It's finally time - a new engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cliffsta · 11-14-2006, 05:51 PM

High Output 350. Makes 330 horses and 380 Ft/Lb TQ. Basically, Vortec heads, upp'ed C.R., little tweaks like that. The standard crate 350 makes 260 horses and around 330-350 Ft/Lb TQ.

Stock 305 (in 1980) made 135 HP and 235 TQ (I got one, I know) which isn't very stellar. Simply putting in a standard 350 would waaay up your power. Fuel mileage, depends on the carburetor. My truck came with a POS 2-barrel carburetor. With a 4 Barrel one can baby the throttle and adjust the vaccum on the secondaries to not open up the big "barrels" and thus get better MPG than a 2 barrel with just 2 medium-sized barrels. It is possible that a new, fresh motor with a good 4-barrel will get comparable MPG as your tired 305 with (assumedly) a 2 barrel.

Ok, sorry for being so long-winded, I hope that helps some.

11-14-2006, 05:51 PM	#11
cliffsta Stepsides RULE Join Date: Jul 2004 Location: Pineville, LA Posts: 1,921	Re: It's finally time - a new engine High Output 350. Makes 330 horses and 380 Ft/Lb TQ. Basically, Vortec heads, upp'ed C.R., little tweaks like that. The standard crate 350 makes 260 horses and around 330-350 Ft/Lb TQ. Stock 305 (in 1980) made 135 HP and 235 TQ (I got one, I know) which isn't very stellar. Simply putting in a standard 350 would waaay up your power. Fuel mileage, depends on the carburetor. My truck came with a POS 2-barrel carburetor. With a 4 Barrel one can baby the throttle and adjust the vaccum on the secondaries to not open up the big "barrels" and thus get better MPG than a 2 barrel with just 2 medium-sized barrels. It is possible that a new, fresh motor with a good 4-barrel will get comparable MPG as your tired 305 with (assumedly) a 2 barrel. Ok, sorry for being so long-winded, I hope that helps some. __________________ 1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord

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