybody confirm?

 

yea i got them as a present and i'll be getting better ones later

sorry for the crotch shot haha, i wasnt thinking clearly

 

Yes one source is enough.