guys,
Per my modds below:
- intake
- hks 272/272 cams
- hallman mbc @21lbs
- hks bov
- turbo back w/ 3" magnaflow cat + 3" core louvored resonator
- custom flash

the dynojet max pwr was 299whp. I was expecting 330whp or so, a little disappointed but nevertheless an improvement. I should have base dynoed but never did.

So, my question is what is the variable that we're missing here? The tuner blamed back pressure of the cat. But I expected no more than 10whp from it so can a resonator account for more?

Exhaust has been rigged to replace the 2.5" neck w/ 3" and replaced smaller 2" core w/ 3" core resonator. Before the tune, hiflow cat felt way better than stock cat. So, I'm having hard time believing that it would cause 30whp!

Keep in mind this is w/ 272 cams and custom tune...any insights to this? thx