WebDec 13, 2010 · While the '68 350 H.O. used small-valve No. 18 cylinder heads, the '69 350 H.O. is essentially a small Ram Air III and used the same large-valve No. 48 heads and comparative camshaft duration ... WebSep 8, 2016 · The 403 eventually replaced all the larger Pontiac, Buick, and Olds V-8’s and became GM’s defacto ‘big block’, much as the aforementioned Ford 400 had become. Pretty common in B, C, and …
Chevy 350 400 Hp Build Recipes
WebJan 3, 2008 · The results were 556 lb-ft of torque and 496.7 hp. Close, but not quite there. A second 1-inch spacer got us there. This time around, the torque peaked at 565 at 4,300 rpm and the horsepower was ... WebMar 29, 2024 · Preparation: SD Performance 250-cfm CNC-Ported Head package. Combustion Chamber Volume: Verify original chamber volume; pistons should be matched to chamber size to achieve 9.25 to 9.5:1 … shark news today
Pontiac 400 build Hot Rod Forum
WebApr 4, 2024 · The Pontiac 400 is a large-bore, small-stroke engine that was used from 1967 to 1979 in Pontiac vehicles. It has a displacement of 400 cubic inches (6.6 liters). The Pontiac 455 is a larger engine, used from 1970 to 1976, with a displacement of 455 cubic inches (7.5 liters). Both engines use the same type of block, however, the bore and stroke ... WebApr 6, 2024 · Over the 400 V8’s run, it was used in some of the most iconic Pontiac models, and by extension some of the most iconic American muscle cars ever built. This guide will cover the Pontiac 400 V8 engine’s history, specs, common problems, and performance upgrades. Check out our Pontiac 389 Engine Guide for more Poncho V8 content. WebJan 1, 2024 · The Pontiac 400 engine was a fierce competitor in the 1970s. The most powerful version, the Ram Air IV, produced an impressive 370 horsepower, making it one of the most powerful engines available at the time. The engine was featured on the Pontiac GTO, making it a true muscle car. For today, the Pontiac 400 engine has been upgraded to … shark nesting areas near florida