352 HP & 342 TQ on a Mustang Dyno. No power adder mods. Happy with the numbers.

 

Not too shabby. What transmission? And power mods planned?

 

MT82 so far it's been good to me. Planned mods are long tube headers, O/R H

 

I just got the following explanation from another forum and called the shop and they verified the info given to me. My car was indeed ran in 3rd gear and since it’s a Mustang Dyno it does not matter what gear your in unlike a Dynojet.

“the reason for the dyno in the 1:1 gear ratio is due to the Dynojet. Dynojet mathematically creates a horsepower number based on mass (which is the known weight of the rollers) and accleration (how fast the car is accelerating the known weight).

F=ma

From force (F), we can calculate horsepower.

Dyno the car in 2nd gear, and acceleration (a) goes way up, causing force (F) to go way up.

So by dynoing the car in the gear closest to the 1:1 gear ratio, we eliminate any acceleration advantage or disadvantage caused by the transmission, which gives us unskewed whp numbers (even though Dynojet has a fudge factor in there which makes them skewed anyways and read high).

As for other dynos out there (i.e. Mustang and Dyno Dynamics) - they use a load cell to measure roll force (the amount of force the tire is placing on the roller). Based on roll force and the radius arm going to the load cell, we get roll torque. Based on roll torque and roll speed, we can get vehicle horsepower. Vehicle horsepower and vehicle RPM gives vehicle torque. It doesn't matter what gear you run in on load cell style dynos as they are measuring force, not acceleration. Force does not change from gear to gear.”

 

Hmmm... I thought it was a little low for being a manual, that's what most autos usually are stock,

 

Remember, this is a Mustang dyno, which always reads lower then the DynoJet many shops use. For a bone stock car, these are really, really strong numbers for a Mustang dyno, considering most stock 5.0's put down 360-380 on a DynoJet.

 

Yeah I was seeing 370+ stock and have even seen 400+ with tune, intake and exhaust. 350 sounds a little low.

 

I seen a 11 with axle backs, intake and tune push out 430hp going to 7k RPMs.. And that was on a mustang Dyno

 

I agree but most those are off a Dynojet which always reads higher.

 

Mustang dyno's make it easy to "play with" in order to get the number you want. The power figure you've described is higher than many see with long tubes/full exhaust, and I'd bet money the dyno wasn't calibrated properly.

Nonetheless, all of this talk is absolutely worthless, as none of it matters. The only thing that matters is power gains, not baseline, and track numbers.

 

Don't get caught up in dyno racing. Use it to dial in your mods and to see what is working for your car and what's not. I've seen lower HP cars on a dyno faster in the 1/4 and 1/8. So use it as a tool for your own car and not a comparison to someone else's.

 

It all depends on your Dyno. In a dynojet my car hit 358rwhp stock, same Dyno it hit 420whp/395wtq after adding long tubes, OR xpipe, Steeda CAI and 93 tune. Similar conditions on both runs and those were corrected numbers with the hood down.