Strange loss of power after intercooler install - can't explain
12-16-2009, 12:07 AM
#42
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looks can be deceiving. I am coming from the import world but, throttle body orings, gaskets, little dirt under a coupler. compressor cover not sealing, bov leaking...etc
12-16-2009, 10:01 AM
#43
50 or 100cfm can't escape through gaskets or seals... I have no BOV... I rotated compressor cover when installed IC, but tightened it down. I really does look like smth. is choking flow at high flow, because at 3500rpm when I turn up boost I see nice gain in boost and torque, but at the end it all falls very quickly. I've compared graphs, and I still have lower power at 6000 than I had without IC. It falls real quick.
12-16-2009, 09:24 PM
#44
What's downstream of the turbo? A clogged cat or something can choke up the entire system.
Also try pulling off your air cleaner and checking for restrictions. All worth checking, assume nothing.
Jim
Also try pulling off your air cleaner and checking for restrictions. All worth checking, assume nothing.
Jim
Last edited by DeltaT; 12-16-2009 at 09:30 PM.
06-18-2010, 02:06 AM
#47
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I got my mishimoto off ebay. No problems so far. Then again, Im referencing my WG at the intake manifold so any drop through the IC is compensated for.
of course you can make turbo work harder at moderate boost level to compensate, but there's a penalty in form of mileage, EGT, and turbo life span
06-18-2010, 07:56 AM
#49
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You also do not know if you have any boost leaks because you "looked" at the couplers....
I would not use this thread to pass judgment on any ebay intercoolers. I have used many and they all perform great. My personal cars run treadstone a/a or ebay cxracing 1000+hp w/a intercoolers.
06-18-2010, 08:19 AM
#50
you say before IC, but you really mean at the turbo. I could never get a sane number at the turbo, yet 12 inches down the way in my manifold un intercooled even I would read a 5psi difference.
You also do not know if you have any boost leaks because you "looked" at the couplers....
I would not use this thread to pass judgment on any ebay intercoolers. I have used many and they all perform great. My personal cars run treadstone a/a or ebay cxracing 1000+hp w/a intercoolers.
You also do not know if you have any boost leaks because you "looked" at the couplers....
I would not use this thread to pass judgment on any ebay intercoolers. I have used many and they all perform great. My personal cars run treadstone a/a or ebay cxracing 1000+hp w/a intercoolers.
at low rpms, I measure 0.8bar in manifold and at the turbo (well, unnoticeably less maybe in the menifold), then difference starts to grow as rpms (and cfm) grow.How would this be possible if I had boost leak?
Also, in my 8 years of messing with turbo cars I never had boost LEAK - when smth. goes, pipes are blown off completely. Not like they are blown away at 0.6bar, and on the next run they again hold 0.8bar until revs get past 5000
06-18-2010, 09:08 PM
#53
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In my 6 months of turbo experience, Ive had loose couplers that would rob me of more than a couple psi of boost. Ive also had exhaust leaks do the same. Yes, it can cause you to lose boost beyond X amount of boost because its not flowing as much through the piping. The more air present, the more air that can leak. Have you even checked your couplers or pressure tested anything?
06-19-2010, 07:54 PM
#54
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You also said you are seeing knock which is going to pull timing and rob you of horsepower. You have built this car yet have no clue on where a good vac. source is?
I'd almost like to think this is some sort of joke.
I'd almost like to think this is some sort of joke.
06-22-2010, 08:18 AM
#57
given the numbers you said you made before and after, i say its a pressure drop from the IC. depending on the IC and how much piping you have, you can have anywhere from a .2 psi drop to 2 psi. simply measure boost at the manifold and up the boost a little. but, to be safe, test for leaks first.... shouldn't take you too long.
07-05-2010, 03:32 AM
#58
Found the IC I got - it's this one from SS Autochrome:
http://www.ssautochrome.com/prod.itml/icOid/1777
http://www.ssautochrome.com/prod.itml/icOid/1777
07-10-2010, 02:03 PM
#59
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I got my new IC installed today. I was amazed at the difference, here's a link -. http://www.camaroz28.com/forums/showthread.php?t=758449
I also made a vacuum source before and after the IC and hooked the boost gauge to it. On the old IC 7psi @5500 at the inlet and 2psi@5500 at the outlet. After i get the bumper back on, i'm going see what happens with the new IC.
I also made a vacuum source before and after the IC and hooked the boost gauge to it. On the old IC 7psi @5500 at the inlet and 2psi@5500 at the outlet. After i get the bumper back on, i'm going see what happens with the new IC.