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1g blow off valve on my Buick
I have a 1987 grand national with injectors, downpipe and some other mods. I have a 1g eagle talon blow off valve welded to my up pipe that does not want to blow off when it should. Where does the line coming from the blow off valve go? and what would be some reasons it wouldn't be working.
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Re: 1g blow off valve on my Buick
to a good vaccum source
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#3
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Re: 1g blow off valve on my Buick
Quote:
- Manifold, behind the throttle plate - Turbo outlet (essentially, where it is mounted) - Turbo inlet The blow off valve measures differences in pressure and releases boost build up. So I'd want to measure an area that would lack pressure on closed throttle and an area that would still have high pressure immediately after closed throttle. Does this valve have two inputs, or rely on where it is mounted for the second one? BTW, I don't feel blow off valves are necessary or of any value on these cars. Read the past messages on this area and see people's bad experiences with them. These aren't manual transmission cars, so they aren't needed for boost reduction during shifts. And if you want it for the cool noise, you bought the wrong car entirely; you need a Honda with a 5" muffler tip.
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Scott Keller - GNTTYPE Founder & Moderator
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Re: 1g blow off valve on my Buick
i also have to agree with Scott on this.. i ran several BOV's and found that they just caused me more problems then they helped..
Do a search on BOV here and you see what we are talking about |
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Re: 1g blow off valve on my Buick
i use the factory bov for the puck on the exhaust housing and i have a 2001 subaru wrx bov in the up pipe and run the air back into the intake after the maf like the wrx so there is no turbo lag. found the bov for 10.00 on ebay a few years ago or if you have a vin of a wrx you can go to subaru and buy one, i dont know the dealer price as i dont have a vin od a wrx.
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84 gn / 87 engine .030 109 ballanced, gt51 25#, msd 50# inj, all billet mains, bms rods, ported heads, comp cams .459 lift, champion intake, precision fm, accufb 70mm tb, 340 fp hotwired, northern alum rad, b&m tranny cooler. all on 93 octane... |
#6
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Re: 1g blow off valve on my Buick
Quote:
Perhaps Buick knew best...
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Scott Keller - GNTTYPE Founder & Moderator
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#7
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Re: 1g blow off valve on my Buick
for what its worth here is a pic of one of the BOV's i used to run.
the greddy Type R |
#8
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Re: 1g blow off valve on my Buick
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#9
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Re: 1g blow off valve on my Buick
your car is probably making to much boost for the BOV too handle, a stock ecplise BOV isn't going to hold up to the higher pressures of the GN. I haven't found a stock bov that would hold over 12psi, my old Denso failed at a mere 10psi, anything over that would cause it to surge.
I do recomend the HKS SSQV, that thing does not leak at all! plus its adjustable from like 8 - 35 psi .02 hope it helps
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1989 Honda CRX Si Turbo 1986 Buick Regal T Type |
#10
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Re: 1g blow off valve on my Buick
nice info..
also noted.. the more boost you build with the HKS SSQV the tighter it seals.. Nice design and recomended if you gonna run a blow off valve. |
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