Whats wrong w/my dyno?

[HCCAFan]

I went and dyno'd my car and made a best of 248 horses and 314ft lbs. I was hoping for a lot closer to 300 horses and am looking for some insight into how I made so much torque compared to the HP. The guy at the dyno said it was just a free spin dyno and he didn't put a load on it which would have helped my numbers. I've never dyno'd before so I don't know what to think about that. It was a DynoJet and my mods are AGP WGA 21/16, AGP Fuel Return, QW FMIC, Maxxfab SEE and 3" O2 housing, NGK 4306s, MSD Wires, AEM Intake, PTP Check Valve, JMB Hard Pipes, 1st GEN DSM BOV, Map Clamp @ 4.15volts, UEGO, and that's about it performance wise. Here's a picture of the graph. He said it was fairly smooth. Anything you guys can tell me about how to get my power up? Is it true the car will dyno more with a load on the dyno wheel?

http://i108.photobucket.com/albums/n...y/P7250069.jpg

[HCCAFan]

Here's a better picture of the dyno print out.


http://i108.photobucket.com/albums/n...y/P7270074.jpg

[BMF_RACING]

Quote: Originally Posted by HCCAFan

Is it true the car will dyno more with a load on the dyno wheel?

the dynojet dynos always show about 10% to 15% higher hp #'s than the dynos that load the wheels ---> like a mustang dyno.

those numbers are a little low for dynojet. check for a boost leak. what are you holding psi at 6000rpm. less than 15 psi and its most likely a leak.

hope that helps,

[vegasDSM]

boost leak.....

and high ait's....

[vegasDSM]

boost leak.....

and high ait's....

[HCCAFan]

He said he was able to apply a load to the dyno which would have made him input stuff like vehicle weight and speed and what not but for whatever reason he did not do it. We leak tested it prior to going to the dyno and found nothing obvious. It would have to be a very small leak and it still holds 16 to redline.

The high AITs were making the computer not give it much timing advancement you think?

[TJ1376]

High IAT's and possible detonation at boost spike causing a reduction in timing.

Check the obvious stuff first, then get something to monitor your knock retard and timing.

TJ

PS. I can't view the graphs from work, so Im just basing this off what everyone else is saying.

[HCCAFan]

I'm no expert but in the graph it did not look like it was heading up and then dropping sharply as I figure it would if the car was pulling timing. The guy at the shop also said it did not look like timing was being pulled. The boost leak tester I used does not have a gauge on it to watch and see how long the pressure stays in the system so that may be the next step. Kinda sucks that IAT could keep me from making power with all that is out there to help with knock ie. methanol and high octane.