Quote:
Originally Posted by THE EVIL TW1N
Post your dyno sheets then, show me these lower gear run's that you've done.
dyno's DO NOT read tq and factor in HP. it's the opposite. Otherwise a car with better rear end gears would always dyno higher. and that is not the case. If you leave off the ignition source to read RPM, the dyno will still pick up what the HP is, it just can't calculate tq, and will print out an HP graph based on speed (MPH).
another example is if a car reads 300 rwtq on a 1:1 ratio, then if the dyno really did go off of rwtq, a gear ratio of 1.4:1 would read 420 rwtq. I don't see any dyno graphs being anywhere near that off. Do you? if so, please post.
4th gear or whatever 1:1 is is generally used because it has the least parasitic losses (higher rwhp) and it also gets the best reading.
EDITED to remove some harshness.
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just to back up mrray13 he's been a beta tester for Trifecta Tune, ARH & Nallen Racing. His dyno sheets & MODS have been well documented on this forum.
regardless of the science behind dynos & why they vary so much between different machine results, the LLT has posted higher gains in 3rd compared to 4th gear.