My engine issue

synolimit · 01-31-2014, 12:05 AM

Quote:

Originally Posted by phunk

I am confused at the route of our conversation now... In summary, what I am saying is that a 370z in first gear making 180 torque, will accelerate faster than a 370z in 2nd gear making 250 torque.

180 x 14.01 = 2521
250 x 8.58 = 2145

If you were wondering, 14.01 and 8.58 are the torque multiplication factors of a 370z 6MT in first in second gear with stock final drive.

Do not worry about how fast the RPMs climb, worry about how fast the speed climbs. You are totally overlooking the point of a transmission and final drive.

Rpms=speed though. You can't go faster or slower in 3rd at 4000rpm. That rpm will always equal that same speed unless you change gears, tires etc.

All I'm saying is "if" from 4500-5500 it takes me 1.4 seconds and I shift into 4th vs you going from 5500-6500 and that takes you 2.0 seconds, then you shift into 4th, I'll have been in 4th still in the power 2.0 seconds ahead of you. I get what your saying about gear ratios and the math.

I'll plug the numbers in you gave me and see. But again, if you come out on top shifting later to stay in that gear longer (even though your speed is climbing slow because your powers dying, but I get I could be climbing even slower being in a higher gear), it's still not worth the risk or money dropped. I'll gladly take a back seat to your 1 second faster lap time or 1/10th of a second faster at the strip.

Luckily though this car makes power to 7500rpm and not a lot of dry sumps out there so all we're left with is math vs math

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