n2ocamaro

I went to a local Mustang dyno yesterday and we could not get the car the register high than 125hp. There seemed to be no load applied. It only took 2 seconds to get from 3000 to 6500 rpm. From what I could see, the owner had all the parameters entered. The car is in my sig. It has a 3800 stall and 10 bolt rear with 4:10 gears. The car pulls great on the street. There is definitly way more than 125 hp on tap. Anyone have any insight?

White_Hawk

iTrader: (3)

Get your money back for the pulls.

-Geoff

93camaro_zzz

iTrader: (13)

Yeah, I would agree. But it obviously isnt a problem with your car, just something up with the dyno. I would still put the dyno #'s in my sig though.

n2ocamaro

The guy really didn't charge me anything so the money was a non-issue. He was really cool about it. He is trying to figure it out himself. I know its not the car. I am going to a Dynojet dyno later to give it another try. I am hoping someone who has operated a Mustang dyno will be able to shed some light on this.

Tuner@Straightline

There could be a lot of reason's why it would do that. I think we've seen the full gambet of what could go wrong with a Mustang dyno, but we haven't had a problem with ours for over a year now, when the Mustang guys came out and loaded a new hard drive in the computer. The load capabilites also differ greatly depending on the Model, do you happen to know what Mustang Dyno he was using? Here's a few things I would check.

1) Load sensor is broke. Fix: Take voltage reading from load cell.

2) Fuse for PAU Force is blown. Fix: Replace fuse.

3) PAU drive cable has a short. Fix: Check cable for resistence.

4) Make sure the Dyno is calibrated with Parasitic Multiplier value of 1.

I can take a look at your dyno sheets if you want to fax them or email them to me. If they have the "PAU Force" on them it'd be a great help. I also noticed you're in Indiana, we're only about an hour from US 41 if you're still interested in using a Mustang Dyno, we have had cars pull up to 2500hp on our Mustang MD-1100SE.

n2ocamaro

Mike, I do not know what model it is and I did not get the graph. I assumed at the time it was useless. I will call the owner as soon as he gets back into town (He left yesterday and won't be back till next week). He is a member on this board so he may chime in sooner or later. I will try to have him fax/email the graph to you. He had a couple LS1 cars (6 speeds) on it earlier in the week with no problems. Thanks for the input!

Jake@EPP

We have also been though the whole deal with the mustang dyno. For automatics, you need to lock the TC for best data. Be sure they were not using a Roll speed RPM calculation. We use a obd2 pickup for RPM on ours, for older autos we use a optical eye on the balancer.

Any questions, id be more then happy to answer.

n2ocamaro

I have a th400 so no lock-up style converter. He was having a problem getting RPM with the inductive clamp that you clamp on the spark plug wire. He had to use the gator clip lead and tap the coil wire to get RPM. It seemed to be reading correct RPM after that.

Tuner@Straightline

He was using the TS-1 pick up. I've used the roll speed calculations for TH400 set ups a few times. It's always worked well enough for me to get the AFR right. HP numbers, you got to take with a grain of salt though.

n2ocamaro

Yeah, but 125 isn't even close. I was expecting lower numbers than a Dynojet, but that isn't even in the ballpark.

Tuner@Straightline

You're correct, 125 is very low. Try to get me a dyno sheet so I can see how the curve looked, that'll tell me more than anything. Just make sure it has the PAU force on it as well.

sidewayz28

iTrader: (24)

i dynoed my 232/234 cammed, 243, 90/90 car on a MD and i somehow dynoed 345ish... made 395 rwhp on a dif mustang dyno after the tune with the cam only.. i think some people dont know how to operate their machines

Tuner@Straightline

395rwhp through a M6 and Fast 90/90 with that cam seems about what I'd expect to see on our MD-1100SE. If the 345rwhp was before the tune, then it seems a little low, but not out of reason. I ususally don't pull untuned cars above 6000rpm (usually only to 5500rpm), but I'd think that 355-365rwhp untuned would be a little closer to what I'd expect.

sidewayz28

iTrader: (24)

395 was with the ls6 intake, 241 heads, cam, LTs and through cats..
the 34x rwhp was after i did 243s, 90/90

Tuner@Straightline

Interesting, did they baseline the car before they started tuning? Is the car a A4, if so was the converter locked or not?

GrannySShifting

iTrader: (10)

The calibration means ALOT in the Mustang setups, ours has been 70 hp lower than the same exact unit at another shop on back to back tests with no changes in some instances.

Tuner@Straightline

I know, the two Mustang dyno's I've used before were off by about only 10-15hp. Having them set up is key to having them work properly.

GrannySShifting

iTrader: (10)

Pretty much, we actually had to show Mustang some stuff setting ours up.

Zombie

iTrader: (2)

I'm in the same ball park as you. My car makes 470 RWHP on the mustang dyno at 14psi of boost from a T76 turbo. The car is 3700-3800lbs with me in it and I run 10.5's at 130mph. I don't know if there is some super secret way to dyno a th400 car on a mustang dyno, but I'm pretty sure my numbers are a little better than that considering I've seen a M6 car make 480 RWHP on the same dyno in same conditions and he only manages 12s @ 118 mph.

When I was 6spd I made 470 rwhp on a Dynojet at 8psi.

Tuner@Straightline

Non locking converters get killed on a Mustang Dyno. I had a D1SC 402 with a TH400 car at 15lbs of boost make 600rwhp and 800rwtq, I'd love to see what it would make on a engine dyno, or through a six speed.