krcaddis
Junior Member
- Joined
- Sep 7, 2013
- Posts
- 21
- Reaction score
- 0
- Location
- Santa Margarita
- First Name
- Gene
- Truck Year
- 1985
- Truck Model
- C20
- Engine Size
- 350
I'm just installing a low mileage crate engine to replace my grossly overheated original 350 /turbo 350 trans '85 2WD C-20 Scottsdale.
The specs on the factory (14010207) is 165 HP @3800 rpm, 275 FT LB @1800 rpm
The crate as spec'd (1066036) is 249 HP @ 4300 rpm and 275 FT LB @ 3600 rpm
They share the same comp. ratio, so the difference is likely due to the cam. Gas mileage was a poor 10 mpg, although better when I bought the truck I had the Holley 4BBL rebuilt by a specialist, which was overdue. It has a 4.10 14 bolt diff. All the other parts were switched over or replaced in kind. It's a ranch truck used or hauling larger loads- I now use a Taco' for running around as we're 20 miles from town.
Will my MPG likely improve with higher HP engine? Will I seriously miss the low end torque? Or will they perform about the same?
The specs on the factory (14010207) is 165 HP @3800 rpm, 275 FT LB @1800 rpm
The crate as spec'd (1066036) is 249 HP @ 4300 rpm and 275 FT LB @ 3600 rpm
They share the same comp. ratio, so the difference is likely due to the cam. Gas mileage was a poor 10 mpg, although better when I bought the truck I had the Holley 4BBL rebuilt by a specialist, which was overdue. It has a 4.10 14 bolt diff. All the other parts were switched over or replaced in kind. It's a ranch truck used or hauling larger loads- I now use a Taco' for running around as we're 20 miles from town.
Will my MPG likely improve with higher HP engine? Will I seriously miss the low end torque? Or will they perform about the same?