Diverter (Blow-Off, Bypass, etc) valve questions.

BigMouse · 07-20-2002, 09:09 PM

I've got my 1988 80 Quattro that I put the 3B engine from a '91 200 Quattro into. I am wondering what the advantages to an upgraded bypass valve are, and what you guys with tuned turbo cars would reccomend getting. I like the Forge valve, but the Hyperboost valves by Stratmosphere look good too. I've got the stock Bosch valve on now, and I belive it leaks pretty bad (it is original).

Any other good brands to look at?

http://www.stratmosphere.com/forge_valves.htm
http://www.stratmosphere.com/hyperboost.htm

skiddmark · 07-20-2002, 11:10 PM

I don't have a bypass valve on my 1990 200tq but I was thinking of getting one since I am chipped. But anyway I don't think you want to go with a "blow-off" valve that vents metered air with out reciculating it because it can cause you to run rich when it vents and you will get decreased performance, milage(sp?), ect.. As far as forge valves go I have heard good things about them on the s4 board, but I am no expert. Maybe someone else knows what are the best valves?

I bet your car really goes, is it chipped?

Alan George
1990 200tq

Tom Faust · 07-21-2002, 04:14 AM

Total cost is about $30.00 with the NAPA pressure switch. The pressure switch is adjustable for boost pressure. The "high-low boost switch" is something Gus originated to limit boost at the drags while staging and launching. He switches to high boost at 60 feet, after the tires are hooked. With 24 pounds, he was burning up his tires at launch. THe switch activates a solenoid on the wastegate and allows cut in of 2 additonal injectors. Since few have this, he explains setting up the BOV without it. There is a lot of short money turbo stuff at his site. It is MOPAR 2.2 - 2.5 liter specific. Gus is a grandfather now.

http://home.earthlink.net/~turbogus4...surerelief.jpg

BigMouse · 07-22-2002, 01:08 PM

07-20-2002, 11:10 PM	#2
skiddmark Junior Member Garage is empty, add now Join Date: Apr 2002 Posts: 1,042	Re: Diverter (Blow-Off, Bypass, etc) valve questions. I don't have a bypass valve on my 1990 200tq but I was thinking of getting one since I am chipped. But anyway I don't think you want to go with a "blow-off" valve that vents metered air with out reciculating it because it can cause you to run rich when it vents and you will get decreased performance, milage(sp?), ect.. As far as forge valves go I have heard good things about them on the s4 board, but I am no expert. Maybe someone else knows what are the best valves? I bet your car really goes, is it chipped? Alan George 1990 200tq __________________ ----------------- Alan 1990 200q (034efi Stage 1b) 1990 CQ (3B Swap in progress)

07-21-2002, 04:14 AM	#3
Tom Faust AudiWorld Super User Garage is empty, add now Join Date: Sep 2001 Posts: 2,136	Heres's a link to a short money BOV. Total cost is about $30.00 with the NAPA pressure switch. The pressure switch is adjustable for boost pressure. The "high-low boost switch" is something Gus originated to limit boost at the drags while staging and launching. He switches to high boost at 60 feet, after the tires are hooked. With 24 pounds, he was burning up his tires at launch. THe switch activates a solenoid on the wastegate and allows cut in of 2 additonal injectors. Since few have this, he explains setting up the BOV without it. There is a lot of short money turbo stuff at his site. It is MOPAR 2.2 - 2.5 liter specific. Gus is a grandfather now. http://home.earthlink.net/~turbogus4...surerelief.jpg

07-22-2002, 01:08 PM	#4
BigMouse AudiWorld Super User Garage is empty, add now Join Date: May 2001 Posts: 2,645	Yeah, the car is quick. Not chipped yet though, but will be getting a 2B chip soon. __________________ 1990 Audi Coupe Quattro (20vt running on Megasquirt) (GONE!) 1992 Audi 100cs Quattro Avant (Auto-2-Manual converted) (GONE!) 2001 A4q Sport 1.8T (RedRummy's) (GONE!) 1986 Audi 5000tq (GONE!) 1988 Audi 80 Quattro (GONE!) 1989 Audi 200tq (RedRummy's, GONE!)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Welcome to AudiWorld!
		Welcome to AudiWorld.com. You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join AudiWorld.com today!