how much boost should i run??
 

i got a 98 eclipse, hahn racecraft stage II 20g turbo, 2 stage fuel pump, 270cc fuel injectors, msd coil & wires. all stock internals,,,what kind of boost p.s.i. should i run???

RE: how much boost should i run??
 

Is this a 420a or 4g63?

RE: how much boost should i run??
 

420a

RE: how much boost should i run??
 

I wouldnt run over 8psi with the stock internals. I'd run 6 on a day to day basis myself.

RE: how much boost should i run??
 

Do you get any signs of boost creep? If not, 8 psi is good. Don't go any higher than 10 psi on stock internals! If you do creep, how high? Otherwise, 8 psi.
JL's recommendation is a good one too.

RE: how much boost should i run??
 

w/ a 20g turbo i wouldn't go any higher than 8lbs... thats a good sized turbo to be pushing 10lbs. a good rule of thumb for the 420as is not to go over 10psi but on a turbo as large as the 20g 8 sounds good. i'm curious about something though... you said you have what size injectors? 270cc's i don't believe is correct... and if so i don't think that would push 8lbs to be honest lol once you geta bottom end rebuild you will be good up to about 20lbs of boost before you need head work.

RE: how much boost should i run??
 

thanks for the advice guys, ill stick with 8 $ this winter i'll beef up the lower end & turn up the boost!!!!!!!!!!!!!!!!!!!!

RE: how much boost should i run??
 

also should i be using a bigger inj. than 270cc???????????

RE: how much boost should i run??
 

absolutly!....I wouldn't think you would be able to run 8lbs of boost with 270cc. What exactly are you running right now?

RE: how much boost should i run??
 

acording to the kit i got from hahn i am runnung the 270 CC,,, what should i get for my 20g turbo???? and what will be the diffrence??????????