KB Pulley swap Q

[SVPAM]

Hi guys
I have 2.6 KB with 3.25''/4lb
this combo gave me 20lb of boost only !!!!
I want to go for 2.75/4lb to get more boost
Somebody told me that your engine will hirt !
But I said as long as I did not get 24lb from 3.25/4lb
so I will get 22-23 with this new combo 2.75/4lb
I will use race gas
mods are 60lb injec, Ford GT pumps, Stage II FPDM, Full exhaust

Is it the LT headers makes this decrease in boost ?


thanks guys

 

[Posi]

Well if you do this it better be while the car is on a dyno getting logged. Because if not you might do some serious damage quick. I don't have KB but going from a 3.25 upper to a 2.75 is a pretty substantial jump. Is this only for the track? Because if not I would stay with what you have.

 

[SVPAM]

No it will be for street
the problem that 3.25 should give me 20lb without lower, I got 4lb lower and the net boost is 20lb !!!
That's why I'm asking
by the way I will spray the baby
what do you think

 

[DOWN2EARTH411]

No it will be for street
the problem that 3.25 should give me 20lb without lower, I got 4lb lower and the net boost is 20lb !!!
That's why I'm asking
by the way I will spray the baby
what do you think

Hey I was just wondering what else do you have for a fuel system besides the gt pumps

 

[SVPAM]

Dual Ford GT fuel pumps, 60lb injectors and Stage II FPDM
No rails or lines
also, I will go for wet NX kit

 

[SVPAM]

any answers !!!

 

[SVPAM]

Tttttttttttttttttttt

 

[SVPAM]

helllllooooooooooooooo is any body there !!!!

 

[Justin@VMP]

You need good fuel for that much boost, at least torco, or race fuel. And of course it will need to be tuned properly.

 

[SVPAM]

Yes I will use Race gas
But why the boost is only 20lb with 3.25/4lb ?
Also, could I go for 2.75/4lb to get 23-24lb with race gas
I want to spray it

thanks

 

[Sl0w7pt3]

u should go 3" upper no lower and u should be right @ 22lbs of boost. 600rwhp++++++ U SAID U WANT SPRAY...:lol1::lol1::lol1::lol1::lol1: HOW BIG OF A SHOT? hopefully u have a built motor right??????? stock motor.....GOODLUCK make sure to have a towtruck # ready and enough $$$$$$$$ for the rebuild:rockon: