gear for dyno?

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Dec 9, 2004 | 12:57 AM

soccer794

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Racer

Joined: Jul 2004

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From: Fredericksburg VA

gear for dyno?

What gear should a 71 big block vette with a manual 4 speed in it be dynoed in?

Dec 9, 2004 | 01:03 AM

Schmucker

Melting Slicks

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From: Wisconsin

4th gear. They dyno in whatever gear is closest to 1:1, and with the 4spd that would be 4th gear.

Dec 9, 2004 | 01:09 AM

soccer794

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Racer

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From: Fredericksburg VA

Thats what I thought, but a good friend of mine who's really into cars pointed out that the gear was really long and didn't know if it should be done in 4th gear...I know a lot of 6 speeds are done in 4th so I wasn't sure.

Dec 9, 2004 | 06:05 AM

Gordonm

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From: Forked River NJ

The 6 speeds are overdrive. You always do the dyno pull in 4th or whatever 1:1 is

Dec 9, 2004 | 08:46 AM

MotorHead

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From: Who says "Nothing is impossible" ? I've been doing nothing for years.

I think it can be done in any gear, not really certain ( so chime in if you know ) on this but I "think" they do it in 4th so the tires don't spin on the dyno when you tromp on it.

Dec 9, 2004 | 09:03 AM

MIKER

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From: Tolar Texas

While strapped to a rear wheel dyno how do you prevent an automatic trans from downshifting into second gear at WOT?

Dec 9, 2004 | 09:33 AM

SanDiegoPaul

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From: San Diego - Deep Within The State of CONFUSION!

Quote:

Originally Posted by MIKER

While strapped to a rear wheel dyno how do you prevent an automatic trans from downshifting into second gear at WOT?

You DONT! The engine is brought thru the power band, and the trans is shifted at whatever RPM the owner of the car says to top it out at, or wherever power falls off whichever comes first. Kickdown doesn't even come into play.