[03CrazyStang]

I know ford says 190 hp... but how much hp do you guys think a stock 99+ mustang has?

[DanM]

No reason to believe any differently.

They typically put about 155 to the wheels in 5spd stock form, maybe 145 in stock auto form. If you assume nominal driveline losses, that works out to about 190 at the flywheel.

Ford hasn't 'underrated' these, if that's what you're hoping.

[03CrazyStang]

Naw i was just wondering

[atlblue2000]

Originally Posted by DanM

Ford hasn't 'underrated' these, if that's what you're hoping.

Hell fire, I'll vouch for that one...

[Esel]

Originally Posted by DanM

They typically put about 155 to the wheels in 5spd stock form

I can vouch for that; that's about what mine did, stock.

[Double T]

I got an 02 w/auto and I tested it with an acceloromiter??? and its got like 159rwhp. A couple other sites Ive seen verries from 155-161 you got to figure that when people take there cars to dyno them they are in a room and are unable to get proper air flow resulting in a slight decrease in HP

[ChaosStarter]

Is that all my '00 V6 5spd would've put out....ouch.

[5-SpeedStallion]

Well, unless I gained ~15whp from Aluminum D/S and Duals, mine put down more than 155 to begin according to my amazing subtraction skills.

[DanM]

Remember that dynos are an inexact science, guys. An error margin of +/- 10hp on a dyno based on (a) dyno type, (b) gearing, (c) ambient temperature, and (d) engine temperature is pretty common.

I could take a car, put it on one dyno, and have it make 160hp. I could then take that exact same car, and by conducting the test slightly differently, have it make only 150hp.

Don't take dyno numbers from various sources at face value. We can say a 99+ 3.8 makes about 150hp stock. Trying to be any more precise than that isn't going to work.

[atlblue2000]

We all know that the dyno thing is far from perfectly accurate. The REAL numbers that count are what you bring home from the track. But, as far as dyno numbers go, if me and you for example did the exact same mods and I rolled say 15 less rwhp than you, even though you and I know that the setups are the same and that the dyno figures do have margins of error, people still judge and make decisions for future combos based largely in part on those numbers. In this repest its important to get baseline numbers and numbers after the mods (definitely something to do with ETs as well) to compare the gains, not the final numbers.

I guess its kinda one of those money talks and bulls**t walks things. Too many people invest in peak numbers (hell, i'm guilty of this myself ), not taking into account variables like you laid out or the area under the curve, the more significant part of dyno data.

[SpectorV]

160rwhp 195rwtq stock for maual like 135-140rwhp from an auto do the math, the manuals loose 17.5% in the drive line and the autos lose 22%

[Mike3800]

Originally Posted by atlblue2000

We all know that the dyno thing is far from perfectly accurate. The REAL numbers that count are what you bring home from the track.

Only if "you" are cappable of pushing the car to it's potential under pefect track conditions. So... impossible.

Dyno is as accuracte as the track, and in fact probbably more since there is less human error involved with the dyno.

[SpectorV]

dyno tells you what the car has, track tells you what the car is capable of runnign with you as the driver.

[atlblue2000]

Originally Posted by Mike3800

Only if "you" are cappable of pushing the car to it's potential under pefect track conditions. So... impossible.

Dyno is as accuracte as the track, and in fact probbably more since there is less human error involved with the dyno.

Not impossible with practice. And no, the dyno is not as accurate as the track. Ever heard the saying "talk is cheap, take it to the track and prove your point" or any of the ten million variations thereof??? Anyone who puts more stock into dyno numbers than real life, real world track numbers has not got a grasp on the "real" way to assess performance. Granted dyno numbers are a good way to start, its the track numbers that let you know exactly how far the combo can really take you. So what...track times have more variables. You dont thinkn dyno numbers can be influenced?? There's an old saying among statisticians that goes a little something like this... Torture the data long enough and it will confess. How do you think places like RPM outlet can claim 20+ HP gains on that Motorvator crap?? You dont honestly think that the dyno is 100% full proof do you?? I'd bet this is one case where the track numbers would tell the REAl story. Gee...now I'm curious why I have never seen the advertised gains in ET/Trap speed to accompany the awesome dyno numbers????


Point is, they are both biased but both combined will serve to be the best means of attaining the necessary info to get your combo runnning its best. If it came down to only one or the other, I'd still choose to have track numbers first. Thats where the numbers are more important to me...what can my car do, how much does it have left in it?? IMO, dyno numbers are often times nothing more than good conversation starters or bragging rights. But hey...that's just me and no one ever said I knew my @$$ from a hole in the ground, right??

[Linz]

I watched an 03 V6 STOCK Automatic( the automatics dyno less due to drivetrain loss) do 146 rwhp and 163 tq.

That was the same day I hopped on the dyno w/ my 01 5 speed, intake and exhaust and dynoed 180 hp and 206 tq.

[ChaosStarter]

how the heck did you gain all of that just from a cai and exhaust... (which is what btw?) 25-30rwhp, huh?

[SpectorV]

he didnt.... the gain from exhaust and cai can not be that much, either the motor has more hp stock than normal/ he is not being truthful/ or the dyno was off.