BOSS 302 Rod Length Question

[Damn Yankee]

Jim Kuntz knows the 1968 302 SS/GT combo very well. He and SE Buchannon hurt some feelings in a bad way to include current Pro Stocker Greg Stanfield

[Hans Olsson]

Originally Posted by FireSail

OOPs 3369 for the convertible. Thought it was the heaviest 302. It's the heaviest gas engine offering of that model and year.

That puts the 302/260 Cougar engine at the bottom of GT/J close enough to move to GT/KA.

I think bracket racing what I have with a Holly 600 that would be legal on the 260 hp Cougar for this season and switching the pistons to flat tops over the Winter for GT next year is the best way to go. Carb specs for the 260 Cougar are 1563 1563 1250 1313 the Holly 80540-1 is a 600cfm carb with a throttle bore of 1563 and a venturi of 1229.

EDIT: The 68 Cougar 302 is 230 HP, but does have the Holley carb.That puts it at GT/MA with the heavy body weight of the convertible. The actual car, 68 coupe 302 is 2874. That's 495 lbs lighter than it's classification factor. Is that right? This is favorable, yes?

Dale

A car with 230 Hp in GT/MA (14 lbs per hp) has a minimum weight of 3390 lbs.
14 x 230 = 3220 + 170 lbs for driver.

[Mark Ugrich]

Just a thought ,but even if you did run the inline head,wouldn't you still have to use the "stock" domed piston for the boss motor? Even if you cut reliefs for the valves in a different location,I can't imagine it would make for a very efficient combustion chamber.

[FireSale]

Originally Posted by Mark Ugrich

Just a thought ,but even if you did run the inline head,wouldn't you still have to use the "stock" domed piston for the boss motor? Even if you cut reliefs for the valves in a different location,I can't imagine it would make for a very efficient combustion chamber.

Stock style domes with valve reliefs, yes. A dome designed for the true BOSS head wouldn't be very efficient in an inline aftermarket head like the AFR 1399 but a dome with reliefs designed for the AFR would. You have to watch the math and keep it to a max CR of 10.5:1, 10.1 cc dome and a .047 gasket, though.

You can build a better combo without being the BOSS.

Dale

[FireSale]

Originally Posted by Hans Olsson

A car with 230 Hp in GT/MA (14 lbs per hp) has a minimum weight of 3390 lbs.
14 x 230 = 3220 + 170 lbs for driver.

"Class is determined without driver weight"

Someone needs to run a thread that breaks the GT classification math down into steps. It's hard to read.

Dale