Choppy_Idle

Hey guys!

Was on the dyno today, result scared me, bec of losin 25hp and 50NM torque and have a break in torque at 4100rpm, what did the experts here think about, what can cause this?







Regards,
Ronald

necrocannibal

iTrader: (5)

I'm no expert but that torque "curve" looks strange all together as in it isn't a curve at all. What mods do you have? Is it tuned for those mods? Hopefully someone knowledgeable will chime in for you but I would guess tune is off. Did you have any type of wide band on it for the dyno?

SoFla01SSLookinstok

To me the graph doesn't look too bad. The drop at 4100 is only 4nm. If on another graph it would be less pronounced. After about 6200 it falls about 5ps to 6500.

Choppy_Idle

No tune or wide band, only Base numbers where to start with the mail order tune and then look after again on the dyno!

Ok about the graph, but why I'm lost 50NM at all?

Regards,
Ronald

necrocannibal

iTrader: (5)

Maybe different outside temps and/or humidity levels? Different dynos maybe? If nothing has changed on the car from one dyno time to the next that would be my guess.

jmilz28

iTrader: (13)

This is 340hp/365 ft lbs, pretty solid for a bolt on car. The curves look a little funny due to the scaling and the mixing of imperial and metric units but it's actually OK. That small dip in the HP curve could be anything, burp in fuel delivery, fart in the spark. Doesn't look major but I expect it's something fundamental, perhaps a tuning issue, hopefully not mechanical. All in all, not a bad baseline for a bolt on car that's not tuned.

Choppy_Idle

Thanks bro for your positive opinion, now car is tuned by LSX Power Tuning, a gain in 20HP/NM was realized, so that it is, what they have promised, i´m lucky, but unlucky about the missing tq to come to the oem specs?!

Now i´m on 361rwhp and 375 ft.lbs





Thoughts to become my whole tq back?

Regards,
Ronald

jmilz28

iTrader: (13)

Actually, now that your car is tuned, it looks quite strong for a bolt on car...ESPECIALLY the torque. I suspect it's due at least in part to your custom duals. No way to get too much better without $$$, like an intake (FAST, etc.) or getting into the valvetrain. I'd be really happy with what you've got, all things considered on this platform. Nice work!