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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#44715 11/21/2003 6:20 AM | Joined: Oct 2003 Posts: 62 Member | | Member Joined: Oct 2003 Posts: 62 | I have a 261,rebuilt,bored 30 over,has Clifford alum intake,small 4 barrel,mallory elect ignition. Any guess as to it's horsepower? I got no clue.Thanks,jim | | |
#44716 11/21/2003 8:00 AM | Joined: Feb 2000 Posts: 5,194 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,194 | After dragstrip testing my 250, and weighing the truck, it has in the area of 130 to 140 horsepower at the flywheel and 100 to 110 at the tires. It's a 250, .030" over, 240 cfm carb, mild cam, header, and HEI ignition. Joe | | |
#44717 11/21/2003 10:52 AM | Joined: Oct 2003 Posts: 62 Member | | Member Joined: Oct 2003 Posts: 62 | thanks joe. mine has a mild cam too. | | |
#44718 11/21/2003 11:34 AM | Joined: Sep 2002 Posts: 158 knuckle head | | knuckle head Joined: Sep 2002 Posts: 158 | Ape, you're up early, where are you in Idaho?I lived there for a few years.A 261 like your has 160-180 horsepower at the flywheel, but as Joe found out, it could be less than we all think. | | |
#44719 11/21/2003 4:41 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I'd guess around 160. If you go 60 over, shave the head, port & polish, full race cam and headers you can get up to 200. Above that and you get into lots of money.
Fred
52 3600
69 C-10
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