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| | | | Joined: Nov 2010 Posts: 22 New Guy | | New Guy Joined: Nov 2010 Posts: 22 | We wanted to recondition our '49 Burb to keep the original design philosophy with updates like disc brakes and a big 6 made for unleaded gas. I ended up with a Clifford Research 292 (4-bbl & headers) and Getrag 5-spd bought together for $2500. Looking around the web I find reference to 11 mpg being what to expect. Can anybody tell me what mileage they observed with a 292? Of course it's too late now to choose something else, but I would be interested to hear about other folks' observations regarding mileage and performance of the 292. | | | | | Joined: Feb 2004 Posts: 29,803 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,803 | What rear end ratio, and what gross weight vehicle are we talking about? Big sixes aren't famous for good gas mileage. The 292 we ran in a 1-ton dump truck got about 10 MPG, loaded or empty. With the OD 5 speed, I'd guess you might get into the mid-teens, maybe 15 or a little more at best.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | We pulled our sprint car with a 68 3/4T with a 292, 4.56 rear, BW OD and it was one of the best tow vehicles we ever used but never got better than 13mpg. Final drive ratio in OD was 3.20 and used 30 inch tall tires. Had a killer a/c unit and wish we still had it.
Evan
| | | | | Joined: Nov 2010 Posts: 22 New Guy | | New Guy Joined: Nov 2010 Posts: 22 | Vehicle is a '49 Burb. I don't know the rear end ratio (10 bolt Chevy truck rear end) with Getrag 5-speed. At some point soon I plan to have the 3rd member checked out at the local ring & pinion shop. 15-16 mpg would be something I could live with. | | | | | Joined: Feb 2004 Posts: 29,803 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,803 | Just drop the rear axle cover plate and look for a series of numbers stamped on the perimeter of the ring gear. For instance, a 37-10 sequence would be a 3.70:1 ratio, 37 teeth on the ring gear, 10 on the pinion. a 41-10 would be a 4.10:1, etc. With the overdrive trans a rear end ratio between 3.30 and 3.70 would probably be ideal. The 292 has a lot of torque so a fairly high final drive ratio would be possible.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I used to service step vans many with 292's. The larger ones got 10-12 mpg. The smaller ones about 14. I think with everything set up right you should get 15-16 mpg.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Oct 2013 Posts: 331 Shop Shark | | Shop Shark Joined: Oct 2013 Posts: 331 | I had a 292 in a '77 K20 with 4.10s and a 3-speed automatic. For the longest time I thought there was a hole in the gas tank. lol
1950 4100 - unrestored and driven weekly for almost no reason at all.
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