Turbo + ITB's on a miata.
#41
My only experience with them is on a RB26 so it relates a bit I guess. I'll explain it this way. Large single throttle body = BIG hp. Guys running big singles (think T88, T51R etc) on the RB go with a single large throttle body to aide in HP/ max flow. Most of the time these are dyno queens or drag cars.
Now, if you stick with twin turbos, say GT2860's like I had built.. and you want better throttle response you keep the ITB's. You loose a bit of peak horsepower but your tip-in response is lightyears better and with two smaller quick spooling turbos it makes the car much more fun to drive. The car still made 530awhp with ITB's so I wasn't complaining.
Now, if you stick with twin turbos, say GT2860's like I had built.. and you want better throttle response you keep the ITB's. You loose a bit of peak horsepower but your tip-in response is lightyears better and with two smaller quick spooling turbos it makes the car much more fun to drive. The car still made 530awhp with ITB's so I wasn't complaining.
#42
Elite Member
Thread Starter
iTrader: (17)
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,799
Total Cats: 1
so we know that Turbo ITB combo is not unheard of, and that it helps throttle response but it hurts flow with a really high HP setup.......
question is....is it worth it.
should one go with a ITB's w/ a plenum or just say my idea/thought blows and one should go with a bad as Honda manifold and make it fit. possibly putting a bigger throttle body on.
question is....is it worth it.
should one go with a ITB's w/ a plenum or just say my idea/thought blows and one should go with a bad as Honda manifold and make it fit. possibly putting a bigger throttle body on.
#53
Also, those big turbo cars? Willing to bet those are mainly drag cars, where throttle is either on or off most of the time. Throttle arrangement wouldn't matter there. Might be wrong, but that's the feeling i get.
EDIT: You just put up pictures, nice. It's not two in one, those are just different construction methods.
#56
Elite Member
Thread Starter
iTrader: (17)
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,799
Total Cats: 1
if it will be easier for me to go with 2 constructed together ill do that.
i just looked on egay. there is a set of GSXR 600 ITB's going for 110 bucks! most of them all range between 110 to 200 price range.
i just looked on egay. there is a set of GSXR 600 ITB's going for 110 bucks! most of them all range between 110 to 200 price range.
#58
Elite Member
Thread Starter
iTrader: (17)
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,799
Total Cats: 1
the ITB's wont get installed till after my car is back up and running and dynotuned. after that the ITB's will go on and it will be back to the dyno for tuning and comparing of the before and after.
#60
Do a little google searching, it's how I found the info on which TB's come on which bikes.