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ladsm.com - View topic - No boost?
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No boost? 
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helmet polisher
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Joined: Sun Jul 15, 2007 2:49 pm
Posts: 1178
Post 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.

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Wed Mar 04, 2009 5:26 pm
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Talon of Doom
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Joined: Wed May 23, 2007 10:07 am
Posts: 3615
Location: Long Beach
Post Re: No boost?
bad exhaust leak before the turbo.

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Wed Mar 04, 2009 5:48 pm
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helmet polisher
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Post 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.


Wed Mar 04, 2009 5:52 pm
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helmet polisher
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Post 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.


Wed Mar 04, 2009 6:00 pm
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Quagmire
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Post Re: No boost?
wastegate stuck open??

a leak before the turbo can actually make that big a difference.

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Wed Mar 04, 2009 7:05 pm
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helmet polisher
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Post 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?


Wed Mar 04, 2009 7:31 pm
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Squish Face
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Joined: Tue May 22, 2007 7:08 pm
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Location: LBC
Post 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.


Wed Mar 04, 2009 7:42 pm
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helmet polisher
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Post 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?


Wed Mar 04, 2009 7:44 pm
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Talon of Doom
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Post 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.

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1/4 ET-11.657@121.18mph w/ 1.682 60'
445whp/427tq on RRE Dyno
All on 91 pump.

Do you need your car tooned? Got some extra cash? PM me for details. I offer street and dyno tunes

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Wed Mar 04, 2009 7:47 pm
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helmet polisher
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Post 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.


Wed Mar 04, 2009 7:50 pm
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Joined: Sun Jun 17, 2007 6:34 pm
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Post Re: No boost?
You should also do a boost leak test too.

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Wed Mar 04, 2009 10:21 pm
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helmet polisher
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Post 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.


Wed Mar 04, 2009 10:42 pm
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BANNED 4 LIFE!
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Post 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.

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Thu Mar 05, 2009 6:16 pm
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Post 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... :(


Thu Mar 05, 2009 8:07 pm
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Post 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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Thu Mar 05, 2009 11:15 pm
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