Originally Posted by fast68plymouth
4900 should work fine.

Maybe try it a few more times if you can before going to the track to give the EFI more time to learn it?
(I don’t know if that’s how it works or not)


Yes that is what it does, you are correct I need to drive it & load it up. with this 4.1 gear on the street it does not BLOW the tires off as bad, they still spin but more controlled, you can see on the 2nd Data log when I nailed it in 1st gear the rpm went 6k The red line just for .5 second & then the car hooked & the rpm came down to 5100 ish.

Last edited by csk; 07/08/20 05:08 PM.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5