Originally Posted by
mwalst
Mods: CAI, long tube headers, 100 cell high flow cats, x-pipe, borla ataks.
Hello,
I was thinking of possibly receiving a new tune as the tune I have now could possibly be incomplete/wrong. I received a tune from Stage 1 Auto in NJ, and showed my buddy the dyno data and he said this shop is clueless. These were the things I was told:
1. "The dyno isn't calibrated as power is falling off below 5500rpm. Most concerning are the AFR's in high 13's, under load engine's a ticking time bomb. Should be in high 12's, Stoich is 14.07 for US 10% ethanol"
2. "It probably is revving to limiter but the obv is probably not plugged in so the dyno is going off wheel speed and converting to rpm"
3. "This shop doesn't know coyotes if they didn't rev it out to at least 7500"
4. "After looking at the dyno data, I'd say it wasn't calibrated properly so power figures are probably off"
5. "The rpm isn't calibrated or it's calculating rpm based on wheel/hub speed. It's peaking then dropping off in the last two runs. It's running lean as hell and a ticking time bomb"
Obviously, these are concerning to hear after spending money on a shop that specializes in Ford/Chevy. People with the exact mods I have are doing 410-430hp at the wheels so something doesn't add up. Are these claims correct based on the data I have attached below?
FYI: "Hi-Rise" intake was a boss 302 that was replaced back to stock. They also used a hub dyno.
I would greatly appreciate any advice for this shop to maybe adjust the tune or on a new tune with your company. I have an sct device currently.
Thank you,
Mark