Going down to Indy on saturday for a dyno day with the indy club, I'll let you guys know how I rate when I get back into town

Good Luck!!!

deffinatly looking foward to the results

Post the results. Good luck!

Expect low numbers, this way you won't be disappointed, good luck!

yeah, I figure 250whp is a good number to shoot for

I need to get dyno'd again. There was a dyno-day set for the local F-body group here that I got signed up for. Something happened and the guy the headed the whole thing up got fired, dyno day cancelled.
I'm kinda glad it didn't go down, because in a couple of weeks I'll be getting a DHP and I will then have the chance to compare each PCM on the dyno.
Truly be able to tell which one dyno's better than the other.

Should we start a guessing game?
The closest guess gets nothing, but it may be fun.
We've got a few days.
What do you think 4rsssssssfed?

lets see... no pully I take it? Im going to say... 273whp. Im not positive what the mods do to these cars, but thats my best edumacated guess.

thats cool, I dont think you really need to dyno it to know which one is better though, I'm 90% sure the DHP will dyno a lot better than the intense, but it will be cool to see by how much

I'm game, a little fun never hurt anyone

I'm going with........ 281.

I think??? 277hp 296TQ

252 whp

just so everyone knows we should all be making WHP estimates and not CHP estimates

You'll see the difference.

I'm going with 265 WHP. Good luck!

Remember stock whp for the GTPs is only 200.

wow... i would have thought they had more than that. Ok i think i change my guess to around 230whp

245-250. :s

And three million torque!

Depends on what year, the 00 GP GTP put out 240. Not knowing what mods were put on, ummmm, 289 whp, 297ft/lbs

Boy, do I feel like a 'tard. More likely 298/305

I think you are thinking of crank horspower, and yes, all years 97-2003 were rated 240 crank horse power (200 whp)

do the trannies really rip off 40hp? thats just insane.

240

Most auto-trannied cars lose about 20% of the hp through losses in the tranny and rear-ends. Manuals don't lose as much.

Auto's lose so much because the tranny is a big hydraulic pump there really is no direct mechanical connections. So as the bands slip hp is lost. Where as manuals rely on a friction clutch and is a more of a direct mechanical linkage then the auto.

so you're telling me a 1000 hp car would use 200 of that power to run the tranny? something not right there.

fallen took my guess.....

I'll go with 225WHP.....

Not that the tranny uses that 20% just that with the way auto tranny's are designed you lose about 20%. If you do a google on crankshaft hp vs wheel horspower you should find more info that will explain it better.

A 1000hp car will not loose anywhere near that much because most run a direct drive system (Lenco) so that they get the most out of it. Even the classes that are designed for automatics, they still are built to give back the horsepower. I.E. last year at a dyno run I watched a car tune at 1650chp, then axle dyno'd at 1602whp. not much loss.
But, if you have the money, you don't loose much right?

wow... why the hell did our cars get the bad trannies? gm trannies are some of the best usually

out of all the cars that house the L67 the grand prix has the most "beefed" tranny. We did get the good tranies

yea... I guess so. but losing 40hp? How much can the stock trannies take anyways in GTP's? My guess is somewhere around 320hp before things start breaking.

I think the 4T65E-HD's are rated at 280hp/300tq, I think.

whats WHP?

never mind I'll read the whole thread next time hehe

It's not that our tranny's are bad because of that it's all auto trannies. It has to do with physics. HP loss is about 17%-22% on any given automatic tranny powered car. FWD is actually experiences a smaller loss the a RWD. Only because your not taking that power and changing directions by 90*s and spinning gears in a heavy oil. Many factors play into dynoying. Gear selection, tire size, alignment etc. Remember a dyno only measure how fast you can get a known weight to spin. There are fancier dynos that will take input supplied by the operator and can a more precise reading.

this is correct

thats it? i dont think I should plan on modding much anymore.

Looks like AustinGTP took the win with a guess of 240whp, my actual best dyno run was 242whp and 255tq, they're printer was down so they couldnt print the charts but they are emailing them to me monday, I will post when I get them

cool beans

Nice!
Thanks for sharing!

you didnt change the pully?

Why would I?

just curious if those numbers are with the stock pully or not.

He's running a 3.3" pulley.

Woo-hoo!
I'm a winner, I'm a winner!

all my mods are listed underneath my photo in my sig, the only thing that was different from that is that instead of running 95oct like I usually do I ran 110oct

Thanks for all the support guys, I'll post the vid when I get it edited

Congrats!

Now, it's time to build on that.