Forge BPV Group Buy #2!!!
03-14-2011, 10:58 PM
#477
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03-15-2011, 02:55 PM
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03-15-2011, 08:57 PM
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Installed it today. I HP tuned my car to 22psi, so I installed the yellow spring. However, I suspect it is leaking boost because I can hear a very loud and shrill whistle when in boost above 18 psi that didn't exist before. I need to try adding a washer to see if it makes a difference. I have a modified airbox snorkel, K&N drop-in filter, and all else is stock. It does seem a little louder when releasing part-throttle, mid-rpm, medium boost... Otherwise it sounds stock, which is fine by me.
Last edited by ttypecamaro; 03-16-2011 at 08:18 PM. Reason: spi = psi
03-16-2011, 01:42 AM
#482
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Installed mine today! Thanks for getting this done gdubs! Everybody remember to put your o-ring gasket on the BPV! I forgot mine today and re-installed everything and had to take EVERYTHING back out!
03-16-2011, 12:29 PM
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I don't remember having a separate O ring... Did I mess something up???
03-16-2011, 12:32 PM
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03-17-2011, 03:35 PM
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All tunes are going to spike higher than where they settle. Some even spike to 24 and settle on 18 at the end of the powerband.... its the turbo running out of breath. People are spiking higher and settling higher with this BPV because their wastegate tables were maxed on a leaky BPV. Now since they have a working BPV, its bolting the demanded air loads. A retune will be sufficient, but yes spiking and settling is normal through the midrange. And yea spiking at 25 and settling at 22 is a good thing.
03-17-2011, 06:25 PM
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if it was holding 25 PSI, that is 1 PSI about its efficiency range. (that would be a bad thing) Heat does not come from back pressure.... Heat comes from the turbo doing work. If you have no cats back pressure isn't much of an issue. My coupe spikes to 26PSI and holds over 20. I also have IAT's 2 degrees above ambient at a 120MPH. So a lil PSI spike doesn't seem to bother my motor.
03-18-2011, 06:52 AM
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For some reason the picture that Modern Performance has posted doesn't look the same as what I've seen others post?
Picture from Modern Performance's Website:
Picture from Forge's Website:
Why the difference in the nipple/connector thingy?
Picture from Modern Performance's Website:
Picture from Forge's Website:
Why the difference in the nipple/connector thingy?
