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ladsm.com :: View topic - No boost?
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No boost?
http://www.ladsm.com/forum/viewtopic.php?f=5&t=8448		 Page 1 of 3
Author:  Havoc [ Wed Mar 04, 2009 5:26 pm ]
Post subject:  No boost?
I finally got everything hooked up last night everything looks good but I am not getting any boost, I can rev up to like 6500 and i get like maybe 1 pound of boost, I took off the intake again today and there's no play on the turbo only a bit side to side but that's it, its not my mbc because i took it off the wastegate and still got no boost, i doubt i have a boost leak, and i don't think it would be that because id at least see some boost, but I have no compressor to be 100 percent sure, its a 60-1 turbo internally gated with a 2g mani and an evo 3 o2 housing if that matters, any help or suggestions would be appreciated here is a pic of what the setup looks like.

Image
Author:  Illeagle [ Wed Mar 04, 2009 5:48 pm ]
Post subject:  Re: No boost?
bad exhaust leak before the turbo.
Author:  Havoc [ Wed Mar 04, 2009 5:52 pm ]
Post subject:  Re: No boost?
that's what I was thinking.... gus helped me fix 2 of the studs that were messed up on the head, and I put a new gasket that I bought on dyno day, it doesn't sound like before but that MIGHT be it... although i tightened those bolts as good as i could.
Author:  Havoc [ Wed Mar 04, 2009 6:00 pm ]
Post subject:  Re: No boost?
forgot to say. it sounds like it still has an exhaust leak where the mani bolts to the head but i don't think its bad enough to cause me getting only like 2 psi its on there pretty good, any other suggestions? i will go down and try to tighten the bolts up some more when the engine cools a bit.
Author:  H8VTEC [ Wed Mar 04, 2009 7:05 pm ]
Post subject:  Re: No boost?
wastegate stuck open??

a leak before the turbo can actually make that big a difference.
Author:  Havoc [ Wed Mar 04, 2009 7:31 pm ]
Post subject:  Re: No boost?
yea that was another one of my thoughts, the car should be cool enough to touch now, I am gonna go try to tighten those bolts up some more, and I was also thinking it would be the wastegate, how would i be able to tell if its stuck on open or if its even opening?
Author:  clockworktoy [ Wed Mar 04, 2009 7:42 pm ]
Post subject:  Re: No boost?
If you can hear the leak its big enough to have an effect on boost. I had a minor leak that i couldn't hear at the mani/head and as soon as i fixed that i noticed my turbo spool 200-300rpm quicker. Like i told you its either an exhaust leak pre-turbo OR the hotside might be mismatched and isn't working correctly.
Author:  Havoc [ Wed Mar 04, 2009 7:44 pm ]
Post subject:  Re: No boost?
you have to really listen for it to hear it, and its not letting me get like any boost at all =[ and how would i know if the hotside is mismatched?
Author:  Illeagle [ Wed Mar 04, 2009 7:47 pm ]
Post subject:  Re: No boost?
mikey with his 50 trim had a exhaust leak and he couldnt make 5 psi. If your wastegate is stuck open you will get no boost, stuck closed = infinite boost.
Author:  Havoc [ Wed Mar 04, 2009 7:50 pm ]
Post subject:  Re: No boost?
alright imma go mess with it and see whats up, thanks for all the help as usual guys, ill post back in a bit.
Author:  1fast2G [ Wed Mar 04, 2009 10:21 pm ]
Post subject:  Re: No boost?
You should also do a boost leak test too.
Author:  Havoc [ Wed Mar 04, 2009 10:42 pm ]
Post subject:  Re: No boost?
yea i didn't end up having time to do it tonight, I will be doing it tomorrow though I will check the wastgate, tighten up the manifold bolts some more and do a boost leak test as well, ill post up results tomorrow.
Author:  4GRIDER [ Thu Mar 05, 2009 6:16 pm ]
Post subject:  Re: No boost?
Make sure u have no cracks in your o2 housing & manifold..My friend had same problem no boost due 2 a bad crack underneath the ex manifold.
Author:  Havoc [ Thu Mar 05, 2009 8:07 pm ]
Post subject:  Re: No boost?
so me and Hugo found 2 huge boost leaks on the car and fixed those, there is another one that i suspect but was not able to check since i couldn't cover the inlet of the turbo to test it i ordered a new coupler to hopefully fix that, the car idles much better but still not seeing boost only like 3 psi I am hoping its leaking where im thinking its from, the wastegate opens and closes perfectly so it isn't that, and on a different note I think my clutch is going out =[ its hard at times to get into gear, it feels as if i don't have the pedal pressed in all the way but i actually do, so it seems i might need to do a clucth change... :(
Author:  grouch [ Thu Mar 05, 2009 11:15 pm ]
Post subject:  Re: No boost?
i had a problem liek that before. i checked everywhere for boost leaks and nothing it ended up being my cars timing slipped. did you mess with anyhting over by the belt? i was pulling and prying off my broken timing cover and it slipped some how
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