vleo... u need a c/f trunk? lemme know if you need one.. i'm the one with IP G coupe on @ church dyno day... pm me

 

Eldy and Albert! Damn you guys were almost hitting 280!

Gurgen,
I don't know why I didn't think of it earlier. The next time you hit the dyno we could switch our mufflers. They're fully interchangeable.... At least you can see what the difference would be without buying and building it yourself.

Leo,
I'll try sending it again. ...And let me know when you are ready to try the 05 6MT plenum mod. I'm ready and eager to see what it will do.

 

Tony... I don't have the flanges welded in...so it wouldn't be that easy. I am getting the muffler now anyway... jsut can't decide...i think the 5x8 may be wayy too small and hence noisy. Considering two of those 4-6" diameter round cans, i think they may fit. What do you think?

also, how the heck to you convert the indicated values to the US SAE units.. I am stuck with Nm and kW..

Here it is nontheless...

 

Gurgen,

I havn't actually used the viewer yet. Been too busy unfortunatly.

As far as the exhaust goes, we could easily hook up my mufflers.
...you know the rear section of the stillen exhaust connected to the muffler has its own flanges near the pumpkin... We could just unbolt it from there and swap it out with mine. Super simple. And its not like we need to connect your muffler to my car either.

If a air hose is available I have the air gun for a quick install. And I've done it so many times I can do it quickly.

 

In the Dynapack program, press the HOME key and then press F10 on your keyboard. Click on the "System Setup" tab at the top of the screen if you have to. On that screen are the options for units.

 

If my actual gear ratio is 5% lower than the one input into the Dynapack software, would it depress or elevate my results? I have an idea but just want to verify.

 

Hmmm... do I sense another dyno day coming upon us?...

 

How do you mean? unless you've changed your final drive ratio (inside the pumpkin) ... it won't matter. Did you?

btw ... finally DynaPack released the 'viewer'. Thanks the Lord!!!

 

I went right after Gurgen and the ratio was left with his 3.538 rear end factored in for my 3rd gear pulls. It was 5.204 but it should have been 4.935.

Hurrah! The Dynapack software is out! I feel like I can work at Church's now! That software interface seems like it's from the early 90's.

 

Eldy,
If that's the case ... ur figures are blown. It ought to be less then what you got. Doh! I'm curious, did all AT ppl used Gurgen's FD setting? That's not good.

 

wow if that's true, it blows.... there has got to be a way to change it withing the program, or calculate it yourself. The raw torque numbers are captured, so when you export it to Excel, just multiply by the correct fudge factor, in your case it would equal 4.935/5.204=0.9483

 

not quite as simple as that ... the associated rpm will also need to be remapped!!! Should be doable, however.

 

I say Eldy gets another run at Church's.

Here's my graph. The ratios appear correct.

 

I already communicated to Shawn about it. And he offered to have me do my runs over for free.

The dyno stopped capturing at 6300 rpms, 95% of that is closer to 6000 rpm. My thoughts on it were the same as Shawn's. The engine was using less mechanical advantage (4.935:1 < 5.204:1) to turn the hubs than the dyno was told so the torque values were depressed rather than elevated.

If the raw torque numbers can simply be shifted to the left since the dyno thought 6000 rpm is actually 6300 rpm (since engine speed is derived from hub speed with a Dynapack), then I could use Excel to divide the raw torque numbers by the correct ratio (4.935) then multiply by "corrected RPM" and divide by 5250 to determine HP. In fact when I do that, peak hp (for up to 6000 rpm) stays the same, just shifted down to 6000 rpm. It is interesting to note that by using the approximated slope of the torque curve, there would be 215 ft-lbs. @ 6500 rpm. Using those numbers we would have 266 hp @ 6500 rpm.

Let's start a poll about who's theory is right and the ones that are wrong buy the ones that are right dinner!

 

The "raw" torque numbers captured should stay the same. The "corrected" torque values would be slightly higher because the actual divisor < inputted divisor. This is all assuming that "flywheel torque" is derived from "torque" in the Dynapack program and not that other way around.