RPM seem kinda high on the highway, i'm wondering if that's normal. I have a ZF tranny from e36 M3 and the 3.25 LSD differential from a 535i (e28). at around 70mph in fifth gear i'll be between 4k and 5k. what should i do to lower that? is the ration i need to change in the tranny or in the differential?
-
-
Assuming OE sized tires at 70mph the engine speed should be right about 3250rpm for that transmission (1:1 5th gear) and differential ratio. Engine speed would be about 4250rpm with a 4.10. So something isn't right.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL -
sorry forgot to mention i have schrick cams too.Comment
-
To run the E28 3.25S, did you just have to swap the cover to an E30 cover, or did something else have to be swapped as well?Comment
-
Cams make no difference in engine speed vs ground speed.Originally posted by E30_80Y View PostThe car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
-
the previous owner of the diff had already done that for me, but i think you have to change the cover and the flanges that holds your axels.Originally posted by phenryiv1 View PostComment
Comment