[aleborjas]

hi
i have my car with a 306, stock heads ported, stock intake ported, 30pound inyectors, 75mm maff, 274HR cam. the problem is that i tried a lager TB 65mm with spacer and my car ran lot slower why? i had to put back the stock one again! lot of people i called told me to change the intake and put 70mm TB but i dont whant to spend my money and probaly my car is going to be worst!!!!
what should i do and why my car ran slower with more air i think it was going to be better because i have big inyectors.:sosad::worship:happyhapp

 

[Stangboy5666]

i have a book that dynos several popular 5.0L mods, and throttle bodies are the biggest pretender out there. On a 400 hp beast, a 65mm throttle body only gained like 3 hp over stock, a 70 was about the same as stock, and a 75mm actually made less power. I wouldnt waste my time on throttle bodies.

 

[aleborjas]

i bought a RPMII and 70mm TB for very cheap price 300$ all. what happens if i put it with my combination?
i plan for a 347 but not now like for february!
can i got on 12' s with my 306? what do i have to do?

 

[Ga-Pony]

You got to bottle feed it...

 

[GhostDog 5.0]

Get rid of those 30lb injectors and go with 19lb.

 

[aleborjas]

what about the intake?

 

[speedytang]

You don't have enough motor for 30lb injectors. You can go back with 19lb injectors and the larger throttle body and you will pick up some speed at WOT.