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#1
11-12-2004, 01:46 PM
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Custom Exhaust manifolds
I am interested in turbocharging my 4.3L v6, I have extensive experience in turbocharging and I am aware of the problems encountered with insufficent fuel flow and higher compression ratios, though I am looking to see if any distributor has any pre-fabricated exhaust manifolds designed for turbocharger applications, and if not, if there is a market for such a set of manifolds. (yes I am the guy with the wiring problem) I am sure there are supercharger kits out there, though superchargers have their limitations and IMO aren't as versatile as turbochargers. I have just recently aquired this Blazer and there seems to be endless potential to this engine.
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#2
11-12-2004, 08:35 PM
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Re: Custom Exhaust manifolds
hahaha, you're digging yourself into quite an expensive pit right now, let me tell you that much. However, After driving around in my friends turbo civic @ 17psi, I'm convinced that it would be sweet, and that there would be serious power potential in the turbo 4.3. I'd be thrilled to cough up the ~7-8k for the proper job if I could ever afford it AND it made sense. The stock engine should be modded a bit, and the stock tranny thrown in the trash as far as I can tell. This guy turbonoma has been working onhis for years it seems, and I don't think it's near being done yet. I've been totalling up what it should cost for a proper job, and it's just an bucket of reciepts as far as I can tell.
Here are some pics that'll make you drool:  check out THESE exhaust manifolds!  yeah, this thing is awesome. 
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#4
11-12-2004, 08:50 PM
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Re: Custom Exhaust manifolds
I'd have to agree. While my buddy's turbo is sweet and fast, it is absolutely thrashing his car. He is having pressure leaks in the exhaust end all the time, and is burning oil bad. Needless to say, he has replaced his headgasket 3x in 5 months.
Superchargers seem more reliable, but how much boost can you really get out of say an intercooled vortech sc? I know this isn't really the right type of forum to ask these questions, but any opinions?
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#5
11-12-2004, 09:13 PM
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Re: Custom Exhaust manifolds
You can get up to 10-15psi with a different pulley but you will never go that high with a stock bottom end.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#6
11-13-2004, 05:01 AM
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Re: Custom Exhaust manifolds
From my experience burning oil and blown headgaskets are caused by two things, detonation (whatever the cause may be) and bad seals on the compressor side of the turbocharger. I really like that setup you posted, it looks nice. Well, if my project does happen to materialize I will keep you guys posted.
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#7
11-13-2004, 09:10 AM
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Re: Custom Exhaust manifolds
Hey if you have any know-how on turbo vtecs, take a look at this forum and give me some advice. My friends civic has a surging idle that revs up and down every second. I think he has no IACV and his vacuum hoses are messed up, but I posted a pic so you can give it a shot.
oh yeah, it was reallllly painful having to post in a civic forum.
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#8
11-13-2004, 12:25 PM
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Re: Custom Exhaust manifolds
o yeah the link is: http://www.automotiveforums.com/vbul...d.php?t=316234
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#9
11-15-2004, 01:17 PM
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Re: Custom Exhaust manifolds
Is there a maximum amount of pressure our MAF sensor will read? Say you were running at 12 psi, would our stock computer handle that kind of forced induction?
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