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Topic Review (Newest First)
02-24-2009 08:59 PM
A forge diverter valve will not outperfom a good bosch

Ift he stock bosch is stock & does not have a damged diaphram it will work as good as a $100 forge or other part. This even uncludes tuner applications up to 22 lbs of boost. The only disputed part is if the after market part has a longer life expectancy than the bosch. My stage 4 9-5 works great with the stock bosch part ( though I chack it very 6 monthis or so). Bling and estethics are excluded .. that is owner preference.
02-08-2009 09:15 PM
Mr. D
Originally Posted by rafal View Post
^ did you get any other mods? ecu, dp?
No ecu yet, but dp, air and turbo intake.
02-08-2009 08:31 PM
rafal ^ did you get any other mods? ecu, dp?
02-08-2009 08:14 PM
Mr. D I didnt notice any sound change or performance gains between the two, but i do agree it looks nice under the hood.
02-08-2009 06:47 PM
Dudethe9-5isfast I found some posts that the forge diverter valve sometimes sticks.
The pressure buildup damages the throttlebody. I had a forge on my car & saw no increase in performance so I went back to non-defective stock for safety reasons.
02-08-2009 10:32 AM
Cambiocorsa I replaced my completely ruined Bosch valve with the Forge 007 valve. It made a big difference in spool up and performance, but only really because the original was destroyed. With the tune, it holds boost very well and releases VERY fast. On stock software I actually found the Forge valve slightly quieter than the stock diverter, but on 15lbs of boost it is as loud as most atmospheric BOVs. PSSSCHHHH!!!
02-08-2009 06:21 AM
rafal there we go. Thats what i wanted to hear. I just hope that its much different from what i have now oai+bosch.
02-08-2009 06:08 AM
Redfoxx GS intake + Forge diverter valve = sexy turbo noise!
02-08-2009 05:24 AM
codesplice n00bs.

more sound == more performance.

Why do you think a grapefruiter-launcher is the first addition in any serious Honduh mod?
02-08-2009 05:11 AM
rafal what about sound? K10sh0rty says he has more satisfaction with the sound but maybe he is just trying to justify the money he spent on it, lol.
02-07-2009 11:44 PM
JK They do hold better, but a proper non-leaking OEM bypass valve will offer no less performance than a forge valve. Anyone who says anything about more power from an upgrade BPV versus a fully functuion stock one is under some sort of placebo effect or is wanting to justify the money they spent on a performance level.

What does a bypass valve or blow-off valve do? It vents charge air after you take your foot off the gas and the throttle plate closes. So, unless your normal valve is malfunctioning there is no increase in performance.
02-07-2009 11:18 PM
Aero02 I replaced mine just because the stock one was shot. Figured why replace it with a part that can break again? The Forge one will last the lifetime of the car, just needs to be cleaned occasionally and maybe a new spring way down the line.

Supposedly they hold boost better, especially for tuned cars. I have no idea. I mean, logically you would assume so just based on the design differences... but what the hell do I know?
02-07-2009 08:28 PM
rafal just to add to this thread.

so what's the word about the aftermarket diverter valve? there are so many of you guys who swapped bosch to forge or hyperboost. does it make any difference? sound/performance?
01-30-2009 06:33 PM
christian900se If you want sound, get an intake from GS and then you will hear it. The turbo spooling and BOV woosh on my ng900 is awesome.
01-29-2009 11:37 PM
lekonna i guess if you guys want silly-noises from the by-pass you could move the valve closer to the
intake pipe and change the filter to a freeflow model.

so attach the by-pass right after the maf and the filter right before the maf. Performance-vise this will propably suck or make no difference what so ever but hey, who am i to judge.
01-29-2009 07:53 PM
dcr99vig yeah put mine in and the noise is not much diff. its shiny tho
01-29-2009 06:26 PM
PhillyAero ^^lol...what he said! bling bling
01-29-2009 05:24 PM
Gobes It holds boost much better than the stock valve and it adds some bling under your hood.
01-29-2009 05:22 PM
Forge Diverter Valve

So is the forge diverter valve really make much a difference in sound or no? JUst wonderin and it doesn't make ur car run rich or anything right shouldn't mess anything up?

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