3.6 conversion back from Dyno!

[Jcon]

I had my car at AWE the past two weeks making some tweeks to the exhaust. Thier exhaust is a work of art and sounds great as well. They were using the car to mock up twin cats as an add on they will offer later. Anyway while it was there they put it on the dyno - Mustang -

Car

1981 SC w/ 92 3.6
Cyntex Chip
Lightweight fly wheel
"Plastic Intake"
AWE Complete exhaust


Peak HP - 268.3 at the wheels
Peak Torque - 249.1

I'm a little skeptical..I'm making a couple of small changes in the next couple weeks and will have it rerun at Cyntex. Lucky for me they are 2 miles from the house.

As a side note the AWE exhaust is oustanding...Kenny McNiel is one of the nicest guys you'll ever talk to and very knowledgable...I'm not affiliated with these guys...Just a happy customer.

I'll post the dyno charts when I get my scanner hooked back up.

Jeff

[Bill Verburg]

You have to take all dyno readings w/ a grain of salt. Even the best w/ ideal conditions is not a precision measuring tool.

[dean]

Hi Jeff.
Are you happy with your 3.6 in your car?

I sort of find it funny that most NA guys say that dyno's aren't accurate. And most turbo guy don't. If you don't think they are accurate why go?

Dean

[camgrinder]

Cyntex's Mustang dyno numbers can not be compared to numbers from a Dynojet.
Make the changes and rerun on the same dyno.
After your all done take it to a dynojet and get the big hp printout.

Either dyno is fine as long as your comparing numbers made under the same conditions, the same dyno, same tire size etc, etc. I have seen an underinflated tire kill 15 hp on a dynojet.

[89911]

268 at the wheels transfers to 308 at the flywheel.....just a tad optomistic for a stock 3.6 with a different exhaust. Wasn't the 3.6 rated at about 250 at the flywheel? Speaking of dyno's, I just got back from a session with a dynojet. We are still working out the bugs of the fuel/air ratios, but I was able to get 225hp/wheels on my 3.4. Not earth shattering, but if you factor in drivetrain loss, it's 258hp, same as stock 3.6. Even these figures are for comparison only and I can't really do too much with them but make changes, (which me and SteveW are doing!). Even said, I would of loved to have 268 at the wheels!

[Jcon]

Bill - Very true...what I take away is the motor is healthy and strong.

Dean - I'm very happy. Lots of power and a more modern FI system. That being said I can't yet say I feel it's worth the expense to do it right. I certainly don't regret it and I think I'll be even happier with it when i get it back to the track. As for why I dyno'd it ... it was really the guys at AWE. They were using the car to test some of thier systems including a new cat option so they wanted to run back to back comparisons.


89911

268 sounds high because it takes the rear wheel over 300 with basic upgrades. I don't think it's off by much though. The 3.6 was rated at 250, but was then rated at 272 from the factory with no change other than a better flowing exhaust. That exhaust doesn't come close to the flow from my current cat free set-up. Through on a chip, light weight fly wheel and some intake tweeks and I expected about 290 or so at the fly wheel. Like Bill said though it's not an exact number.

No matter what the true number is the damn thing moves.

Jeff

[89911]

Jeff, that sounds about right. In my next life, I'm going to get a car that produces 500hp stock. No upgrades, transplants, tuning, etc. Why couldn't Porsche build overpowered cars?

[Bill Verburg]

The best metric of the engine is to time a single gear roll on. Say 3^rd gear from 2000 to 6500. The trick is to find a flat piece of road w/o gendarms or other distractions. Little bragging rights but solid data.

[Jack Olsen]

Are you sure the dyno wasn't adjusting to produce a crank figure?

[911Velocity]

89911,

I'm with you. Porsche did build a overpowered car but it costs $500,000. Way out of my league.