weight??

[78c10 sleeper]

Hi guys im trying to get a estimate on my 78 C10 short beds weight. here's the specs it has a Sbc with iron heads alum intake,TH400 trans,12 bolt rear, no ac or power brakes or steering. I've also put a 10galuel cell in the bed, removed the front fender wells and anything unnecessary thing under the hood. It has kirkley alum seats but for now no cage or fiberglass any guesses on theweigh ? ? Thanks for the help guys
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[Super73]

3700-3800 with out driver.
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[franken]

Why not have it weighed? Zero dollars.
BTW, it's way more than a Camaro for example and has the aerodynamics of a house.
TH400 trans is strong, but inefficient. Rumor has it 30% power loss.

[vin63]

Originally Posted by franken

...
TH400 trans is strong, but inefficient. Rumor has it 30% power loss.

This is not true, the weight of a TH400 over a PowerGlide is made up by the extra gear, particularly in a heavy vehicle.

[78c10 sleeper]

Well I just got it back on the road I plan on getin it weighted asap how accurate are the scrap yard scales?? And I went with the th400 because its a 3 speed vs the 2 speed glide hopefully that extra gear gets the truck out the hole faster. I have a glide in my camaro but its alot lighter. I would have went withth the TH350 but the motor I building for it now should ne around 700hp so I thought the th400 was a good choice. Thanks for the replies guys.
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[Super73]

Originally Posted by vin63

This is not true, the weight of a TH400 over a PowerGlide is made up by the extra gear, particularly in a heavy vehicle.

This is debatable to a point. Put the proper converter in both transmissions and you might find the 400 is marginally faster off the line but the glide might be more consistant. One might also see more top end mph with the glide due to the weight and roatating mass.
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[78c10 sleeper]

Im pretty happy with converter I have nut when I change engines I may have to change it may buy one from pro tork there pricey tho
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[vin63]

Originally Posted by Super73

This is debatable to a point. Put the proper converter in both transmissions and you might find the 400 is marginally faster off the line but the glide might be more consistant. One might also see more top end mph with the glide due to the weight and roatating mass.
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I ran both a TH400 and PowerGlide in my fuel altered (~2700 lbs.) on the same tune, and I found that there was no real discernible performance difference. And, all the talk about rotating mass and weight is evened out by the mechanical advantage of the extra gear. Here are my timeslips from running both transmissions during test sessions (both trans were built and prepped by Mike Stewart of Mike's Transmission)...my car# is 7587. I believe the slight difference in ET and MPH is because the first half of the track was better prepped on the more recent pass.

TH400:


PowerGlide:


I agree about the consistency advantage, as I ran a PowerGlide in Super Gas/Street.

[Super73]

Your example is interesting, shows the pg 60'ed slightly better while the 400 mph'ed better. Any idea the difference in DA for the given days?
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[vin63]

There was about a 400' elevation difference since the more recent pass was run at night, but we make blower and fuel adjustments to compensate, so there was very little difference in power output.