Author Topic: dyno....  (Read 2192 times)

Offline 1979C20

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dyno....
« on: December 14, 2010, 02:55:25 AM »
I haven't had a chance to take my truck down and have it run on the dyno. So, I was wondering if you guys had a way to predict horse power and torque from specs. 350, standard bored, stock pistons, stock crank ground .010, stock heads, stock valves, Comp Cams 460l, 292d, stock intake, stock rochester q-jet, cooling fan 1inch smaller than stock, headers, no smog, glasspacks, SM465 4spd manual, 4.10 or 4.11 gears, 285xsomethingx16's. If you could tell me how much horsepower/torque to the fly wheel and to the rear wheels, you will get brownie points for whoever is closest when I take it to the dyno.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline 1979C20

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Re: dyno....
« Reply #1 on: December 14, 2010, 02:59:18 AM »
Oh, and it would be stock compression ratio and I am running 87octane pump gas. And it is a 1979 C20, if that matters. After the rebuild, I have been able to wind the motor up healthily to 6k rpms.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline Captkaos

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Re: dyno....
« Reply #2 on: December 14, 2010, 05:09:37 PM »
To the Tire, 200/278

Fat fingered the 3 on there for my guess.
« Last Edit: December 14, 2010, 05:22:38 PM by Captkaos »

Offline 1979C20

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Re: dyno....
« Reply #3 on: December 14, 2010, 05:14:13 PM »
Okay, guess number 1! Anyone else want bragging rights/brownie points for guessing close? I'm hoping to get her on a dyno after christmas, hopefully before but maybe next year.
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline Blue 82

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Re: dyno....
« Reply #4 on: December 14, 2010, 07:25:35 PM »
180hp
240 lb/ft
to the ground
82 stepside 2wd 355/th350/3.08 posi

Offline 1979C20

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Re: dyno....
« Reply #5 on: December 14, 2010, 07:36:38 PM »
Alright. I got 2 guesses towards the rear wheels, what about just the engine?
1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF

Offline mean87

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Re: dyno....
« Reply #6 on: December 15, 2010, 09:11:21 PM »
315hp 370ft-lb at the flywheel 250hp and 300ft-lb of torque at the rear wheel

Offline VileZambonie

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Re: dyno....
« Reply #7 on: December 15, 2010, 09:28:47 PM »
165 / 270
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