timg

This is an old, but good read. Dynojets can be just as inaccurate as any other dyno. All dynos rely on trained personnel and up-to-date calibration.
http://www.turbomagazine.com/tech/03...h/viewall.html


With that said, there is a good reason why OEMs use load bearing dynos like Superflow, Dynapack, Mustang, Rototest, and Mainline Dynolog.

Tim

neoleooo

I think riceball777 is not concern about the difference in HP reading but more concern about the difference in air fuel reading. Shouldn't the air fuel reading be the same with all dynos?

timg

It should be, but it isn't. Different widebands read differently, especially if the sensor is old or it wasn't calibrated properly. That's the downside to cheap consumer-grade widebands. There are very accurate widebands out there, but they tend to cost orders of magnitude more than the ones we (and most dyno shops) use.

Tim

camuman

Interesting. Churches dynapack always read high relative to other dynos. Nice to see it back to back. But In the end the delta is what matters.

s2000Junky

I gladly trust my simple AEM wideband to be more accurate and reliable to tune with. It only sees my car on a day to day basis and I know when it isn't reading right anymore and a new sensor needs to be had, which is typically about ever 2 years for me.

Thunder-rush

If I was you I will go back to the dynojet and put a bit more fuel on the values and test if the power climbs with added fuel or drops just to have peace of mind. If it does go up, I will just retune if it drops you're probably fine. The thing is that the the dynojet graph you posted still looks choppy even with a smoothing of 5 and that raises a flag for me. Anyways by testing you are not going to loose your current tune if you save it.

indi00

I run two wide bands. One is the AEM connected to the AEM EMS, and one is a stand alone innovative LM-1. If these two don't agree then there is a problem.

The tuning process is dependent on the accuracy of the wide band, why skimp out on it.

sohc_mshue

Likely the dynojet wideband is off. Usually when I see widebands start to fail they will show lean spikes. Just try another one for piece of mind.

neoleooo

I gladly trust my simple AEM wideband to be more accurate and reliable to tune with. It only sees my car on a day to day basis and I know when it isn't reading right anymore and a new sensor needs to be had, which is typically about ever 2 years for me.
[/quote]
Sorry for the nub question but i'm using E85 and was planning to get the AEM wideband. I was wondering how it would read on E85?

Corey Maurer

It will read 28 points higher