Quote:
Originally Posted by RayRay88
How is it hype when both people that have them up and running are making very decent mid range hp/tq bumps?
I think people are mistaking these for FI alternatives. ITB's are never big power-getters. The only time I've seen them make huge power numbers are on motors where the valvetrain/heads are built to the point where it starts out flowing traditional manifolds or had trash manifolds to begin with.
|
this is very true... on a stock motor there will be literally 0 power gains at the top of the powerband, however from 2k-6k there will be a much meatier powerband as the air is able to flow in without restriction to 4 different throttle bodies directly to the intake ports of the motor.
there are 2 setups that will benefit greatly from this, built high compression motor that redlines at 8k+ with cams and uses e85... the e85 allows the motor to run cooler and with the increase of air at lower RPMs and the more aggressive cams and high redline will widen the spread of the ITB midrange gains, but even then you wont get any "peak gains" over say a ported 2017 manifold and a grams throttle body.
forced induction, having the 4 throttle bodies with a turbo and e85 with allow the compressed air to flow in at an even greater rate and colder due to the e85 than the stock plastic manifold and pump gas. i think that jade_350z has a dyno showing this on his car with the gt2867r kit as well... gushi also ran his car with the itb and t518z set up but both only used pump gas.
if someone buys a stock frs and throws these one and expects to get their moneys worth, they will be severely let down... if you tie in the rest of the mods to actually use the ability for the ITBs to be put to use... then it can be worth while.