Agreed... I thought when you had told me you said it was the same dyno. Dynojet to Dynojet can vary as different tuners use different correction factors. If it bothers you that much throw the stock intake and tb back on and do a few pulls. If you dont have one you can borrow mine. Also, Joe has ported 5.3L heads that raise compression so you can't compare them to your stock 241 heads.