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Snake98
12-09-2002, 06:52 PM
I have had 4:10's in my car for six months now and I love them. I was wondering how much they affect dyno results? I had 3:27 before, how much power loss/gain will can i expect at the dyno with the 4:10's? No other mods were done since last pull. Thx -Rob

Ken 01-Cobra
12-09-2002, 07:05 PM
According to everything I read on the subject, the 4.30's I put in would affect the dyno results between 3-5%, or about 9-15 RWHP lower than actual. Since my last dyno after the 4.30's and a chip reburn said 304 RWHP, I *HOPE* that is right! ;) I would assume that 4.10's might be just a little less than that.

Nate95125
12-10-2002, 07:32 PM
Gears will improve your 1/4 time (improve acceleration), but make no difference on the dyno. You are not increasing horsepower...just multiplying what horsepower you have to the rear wheels by changing the gears in the differential.

Ken 01-Cobra
12-10-2002, 09:37 PM
Originally posted by Nate95125
Gears will improve your 1/4 time (improve acceleration), but make no difference on the dyno. You are not increasing horsepower...just multiplying what horsepower you have to the rear wheels by changing the gears in the differential.
This link is from the folks at DynoJet. Since they make the equipment that most of us use to dyno our cars, I'll take their word for it! ;)
http://www.shane.roberts.net/dynojet.htm

The link came from this thread at The Corral:
http://www.corral.net/forums/showthread.php?s=&threadid=120682

Nate95125
12-12-2002, 03:30 PM
Hmmm...thanks for that...I think the underlined portion is the point I was trying to make, but thanks for the other info.:)

Ken 01-Cobra
12-12-2002, 06:43 PM
Originally posted by Nate95125
Hmmm...thanks for that...I think the underlined portion is the point I was trying to make, but thanks for the other info.:)
Gears DO make a difference on the dyno. They DON'T make a difference in the actual HP of the car. ;)