nv4500 vs 400turbo with gearvenders od!

[hungry joe]

ok, would anybody know what gas mileage would be with 410grs, nv4500,or 400turbo with GVenders od,witch turns 410s into 320s.i have a 79 1ton 2wd,and a 84 3/4 ton drive train,454engine semi floater rear same 410grs, might put the 79 body on the 84 chassie. big advantage with the 400th,is I don't have to shift it! and the OD of coarse!

 

[Jrgunn5150]

The GV OD ratio is .78:1, without a locking converter of course. A NV4500, Chevy, is .73:1, with full clutch lockup.

A 4L80E is .75:, with a locking clutch, and you don't have to shift it.

 

[hungry joe]

thanks jr,good to know! will starting this building may!

 

[SquareRoot]

To your question- gas milage will still suck no matter which one you choose. Your pushing a 6 ton brick down the road. The small difference in milage between the three won't be discernable.

If that's an issue consider a Prius or the new Chevy Bolt.

 

[Madhorn]

For what it is worth. I am running a 2003 5.3 in my 77 K10 with a NV4500, 4.56 gear and 35in tires. My last mph check was 15.6.

 

[eskimomann209]

For what it is worth. I am running a 2003 5.3 in my 77 K10 with a NV4500, 4.56 gear and 35in tires. My last mph check was 15.6.

That is a junk setup man....
Wanna sell me your nv4500?

 

[Madhorn]

Thanks. But I am good. It has been a great project and really is fun to drive. Pic from last summer.

You must be registered for see images attach

 

[hungry joe]

hey ken, that's not bad at all! by the way,that pile of dirt on the floor looks just like my garage!

 

[Madhorn]

Oh man !!!! You weren’t supposed to see that.

 

[DoubleDingo]

My '65 Crusty Biscuit, just as much of an air-pusher as these trucks, has 4.57 rear end gears and a 30% OD that drops those 4.57's to 3.19's. It has a stock 350 with a torquey cam, that's it. It gets 12-13 out of OD, 14-15 in OD. It likes about 2,600 rpms, that's the sweet spot and is keeping up with everyone around us. You're not going to get great mileage, but it can be improved upon to a point. My old '65, Mean Green had a stock crate engine, SM420 and 3.54 gears and got 16 cruising 70 mph. 3.54's sucked for climbing steep grades but that truck hauled ass!

 

[hungry joe]

thanx to everybody,while trying to figure what to do with this one, I just bought a 86 k5 blazer,needs gas tank n carb,i was looking hard at it today, and found out its got a new goodwrench 350 in it!!! hasnt ran it 10yrs, but I cant waite to get it home and get started on it! arranged for shipping today, I love getting these old trucks running again!!