I finally worked out my two CEL's that I got after the headgasket install.

1st code: P0017, Cam sensor was installed wrong by the guy at the machine shop. I timed it right and the code went away.

2nd code: P0107, Map sensor was not reading properly. I unplugged the connectors, cleaned them with dielectric electrical cleaner, and that code went away.

Took it for a test drive and she pulled like a rocket ship! With my 2.8" pulley and new headgasket and studs I pulled 20psi! Yes, you're reading this right 20 psi! It felt like it too because I have never ever been pushed into my seat that hard!

I think a trip to the dyno this week is in order.

 

custom tune ? is that how your getting 20psi? if you didnt do anything to get that, something aint right...

 

Where did you purchase the headgaskets, and headstuds from, Thats awesome 20psi, so i guess you can feel the increase.

 

yeah 20 isnt right. somethings wrong

 

i dont think studs would affect it would they?

 

umm dude if you're running 20 psi with a 2.8" pulley, something is bad wrong. start out by checking your cat

 

unless the new cometic headgasket is sealing that much better.....and stockers leak..

 

but if he has alot of power then it wont be the Cat. if the head gasket is doing that. im gonna get one

 

Hmmm. Do you have a mechanical boost/vac gauge or the stock one? I wonder if the stock one is for some reason reading wrong or what the big differance is.

I guess it could just be the pulley. I think OniMirage is hitting between 15 and 17 psi with the Injen and GM Stage 2. I can't remember for sure though.

 

Damn! Imagine if you have a 2.6 or 2.5! You'd be pushing 22-23 psi!

 

studs will seal the head to the block much better even with a stock gasket....

 

if those stock gaskets were leaking over 2psi you would know it.

 

agreed, but there coul dbe a lot of explanations as to why.....

 

The boost gauge is stock. It has read accurate ever since I bought the car, so it's not that. It has to be the headgasket and studs sealing better because I honestly have never felt the car pull so damn hard. The 2-3 shift resulted in a blast that further slammed me in my seat. It was absolutely undescribable! I am so damn happy right now it's not funny. Oh, and it was 89 degrees and humid out to top that!

I think this week I'm going to the dyno for ***** and giggles.

 

The MAP reads the pressure in the manifold not in the cylinders. So how well it's sealing doesn't really have much to do with it.

If your doing 20PSI with a 2.8 you need to figure out what else is wrong. I have a 2.8 and I push 16.5 psi.

 

ah you had to go and stop it so soon, i wanted to see what kind of crazy reasoning they had for a headgasket giving it more boost

<edit> my next post was going to be asking how it was feasable that a blower displacing 124lps of air @7000 car rpm was creating 20psi in an engine that would naturally be using 116lps just to throw some complication into it

 

Glad to hear that you are on the road again and that your car is perfoming better than expected. Keep us informed as to how it continues to work out for you.

 

cant wait till he comes back with the sheets and proof. his cars probly a freak. we know how unpredictable they are. but who knows i could be wrong also. get them sheets back asap to stop all this hate. how much you pay for it all and where you get it at?

 

it's not hate.. it's just that something is wrong with his car, because headgaskets don't give you boost

 

im pushing consistant psi levels of 16.5 or more at any given time during wot. Cobalt_Supercharged was there when I first hit 16+ psi after I installed my cai. I am only taking a guess but I should be pushing 18+ when I order and install the 2.8 which will be within a month after vacation. 20 psi seems a bit much but if that is the case that is incredible news.

 

Yeah limp mode might be one indication or the plume of black smoke out the exhaust from being over fueled.

 

Ok, I had my GF take a video with my camera phone since the camera died. I cannot get it uplaoded anywhere for the last hour. She about **** herself though when I took her for a ride at 20psi!

 

thats odd, i have a 2.8 and like the others , only push 16.5 to 17 psi. somthings not right

 

wish my car hit 20, but thats weird that yours is only getting 16.5-17. i swear im getting 17.5 in mine. il have to recheck it in the morning but im sure its more then 16.5

 

if there is leaking in the cylinder there will be less psi in the manifold. Think about it this way. Poke a hole in a plastic bottle and put a balloon with a very small hole in it on the other end. The balloon will blow up a little bit when you blow into the bottle, but it will leak slowly. Now make the hole on the balloon a little bigger and you will have to blow alot harder to get that balloon as big. The pressure in the plastic bottle when blowing with the same pressure will be greater in the first one. It shouldn't make as big of a difference as it is, but it will make a difference.