Considering the 5th gear is 0.97 and 4th is 1.161, I'm guessing I should do my pulls in 5th gear?

 

4th...i did mine on the 4th

 

I've always done mine in 3rd, to reduce the time that the engine is at 100% load and thereby reduce the amount of head produced. The S2000 transmission does not have any gear that's 1:1, so they're all pretty much equal when it comes to losses. On some transmissions that had a 1:1 ratio for one of the gears, it was simply a direct engagement of the shaft, no gears involved at all, which is why it showed less loss. Again, our transmissions don't work that way.

 

I have an AP1, pull in 4th with AP2 transmission. Not sure how close that is to 1 to 1

 

i've been told you should do pulls in whatever gears tops out closest to 100mph.

maybe that's the quick and dirty way to find the gear closest to 1:1??

 

ap1

R:2.8
3.133
2.045
1.481
1.161
0.971
0.811

actually the fifth gear is closer to 1.00(-.029 vs 4th gear .0161), but most tuner never use a overdriven gear for dyno for some reason.



ap2

R 2.8
3.133
2.045
1.481
1.161
0.943
0.765

 

try a 3rd vs 4th vs 5th and post the numbers....

 

I did mine one time in third and twice in fourth.

I got 290 something in third and 310 in fourth on a dynojet.