| another trip report [message #62351] |
Thu, 29 October 2009 19:35  |
klassic kampers
Messages: 93
Registered: July 2008
Location: greer,s.c./ellijay,ga
Karma: 0
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last week we took the '73 gmc on a 1200 mile round trip towing the miata...........
left greer,s.c. and drove to first landing at virgina beach for two nights and then to stafford,va for three nights.....the stafford,va campground had sewer and cable hook ups but we were one of the few vehicles there less that $100k........a lot of big boys there......the gmc towed the miata just fine never even having to get into the secondaries on the q-jet(yes true).......the trans spit no fluid out and after stopping for a break I could place my hand on the radiator which was suprising.....we do have the correct thermostat......no more road wander as truck ruts did not bother the gmc, but a couple of times the wind got ruff.......it did digest 1.5 qts of oil however......9.5-10 mpg on the trip up as the tanks were filled in greer,s.c. with "real"(no ethanol) gas.....8.5-9 mpg after first fill up on 90/10 blend.........both mpg figures with miata and all of our gear in tow......................
...here are the specifics on our 1973, but are not intended to influence anyone to prepare their motorhome as such ....I just find other gmc owner's specs interesting for future improvemnts on my gmc
1973 gmc canyonlands with 120k on the original crank, rods and pistons.......................................................
stock rebuilt trans with 3.07 final.........................
new timing chain and real 3-angle valve job 3k miles ago.......
while the heads were off we surfaced the exhaust manifold flanges.........................................................
non leaking stock exhaust manifolds........................
intake manifold crossover welded closed with cast iron plugs............
1978 firebird t/a q-jet carb modified(by me) for the motorhome.......
stock points distributor with the coil mounted on the rear firewall under the hatch(away from the heat of the stock location on the cylinder head)..................................
steering box perfectly centered with the rear wheels and using the stock alignment specs......................................
65lb air in front tires and 50lb in the rears(might need a few pounds more here)..........................
it was a fun trip as we were suprised how well the gmc towed the miata at any speed and even impressed my sometimes unimpressible wife by not having to open up my tool box........................
mike stewart, greer,s,c......
Mike Stewart
1973 GMC 26' Canyonlands /
1973 B.S.A. B50 street tracker-----
Greer,S.C/Ellijay,Ga
[Updated on: Thu, 29 October 2009 20:09] Report message to a moderator |
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| Re: [GMCnet] another trip report [message #62355 is a reply to message #62351] |
Thu, 29 October 2009 20:05  |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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Thanks for the report.
Please tell us more about the carb and the mods you made.
Interesting mounting the coil on the firewall.
Dennis Sexton
73 GMC
Germantown, TN 38138
USA
-----Original Message-----
From: mike stewart <klassickampers@hotmail.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, Oct 29, 2009 7:35 pm
Subject: [GMCnet] another trip report
last week we took the '73 gmc on a 1200 mile round trip towing the
iata...........
eft greer,s.c. and drove to first landing at virgina beach for two nights and
hen to stafford,va for three nights.....the stafford,va campground had sewer
nd cable hook ups but we were one of the few vehicles there less that
100k........a lot of big boys there......the gmc towed the miata just fine
ever even having to get into the secondaries on the q-jet(yes true).......the
rans spit no fluid out and after stopping for a break I could place my hand on
he radiator which was suprising.....we do have the correct thermostat......no
ore road wander as truck ruts did not bother the gmc, but a couple of times the
ind got ruff.......it did digest 1.5 qts of oil however......9.5-10 mpg on the
rip up as the tanks were filled in greer,s.c. with "real"(no ethanol)
as.....8.5-9 mpg after first fill up on 90/10 blend.........both mpg figures
ith miata and all of our gear in tow......................
...here are the specifics on our 1973, but are not intended to influence anyone
o prepare their motorhome as such ....I just find other gmc owner's specs
nteresting for future improvemnts on my gmc
1973 gmc canyonlands with 120k on the original crank, rods and
istons.......................................................
tock rebuilt trans with 3.07 final.........................
ew timing chain and real 3-angle valve job 3k miles ago.......
hile the heads were off we surfaced the exhaust manifold flanges.........................................................
on leaking stock exhaust manifolds........................
ntake manifold crossover welded closed with cast iron plugs............
978 firebird t/a q-jet carb modified(by me) for the motorhome.......
tock points distributor with the coil mounted on the rear firewall under the
atch(away from the heat of the stock location on the cylinder
ead)..................................
teering box perfectly centered with the rear wheels and using the stock
lignment specs......................................
5lb air in front tires and 50lb in the rears(might need a few pounds more
ere)..........................
it was a fun trip as we were suprised how well the gmc towed the miata at any
peed and even impressed my sometimes unimpressible wife by not having to open
p my tool box........................
ike stewart, greer,s,c......
-
973 GMC 26' Canyonlands &
1965 Chris Craft 18' V-8 powered Super Sport wooden fun boat
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] another trip report [message #62364 is a reply to message #62355] |
Thu, 29 October 2009 20:40 |
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WD0AFQ
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
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Senior Member |
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That's a two thumbs up report.
Thanks,
Dan
3 In Stainless Exhaust Headers
One Ton All Discs/Reaction Arm
355 FD/Quad Bag/Alum Radiator Manny Tran/New eng.
Holley EFI/10 Tire Air Monitoring System
Solarized Coach/Upgraded Windows
Satelite TV/On Demand Hot Water/3Way Refer
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