20lbs of boost with a 2.8?

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Apr 13, 2009 | 04:54 AM

#26

2MCHBoost

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From: Climbin In Your Window...

Quote:

Originally Posted by AcesNEights

Im seeing 18psi with a 2.8 zzp header, 3" dp, and 2.5" catless exhaust...

Thanks aces.

Apr 13, 2009 | 05:58 AM

#27

Steven Flit

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From: Los Angeles, CA

Quote:

Originally Posted by HunterKiller89

/thread

yes yes casey... its ok lol

get rid of the cat already OP!

Do yourself a favor and lose the 2.2 gmpp exhaust as well. It 2 1/4 design isn't for an LSJ.

Apr 13, 2009 | 06:15 AM

#28

nicksredline

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From: ohio

yeah in the cold with my punched cat i was boosting 15.9( almost 16 lol) so close but i don tknow if it wasjust the cold or what?

Edit stock pully

Apr 13, 2009 | 06:44 AM

#29

2MCHBoost

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From: Climbin In Your Window...

What are the typical gains from a 3" catback?

Apr 13, 2009 | 09:33 AM

#30

SlowLSJ

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From: Flint Mi

am only hitting 16 pounds on 2.8

Apr 13, 2009 | 10:29 AM

#31

Snakes709

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From: Edmonton

i think thats right. i got 2.8/60 and im hiting 135kpa which = to 19.7ish psi

Apr 15, 2009 | 03:17 AM

#32

hungryhip-ccp

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From: SoCal, Lancaster

Quote:

Originally Posted by Steven Flit

I was under the impression that our stock guages were hooked up via the ECM. I would assume that makes it electronic, considering it's not hooked up via a vacuum line like I've seen.

Either way... only boost I TRUST is what my Hptuners logging tells me.

thats were the gauge is getting its input from, the map sensor

Apr 15, 2009 | 04:47 AM

#33

rukkee

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From: Western NY

Quote:

Originally Posted by Snakes709

i think thats right. i got 2.8/60 and im hiting 135kpa which = to 19.7ish psi

Are you running stock exhaust?

Apr 15, 2009 | 09:31 PM

#34

SSLOW06

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From: Chanfunetta NY

Having A Similar Problem And Im Trying To Figure It Out Myself I Have No Cat And Full Exhaust All Cooling Mods And Alcohol Injection Im Running About 22 Lbs Of Boost I Also Have A Scan Gauge So It Digital Not The Stock Gauge Im Going Crazy Trying To Figure It Out My Iats Jump From 130 To 160 I Dont Understand Is This Normal ?

Apr 16, 2009 | 12:57 AM

#35

rukkee

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From: Western NY

Quote:

Originally Posted by SSLOW06

Check the Inter cooler pump and make sure its working, There have been people on here that have experienced an over boost condition when the pump has died. That would also explain the IAT2 jump too.

Apr 16, 2009 | 03:25 AM

#36

wtpcobaltss

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From: bowling green ky

its called backpressure.. u need to free up ur exhaust relive some pressure...i was hitting 20lbs on 2.8 then cut off the the cat and slapped a header on her with a hks muffler now i see 17 lbs and much more power.