swedepat

Today i finally dynoed my c55 on Rototest unit.
The one of the most 'hard' dynos out there.
It is actually certified as testunit for car fabrikants and in europe as ISO control unit.

First, a picture with some Swedish test of a stock Corvette C6 on different dynos with the exact same car with no mods in between dynosessions:



In this test you can see how low numbers the rototest produces, itīs actually the same as a rollerdyno(that has more losses due to rubber against roll)

Now my car, i have dynoed before at Dynapac to 370hp ish power, no dynosheet to show

With exact the same engine with a minor mod(inlet elbow only)
We started out with 330.1hp(about 40hp lower than dynapac session last year)

After several pulls, about 20 of them we gained just about 15 rear hub horses and a lot of torque down low.

This would actually equal to about 390hp at dynapac.

We dynoed hard and dynocell showed really really hot air, and it was really hot no joke!!
We measured over 100degree fahrenheit at the best pull.(105.8f)
Dyno done on 4th gear with AC shut off.

We gave up at 344.8hp
And keep in mind: autotranny steals more hp than an manual car, Corvette was manual)


Ignite your flamethrowers

swedepat

swedepat

And To make myself look a bit dumb or stupid, just add about ~40-45hp to my latest number and you got the number a dynapac session would show.

But, i wouldnīt share those numbers if i havenīt checked them backward and forth a couple of times.

swedepat

Correction!

About corrections being made, it has not.
If i add yesterdays weather into my own dyno i get 1.064 in correction value.
344.8x1.064=366.867hp

So, final result that you can compare with others are 367hp hub power.

sick430

Wow!!!!!!! That's fantastic power, are you running long tube headers?

Amir_AMG

nice results!

swedepat

thanks guys.

Yes, iīm running my own longtube headers, built them myself.

a video: (dunno if itīs working.)

https://www.facebook.com/patrick.wetterskog/videos/10153914808134475/?l=6690221886635250693

Seems not.

try this:


h**ps://w*w.facebook.com/patrick.wetterskog/videos/vb.540649474/10153914808134475/?type=2&theater

swedepat

swedepat

Was out tested a little yesterday late evening.
Around midnight, very fresh cold air, wanted to see performance as i know the car really really loves cold air, but my tires donīt,, dilemma

However:


Had huuuuge tractionproblems, 5.7 to 60mph, normally it does on a warm day around 4.4s
But the interesting is trapspeed, i have calibrated the app against gps.
191.9km/h equals to 119.26Mph
I really really need some hoosiers

The app have always reported about 30hp less then dynoresult.
So you can add ~30hp to 365.9 and get real worlds approximate hp in cold weather.
395hk to the wheels ainīt dog**** i would say.
That is about 480-485hp at the flywheel.

Morphh

Nice mph

swedepat

Too bad i canīt get those numbers all day. just late evenings.
More normal is about 114Mph on a sunny day, about 80-90f
The 119.26mph was acheived at ~50-52f

swedepat

Update,, got 118.4Km/h on middle of sunny day.
To bad the converter is so tight, there will never be any cool ETīs

nicks158

Hm, I've had Torque App HP readings of 360HP with my C32, but never bothered to try the 1/8 or 1/4 mile features. I'll have to give it a shot and see what she comes up with. I'm only on Pilot Super Sports so I may have a hard time hooking up. Id be truly astonished though if my car is actually making 480 at the crank. My highest dyno reading was on a Mustang though, and with ambients of 85f, charge temps of 140F (This was with OEM pump and OEM H/E) my car put down 310whp, while spinning. (This goons couldn't run that dyno to save their lives, so I really don't trust the number.)

Since that dyno run, I have upgraded the full intake cooling system with pump, H/E, and better plumbing and had the car Tony Tuned. Also has a E/C pulley (64.7), E/C headers, LSD, and I'm sure im forgetting stuff.

Either way I have noticed that it seems my car like to perform better at highway speeds (60mph+), likely a combination of the gearing in these cars and the shorty headers I presume.

swedepat

you have to configure the app really carefully, the speed isnīt taken from gps signal.
Itīs taken from what the car reports, and if you altered the rolldiam of the wheels, the car donīt know about that.

And if you get just slight tractionloss the app calculates the power totally wrong.
My personal record in 'wrong' is 1382Hp *lol*
If everythings configured correct, the app will give you 'almost truth' numbers.

I have verified against Gtech and Gps
Torques speed is verified against gps also.

RLx02

Wow, can we see pics of your home made headers? Nice dyno numbers!