I recently purchased a factory Bypass/ cut-off valve for my car and couldn't find it on my car?
Do the autobox 5kcst have diverter valves or not?
I know the 5spd does but I couldn't locate one on my auto turbo!
Does it help with spool up? On my Porsche 944 turbo it had a diverter valve instead of a blow-off valve, the factory Bosch valve has a rubber diaphram and is known to crack and cause boost issues, does the 5CSKT have a similiar device?
04-06-2005, 09:13 PM
There is no real point to a bpv on an auto since you don't lift between shifts. Lots of people put them on their manual 10-valvers. It doens't help with spool up, it just is much easier on the turbo when you shift if you are running more than stock boost levels. With out one when the throttle plat slams shut under full boost all the air backs up against the compressor and over time it can wear out the bearing, etc..
Thank you for the clarification, one more thing ,when should I start seeing boost in the rpm range? 2500? 3200? It seem's like I'm not getting any pressure till around 3200-3500 rpm!
Well I'm running around 1.7- 1.9 bar depending on outside temp.........I currently have a Intended Acceleration Stage 1 kit chip and spring, so whatever spring came with the kit!