| [GMCnet] Tucson trip. 8.35 MPG with a 17, 300 GVW. Good for that weight I think. [message #332594] |
Sat, 26 May 2018 01:16  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma: 11
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Senior Member |
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78 Royale 403 with Howell/GM EFI with computer distributor spark control, stock exhaust system, and 3:70 FD. 3,497 miles round trip that makes up a good average. The Royale's are the heaviest GMC's at about 12,000lbs, Chevy Uplander handicap lift van on dolly. 5,324 lbs. Be interesting to see what we'd get not pulling anything. That never happens. As the rest of the time I'm pulling my enclosed 24ft race car trailer. That comes in at 24,000 GVW. Bob Dunahugh 78 Royale
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| Re: [GMCnet] Tucson trip. 8.35 MPG with a 17, 300 GVW. Good for that weight I think. [message #332596 is a reply to message #332594] |
Sat, 26 May 2018 09:01  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Bob,
I receive many comments from people that are running the 3.70 Final drive
ratio that have improve there performance and milage on both the 455 and
403.
It is all about the torque curve.
On Fri, May 25, 2018 at 11:16 PM, Bob Dunahugh wrote:
> 78 Royale 403 with Howell/GM EFI with computer distributor spark
> control, stock exhaust system, and 3:70 FD. 3,497 miles round trip that
> makes up a good average. The Royale's are the heaviest GMC's at about
> 12,000lbs, Chevy Uplander handicap lift van on dolly. 5,324 lbs. Be
> interesting to see what we'd get not pulling anything. That never happens.
> As the rest of the time I'm pulling my enclosed 24ft race car trailer.
> That comes in at 24,000 GVW. Bob Dunahugh 78 Royale
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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