Dynamometer Results & Comparisons - Is this normal? opinions please.

386 rwhp/371 rwtq on a h/c/ls6 intake ls1. The car is a 95 pontiac trans am 6 speed with 410 gears. The Engine is a stock bottom end 99 ls1 with 400 miles on rebuild,old style patriot stage 2 heads,TR224 cam,comp cams truniun upgrade on stock rockers,Ls6 intake with stock 2001 ls1 injectors,85mm truck maf,k&n fipk,bbk 1 3/4 long tube headers,and magnaflow catback.The rear end in the car is not in the best of shape ,has a slight wine over 50 in high gear. Now everything ive read with other h/c/i setups power ranges were over 400 it just seems to me 386 is a little low for the setup.I haven't been able to drive the car much do to work, but the tune seems to be spot on. All was done on a 100 degree day on a dyno jet dyno by EPS. Any ideas? Opinions please.

Was the dyno through the catback. If so that's 15-20 rwhp. What compression ratio? Dyno graph?

Was the dyno through the catback. If so that's 15-20 rwhp. What compression ratio? Dyno graph?

I would think it would make over 400 through the catback.

Its was throught the catback. Compression is close to ls6 compression, maybe a point or two over due to heads being resurfaced.

sorry for cell pics,im out of town at the moment