Reality of a Dyno Tune>>>>> Stock ECU vs Hypertech vs UpRev

[RED_DET]

Yesterday I had the opportunity to get some dyno tuning done and see a comparison of Stock ECU, Hyper-Tech and UpRev Tune.

The car is our shop car, a 2004 6 speed G35 Sedan with the following modifications for engine performance. Motordyne 5/16 basic plenum spacer, R2C Intake, G37 OEM Y Pipe, G35 Coupe OEM mid pipe and HKS Axle Back Exhaust.

The dyno graph will speak for it self and peak WHP for the stock ECU was 210, the Hyper Tech peak WHP was 213 and the UpRev Tune peak WHP was 218. But to put things into perspective a bit more I will add my take on the matter. As you can see from the A/F ratio, the stock ECU is not able to compensate for the minor modifications done to the car and dangerously lean with A/F ratio a 15:1 at some points. The Hyper Tech unit did its best for an out of the box tune to correct the A/F back into the safe zone, but still limited. The UpRev Tune really brought this car to life, not only from a peak HP # difference, but overall picture. As you can see in the mid range area, the UpRev Tune is making 10+ WHP over the Hyper-Tech and 20+ WHP over the Stock ECU and the A/F is dead on and you can also see the difference in torque as well. The UpRev tune has yielded better partial throttle drive feel and fuel economy because steadystate drivability areas of the map were able to be tuned. Separately from driveability, the UpRev also allowed us to tune full throttle and power areas of the map, including the fuel, ignition and cam timing maps. Initial impressions from driving the car afterwards is that it feels faster, the power delivery is very linear because of the new mapping.

So in conclusion, if you are going to spend your hard earned money on Intakes, Exhausts and High Flow Cats, spend the little extra insurance on extracting all the power possible from those modifications with a dyno-tune and to buy yourself some insurance on not destroying anything in the process.

I would like to thank the guys over at Dynosty and Hal the tuner behind the results.

Dyno used was a Dyno-Dynamics which read approximately 12% lower than a dyno jet.

[frapjap]

Wow, I didn't expect the ECU to correct for mods very well, but really didn't expect it to do nothing at all. I always had the premonition that they could 'learn' at least a little like they do when you put lower grade fuel into the tank.

I'd like to see a stock car dyno and AFR to see if it is as efficient as the tuner made the two programs look.

[WDRacing]

It's my understanding that unless the ecu utilizes a wideband O2 sensor, it can't really compensate for much of anything.

The one thing I notice in the dyno graphs is that rock solid torque curve. That's impressive.

[float_6969]

Yea, those torque curves look great. The issue with the stock ECU, is that although it's able to account for the extra air being inducted into the motor, it DOESN'T know what the conditions are that got that extra air in there. This usually equates to AFR's and ignition timing being less than ideal.