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07-25-2005, 10:46 PM
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#1 |
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7000 #'s of american IRON
Join Date: Dec 2004
Location: north tx
Posts: 883
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Engine specs?
does anyone have the factory HP and torque specs for a 1977 GMC C3500 camper special Sierra Classic 454? I'd like to know what our engine had stock..
and does somebody know if it was equipped with smog? ours isn't. |
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07-26-2005, 11:11 AM
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#2 |
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Professional Beer Tester
Join Date: Aug 2004
Location: Louisiana
Posts: 453
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These are the numbers my book gives for a 1977 454:
454 - 245 hp @ 3800 rpm - 365 ft.lbs torque @ 2800 rpm 454HD - 240 HP @ 3800 rpm - 370 ft. lbs torque @ 2800 rpm As for the smog equipment, we had a bunch(about 60) 76-79 Chevy and GMC 1 tons with the 454, and only the 79's had smog pumps, although I'm sure California models were different. 60-66 Nut
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60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500 |
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07-26-2005, 11:15 AM
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#3 |
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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There won't be smog on a 77 1Ton.
454 stock was 240hp @3800 and 370lb/ft @2800
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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07-26-2005, 06:43 PM
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#4 |
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7000 #'s of american IRON
Join Date: Dec 2004
Location: north tx
Posts: 883
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cool thanks.
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07-26-2005, 11:03 PM
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#5 |
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7000 #'s of american IRON
Join Date: Dec 2004
Location: north tx
Posts: 883
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just realized that with 30" tires, 4.10's, and a TH400, our truck is dead on the torque peak at 60 MPH.
Is the coincedence or did GM do the math and do that deliberately? |
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