https://www.rx7club.com/rtek-forum-168/15-psi-rtek-2-1-a-956480/

You're welcome.

thanks man this is very helpful!

Guess you can go a bit beyond but as long as the AFM is not maxed out. I don't see any reason to go beyond 15 psi though. Have you even ran @ 12-13 psi? My TII w/a Super-V hybrid pulls like a freight train! And that's from an engine that's a bit tired. With the BNR #4, the AFM might just be near maxed out before peak RPM @ 15 psi. Why take a chance of popping an apex? You have potential for near 400 whp @ <15 psi. Doubt the wastegate can handle more hp beyond that.

ive ran previously at 17psi and it pulled great but that was for a very short time. i have the rear housing being replaced due to the typical s4 crack by the dowel pin. so here within the next week hopefully i will have her back together. i will keep you guys posted as how it goes with the rtek. before all i had was a safc 2 and a wideband. this will be the first time i have had something to control timing so im hoping it will run smoother. previously though i hit the dyno once and at 9.5-10psi was 301whp so im hoping to get 400whp

update* i now have the var back running with the rtek 2.1 and it is running great!! im currently just taking it easy to enjoy it lol. once i hit the dyno again ill let you guys know the numbers

Any updates? Engine still together?

Yes engine is still running great. Just had it tuned and did 339whp 259wtq. That's at 15psi. Wouldn't say I'm happy or mad. It pulls good just was expecting more. I'll be selling this whole setup in the near future to go with a Borg Warner s366 and stand alone.... bnr stage 4 and rtek 2.1