rockstarbass1

well got it all together and got my tune in. seams OK but nothing more. thought it would pull wayy harder then noticed when wot im only getting about 9 psi im running a 2.9 inch pulley something isnt right here. any one have any ideas? also i think i do have an exhaust leak but dont think that has to do with it. and the car is ideling very weird, but im hoping thats the tune and will be fixed soon. it wants to keep its revs and not drop when comming to a stop. ill post up some vids and pics in my build thread later thanks everyone for your help so far!

SmackinJuice

You know lately when i just start up my car (40-50 degree weather) i have a problem that it keeps it's idle at 1.1K rpm, so if i shift into 1st it will be like on cruise control to 5mph, then 2nd 10-15 mph.

not thread jacking just wondering if that's what you mean by it keeps it's revs up?

also i know with turbo applications having an exhaust leak will definitly keep you from holding good boost or going as high as you should. since super are driven different I dunno, could be your tune. I thought 2.2's usually don't want to go below 3 inch pullies. nonsense i know!

You know lately when i just start up my car (40-50 degree weather) i have a problem that it keeps it's idle at 1.1K rpm, so if i shift into 1st it will be like on cruise control to 5mph, then 2nd 10-15 mph.

not thread jacking just wondering if that's what you mean by it keeps it's revs up?

also i know with turbo applications having an exhaust leak will definitly keep you from holding good boost or going as high as you should. since super are driven different I dunno, could be your tune. I thought 2.2's usually don't want to go below 3 inch pullies. nonsense i know!

joshc.

I would check the bypass valve on the supercharger same thing happened to a friends car said it was seeing low boost numbers, my first thought was a boost/vacuum leak. Told them to check the bypass valve sure enough solved the problem.

rockstarbass1

Well do what with it? I did take it off to podercoat the sc

joshc.

Well my buddy had an extra one laying around and swapped it on. I'm sure theres a way to test it I'm just no sure how.

MP81

iTrader: (2)

I'm thinking vacuum leak which translates into a boost leak, which just happened to me recently. I started getting a high idle code, so I took it out for a test drive to datalog and noticed my vacuum was at about 15 at idle, not 20, and my idle was about 900-1000. When I got on it, boost only went to about 11psi instead of 14...

I found out the rubber nipple I had on the intake manifold nipple (under the fuel rail) had cracked and was leaking. Replaced it with a 90, and everything has been back in business. If you have idle or vacuum issues (I hope your boost gauge has a vac side), this could be your problem.

rockstarbass1

My car is sitting at about 22 vac at idel at about 1250 to 1500 rpm.... also what nipple are you talking about? The one for the boost gauge? Or a dif one? How do I test for a vac leak? And lastly how do I know how to posistion my bypass valve?? I can fillde with that and see it makes a dif.

tru2nrtt777

iTrader: (1)

What is you gauge showing for boost at WOT? With a 2.9 on a 2.2 you should be seeing ~14 psi or right at 1 bar. The exhaust leak wouldn't have much to do with it aside from(depending on the severity of the boost leak) potentially raising efficiency and upping CFM's showing less pressure(boost).
Sounds like turbo lag which can be compensated with tuning and decent compression pistons, stock internals or built 2.2?

Turbo applications with exhaust leaks before the turbo(header/manifold/turbo casting/head) would cause a loss of pressure but after the turbo an exhaust leak wont matter. The 3.0 pully used to be a safeguard but I currently have a 2.8 and I believe Jn2 has been running a 2.7 for a while now... With the better tuning coming out thanks to Vince the 3.0 is now a thing of the past.

rockstarbass1

Stock internals and I'm getting 9 to 10 psi at wot... just heard back from vince the crazy idel issue isn't in the tune its a boost leake after the tb he said... bu the only issue of takin carb cleaner and sprayin **** to find it won't work. I just powder coated everything. So how do I find it? Could a bad gasket on the intake mani to engine be an issue or sc to intake? I did use used gaskets was told they wouldn't be an issue. Also where can I find torque specs

tru2nrtt777

iTrader: (1)

I would check the TB gasket, all vac lines to SC/IM, then start tearing apart to get to other gaskets...

rockstarbass1

But the dude I bought this stuff off of said he said no issues (hatrickstu) butttt the intake to motor gasket di get kinda messed up in shipping

rockstarbass1

Also what do you mean "check" the tb gasket? Its just the ring of rubber and it looked fine before install if it didn't I wouldn't of used it... also how do I "adjust" the bypass valve? Its got the 2 longated slots on it where the bolts go in is there a specific way it should be mounts? Sorry morning bump I'm really freakin about this and need it fixed.. I really hope its just a gasket ugh

joshc.

Its deffinatly a vacuum leak, if you could get your hands on a smoke machine it might show it otherwise its just experimenting and retightening hoses.

rockstarbass1

i have a fog machine if that works..... explain how to do it also i ordered new gaskets today and currently put an lsj down pipe on that doesnt leak im seeing 10 psi... 11 sometimes at wot in 3rd stil have a REALLY bad idel at like 1500 rpm n it likes to float

joshc.

Hook it up to a vac line.

Jn2

iTrader: (1)

the bypass valve will give small play, the the actuator, the actual valve, you nee the blower off to make sure its completly shut when the actuator is on...also what conditions are the rotors in? i know with a 3" i was getting 13-14psi, with my 2.8 i see 16-18psi depending on IAT1's...bc of my shitty megan exhaust, hoe is only 2.25" ID x_x false advertisement on their end calling it a 2.5...

IonNinja

do you have the bypass valve plugged?

Jn2

iTrader: (1)

if the bottom nipple is plugged he will only see 2 mybe 3psi..we acciently did that with interviews cars...that bottom nipple need to be left venting to atmostphere

rockstarbass1

bottom is venting to atmosphere top is in the sc. i played with the thing all day,my buddy with a lsj came over and helped me. we put on his stock lsj down pipe for now to get rid of that issue while my dp is getting fixed. yes with the bottom plugg i only got like 3 psi lol. then i plugged the line going to the sc (so basically the valve was always closed and the actuator didnt do nothing (figured id see full boost if my actuator was messed up) and still only like 10 or 11 psi... also tried all kinds of adjustments with the thing. its gotta be a leak. i have a fog machine gunna give that a shot tomorrow. dont know exactly how but ill figure it out lol gotta figure out a way to reduce the end of the fog machine to something small and seal it onto the car...

oh and the sc rotors/blades w.e u call em are in good shape... other then there is no teflon on them any more seeing its a high milage sc that had meth ran on it and the teflon was peeling off and my ******* didnt know what the stuff was and hit it with carb n choke cleaner and sprayed it all right off... but again i was told that wont be my issue by multiple people and my buddy has seen guys with no teflon on the blades.... but for ***** n giggles almost wanna throw my blower on someone elses car just to make sure its workin right... new gaskets r on order will be here tom or wed

Jn2

iTrader: (1)

Also ur boost will vary based on iat1's...I tend to get less boat when it's hot, more when it's cold

coopercharge

iTrader: (4)

hmm good question

tru2nrtt777

iTrader: (1)

Now youre making me worry about my SC project...

rockstarbass1

The car runs I'm driving right now lol but not how it should anf the idel at 1250 right now sucks... don't worry too much ha

If I post back tomorrow night or Thursday. Saying I changed all the gaskets and I'm still having issues we can worry together hahaha

krautsalat

haha wish I had an constant idle at 1200. When I am at idle it fluctuates like crazy from 500-1300 every once and awhile and will stall sometimes at lights if I don't press the gas.

rockstarbass1

Yea ill take my 1250 to 1500 over stalling out haha