The engine used in that prototype and the 1995 Classics and the first generation LFS are not ISC, since cummins only renamed their 8.3l engine after they change its mechanical rod injection governor to an electronic one
And let me point out why I think they should've used the ISM instead: because you mention the ISC as being closer to the 6V71N in terms of acceleration and the ISM seems to be the only engine that really can be compared to the 6V92TA.
Of course, with the changeover to the Cummins ISC and Voith D863.2-W7, the original rear axle ratio had to be swapped out as well; whereas the original rear end ratio is 5.38:1 (original tranny was the Allison V-731), for the Voith the rear end ratio has to be 4.56:1 if the bus is set for a max speed of 90 km/h (55.89 mph).
The ISM is known for its immense power (it descended from the earlier L10 and was a revamped M11E), but I think you're guessing is that the ISM is too large to fit in a Classic.
Of course, this experimentation with different powertrains isn't new: At MTA Maryland in Baltimore, MD, two 1982 Grumman Flxible 870s, originally with Detroit Diesel 6V-92TA MUI engines and Allison V-730 transmissions, were refitted with Cummins L10 engines and Voith D863.3 transmissions circa 1990.
The engine used in that prototype and the 1995 Classics and the first generation LFS are not ISC, since cummins only renamed their 8.3l engine after they change its mechanical rod injection governor to an electronic one
silverbrute750 2 months ago
@general682002
And let me point out why I think they should've used the ISM instead: because you mention the ISC as being closer to the 6V71N in terms of acceleration and the ISM seems to be the only engine that really can be compared to the 6V92TA.
ClassicTVMan1981X 1 year ago
First time, I've see a Classic with a Cummins engine!! She sounds excellent!!
masterproxl 1 year ago
Comment removed
silverbrute750 1 year ago
Comment removed
silverbrute750 1 year ago
Comment removed
silverbrute750 1 year ago
Of course, with the changeover to the Cummins ISC and Voith D863.2-W7, the original rear axle ratio had to be swapped out as well; whereas the original rear end ratio is 5.38:1 (original tranny was the Allison V-731), for the Voith the rear end ratio has to be 4.56:1 if the bus is set for a max speed of 90 km/h (55.89 mph).
ClassicTVMan81 2 years ago
But it would make the bus sound like a meaner Cummins-powered Flxible Metro.
ClassicTVMan81 2 years ago
Wow she sounds real smooth. Thats those C8.3/ISC engines for you
8v71buses 2 years ago
Do you think they could have used the ISM engine instead of the ISC?
ClassicTVMan81 2 years ago
Uh, obviously no!
general682002 2 years ago
The ISM is known for its immense power (it descended from the earlier L10 and was a revamped M11E), but I think you're guessing is that the ISM is too large to fit in a Classic.
ClassicTVMan81 2 years ago
Of course, this experimentation with different powertrains isn't new: At MTA Maryland in Baltimore, MD, two 1982 Grumman Flxible 870s, originally with Detroit Diesel 6V-92TA MUI engines and Allison V-730 transmissions, were refitted with Cummins L10 engines and Voith D863.3 transmissions circa 1990.
ClassicTVMan81 2 years ago
Cool, never heard a Classic with Cummins.
Jayayess1190 2 years ago
Wow, Sherman! I never thought there'd be an MCI Classic out there with a Cummins and Voith.
ClassicTVMan81 2 years ago