Boost leak or normal for this turbo and cams?

[mitsuclipsegsx]

Just bought a 97 gst with this mods and i hit 20psi between 4200-4300 in 3rd gear. Is it because of the fp2 cams? My boost tester is in my other car, so i wont be able to do a test till end of the week.

Pte 50 trim- non BB
fp2 cams
680cc injectors
adfx front mount
turbotrix 95 ported manifold with 38mm tial
ported evo 3 02 housing
megan 3" down pipe with qtp cut out with digi auto switch
255 walbro h/p fuel pump

 

[zippyshoe]

Does this car have a boost controller? If so, then your boost pressure depends on the boost controller setting. If you do not have a boost controller and the wastegate actuator is connected directly to the turbo's compressor housing or some other boost pressure source, then your boost pressure depends on the wastegate actuator rating.

 

[94Jettameowpsst]

That sounds about right with a set of cams. You may have a slight boost leak but cams always make you a little laggier.

 

[eclipsegsx1736]

That doesn't sound too far off. FP2 cams make slightly more power at a slightly higher RPM than the HKS 272s but have a nice friendly idle. I have a friend with a similiar setup, hitting 16ish psi by about 4000 with a non-BB 50 trim. Obviously still do the test and check for any pre-turbo exhaust leaks, you can use seafoam to test for that, you should probably use it anyway to clean the carbon out of the engine.

 

[daren_p]

Like was said always good to check intake & pre turbo exhaust leaks but I too would say that sounds about right for that turbo & those cams.

 

[dsm-onster]

Come on guys! That is terrible! I get better than that w/ a 60-1 compressor wheel (cams dialed straight up no SMIM or head work, evo3 exhaust mani). The PTE 50-trim comes w/ the same turbine i have. I'm not bragging at all because I've seen guys hit 20+ psi by 3600rpms w/ hks 272s (like fp2s w/ MORE duration). . . You have a leak at the least.