8v92 rebuild

TomC · December 18, 2019, 07:11:01 PM

The kicker is, the Caterpillar 3406C (updated 3406B) mechanical is still being made for third world countries that don't want electronics. This is a big reason I'm converting my Kenworth truck. Good Luck, TomC

CrabbyMilton · December 19, 2019, 04:44:01 AM

I wonder if DETROIT ever thought about a 6-92 back then? it would have been easy to fit one in a 4104 and give it a power boost.

sledhead · December 19, 2019, 05:05:43 AM

all this talk about the 3406 is making me blush !

dave

chessie4905 · December 19, 2019, 07:29:19 AM

If they did, I wonder how many angle drives would've been wiped out?

luvrbus · December 19, 2019, 07:44:33 AM

Quote from: chessie4905 on December 19, 2019, 07:29:19 AM
If they did, I wonder how many angle drives would've been wiped out?

A bunch

TomC · December 19, 2019, 08:34:21 AM

Detroit didn't make the 6-92 since they had already made the 6-110. But if they had made a 6-92, then a simple solution would be to use the 4106 transmission or a V730 to take the power. I'm running a V730 with 8V-71T with air to air intercooling putting out 375hp and 1125lb/ft torque (7G75 injectors). Shifts fine and runs well. Good Luck, TomC

luvrbus · December 19, 2019, 10:14:10 AM

The V730 had upgrades made to it just like any other Allison to handle the torque,that is one reason they did away with the spacer between the transmission and the engine then changed the angle on the V drive rear gear pumpkin .One thing I don't like a V730 is the heavy flywheel on the back of the 2 stroke for a V730 it takes a toll

chessie4905 · December 19, 2019, 12:07:59 PM

Other than rpm, Tom, why didn't you just build up a 375 to 380 hp 8v-92? It would last longer than the jacked up 8-71 and maybe less heat.

TomC · December 20, 2019, 09:56:50 AM

Because of the mounting, you can't use a 8V-92 with a V-drive (except with massive modifications). I don't like the 92 series because of the wet liners that can leak when left standing for weeks. Both the 71 and 92 series have the same bearing sizes (Cliff will correct me if I'm wrong). The 8V-71 REALLY wakes up with turbocharging. If I had rebuilt the engine to turbo specs (still has the 18.7:1 pistons) I would have gone with 7G80 injectors (like Detroit made in their last incarnation of the 8V-71) that would have givin me 400hp and 1200lb/ft torque. 71 series don't really need to worry nearly as much about coolant like you do with the 92 series. Good Luck, TomC