Quote:
Originally Posted by VelocityC6
Depends, the stock 9b turbos are tiny and don't hold 16psi to redline. If the rest of the car is stock ie: fuel injectors/no ECU tune he'll be maxing out the stock fuel system and doing two things, overboosting the stock turbos shortening their life and 2) detonation will occur which as everyone knows spells disaster for a FI car. The stock fuel pump is also "maxed out" with the factory boost setting and would need an upgrade to run reliably at higher then stock boost settings.
I limited my VR4 to 14.5 till I upgraded the fuel system.....that led to bigger turbos, downpipe, etc etc etc..!!
Back when I had a VR4 ALOT of people were testing the limits and that led to learning what not to do. I played it safe. IMO he can hit 12's with a great launch, but 16psi will only be seen for a second and drop off quickly.
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Agreed! I had a '96 VR-4 with a boost controller, BOV, Intake, some exhaust work, and a good driver
, and that was a mid-high 12 second car. But I would NOT go over 14.5 psi on stock injectors. I would keep it at 14 to play it safe and plan for spikes. Velocity is dead on about boost and the fuel system.
I too was around in those experimenting days and learned a lot from what was being tried.