[s-cars] BPVs

[Trevor Frank]

One thing is for sure, personal experience and experience from others.
The 710X valves, I believe the N is superceded already, will with great
probability blow there diaphragm and if you are lucky nothing will
happen, except no boost.  If you aren't you will lose a turbo, not so
cheap anymore.  I don't know if this is true with the Motor sports Bosch
valve though.  Notice Hoppen and MTM no longer recommend the 710X valves
for High HP applications.

Personally I have never seen a performance improvement with a bpv.
Aftermarket ones need to be set up properly and the bosch ones seem to
work fine until they explode into you intake tract.

-----Original Message-----
From: Krasusky Paul (WQQ2PXK) [mailto:pkrasusky at ups.com]
Sent: Monday, June 23, 2003 9:03 AM
To: s-car-list
Subject: [s-cars] BPVs


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Various people dug up from yesteryear:


From: Djdawson2 at aol.com
Date: Sun, 22 Jun 2003 23:06:11 EDT
Subject: Re: [s-cars] Bypass valve questions
To: HoosierMP at aol.com, rpastore at animalfeeds.com,
	smarinello at charter.net, quattro20v at telus.net,
s-car-list at audifans.com

<Everybody has an opinion on BPV's, the 710N is a pretty good value for
approx. $30.00.>


Define value.  Personally, I think the valve stinks.  One of the 2 I
bought (one for me and one for a buddy), passes all pressure/vacuum
tests.  It still falls off dramatically between gears, and seems to be
stealing some of my top end... compared to the original spec valve...
I'll be moving along to something that uses a piston. Dave in CO






I won't get into the whatBPVisbetterthanwhatBPV debate, but will add
this, if only to add to the information pool...

I replaced my 710A with a 710N when I got the car, a just in case as I
also did 1+ at same time.  I notice zero difference in feel / / /
performance / sound / etc. with the 'N' BPV.  It's been in now for over
a year and 25k+ miles.  Car performs fabulously, no lag, feels identical
to many friends cars with 'other' BPVs.

And, not that it matters but is sorta cool in a side-effect sorta way, I
personally much prefer the sound of these units over any of the others
I've heard.  Don't much care for their sound, dig mine.

-Paul
CT Rainforest
'95 //S6 710N until it blows or I ingest it through the turbo '58 TR3A
I'd be better to have an Ark as a 2nd car at this point
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