Great #'s!

 

If you will look at your posts from several months ago, I asked you a couple of time to post a dyno and also mentioned I thought the number were not correct. You got a lot of guff then and you'll get some more now. The ls 3 , ls2 and the ls7 m6's lose approx. 55 hp through the drivetrain. Period. If yours shows 17, on a dynojet, stock, you got a bad reading. 3 bad readings.

 

Congrats.. nice numbers.. while dyno numbers will vary.. your car seems really strong.. ignore some of the noise on this thread.. it happens every time.. enjoy your new ride!

 

I'm pretty sure I've asked too. I'm also sure he had some mods done for the claimed 419 RWHP run. Either way, his posts don't pass the sniff test and he won't verify his numbers. Credibility is important on this forum, just look at the C6 fast list. Most people here are honest, the required time slip is for the few with ego issues.

I don't think a dyno sheet is going to clear anything up since it was done on a Mustang dyno...you can put in aero/weight numbers to skew the data and we'll never know what they were. So we'll go with the ~55 HP loss through the drivetrain BOB EAGAN cited above and know that anything over ~390 RWHP (SAE corrected) on a DynoJet has something else going on like high absolute atmospheric pressure and/or low temps...or unknown mods/dyno operator tricks. But, 419 RWHP on a Mustang dyno is way outside of the realm of influence from weather conditions which leaves only two other choices assuming there is an actual dyno sheet and it is an SAE corrected number.

PS The 390 RWHP number above came from the maximum possible HP an LS3 can have which is 445 FWHP...remember it's 436 +/-2%.

 

I don't think anyone is giving the op a hard time with his dyno #'s, although only an 11% loss from a maxed out stock motor 436x1.02=445 is pushing it I think. Statements of 419 rwhp are the ones that are being questioned. Everyone needs to realize these motors are built to engineering print with specified tolerences using precision machines, and tested to released standards . There are no freak motors, just freak dynoes.

 

Wow, You got that right. You have to do H/C to get those kind of numbers on a lowly LS1.

 

im just going off what my tuner told me, i dont really get on here alot so i just forgot to look back at that thread and see you wanted them. though ask TJwong, he is a very highly respected corvette installer and tuner on the whole west coast. there was another ls3 vet like 2 months ago that dyno'd 409rwhp on a 100% stock car.

 

With all due respect to TJ Wong sounds like he needs to have his dyno calibrated. Even 409 rwhp isn't really believable, that would indicate only an 8% loss through the drivetrain. Like I said before, the engines are built to print with computer controlled machines and tested to a standard spec. No freak motors, just freak dyno's

 

You know, I need to put my boots on. I don't want to step in anything.

For a guy that doesn't "get on here alot", you have a 163 posts since March 2009 (that is as of 7.5.09 at 6:49 est). You are averaging almost 2 posts per day. You are on here plenty.

Time to post your dyno sheet. Not saying that your assertion of dyno dominance isn't true but until you prove that the anomaly exists, no one will believe it.

 

ill get her posted up maybe he will be in the shop tomorrow.

 

For a guy that is not on here much, that sure was a quick response...............


Get the dyno sheet up. It will make me hate my LS2.

 

LS3 envy

Get the heads for your LS2 and be within 10hp.

In the end, some kid with a 22psi boosted forged LS1 will rip by all of us and laugh since he got the car for 10k.

 

I'm glad to see that your sense of humor is still as good as your technical skills! Enjoy!

 

Even if you do post up a dyno sheet, it is still just a piece of paper. You car isn't really putting down 419 rwhp in stock form period. If you want to believe it fine, but like I said GM builds the cars to print, dimensions are spec'd with tolerances and made with precision CNC machines. The engines are tested to standards and are rated power +/- 2%. Dynoes while being built to print are subject to ambient conditions and operator error as well as calibration issues. End of story.

 

He didn't say the 409 stock was on TJ Wongs
That was from an 09 at redline,Where they say they routinely see them! Thier dyno is high not Wongs!
Dyno. I did 421 on his Mustang dyno with headers, Ls-3 Then went to a Dyno Jet
and did 428 with the same set up. Nothing wrong with his dyno.
When I was there and thats been three or four times.

 

But quit being a knowitall! About Mustang dyno's which your clearly not! They don't control the rpm's. The gas pedal does Just like a dyno jet! My experience with the same dyno was ls-3, headers,vararam. 421 rwhp 417 rwtq. Went to a Dyno Jet and made 428rwhp
430 rwtq sae smoothing 5.SAME set up! Went back after installing my own A&A kit
only to see 514 and 453, which are low readings. Made some changes and made 578 530 on the same dyno. Can't explain Freaked ls-3's claim's of 419. I don't buy it, not stock on that dyno. Some of the other stuff I read from him needs to be proven to me, Someone was bragging about some boosted
teal Inteagra. I raced that car and SMOKED it 3 times by a full ZIP code.
They didn't remember that!

 

My was a doggy 372. Over 400 bone stock is bs and is due to
either mods or high reading dyno!

 

I certainly don't know it all but I do know a few things about dynos and horsepower which I feel obliged to share with/educate you a little after such a scathing post punctuated by multiple exclamation points.

Take a look at the big dog of Mustang's chassis dynos:
http://www.mustangdyne.com/MD-800.htm
Do you see where it says Loading: 900 hp(Single Eddy Current Model Only)? Do you understand what that means? There's an eddy current power absorber that can absorb up to 900 HP in addition to the load provided by the inertia of the rollers. At a constant RPM, the rollers provide zero load to resist the HP of the engine leaving the eddy current absorber as the only resistive load. That means if you can't put more than 900 HP to the rear wheels, the MD-800 can hold your engine at whatever RPM it wants no matter what you're doing with your gas pedal.

The ability to control the RPM is typically touted as the main advantage of a Mustang dyno over a Dynojet. (It must be noted that Dynojet does have a model with an eddy current absorber now, I'm talking about the pure inertia types most people associate with the name "Dynojet".) As HP levels go up, the dyno run gets shorter with a pure inertia dyno which impedes the tuners' ability to get a proper tune. The Mustang dyno has the ability to apply an additional load via the Eddy Current absorber and control the RPM increase to get a dyno run of sufficient length for the tuner to get a proper tune. (And I'm not saying the tuner doesn't have time with a Dynojet, it's a matter of a certain part of the tune not getting accessed during a short run.)

Even if you put your gas pedal to half throttle, a Mustang dyno will still control RPMs (and RPM increase to a certain extent). Read the follow links:
http://www.mustangdyne.com/MDSoftware/softwareperf.htm
http://www.mustangdyne.com/MDSoftware/softwareTime.htm

You'll see in the first link the "Horsepower Curve" is done using the sweep test method which is required in SAE FWHP rating tests (which is a whole other subject). Essentially, the engine RPM is allowed to increase at a certain rate like 250 RPM per second so that the needle will "sweep" across the tachometer from 2000 RPM to 7000 RPM in 20 seconds (5000 RPM sweep divided by 250 RPM/sec). Read through the links above and you'll find numerous examples of the Mustang dyno controlling RPM...you'll have to figure them out, I'll teach you but I won't spoon feed you.

Of course, this all leads to the obvious question...with the Mustang dyno having an Eddy Current absorber, what the hell did you think it was there for???

Sorry, I couldn't resist that last one.

 

The post certainly wasn't clear that the 409 was done at another tuner's shop, it just said another ls3 dynoed at 409 recently, shame on me for assuming it was TJWong's. Anyway I wasn't busting on TJWong, if it was at another tuner their dyno probably needs calibration. Your numbers with headers and a tune are at least in the right ball park.

I still don't see the dyno sheet that was promised.

 

Well I've seen plenty dyno on a Mustang dyno. I know that the Mustang has the eddy current that adds the loading feature for tuning.
Didn't need to be a expert to know that.

I'm not a dyno specialist but my tuner's choice is the Mustang.
For the abilty to tune.
I have a great tune on my car. I just know that you like to knock the mustang dyno.
Your knowledge maybe more than mine. But your not a pimple on TJ Wongs *** as far Dyno knowledge. OR anything else about a Corvette.
And he doesn't sit and play expert, so live and learn and quit acting like an a knowitall!