Do you have any pics of the 6.2 in the truck? I was originally going to put a 350 in but I may have a line on a whole donor truck with a fresh rebuilt 6.2
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Do you have any pics of the 6.2 in the truck? I was originally going to put a 350 in but I may have a line on a whole donor truck with a fresh rebuilt 6.2
I didn't really take a lot of pictures of the engine as it was already installed when the truck arrived, I only took pics of the mods I did. If you watch the video in the other post I did about this build you can see a good underhood shot.Quote:
Originally Posted by Alaska hunter
If you were planning on a 350, the 6.2 will sit in the exact same spot. Same bellhousing, same motor mounts.
And when he says exact same spot he means it. The 6.2 was originally designed specifically to fit anywhere a 350 could fit so they wouldn't have to redesign vehicles to start offering them diesel powered. I put a 6.2 in mine and have been pleased with it (when it's been running that is... first I had a fuel leak, now I have a radiator leak... :) )Quote:
Originally Posted by randyscycle
The motor mounts are the same, transmission bolt pattern the same, fuel pump location the same with the same size lines, oil pan the same if it is a civilian or CUCV 6.2, oil filter and starter in the same spot too.
I made a big effort to not run the 6.2 in my M1009 over 2000 rpm down the highway the entire last fuel tank full. That meant 60 mph top speed. I filled up Sunday. 25.1 mpg.
2200 rpm self imposed max speed gives me 22-22.5 highway mpg numbers. 2200 rpm and another 2500 pounds of trailer and stuff behind it get me down to 18-19 mpg.
According to the data plates, the M1009 and the M715 are less than 500 pounds different from each other. They are both shaped like bricks too, so the results could be the same if driven similarly.
Gasoline hit $2.85 here today. With the 396 having trouble breaking out of the single digits when it comes to mpg on the new near gasoline. I have a hard time planning any drives that involve it these days.
The truck this thread is about has a NV4500 so with stock axles and 11.00-16 Michelin tires it had on it the last time I looked at the truck in person. 2000 rpm would be 54 mph just like my 396/NV4500 M715. Now that it has been changed out to better stuff, I don't know what his rpm to speed numbers are. However, I am sure he will come out with a truck as cheaply driveable as his M1009 currently used by his daughter.
When I got the truck Tom Lawler had already regeared the rear to 4.56 and put locking hubs on front axle (it was still stock gearing). I ran a bazillion gear calculations before doing the axle swap targeting 2000-2500 rpms's at 70 mph in 5th gear (.70) and chose 5.13 gears to go with 40-44" tires I planned to run. I temporarily had 42" Swampers on it and have been very disappointed in the rpm's I am turning (Randy installed a tach and pyrometer). I am in 5th gear (OD) by 45 mph and pushing 3,000 rpm's at 65 mph.:( I don't know what is up with my gear calculators (ran three different ones) but 5.13 is too steep for 42" Swampers! If I ever get the 11.00R20 XL's mounted I will see what difference they make but they are only 43" in diameter!Quote:
Originally Posted by Barrman
Richard
This is a dumb question, but have you measured the swampers? I bet they might not be 42
that seems weird to me. i have the same tranny, and with 39.5" tires that have a true radius that puts them closer to 36.5" and 4.56 gears i turn no where near 3000 on the road ever. i can easily hit 70 and i am under 2500. not to discredit randy at all, but is the tach being triggered correctly?Quote:
Originally Posted by Grantshire
The tach is of course a diesel tach which picks up a signal from the alternator. It was checked with an optical type tachometer when I calibrated it, so it is as accurate as an inductive tach can be. However, that being said, the pyrometer doesn't lie. The temperature at that speed seems to run around 1000 degrees or so. It will push 1100 and the engine certainly sounds as if its doing 3000 RPM.
I wonder what the ratio of the overdrive in that NV4500 is? The gears are most definitely 5:13 as I installed them myself. The tires I don't recall of I actually did measure them, but I am pretty sure they are closeof not spot on at 42", because they are definitely taller than the Michelin XL's on my truck at 39.5" tall.
Pretty sure it's .73 for all nv4500s dodge and chevy. I had. Nv4500 in my baby jeep for years with 4.88s and 35" tires behind a 5.2L. It's been a few years since I took it out but I do remember not using 5th gear a lot (swapped it for a tf999). Seems like you would be fine with 5.13s 42s and the overdrive.
As Randy said, tires are very close to 42" and tach seems close based on engine noise and pyro. BC shifts through the gears quickly and is in 5th (OD) by 45 mph. I have 4.10 gears with 35" tires in my Scrambler with a T5. 70 mph is only about 2800 rpms so the 5.13 gears should be right for BC's 42" tires and NV4500.