GMC V-12

[jeeper61]

 

 

[lotsaIHCs]

The twin 6 truck engine.

[sandhiller]

Not fair posting pics without a "music video"😄

[mikem]

Back when dirt was new, I had a GMC 1/2 ton with a V-6. THIRSTY!!!!!!!!!!!

I can't imagIne how much go-juice that V-12 would take.....I BET IT SOUNDS SWEET THO---

mIKE

[poor farmer/logger]

Buy king of obsoletes and you can build one of your own too.  He sent his south a few weeks ago to be sold unfortunately. Was hoping he’d get it going but he gave up when parts got expensive and hard to get. 

[806 man]

GMC v-12  with X-hood , sweet

[sandhiller]

7 hours ago, poor farmer/logger said:

Buy king of obsoletes and you can build one of your own too.  He sent his south a few weeks ago to be sold unfortunately. Was hoping he’d get it going but he gave up when parts got expensive and hard to get. 

I really enjoy his videos, always interesting 

[DWV]

8 hours ago, mikem said:

Back when dirt was new, I had a GMC 1/2 ton with a V-6. THIRSTY!!!!!!!!!!!

I can't imagIne how much go-juice that V-12 would take.....I BET IT SOUNDS SWEET THO---

mIKE

Remember some articles about them that said about 3 miles per gallon in heavy trucks. 

[DT Fan]

41 minutes ago, DWV said:

Remember some articles about them that said about 3 miles per gallon in heavy trucks. 

That doesn't seem too bad really. The 366 in my C-70 probably flirts with about three mpg loaded!

[hardtail]

3 mpg might be a bit high, I think KOO had said and it wasn't 1:1 but it wasn't far off

[jeeper61]

It is hard to imagine that a Rochester 2 barrel can flow that much gas.

Looks like they have a couple of big Holley 2 barrels on that one 

[DWV]

2 hours ago, DT Fan said:

That doesn't seem too bad really. The 366 in my C-70 probably flirts with about three mpg loaded!

Back in 1980 or 81 the company I worked for had a C-70 tandem 427 with a 5 speed and 3 or 4 speed axillary can't remember for sure which now. Never checked the MPG because of company tank with no readout. Wasn't good though. 

[DT Fan]

I was going to check the mileage on it last fall but never got the darn thing full! Stupid pumps shut off at a hundred $$. Maybe this year?

[hardtail]

3 hours ago, DWV said:

Back in 1980 or 81 the company I worked for had a C-70 tandem 427 with a 5 speed and 3 or 4 speed axillary can't remember for sure which now. Never checked the MPG because of company tank with no readout. Wasn't good though. 

I lent my buddy a Holley 750 double pumper in the 80's and he put it on the 427 and said it ran awesome but he couldn't afford to run it

[jeeper61]

We will need @AngrySailor to do a MPG check on his BBC, it's got a large Holley on it

His figures will be more like GPM 

[DT Fan]

15 hours ago, jeeper61 said:

We will need @AngrySailor to do a MPG check on his BBC, it's got a large Holley on it

His figures will be more like GPM 

GPM, gallons per mile or minute!?

[hardtail]

@King of Obsolete said 1.5 mpg with the V12 😳

[oleman]

I worked at a gas station in 60, owner ran a 57 Ford F900 gasser tractor that I was supposed to fuel-up before every trip. Hauled fertilizer on a 40' flatbed in 200# bags in season.  I caught heck for failing to fill the aux tank, main tank was dry after 40 miles, believe the tank was 40 gallons and I believe  engine was a 391 (What ever the big dog was in 57) Ford.  None of the large gasser engines got economy, no one cared because gas was only $.16 per gallon. The real issue was carrying enough fuel to get to the next fuel stop.   It was much cheaper to operate a gasser in 1960 than a Cummins load equivalent today.

[DWV]

1 hour ago, oleman said:

I worked at a gas station in 60, owner ran a 57 Ford F900 gasser tractor that I was supposed to fuel-up before every trip. Hauled fertilizer on a 40' flatbed in 200# bags in season.  I caught heck for failing to fill the aux tank, main tank was dry after 40 miles, believe the tank was 40 gallons and I believe  engine was a 391 (What ever the big dog was in 57) Ford.  None of the large gasser engines got economy, no one cared because gas was only $.16 per gallon. The real issue was carrying enough fuel to get to the next fuel stop.   It was much cheaper to operate a gasser in 1960 than a Cummins load equivalent today.

Just going by memory that could be off. Think it was later than 57 for a 391. Late fifties I think the 401, 477 and 534 could be installed in heavy ford trucks. Some still used In the mid-seventies to haul dirt on big building sites in my area in lower gears. Fuel truck was used on job site. Made a lot of noise, maybe because the exhausts needed work. Was usually digging dirt so didn't drive one.

[yellowrosefarm]

Our 2018 F650 with a V10 gas at work is averaging 3.9mpg according to the digital readout. So, everything old is new again!

[yellowrosefarm]

 

[F-301066460puller]

5 hours ago, yellowrosefarm said:

Our 2018 F650 with a V10 gas at work is averaging 3.9mpg according to the digital readout. So, everything old is new again!

Didn't know they put that in a 650... better have a low rear-end and lots gears

[Lars (midessa)]

My first fuel delivery truck was a F-800 with a 361, and a 5x2 transmission. No power steering, no a/c, no radio. 2000 gal Brownie tank, 4 compartments, dual hose & meters, dual pto.

[jeeper61]

6 hours ago, yellowrosefarm said:

 

Love the open exhust with the gas can sitting right there 

He should have put  it on the side that was throwing flames 

[yellowrosefarm]

1 hour ago, F-301066460puller said:

Didn't know they put that in a 650... better have a low rear-end and lots gears

We have an F750 with the same setup and they both work great. No idea on the rear gears and both are auto, of course, but no complaint about lack of power.  The 650 replaced a drop kick with a 454/allison, and is a huge improvement. The750 replaced another drop kick with a CAT 6 cylinder. Maybe about equal feel powerwise, but we have had way less repairs with the V10 truck.  We are getting a Chevy 6500 4 wheel drive in the very near future. They are putting the body on it now. Also gas, not sure on which engine.