Thunder
3/4 ton status
MuddinManny said:
Absoulitly. A TBI 383 with stock TBI 193 heads a mild Comp cam, 1.6 rockers, stock intake , headders. Will pull the doors off any old 6.5-6.2 rattler. And still get the good MPG of a TBI 350.
CK5
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Best Engine For Economy vs. Grunt
- Thread starter Inu-Hanyou1776
- Start date
Absoulitly. A TBI 383 with stock TBI 193 heads a mild Comp cam, 1.6 rockers, stock intake , headders. Will pull the doors off any old 6.5-6.2 rattler. And still get the good MPG of a TBI 350.
BlazerBud
1/2 ton status
Why turbo the 6.2? They are good naturally aspirated if your talking about finese on the throttle. If you want a turbo diesel, don't build up a 6.2, just get 6.5 turbo or a Cummins. You could buy a used Cummins cheaper than the turbo kit for a 6.2. The trick to mileage is drive slow. Regardless of the powerband or sweetspot on the torque curve, In a lifted full size heavy truck, the wind resistance at 75 MPH vs 55 MPH is going to equal about 7 MPG difference. Gear the truck to keep the 6.2 at 1200 RPM at 55 MPH and you'll be getting 20 MPG.
Inu-Hanyou1776 said:
6.2 diesel has about the same torque as a 305 gasser - so there is no "extra" torque to worry about. 6.2 will carry whatever torque it has to lower RPMs, but its peak torque is not higher. The 700R4, for any use, had a high failure rate up to around 1985 - and it then got improved.
In regard to factory 700R4 setups - just about all civilian K5s with 6.2 diesel - if auto - came with 700R4s. Same goes with most other 1/2 ton trucks, vans, suburbans, etc.
In regard to WVO - it can work fine under certain circumstances. But, if you have to rely on, and pay someone else to do your repairs - especially injector and injection pump, it is likely to cost you more money in the end. It is very easy to trash a Stanadyne rotary pump with WVO unless you are very careful about it.
In regard to high fuel mileage claims that are often made? I've been working on 6.2s, as a prof. mechanic since they were invented. Also own over 40 of them (trucks, K5s, and Suburbans). I've have never known of, or driven a K5 that could do better than 23 MPG on the highway - or 16 MPG around town. If you have stock tires, stock chasis height, and can keep the RPMs below 2200 RPM at highway speeds - you can easily get better than 20 MPG.
My 3/4 ton 4WD Suburbans, with TH400 autos and 3.73s all get at top fuel mileage of 19 MPG in the Northeast - and drop to around 17 MPG at very high elevations. 13 MPG around town.
My absolute best fuel mileage 6.2 is an 82 1/2 ton, K10 pickup with 3.08 axles, stock 15" tires, and a NP833 overdrive four-speed manual trans. It has gotten about 24.5 MPG on its best run. I assume if it was 2WD, it would do even better.
By the way, I'm talking U.S. gallons, not Canadian.
BlazerBud
1/2 ton status
johndem said:
Didn't you know it was illegal to own 40 diesel engines, I won't tell anyone if you give me several of them, and neither will anyone else.
BlazerBud said:
I live in an area where they often rust out before they wear out. I've been given many for free and others in the $50 -$100 price range. I've got 60 acres of land, so it's doesn't hurt to save them. I've only got 8 trucks with 6.2s that are all fixed up and road-worthy. Most others are eiher future projects or parts machines.
Also got two Ford-IH diesels - 6.9 and 7.3 turbo, two Volkswagen Jetta diesels, two Chevette diesels, and one little Isuzu P'UP 4WD pickup with a 2.2 diesel.
BlazerBud
1/2 ton status
johndem said:
Sounds like my kinda place. Since you've given me a choice, I'll take one of the fixed up trucks
You are the diesel MAN. Seriously, do you have any 6.2's that you could part with for fairly cheap, or should I look local. I've got a 6.0 Powerstroke in my Ford that is tuned up and I want to swap a really mild diesel into my Blazer.
ratpack_7
Registered Member
I dont know if anyone else brought this up. but the chevy inline 6 250cid gets good fuel milage and has good low end (Net Torque lbs. ft 220 @ 1600 rpm) and it bolts up to the th400.
BlazerBud
1/2 ton status
ratpack_7 said:
I always thought it would be neat to run 2 inline 6 engines side by side coupled to a 2 x 1 drive system and use one transmission. twin 250 cid's or better yet, twin cummins.
BKinzey
1/2 ton status
Ummmm What's going on
The last post in this thread is dated 4-19-07.
Yet it appears as the 5th most recent post in The Garage on the 4th of July
Over 2 1/2 months later?????
WTF?
The last post in this thread is dated 4-19-07.
Yet it appears as the 5th most recent post in The Garage on the 4th of July
Over 2 1/2 months later?????WTF?
This was the motor I was gonna suggest, too.ratpack_7 said:
I ran a 250 in front of a 465/208 combo with 3.73's in the 10 and 12 bolts. Mileage was 18 on the highways.
Stomis
Professional Amateur
Since someone vote resurrected this I'll ask, Has anyone gotta say a 4.3 tbi setup to work on the 250 inline?
G
gravedigger472
Guest
Paxx
do you really get 17-20MPG with a caddy V8? what year engine/size and specs of truck?
i have a stock 1970 472 in my C10, TH400 2.73 gets only 10mpg
do you really get 17-20MPG with a caddy V8? what year engine/size and specs of truck?
i have a stock 1970 472 in my C10, TH400 2.73 gets only 10mpg
K5dreamer
1/2 ton status
OP wanted 17-20 mpg and wasnt concerned about being able to do burnouts.
buy an M1009 and be done with it.
my truck is 23 years old, has 33in tires, 3.08 axles, a TH400 with no overdrive or lockup converter, and a non turbo'd 6.2L. and on the highway at 55-60 i get 20+mpg. kicker... i bought it for 1500 bucks. granted i put a few thousand into it to make it reliable, but for less than 4000 bucks youll have the truck youre looking for, and it will be quite trail capible. do like im planning, and do a shackle flip and front 52in springs, and youll have a pretty awesome all around rig.
buy an M1009 and be done with it.
my truck is 23 years old, has 33in tires, 3.08 axles, a TH400 with no overdrive or lockup converter, and a non turbo'd 6.2L. and on the highway at 55-60 i get 20+mpg. kicker... i bought it for 1500 bucks. granted i put a few thousand into it to make it reliable, but for less than 4000 bucks youll have the truck youre looking for, and it will be quite trail capible. do like im planning, and do a shackle flip and front 52in springs, and youll have a pretty awesome all around rig.
