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-   -   Measured Backpressure on the Vette (http://www.motorgen.com/forum/showthread.php?t=15231)

enkeivette 04-12-2010 11:15 PM

Btw the torque curve can never just shift. If it changes, it will still cross over at 5250rpm.

BRIAN 04-12-2010 11:21 PM

I understand, the whole unit conversion causing the curve to cross that exact point every time. You get what I meant though no? lol Just more torque higher up in the range.

Vettezuki 04-12-2010 11:41 PM

Quote:

Originally Posted by enkeivette (Post 49274)
You do realize that your car is already really fast don't you?

Yes. But Sean needs to be put back in his place.
http://www.motorgen.com/garage/times...43&SlipID2=136

94cobra69ss396 04-13-2010 09:15 AM

Quote:

Originally Posted by enkeivette (Post 49277)
Btw the torque curve can never just shift. If it changes, it will still cross over at 5250rpm.

That is incorrect. A change to a larger cam will shift the torque curve up. Horsepower and torque will still cross at 5250 but the peak torque will be at a higher RPM.

Throttle Crazy 04-13-2010 09:47 AM

My guess considering what your current set up and readings are is about 7.5% increase at the rear wheels across the board with headers and straight pipe. 420rwhp/396rwtq. Ron how much did you gain with just the x pipe instead of the high flow cats? I know the 1/4 mile time went from 12.1 down to 11.6.

94cobra69ss396 04-13-2010 09:57 AM

Quote:

Originally Posted by Throttle Crazy (Post 49312)
My guess considering what your current set up and readings are is about 7.5% increase at the rear wheels across the board with headers and straight pipe. 420rwhp/396rwtq. Ron how much did you gain with just the x pipe instead of the high flow cats? I know the 1/4 mile time went from 12.1 down to 11.6.

I'm not sure because I never dyno'd it but I picked up 4 MPH in the 1/4.

Throttle Crazy 04-13-2010 10:02 AM

Quote:

Originally Posted by 94cobra69ss396 (Post 49306)
That is incorrect. A change to a larger cam will shift the torque curve up. Horsepower and torque will still cross at 5250 but the peak torque will be at a higher RPM.

That is correct. Both numbers will just cross at a higher point in the 5250 rpm range. The curve has still shifted.

94cobra69ss396 04-13-2010 10:07 AM

Quote:

Originally Posted by Throttle Crazy (Post 49314)
That is correct. Both numbers will just cross at a higher point in the 5250 rpm range. The curve has still shifted.

What?

BRIAN 04-13-2010 10:18 AM

He's agreeing with you.

94cobra69ss396 04-13-2010 10:26 AM

I was questioning his "Both numbers will just cross at a higher point in the 5250 rpm range". I'm just not sure how they can cross at a high point in the 5250 range. Maybe he meant at like 5251 or 5252.:rolling:

By the way Throttle Crazy is my brother so I have to give him a hard time.


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