Contour Enthusiasts Group Archives Forums General Dyno and Drag Ok boys Add you SC / TC Dyno sheets here

I found these 2 so far (didn't look very much)


SC SVT Contour -




TC Cougar (Regular DURATEC) -


I know there were more on the old forums, but haven't checked there. Please add more!!!

I don't know how else to say it but:

That's some mad yummy torque commin' out dat turbo yo!

David Z got 286HP/247ft tq out of a N/A 3L

Originally posted by nyceboi:

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David Z got 286HP/247ft tq out of a N/A 3L

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About that at the CRANK Big difference then at the WHEELS.

He made around 240/210 at the wheels. Quite outstanding for N/A in the least!!! His peaks were very nice, but his power curves were a little lacking.
He did have almost 12:1 CR, 3L valves, race cams, and serious head work done though to get such numbers.

I belive DavidZ's old motor is now in JJennings Cougar and it's now in the mid 250's at the wheels and awaiting the install of a stand alone management system.

Gotta love that turbo torque.

Originally posted by DemonSVT:

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Originally posted by nyceboi:

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David Z got 286HP/247ft tq out of a N/A 3L

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About that at the CRANK Big difference then at the WHEELS.

He made around 240/210 at the wheels. Quite outstanding for N/A in the least!!! His peaks were very nice, but his power curves were a little lacking.
He did have almost 12:1 CR, 3L valves, race cams, and serious head work done though to get such numbers.

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He also never had the motor tuned on the dyno.....

I'm not sure where my old one is but I should have a new one soon enough. Tonight was 239 and 213 on 91 octane and only 6psi. It was also 95 degree out which didn't help and it was my 56th run for the day.

Originally posted by Keyser:

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I'm not sure where my old one is but I should have a new one soon enough. Tonight was 239 and 213 on 91 octane and only 6psi. It was also 95 degree out which didn't help and it was my 56th run for the day.

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And here is that dyno:

The area under the curve for both turbo graphs is just phenomenal, and you really did boost the low-end torque on the latest one!

There is one thing that is starting to disturb me though, and that is the fact that the torque is dropping off rapidly around 6000 rpm. This seems to be independent of the header design since there are two different designs shown here.
What is causing it?

Let me lay out the concern I have:
Shift points for my SVT when I punch it up to 7 grand are at about 5400 rpm, or somewhere around there. This means that in order to take full advantage of the turbo I would want to shift at about 5900-6000 rpm. If I tach it out to 7 grand then about half of the rev range is not going to have consistent power. I suppose shifting at 6 grand is fine when you have that much torque, but since the engine is capable of another 1000 rpm then you can make more power by shifting the same torque curve further up the rev range.

Things that come to mind:
1. compressor map. perhaps the range on the turbo has been chosen too low.
2. exhaust size. Not as likely in my opinion.
3. intake restriction. Perhaps.

Can you clear this up, or at least describe how you might be dealing with it?

warmonger

The torque drop off is an inherit trait of Turbos. Notice how the torque and horsepower don't cross at 5252 like the S/C and N/A cars do? It's just one of those things.

That was only 6.5 on cheap 91 rat gas. Let me turn up the timing a bit and add some boost and see what I come up with.

Originally posted by Keyser:

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The torque drop off is an inherit trait of Turbos. Notice how the torque and horsepower don't cross at 5252 like the S/C and N/A cars do? It's just one of those things.

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I believe that the crossing of HP/T at 5250 RPM is mathamatically determined..5250 is the denominator in the equation which predicts this...what is that equation guys?

Maybe the graph is screwed up?