boost; what's yours at? - 3000GT/Stealth International Message Center

motorhead0293 · 05-06-2008, 07:47 PM

well, me and my dad took my car for a spin the other day, and noticed when we stepped on it, (i actually looked at the boost gague this time) and it went up to 20 psi! my dad said that's alot, so i wanted to see what everybody else considers "safe". i dont want the engine to blow or something along those lines, so, what do you think? to high? could go higher? what? thanks in advance!

LittleGoose · 05-06-2008, 07:51 PM

Assuming you're on a stock setup, yes too high. Usually safe to run 9B's around 12-13psi safely. If you're datalogging and monitoring everything, people often run ~15psi.

Gramdollar · 05-06-2008, 07:57 PM

yeah bro i'd keep the full throttle to a negative until you adjust your boost controller

digger · 05-07-2008, 12:35 PM

The factory gauge is off. I have a autometer hooked up as with the factory and the stocker is not even close at least on mine. 12 pounds of boost pegs my factory one. I would put in a manual gauge and see where your at.

i3igpete · 05-07-2008, 12:45 PM

the stock boost gauge is a load meter, not a boost gauge.

syangvr4 · 05-07-2008, 12:48 PM

Im boosting around 14.5psi on hotwaired pump and getting no knock with narrow band of .89 on both o2's. so I think im good. Setup is all stock accept for a FMIC, air filter. Pre's and Main cats still in.

mikesx4911 · 05-07-2008, 12:55 PM

15 psi, yea I would shit my self if i boost 20 psi I would cry for my motor haha

bjmsam · 05-07-2008, 07:51 PM

Quote:

Originally Posted by motorhead0293

it went up to 20 psi!

He must have an aftermarket gauge...

motorhead0293 · 05-07-2008, 08:01 PM

so 15 psi at max should be good? (i dont even know if it's stock or not. my dad doesn't want to call the owner untill we have the registration and title, just in case). i would have called him myself, but i don't think he/she would buy it. "hey, im pj prendergast. im 15, live in new york, and i bought your car off of ebay." not too convincing. and i know, there is an "autometer" brand boost gague in the car. but, as soon as i find out what this thing really has under the hood, i will set it to like 13 psi. but one thing we did was we took out the turbo timer, but how would that affect it? and my dad aparently took it out again today, and driving it up the street (not revving it out alot, but still up there) it would cut out, like a rev limiter, except for the boost, or like grabing the brakes suddently, and then letting off a second later. this hasn't happened before out of all the the other times we took it out for a joy ride. so, im starting to get a little nervous with this car, i dont want to kill such an awesome ride, especially doing something stupid like not knowing why it blew up at 20psi for example. has anyone had that happen before? (the cutting out type thing i stated?)

TT4ME · 05-07-2008, 08:12 PM

Sounds like fuel cut.

05-06-2008, 07:47 PM	#1 (permalink)
motorhead0293 New User - Please be kind Join Date: Mar 2008 Location: Kinderhook, NY Drives: 3000gt vr4 Trader Rating: (0)	boost; what's yours at? well, me and my dad took my car for a spin the other day, and noticed when we stepped on it, (i actually looked at the boost gague this time) and it went up to 20 psi! my dad said that's alot, so i wanted to see what everybody else considers "safe". i dont want the engine to blow or something along those lines, so, what do you think? to high? could go higher? what? thanks in advance!

05-06-2008, 07:51 PM	#2 (permalink)
LittleGoose 06 Cobalt SS Supercharged Join Date: May 2005 Location: Charleston, SC Drives: The Ladies Wild Trader Rating: (1)	Re: boost; what's yours at? Assuming you're on a stock setup, yes too high. Usually safe to run 9B's around 12-13psi safely. If you're datalogging and monitoring everything, people often run ~15psi. __________________ My Cobalt SS Supercharged Dyno: 228whp 204tq (w/CAI, Cat-back, S2 and 3.06" pulley) Mods: AEM Cold Air Intake \|\| GM Stage 2 Tune \|\| 42.5lb/hr Injectors \|\| 2.9" S/C Pulley (3.35 stock) \|\| Magnaflow Cat-Back Exhaust \|\| NGK Copper Plugs \|\| BWoody Solid Front Transmission Mount \|\| Ingall's Engine Torque Damper \|\| DC Sports Front Strut Tower Bar \|\| 35% Carbon Black Tint \|\| ARK Shorty Antennae

05-06-2008, 07:57 PM	#3 (permalink)
Gramdollar what would dave thomas do Join Date: Jul 2007 Location: Blairsville, PA Drives: 93 pearl white vr-4 Trader Rating: (0)	Re: boost; what's yours at? yeah bro i'd keep the full throttle to a negative until you adjust your boost controller

05-07-2008, 12:35 PM	#4 (permalink)
digger New User - Please be kind Join Date: Jun 2003 Location: northern wi Trader Rating: (1)	Re: boost; what's yours at? The factory gauge is off. I have a autometer hooked up as with the factory and the stocker is not even close at least on mine. 12 pounds of boost pegs my factory one. I would put in a manual gauge and see where your at.

05-07-2008, 12:45 PM	#5 (permalink)
i3igpete ''the professor'' Join Date: Feb 2005 Location: Chicago, IL Drives: GoPigGo v2.0 Trader Rating: (68)	Re: boost; what's yours at? the stock boost gauge is a load meter, not a boost gauge. __________________ Maddog Performance Engineering 13T World Record - you'll find it here. We love trans drops

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05-07-2008, 12:48 PM	#6 (permalink)
syangvr4 Noobie Join Date: Apr 2007 Location: Sheldon, IA Drives: 95 pearl white Vr4 Trader Rating: (9)	Re: boost; what's yours at? Im boosting around 14.5psi on hotwaired pump and getting no knock with narrow band of .89 on both o2's. so I think im good. Setup is all stock accept for a FMIC, air filter. Pre's and Main cats still in. __________________

05-07-2008, 12:55 PM	#7 (permalink)
mikesx4911 3000 lover Join Date: Aug 2007 Location: Chicago IL Drives: 91 VR4 Trader Rating: (6)	Re: boost; what's yours at? 15 psi, yea I would shit my self if i boost 20 psi I would cry for my motor haha __________________

05-07-2008, 08:01 PM	#9 (permalink)
motorhead0293 New User - Please be kind Join Date: Mar 2008 Location: Kinderhook, NY Drives: 3000gt vr4 Trader Rating: (0)	Re: boost; what's yours at? so 15 psi at max should be good? (i dont even know if it's stock or not. my dad doesn't want to call the owner untill we have the registration and title, just in case). i would have called him myself, but i don't think he/she would buy it. "hey, im pj prendergast. im 15, live in new york, and i bought your car off of ebay." not too convincing. and i know, there is an "autometer" brand boost gague in the car. but, as soon as i find out what this thing really has under the hood, i will set it to like 13 psi. but one thing we did was we took out the turbo timer, but how would that affect it? and my dad aparently took it out again today, and driving it up the street (not revving it out alot, but still up there) it would cut out, like a rev limiter, except for the boost, or like grabing the brakes suddently, and then letting off a second later. this hasn't happened before out of all the the other times we took it out for a joy ride. so, im starting to get a little nervous with this car, i dont want to kill such an awesome ride, especially doing something stupid like not knowing why it blew up at 20psi for example. has anyone had that happen before? (the cutting out type thing i stated?)

05-07-2008, 08:12 PM	#10 (permalink)
TT4ME Black Beast Rebuild 93% Join Date: Jun 2007 Location: NE Wisconsin Drives: 94 TT, 92 ES, 92 TT Trader Rating: (8)	Re: boost; what's yours at? Sounds like fuel cut.