D3 CTS-V Baseline and First Tune

[Fire and Ice]

In an on going effort to make more power, we would like to share the results of our baseline dyno run and prototype ECU box. Baseline run for the new 2009 CTS-V produced 493.0 rwhp. A little bit of tweaking and our prototype ECU box added another 36.8 rwhp making a peak of 529.8 rwhp while still maintaining a safe air fuel ratio of 11.8:1. Only the air fuel mixture was adjusted and NO other modifications were made for this test. Thank you.

[NormV]

19 wheels with tires to match must release allot of power when removed. Nice gain!

Norm

[james4513]

Cost, availability, installation, ...?

[jianco]

Your dyno is WAY more generous than others on the web. Most conservative stock numbers are 443 to 450 RWHP, and Henessey is highest at 470 rwhp. Your number is way high.

[darjae]

Originally Posted by jianco

Your dyno is WAY more generous than others on the web. Most conservative stock numbers are 443 to 450 RWHP, and Henessey is highest at 470 rwhp. Your number is way high.

That dyno is one that attaches directly to the axle (no wheel, tire loss). In addition, as stated many times in the forum, the baseline HP numbers are meaningless compared from dyno to dyno (even the same type). The important number is the difference between the baseline and the altered (before and after) numbers. The % increase should give a good indication as to the increase in power.

[rw99]

If Mustang (Eddy Current) dynos load the car more (resulting in lower rwhp/rwtq numbers), and Dynojets don't load as much, where do DynaPacks fit in? It makes sense to me to tune the car on the chassis dyno that most closely mimics real-world loading.

[thebigjimsho]

Must have been an auto. Nice loop...

[wait4me]

That isnt a bad gain from only changing the fuel curve and nothing more. Can you post the actual gains to the wheels instead of the flywheel motor like it shows so we can all add them to the dynograph charts for peoples websites. Not too many graphs out there so the more the better.

[wait4me]

Also Is the gear ratio set right?

[Fire and Ice]

Originally Posted by james4513

Cost, availability, installation, ...?

It is the prototype unit and although it did very well we are still a ways from production. If I had to guess, the ECU box would price the same as the ones we have for the STS-V and XLR-V at $650.00. This box would be a plug n play unit like the others and installs in seconds. Thank you.

[Fire and Ice]

Originally Posted by darjae

That dyno is one that attaches directly to the axle (no wheel, tire loss). In addition, as stated many times in the forum, the baseline HP numbers are meaningless compared from dyno to dyno (even the same type). The important number is the difference between the baseline and the altered (before and after) numbers. The % increase should give a good indication as to the increase in power.

Well said Darjae. Thank you for the explanation

[Fire and Ice]

Originally Posted by thebigjimsho

Must have been an auto. Nice loop...

It is indeed an automatic.

Originally Posted by wait4me

That isnt a bad gain from only changing the fuel curve and nothing more. Can you post the actual gains to the wheels instead of the flywheel motor like it shows so we can all add them to the dynograph charts for peoples websites. Not too many graphs out there so the more the better.

This IS rear wheel horsepower, measured by attaching the dyno directly to the axles. No wheel slip, very accurate and consistent when measuring gains or losses.

Originally Posted by wait4me

Also Is the gear ratio set right?

The dyno is set up correctly.

[Razorecko]

Very nice, you guys need to get a manual on the dyno with a tune also so we can see a good comparison in general drivetrain loss, and the curve between both.

[Fire and Ice]

Originally Posted by Razorecko

Very nice, you guys need to get a manual on the dyno with a tune also so we can see a good comparison in general drivetrain loss, and the curve between both.

Not a bad idea, but to get a truly accurate idea, we'd need to dyno both an auto and stick on the same day to keep conditions as close as possible.

[urbanski]

Originally Posted by Fire and Ice

This IS rear wheel horsepower, measured by attaching the dyno directly to the axles. No wheel slip, very accurate and consistent when measuring gains or losses.

posted chart says flywheel hp