what did you guys set your map to for these monsters. When I hit about 3-4 psi and 3500 rpms it is like slamming into a brick wall. I've logged the event and it happens right as the secondary flag goes to true. my setup is below

87 t2 w/ rebuilt streetport by Kevin Landers (rotaryresurrection)
Rtek 2.1
550cc primary / 1600cc secondary
BNR stage 2
walboro 255

 

use the 550/720 preset.. and i believe i had another 25% taken out at 6+psi, above staging rpm. this is with 750 primaries, and it would still stumble sometimes in 1st gear, but higher gears would run alright

 

so take out 25% from 6psi and above out to 8k?

 

yeah whatever your correction was at 6psi and above, take out at least 25%. Also above your staging RPM. If your staging is 3500 rpm, then only take out 25% above that, and 6psi and above. below 3500 rpm at any boost would stay the same

 

alright cool. I'll give that a try. Yeah when it hits the secondaries it just stops revving up and pops and backfires.