Low dyno numbers

[colin450]

So I just went and had my car dynoed today and the numbers seem really low for what I have done. The best my car did was 491/489. I have the JLT/Evo stage 2. I don't have a way of getting the graph on the computer so I'll give all the info I can. ***DYNO GRAPH ADDED***
95.29*F
29.67 in-Hg
Humidity: 39%
Anyone have any ideas what the problem could be?

 

[mds370]

Your dyno sheet would help, but since you can't post it we would need to know a couple of things .

1) what octane is the tune set for ?
2) what kind of Dyno was used ?
3) what did your a/f look like ?

 

[poopeater]

are those SAE corrected numbers?

 

[07Snake]

did you let it cool down before you put it on the dyno? lower numbers could be a combo of heat soak and that 95 degree air temp doesn't help any, along with it being a boxed tune.

 

[chuckstang]

Where did you go in MA?

I will only go to Pete up in NH, performance dyno

 

[harley99fb]

So I just went and had my car dynoed today and the numbers seem really low for what I have done. The best my car did was 491/489. I have the JLT/Evo stage 2. I don't have a way of getting the graph on the computer so I'll give all the info I can.
95.29*F
29.67 in-Hg
Humidity: 39%
Anyone have any ideas what the problem could be?

Have you contacted Evo about your results. If so, what was their response. Several others are getting similar results as you.

 

[colin450]

bump for dyno graph

 

[chuckstang]

wow
Im no expert but your A/F ratio looks wack!
Way too rich
correct me if I am wrong

 

[Quadcammer]

wow
Im no expert but your A/F ratio looks wack!
Way too rich
correct me if I am wrong

does not look that way to me.

Seems to hold right around 11.5 until it trails to about 12.0 at redline.

however, it could be funky with no smoothing on.

 

[VNMOUS1]

491 isn't that far out of whack at high temps. I've lost 20-35 rwhp between pulls. As low as 510 on a warm...not hot day, and I have a 2.6, JLT and had an Evo tune at the time (93 octane). If you drove it there and threw it on the rollers, it's realistic.


bj