[s-cars] More dyno results

[Djdawson2 at aol.com]

In a message dated 9/14/2004 9:55:36 AM Mountain Daylight Time, 
cpayne at bconnected.com writes:

> Great post..thank you for the valuable information...wish I
> could have had my car there to "defend" the ITS K26 with OEM IC
> ..especially with the Apikol FMIC now ;)  


The way I see it, there's nothing to defend.  This is just a development 
process that hopefully some folks can benefit from.  Hell, at the cost of multiple 
turbos and becoming a regular at the dyno, I sure hope someone benefits!  :)

>   Based on the last dyno session that you and I attended together
> you did 325 HP/401 ft/lbs of torque (Max HP at 4700 and Max Torque at
> 3800) with a full KKK RS2 set-up
>   My car on the other hand, with 40% leak-down on cylinder 5 and
> teens and 20's in 3 other cylinders, did 314 HP/380 ft/lbs of torque
> (Max HP at 5600 and Max Torque at 3900.  Obviously this is 11 HP less
> and 21 ft/lbs of torque less. Max HP 900 RPM sooner and Max Torque
> 100-150 sooner with the KKK RS2 vs. the ITS K26.


Well... we could speculate endlessly about the cost of engine condition.  The 
only way we could have resolved that, would be to strap your car on the dyno 
after rebuild... no other components changed.  I did, however, take the 
liberty of overlaying your graph on top of some of our tests.  The way it was, it 
was certainly suffering on the bottom end.  From a driveability perpective, here 
are some key points:
At 3800rpm, where the RS2 equipped car is hitting 400ft/lbs, your engine (the 
old one) was crossing 320ft/lbs.  Comparing the hp curves, the RS2 is putting 
out a steady 20-40hp more until about 5300rpm... where the 50 trim takes 
over.  From 5300rpm on, your car stays about 15-30hp on top of the RS2.  Peak hp 
numbers are only a fraction of the story, and I think 10 out of 10 drivers 
would prefer the RS2, as the area under the curve is way better in the useable 
range.

> 
> Now the questions one must ask are:
> -1) How much HP and torque was I loosing due to the worn cylinder walls?

We will never know... unless you return your engine to the original 
configuration.

> -2) How would my engine rebuild have effected those numbers since the
> compression/leakdown is back to new?

Same as number 1.  Our test car is likely indicative (equipped with the ITS 
killer), but your car had some other mods... exhuast and RS2 cam, I believe.

>   - Sort of hard to test now w/ the FMIC in place and OEM parts
> sold off.

Agreed.


> -3) Why was my peak horsepower 900 RPM later then the KKK RS2?


I believe that is because the A/R and turbine wheel used in that turbo is too 
large.

> -4) How would Hap's TO4E/K26#6 compare to the 46 and 50 trims you have
> tested? (Change no other variables)


Depends completely on the hot side his car is equipped with.  We'll 
understand more when he pulls it from the car... but visually, it looks like an 8 
housing.

> -5) How has my custom programming by Mihnea effected those numbers

Hmmm... all reasons why I'd be hitting the dyno between each change.

> -6) How has the Stromung Cat-By Pass effected those numbers

Well... the exhaust results were interesting...

> -7) How has the FMIC intercooler effected those numbers? (Latest dyno
> says 25 to 30 HP gain)

I bet that's right.
Take care,
Dave