Dyno #'s, a little suprised...

[Michael Yount]

Wind resistance and weight of a vehicle have absolutely no bearing whatsoever on how much HP gets delivered at the drive wheels of a particular vehicle. They do affect the level of performance you can get for a fixed amount of power. An example of this is the LS1 that's available in both the Corvette and Cadillac's new sedan. While not identical, the motor's are very similar in output. But the performance of the two vehicles is quite different due to (among other things) the different weight and aerodynamics of the two bodies they're in. On the dyno - their outputs should be similar.

The factory rating approximates the power output -- but in reality there is a wide range of power outputs from factory produced engines because no 2 are identical. The testers in magazines will tell you that it's not uncommon to have as much as .5-.8 seconds difference between two identical models of the same car. Some come out stronger than others - it's a fact. So all the factory number does is give you an idea of the HP/torque levels and the rpm at which they occur -- that the designers were shooting for.

 

[Michael Yount]

The DynoJet dyno is an inertial dyno. You simply spin a known mass (two big 8000 pound rollers) up to speed in a certain amount of time. The computer is programmed to translate the time it takes, and the rates of change of velocity and acceleration into a HP curve, and from that they calculate a torque curve.

The Mustang Dyno has the ability to input resistance to the roller wheels using electric motors (eddy current dyno). By measuring how much resistance occurs when the car's trying to accelerate, they actually measure torque, and calculate HP. Because they can put a load on the roller wheels, they can SIMULATE - based on weight and aerodynamic factors - what it would be like driving a particular vehicle on the street, up and down hills, with aero-drag loads at speed. But it's only a simulation, and only as good as the programming and the data put in regarding the vehicle. Again - it's very difficult to accurately and repeatably measure torque and power outputs. People tend to put way too much stock in the actual numbers, instead of using the numbers as a simple tool to improve performance.

 

[Qwk88LX]

Any students been messing with the cal factors? Roughly corrected to dynojet numbers, you'd be making 246-258RWHP and 326-340RWTQ. Much too high for your mods.

WOW!! Assuming a 20% loss through the drivetrain since its AOD, that would be 322.5HP & 425TQ at the flywheel .. even with a crappy AOD, you still wouldn't be running 14.9's!
Somethings definitely off..

 

[v8only]

Is that your car in your avatar?? Please don't tell me you bastarized an 86gt ttop with that front end.

Nice #'s for a e6 headed car.

 

[86GT-Top]

yea its my car in the avatar but thats not my 86, it's been gone for a year, i totaled it and never changed by name, actually, how can i change my name? and my minor bolt ons are motorsport shorty headers, off road H, mac catback, bumped timing, no A/C or smog, and a K&N cone filter...nothing to special.

 

[Mavrick]

Is that your car in your avatar?? Please don't tell me you bastarized an 86gt ttop with that front end.

Nice #'s for a e6 headed car.

And if he did? SWEET! Who cares, they are just bumpers. And how is it "butchered" when it is bolt off/bolt on. Can be reversed, and they can be bolted onto another car.

You people make such a big deal out of it, why not look at it as a positive? Your car may now be more rare than ever before because people are putting aero nosed bumpers on them instead of 4 eyed bumpers.

I love the 4 eyed look (85/86 only) but come on, you people have to give up that whole argument, really.

 

[Idwitheld-1`]

How would you verify calibration on a mustang dyno? I think something's off on the dyno ? I've got the same basic mods and run 14.4 (AOD). IF you add up the stickers I probably have 4 to 6 thousand HP!!!

You kids these days are so lucky. A mustang dyno in auto shop? We had a wrench set with a missing 5/8 and two hammers. Lucky dogs......

 

[86GT-Top]

How would you verify calibration on a mustang dyno? I think something's off on the dyno ? I've got the same basic mods and run 14.4 (AOD). IF you add up the stickers I probably have 4 to 6 thousand HP!!!

You kids these days are so lucky. A mustang dyno in auto shop? We had a wrench set with a missing 5/8 and two hammers. Lucky dogs......

lol, it's not just auto shop, im in tech school at Lincoln Tech, so that should make it sound a little more reasonable

 

[v8only]

email the admins, or guys in charge of the site, they can change your name and keep your post count. Too bad about the 86, you've got to be bummed. My bro ownes an 86 gt ttop, love it to death, def one of the baddest foxes ever built.

 

[Joe Jr.]

michael, good info, i kinda had a wild hair that day when i said maybe the bhp that the factory states is maybe more realistic....probably not at all...lol. It is interesting how much some guys are putting on dyno #'s these days, especially the 03,04 cobra guys. No putting down intented, that new motor is what should have been in the 99 Cobra....thats another discussion.

 

[brands5.0]

good # eather way