still not enough boost!?!?!
Mike I'm sorry I'm being a dick to you but you weren't listening and you were down talking me when you know I work on cars all day and it was getting on my last nerve, I have no problem with ever helping you out or changing you oil I just don't like doing it in the cold or the rain if you ever needed anything I would do it just don't down talk me cause it really grinds my gears
Joined: 12-30-07
Posts: 14,079
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From: NEPA
For the record, clogged cats raise boost. Clogged = restriction. More restriction = more "boost". Boost is the measurement of restriction
Then again, I keep forgetting that for a blower car you want to retard timing for more power......
vac lines crack. injector buckets loose their seal. The dealer is stupid
Oh, and if the stock boost gauge and the interceptor read the same, it is because they are BOTH reading the same signal from the PCM. Put a manual on in there and it'll be 100% accurate unless part failure. The PCM is NOT perfect at reading
FYI, a 2.8 pulley SHOULD be making 16-17 psi. Higher, there is a clogged cat. Possibly blew itself out and caused a slight drop because of the loss of the restriction.
BUT all of this has been stated before. If it is refused to be listened to, I can no longer help
Then again, I keep forgetting that for a blower car you want to retard timing for more power......
vac lines crack. injector buckets loose their seal. The dealer is stupid
Oh, and if the stock boost gauge and the interceptor read the same, it is because they are BOTH reading the same signal from the PCM. Put a manual on in there and it'll be 100% accurate unless part failure. The PCM is NOT perfect at reading
FYI, a 2.8 pulley SHOULD be making 16-17 psi. Higher, there is a clogged cat. Possibly blew itself out and caused a slight drop because of the loss of the restriction.
BUT all of this has been stated before. If it is refused to be listened to, I can no longer help
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Joined: 07-17-08
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From: Nevada
I have a queston why can't I boost higher then 12.5 on stage2 stage 3 pulley. I have no cat new belt 0 knock and low iat2
O also mods are he/do/h/e/cai and mechanical boost gauge/ also interceptor
O also mods are he/do/h/e/cai and mechanical boost gauge/ also interceptor
Last edited by Durtyss; Apr 27, 2010 at 12:32 AM. Reason: Automerged Doublepost
Thread Starter
Member
Joined: 09-10-07
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From: Ohio
Well I said before that there was no belt slip and I sprayed starter fluid on the intake and gasket and nothing happened but maybe Tom is right about my cat was prolly clogged because awhile back ago it was doing 20 psi and now it prolly finally blew out so it's not boosting as much and that would also be the lack of power
Tom is right? I've said that like 3 times thru this thread and you basically ignored I said anything about it. And what's this with the starter fluid? What's it supposed to do?
A retune wouldn't allow for more boost. The stage 3 pulley is marginally smaller than the stage 2 pulley if its a gm one. Also, as in kyles case possibly, the catless dp and header(if that's what the first "he" in your mod list is) are reducing pressure which is going to lower boost. High boost isn't always a good thing...most ppl try and use it as a bragging right on how their car haz mad powah...but I would personally rather run 18psi in a high flowing head and exhaust than 24psi on a very restrictive setup. All in all, you might be showing lower boost, but that's not necessarily a problem.
Also, if ur runnin a header, 3" catless dp and a full 3" exhaust(if I'm reading ur mods correctly) that's going to drop ur psi reading by a good 2-4psi depending.
Also, if ur runnin a header, 3" catless dp and a full 3" exhaust(if I'm reading ur mods correctly) that's going to drop ur psi reading by a good 2-4psi depending.
He's gm stage 2 on a 2.8 pulley and factory header, dp, and the gmpp exhaust. So his setup is way more restrictive than urs is. You might wanna get ur bpv checked too in case it might be stuck open
Joined: 12-30-07
Posts: 14,079
Likes: 197
From: NEPA
A retune wouldn't allow for more boost. The stage 3 pulley is marginally smaller than the stage 2 pulley if its a gm one. Also, as in kyles case possibly, the catless dp and header(if that's what the first "he" in your mod list is) are reducing pressure which is going to lower boost. High boost isn't always a good thing...most ppl try and use it as a bragging right on how their car haz mad powah...but I would personally rather run 18psi in a high flowing head and exhaust than 24psi on a very restrictive setup. All in all, you might be showing lower boost, but that's not necessarily a problem.
Also, if ur runnin a header, 3" catless dp and a full 3" exhaust(if I'm reading ur mods correctly) that's going to drop ur psi reading by a good 2-4psi depending.
Also, if ur runnin a header, 3" catless dp and a full 3" exhaust(if I'm reading ur mods correctly) that's going to drop ur psi reading by a good 2-4psi depending.
Last edited by Staged07SS; Apr 27, 2010 at 07:49 AM. Reason: Automerged Doublepost
Yeah but if he has a boost leak meaning it will only happen under boost, say a vacumm line that has a pin sized hole that will open up under boost and vent boost and close at vacumm. So therefor you can not find that boost leak. I think he is runnign the correct amount of boost, he just had a cat issue before making the car have more boost. my firends car has a cat, with everything stock and his cat went bad and caused him to run 22lbs on a stock pulley because of the restriction.
Staged, I was referring to kyle's setup and not urs. If he was talkin about yours and I misunderstood, oops lol.
Kyle-chevycobaltss3 is right and that's why I was asking about the starter fluid. If you have a leak somewhere in the system, it may ONLY leak under boost like I said before which kinda makes ur starter fluid test useless unless you can find a way to run full boost and be under ur hood at the same time lol. And you can't see full boost for more than a second, if at all, unless ur putting a load on the engine. Honestly, if I were you, I would borrow alex's boost leak tester and hook it to ur intake and fill the engine with 20lbs and see if you've sprung a vac leak or if your gasket might be leaky. When they put ur new engine in, its possible they didn't tighten the blower bolts to spec and its causing a leak right there, but only under high boost
Kyle-chevycobaltss3 is right and that's why I was asking about the starter fluid. If you have a leak somewhere in the system, it may ONLY leak under boost like I said before which kinda makes ur starter fluid test useless unless you can find a way to run full boost and be under ur hood at the same time lol. And you can't see full boost for more than a second, if at all, unless ur putting a load on the engine. Honestly, if I were you, I would borrow alex's boost leak tester and hook it to ur intake and fill the engine with 20lbs and see if you've sprung a vac leak or if your gasket might be leaky. When they put ur new engine in, its possible they didn't tighten the blower bolts to spec and its causing a leak right there, but only under high boost
Joined: 12-30-07
Posts: 14,079
Likes: 197
From: NEPA
Staged, I was referring to kyle's setup and not urs. If he was talkin about yours and I misunderstood, oops lol.
Kyle-chevycobaltss3 is right and that's why I was asking about the starter fluid. If you have a leak somewhere in the system, it may ONLY leak under boost like I said before which kinda makes ur starter fluid test useless unless you can find a way to run full boost and be under ur hood at the same time lol. And you can't see full boost for more than a second, if at all, unless ur putting a load on the engine. Honestly, if I were you, I would borrow alex's boost leak tester and hook it to ur intake and fill the engine with 20lbs and see if you've sprung a vac leak or if your gasket might be leaky. When they put ur new engine in, its possible they didn't tighten the blower bolts to spec and its causing a leak right there, but only under high boost
Kyle-chevycobaltss3 is right and that's why I was asking about the starter fluid. If you have a leak somewhere in the system, it may ONLY leak under boost like I said before which kinda makes ur starter fluid test useless unless you can find a way to run full boost and be under ur hood at the same time lol. And you can't see full boost for more than a second, if at all, unless ur putting a load on the engine. Honestly, if I were you, I would borrow alex's boost leak tester and hook it to ur intake and fill the engine with 20lbs and see if you've sprung a vac leak or if your gasket might be leaky. When they put ur new engine in, its possible they didn't tighten the blower bolts to spec and its causing a leak right there, but only under high boost
yep yep mike duh man lol. Yeah i am having a issue when Under boost i will never go over 16 lbs anymore i thought it was my bypass but it was not, i checked my intake tight as can be, but it sounds like the bypass plate is openeing up under boost kinda wierd, i am still looking for the reason. I am not running boost solonoid as of right now and i still only get 16 and the needle kinda fluters land supercharger fluters like the sound of the bypass throttle plate opening up. I wonder if it could be happeneing. lol
if you think it might be a vacum leak just got ahead and replace them all. its hard to find leaks in the lines its much easier to just spend a couple bucks and replace the lines.
a boost leak detector should fit no matter what. what i would do, is get some sort of uv dye and under boost when driving inject it some how through the intake piping where the breather hose for the cranckcase is supposed to be. I dunno. it should work lol, i am gonna be repalcing all my vaccum lines
a boost leak detector should fit no matter what. what i would do, is get some sort of uv dye and under boost when driving inject it some how through the intake piping where the breather hose for the cranckcase is supposed to be. I dunno. it should work lol, i am gonna be repalcing all my vaccum lines
Alex's tester would work just fine on ur car, just unhook your intake at the coupler on the blower and clamp the tester in where the intake goes and pressurize it. The only problem I see you runnin into is alex's tester might be too big to fit ur coupler. I think his is a 3" and ur injen is only 2.5 but I could be wrong, just text him and ask.
As far as the uv dye, wouldn't that bog the engine out if you sprayed it in there while under wot? Easiest way I can think of to do that test would be while its on a dyno since the cars at wot and not moving lol
As far as the uv dye, wouldn't that bog the engine out if you sprayed it in there while under wot? Easiest way I can think of to do that test would be while its on a dyno since the cars at wot and not moving lol
Alex's tester would work just fine on ur car, just unhook your intake at the coupler on the blower and clamp the tester in where the intake goes and pressurize it. The only problem I see you runnin into is alex's tester might be too big to fit ur coupler. I think his is a 3" and ur injen is only 2.5 but I could be wrong, just text him and ask.
As far as the uv dye, wouldn't that bog the engine out if you sprayed it in there while under wot? Easiest way I can think of to do that test would be while its on a dyno since the cars at wot and not moving lol
As far as the uv dye, wouldn't that bog the engine out if you sprayed it in there while under wot? Easiest way I can think of to do that test would be while its on a dyno since the cars at wot and not moving lol