Dyno Comparison Text: DBX VS PMAS MAF

I have the opportunity to test out 2 meters in the past few months. The first dyno test was done w/ the DBX 97MM Mass air meter back on May 2ed. This Saturday Aug 8th I'll be going back for a re tune on the dyno but with a PMAS 95MM Velocity mass air meter. Same dyno, no other new mods at all.

Shortly after the May dyno tune ( Put down 333RWHP ) the DBX meter went bad on me. Took 6 weeks of chasing problems to finally figure out that it was the meter.

The PMAS 95MM Velocity meter came from Brown Santa today. I hooked it up and took the car out for a spin and the seat of the pants meter went off the chart!!! I cant belive how hard it pulled, I could not keep the rear tires planted w/ the Nitto DR's. I dont think the Cobra has ever pulled this hard before.

Conclusion: I think the DBX meter was going bad for quite awhile, even for the dyno tune so I dont think the 333 RWHP truly represents what the car has w/ the mods b/c it pulled like a raped ape tonight. It will be interesting to see the outcome this Saturday but I'll be highly surprised if it does not pull more this time around.



VS:

Looking forward to results... where in Maine do you dyno??

Adam

Unless its back to back, its not that great of comparison using dynos 3months apart and like u said, the old meter was probably on its way out.


It'll be interesting none the less, keep us posted.

not exactly an old meter. it was less then 1 yr since I bought it

Its as close as it can get the only difference is the temperature and that would be in favor of the DBX meter b/c its much warmer now.

I dont I go to Concord N.H

so the Dbx was crap??


Another reason I'm going to speed density

Good luck to ya...What time you running??? If it's nice out I may take a fly up on the bike to watch...

Dont know yet but the dyno should tell if it was or not

Same time as before, 9 AM

Here are the results. The base timing was moved from 10* to 12*. Found a few more HP in it but the mid range is much stronger and its still pulling hard all the way to redline.

I have a question

You say the timing was moved from 10 to 12

Are you tuning with a chip
or
Are you just using the dizzy and afpr to change the pressure

Grady

he said base timing so I'm sure that was with the dizzy, advancing the global timing by 2

just moved the dizzy and its tuned w/ a SCT Chip



The question is to is the improved power through the RPM range due to just moving the timing from 10* to 12* or did maybe something to do w/ the difference in meters? At 3,500 RPM Im pulling 100 more RWHP and TQ between the two runs