100% stock '99 ACR dyno w/air & fuel ratios

[VENM8R]

100% stock \'99 ACR dyno w/air & fuel ratios

These are the best I can load them up at. The dynojet program does not have any provisions for saving to file. Anyone know a way around that? I printed to file and used Corel 10.
(I forgot to add: These are SAE corrected and all 3 runs there wasn't a fan used. I hope that would be the reason the power & torque went down on each successive run).

Is the air/fuel ratio typical of this model?


GPII

 

[Jason Heffner]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

What were the engine temperature differences between these runs? It looks like it may be running a little rich in the higher rpms but it doesn't seem to have hurt power any. Good numbers!

 

[VENM8R]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

Jason, this the first dyno I had done in years and I thought they were recording that type info; but I never received any if they did (I do know that the motor was running hot).
I would have liked that info to compare for when I get the Roe Supercharger installed.

 

[Jason Heffner]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

Well, you've got some good numbers to start with. Be sure and let us know how it turns out.

 

[Sean Roe]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

Sure starts out lean at the beginning of the run. Doesn't even get to 14.0:1 (which is still quite lean for full throttle) until 3,500 rpm. Was that measured after the cat? That's leaner than most I've seen. Might want to put a new fuel filter on it before you install the Supercharger.

Sean

<FONT COLOR="#ff0000" SIZE="1" FACE="Verdana, Arial">This message has been edited by Sean Roe on 11-21-2002 at 05:57 AM</font>

 

[Jack B]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

To export the Dynojet graph - call up the pulls then right click on the graph area. It give you a choice of bitmap or meta file.

Make sure he uses a wideband sensor and install it in the forward O2 well - you will see a diff. Print the data chart and if he had a coolant temp probe you will see a correlation in the hp and coolant temp. The fan only impacts the hp as far as dropping the coolant temp between runs.

 

[VENM8R]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

Sean Roe:
"Sure starts out lean at the beginning of the run. Doesn't even get to 14.0:1 (which is still quite lean for full throttle) until 3,500 rpm. Was that measured after the cat? That's leaner than most I've seen. Might want to put a new fuel filter on it before you install the Supercharger".
Sean

Yes, I believe that it was measured from the tailpipe (there was a device placed into it). Thanks, I will look for a new fuel filter Sean! GPII


I'll try that Jack B, Thanks for the info! GPII

 

[Sean Roe]

Re: 100% stock \'99 ACR dyno w/air & fuel ratios

Measuring the air / fuel ratio after it has pased through a catalytic converter will give you a leaner reading.

Sean