what are my options beside the ati race one. what about running 2 bosch bypass valves? ive also seen the turboXS type RFL is changeable to bypass, im just trying to find a cheaper option as i blew a ton on the F1A and im trying to conserve a bit of money.

 

I run two (2) Bosch style type bypass valves. Fabricated a bypass tube for mounting. They work good. I think I purchased them from evolution motor sports in Az. I have tried an HKS SSQV valve. The SSQV holds the boost longer and will not bleed as quickly. But, more cost. So, I will modify the valves a bit. There is no spring adjustment on the vac side of the valve. I will machine spring shims to do this after running some calculations. App... 97ss 383ci D1 7.6-->3.4"pd pulley. HTH B.

 

I'm using a Mondo valve I bought from summit. Its a very high quality piece. I connected a small silencer made out of pvc and fiberglass to the overflow air to quiet down the F1A. With an ATI race bypass this is not an option.