Well, went to the dyno today...

[viciousride]

EDIT: Corrected RWTQ value.
---------------------------------------
Made 500 RWHP ~ 457 RWTQ (SAE corrected) with 17.5 degrees timing. This was a single dyno run with no real cool-down ~ dyno technician made 2 test runs to calculate drivetrain loss, then a few minutes at idle (with fan blowing), then the full pull. That's it!

I had the car dyno'ed at a local tuning shop called Schropp Tuning (http://bit.ly/bJpg7F) here in Germany. They use a Superflow AutoDyn 883 AWD Dyno (a.k.a. "The Lie Detector") which measures DINPS and DINNm for HP and TQ. Attached is the dyno sheet (converted to SAE), the dyno run data, and the SCT datalogs (zipped file w/ .csv & .xls) of the run. On the data sheet, the 'Rad_L Hp' is the rear wheel horsepower numbers, as well as DIN numbers, and the Lambda (1 & 2) readings. Max RPM was 5891.

IMO, the A/F ratio was spot-on for the upper RPM pull:
0.78 Lambda = 11.47 :1 AFR
0.77 Lambda = 11.32 :1 AFR

On the dyno sheet you will see 3 colors:
-Red is Engine HP (551.7)
-Blue is Engine TQ (545.0)
-Green is RWHP (499.7 @ 5567 RPM)

I am very happy with the numbers especially on the the first and only run! I'm at the limit of the stock short block so no more for me!

Many thanks to Team JDM for giving me an excellent tune and for the great customer service!

-Mitch

P.S. Mods are: Edelbrock E-Force Comp Kit with 3.25 pulley, Thump Racing tensioner, Comp Cams NSR 127200 cams, GT500 pumps, 60lb injectors, Kooks 1 3/4" headers, 3" O/R X-pipe, 3" Magnaflow exhaust, and Powerhouse 4" alum. D/S. I think that's it.

 

[mac10chap]

bad ass

 

[*JZ*]

That's awesome! Just be careful with that high of horsepower on a stock motor.

 

[dysan]

Damn those are some nice numbers. I wonder if I don't have my e-force lined up perfectly with the intake ports on the heads or something. My numbers were much much lower than yours.

Are you on the stock block or forged? That could be the difference since I'm 9.3:1 compression 302 stroker and if you're the normal 9.8:1 that could be the power difference. I'm sure your cams help as well.

Get it to the track!

 

[viciousride]

That's awesome! Just be careful with that high of horsepower on a stock motor.

Yeah I know...it's ticking time bomb!

I have a 302 stroker motor standing-by just in case...

 

[viciousride]

Damn those are some nice numbers. I wonder if I don't have my e-force lined up perfectly with the intake ports on the heads or something. My numbers were much much lower than yours.

Are you on the stock block or forged? That could be the difference since I'm 9.3:1 compression 302 stroker and if you're the normal 9.8:1 that could be the power difference. I'm sure your cams help as well.

Get it to the track!

To be honest, the temp was ideal for the dyno run. I believe it was low 60's here today, but high humidity ~ 90 or so.

I'm running the stock block with only 750 miles on the clock -- the car sat through winter (Nov - Mar) and I waited months for the Edelbrock Comp Kit for the 2010 GT...it's a long story.

I'm REALLY hoping to get it to the track here in Germany by the end of this month. Fingers crossed!

 

[dysan]

Just be sure not to lug the engine too much while in boost since you're still on the stock block.

EDIT: Unless you're looking for a reason to put that 302 in!!!!!

 

[viciousride]

Just be sure not to lug the engine too much while in boost since you're still on the stock block.

EDIT: Unless you're looking for a reason to put that 302 in!!!!!

Believe it or not I'm pretty tame with the car...for now. Just waiting for a good race on the Autobahn.

I'm really hoping to keep the 302 in storage until next spring.

 

[*JZ*]

Yeah I know...it's ticking time bomb!

I have a 302 stroker motor standing-by just in case...

Now you're talking!

 

[Hawgman]

Congrats... but something isn't quite right about that. Typically twinscrews aren't going to make a higher rwtq number than hp like that. When I first started reading your post I honestly expected to see "turbo", not "E-Force"

 

[GrnBullitt08]

Congrats... Nice numbers

 

[dysan]

Hawg, mine did the same thing. I think mine was like 461hp and 483tq.

EDIT: 469hp and 481tq.

 

[Blxcklist]

Congrats

 

[viciousride]

Congrats... but something isn't quite right about that. Typically twinscrews aren't going to make a higher rwtq number than hp like that. When I first started reading your post I honestly expected to see "turbo", not "E-Force"

You know, to be honest I still question the TQ numbers. I thought about all night and really couldn't believe that was actual RWTQ. After the dyno run I asked the tech if this was RWTQ, or Eng TQ and he said, "at de veels" ~ German accent. At the time we were discussing a few things concerning the data sheet, so I think in the mist of discussion he may have inadvertently made a mistake concerning the TQ readout. I will ask him again today for verification. I'm thinking more like 475-480 RWTQ.

Note: If you look at the 'SAE Power data' sheet you will see at the bottom that I made 577.1Ps (HP) and 773.0Nm (TQ) using DIN measurement, with a DIN correction factor of 1.085. What does it mean? I have no clue.

In any case, I'm still happy with the RWHP numbers. I thought the most I would make was 420!

Sorry for the late response guys (timezone differences).

-Mitch

 

[viciousride]

Well, I spoke to the tech this morning concerning the SAE TQ value. This value is at the motor, and not the wheels. The tech calculated 457 RWTQ. I thought the number would be higher since the SAETrq value is very close to the SAEHp value as noted on the ‘SAE Power’ sheet. The tech (Peter, also the owner) was actually surprised that I wanted to know RWTQ numbers. He said no one has really asked him for that calculation. He doesn’t have the dyno programmed to calculate SAE RWTQ , so it took him a couple of minutes to do the conversion manually (Nm, Ft/Lbs, DIN correction, etc.). Even then it seemed he wasn’t too sure if the number was exactly correct...first he said 436.4, then he recalculated and got 456.6.

Oh well, overall I’m still satisfied with the power. The real test of power will be at the track!

My apologies for misinforming on the TQ values – wasn’t trying to inflate the numbers.

 

[viciousride]

Now I'm confused...

I used the following website to calculate Nm to Ft/Lbs: http://www.asknumbers.com/TorqueConversion.aspx

I used the following:
From: newton meter [773 for the value]
To: pound force foot
Results: 773Nm = 570 pound force foot (ft/lbs)

Not sure how to calculate the correction factor to get from 570 ft/lbs to the 545 SAETrq, but in any case my RWTQ value should be higher. Let's say factoring in a 12% drivetrain loss I get 479.6 RWTQ.

Man I wish I had access to another dyno that didn't factor in so many conversions.