08-29-2023, 01:59 PM
|
|
CC Member
|
|
|
Join Date: Jul 2022
Cobra Make, Engine:
Posts: 91
|
|
Not Ranked
Quote:
Originally Posted by Grubby
I have had both Tremec ODs. The .68OD was OK in ERA 755 with a VERY mild stroked 428. My current car, ERA 838 has the .81OD with a mild 496. Both cars had 3.54 rears and 295/50/15 tires.
838 wouldn't have been happy with the .68. The engine doesn't want to pull below 1800rpm and that would have made a .68OD only useful on the interstate and worthless on state highways.
The .81 is great for long trips, especially on 2 lane highways. On the interstate it does spin up a bit at 80mph, but most of our trips are on state highways.
.81 with 3.54 rear is a great choice for a Cobra.
John
|
Thanks for that info, my builder said the engine I have likes 2500 to 2600 rpm minimum so a .81 would put me at 80 to 83 mph. I guess that's a no brainer then. |
16Likes
Threaded Mode
