993 cruising speed.....

[mede8er]

Just curious but my 3.6 hooked up to a 915 cruises @ 75mph @ 3300rpm.....

What does your 6 speed put out in 5th gear @3300rpm.....

[Bill Verburg]

A stock US g50/20 w/ 255/40x17 @3300 is doing ~92mph , 2500 it is doing ~70mph

my g50/30 w265/35x18 @3300 is doing ~82mph, 2500 it is doing ~62mph

my 915/67 w/ 275/40 x17 @3300 is doing ~85mph, 2500 it is doing ~64mph

[mede8er]

Thanks Bill....BTW I should have mentioned 245/45/16's.......

I had a feeling I should have been turning between 2500-3000 @ 75......

The PO may have gone in there at some point.....

[Bill Verburg]

No, a 915/63(oem US '82SC) has a 0.821 5th, w/ 245/45 x16 that works out to ~75mph @3300