Why cant i hold 20psi?
Mar 12, 2004, 02:56 PM
#46
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Originally posted by XRS-Lift
its an autometer guage. I have it tapped in where the instructions recommended. It starts to taper after 5000 rpm and by 7000 its prettymuch dropped 3.8 psi. the line to the mbc is comming from the wastegate actuator.
its an autometer guage. I have it tapped in where the instructions recommended. It starts to taper after 5000 rpm and by 7000 its prettymuch dropped 3.8 psi. the line to the mbc is comming from the wastegate actuator.
I love asking the same questions twice...
Mar 12, 2004, 02:58 PM
#47
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ive been reading around and i came to the conclusion that my aftermarket o2 housing may be the problem for my boost drop.....i think the waste gate is letting out too much exhaust for it to keep boost up......so i guess i have to wait to put my gt turbo in to get a external waste gate so i can hold boost......my car in the past held 20 till redline but also since i put the o2 housing in its been dropping a pound but w/e i like the quicker spooling from the o2housing any ways......its just some thing that i will have to deal with........your not gonna die from boost drop and you wont blow your motor .......so w/e
Mar 12, 2004, 03:07 PM
#48
My mbc spikes at 22-23 then drops to 20-21 . I think you will allways have a spike as soon as bost hits . If you rev it slow up to 6k then punch it dose it still spike ? I also thimking thats how Buscher set up there evo not on spike psi but on hold psi ( ie finshline at the 1/4 mark) . A friend of mine has the txs dual boost control and it dose the same thing.......
Mar 12, 2004, 03:20 PM
#49
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Originally posted by EvolvedDSM
Being vague isn't going to help anyone solve your problem. Specifically, where is your gauge tapped? I hope the line from the MBC is going to the wastegate actuator, but where does the line to the MBC originate?
I love asking the same questions twice...
Being vague isn't going to help anyone solve your problem. Specifically, where is your gauge tapped? I hope the line from the MBC is going to the wastegate actuator, but where does the line to the MBC originate?
I love asking the same questions twice...
Mar 12, 2004, 03:41 PM
#50
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Originally posted by XRS-Lift
Sorry im not a mechanic. Its been a long time since i installed the guage and mbc and im not sure what all the names of the parts of the engine are. i would have to go back and look at it to remember correctly. I mentioned all i could remember.
Sorry im not a mechanic. Its been a long time since i installed the guage and mbc and im not sure what all the names of the parts of the engine are. i would have to go back and look at it to remember correctly. I mentioned all i could remember.
Mar 12, 2004, 03:49 PM
#51
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Works P2 flash - 19-20psi all the way to 7500 rpm, stock BOV, ambient temperature around 75 degrees, WOT, no exhaust mods.
Autometer boost gauge.
Are you sure you are WOT till redline?
Autometer boost gauge.
Are you sure you are WOT till redline?
Mar 14, 2004, 09:05 PM
#52
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ya im sure. Im getting a dynoflash in a couple weeks anyway but i just wanted to find out what was causing it in the first place.
To EvolvedDSM
you need to stop being such a know it all ***** and relax. I cant go to my car because its in the dealership having its syncros replaced due to a faulty 5th geear syncro that woulc cause it to grind at high rpm shifts.
To EvolvedDSM
you need to stop being such a know it all ***** and relax. I cant go to my car because its in the dealership having its syncros replaced due to a faulty 5th geear syncro that woulc cause it to grind at high rpm shifts.
Mar 14, 2004, 09:31 PM
#54
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Originally posted by broeli
I also get boost spikes and boost taper. I have an mbc, Dynoflash, and full 3" exhaust. I taper down about 3 psi as the rpm's rise.
I also get boost spikes and boost taper. I have an mbc, Dynoflash, and full 3" exhaust. I taper down about 3 psi as the rpm's rise.
