Trailer Killers!

Greg Reimer 7376 · 01-06-2019, 11:11 PM

I guess a few persons wanted to check out the specs on the 409- the original cam in a '62 380 or 409 horse engine ended in part #930, it had .439" lift on both valves.It was a carryover from the small port '61 360 horse 409. A running change was the 3830690 cam, it had .507 intake lift, .519 exhaust lift. NHRA let you use it without any horsepower penalty. The '63 engine used the same cam, but it didn't seem to get a horsepower break, the engine was rated at 400 horsepower or 425 horsepower. The only difference between the '62 hi po 409 and the '63 was the chrome valve covers, air cleaner, and dipstick,and the '63 cast iron exhaust manifolds were a cast iron header that did work better than the 2 1/2" outlet rams horns on the '62 motor, but you wouldn't use either one on a race car. The '62 engine and car is the one to build.The two engines allow the OEM head, the #690 casting, with the #583 head as a legal replacement. The 583 came on the '64 400 and 425 horse engine and the '65 400 horse engine. Only difference was that the valve spring seats were deepened and taller valve springs were used on that head to eliminate coil bind and to enhance spring life. They are more rare than the 690 heads. Have fun rounding up all these parts, and building these engines!! Oh,yes, the dual 4 barrel intakes are the same for all years.

01-06-2019, 11:11 PM	#21
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,136 Likes: 172 Liked 705 Times in 219 Posts	Re: Trailer Killers! I guess a few persons wanted to check out the specs on the 409- the original cam in a '62 380 or 409 horse engine ended in part #930, it had .439" lift on both valves.It was a carryover from the small port '61 360 horse 409. A running change was the 3830690 cam, it had .507 intake lift, .519 exhaust lift. NHRA let you use it without any horsepower penalty. The '63 engine used the same cam, but it didn't seem to get a horsepower break, the engine was rated at 400 horsepower or 425 horsepower. The only difference between the '62 hi po 409 and the '63 was the chrome valve covers, air cleaner, and dipstick,and the '63 cast iron exhaust manifolds were a cast iron header that did work better than the 2 1/2" outlet rams horns on the '62 motor, but you wouldn't use either one on a race car. The '62 engine and car is the one to build.The two engines allow the OEM head, the #690 casting, with the #583 head as a legal replacement. The 583 came on the '64 400 and 425 horse engine and the '65 400 horse engine. Only difference was that the valve spring seats were deepened and taller valve springs were used on that head to eliminate coil bind and to enhance spring life. They are more rare than the 690 heads. Have fun rounding up all these parts, and building these engines!! Oh,yes, the dual 4 barrel intakes are the same for all years.