mixing early/late BBC parts

Alan Roehrich · 04-23-2009, 05:33 PM

Ken, the hot setup is the old closed chamber oval port heads, or the Vortec heads. About 96 to 100cc chamber, and 2.19 intake valves with 1.88 exhaust valves. If you can get 10:1 compression it will work fine. My old 454 had about 9.5:1 and it really wasn't enough, even though I went down in cam to a 218/.520. An all steel flat bed truck, with steel wheels and no overdrive it would get 12-14 loaded or not, and pull 20K pounds with ease. With the air on. Of course, with Camaro headers, 3" pipes, and huge mufflers, it sounded a lot like a stock car on the Interstate. I think with 10:1 compression, overdrive, and fuel injection I could do better.

04-23-2009, 05:33 PM	#7
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,115 Likes: 1,572 Liked 1,828 Times in 414 Posts	Re: mixing early/late BBC parts Ken, the hot setup is the old closed chamber oval port heads, or the Vortec heads. About 96 to 100cc chamber, and 2.19 intake valves with 1.88 exhaust valves. If you can get 10:1 compression it will work fine. My old 454 had about 9.5:1 and it really wasn't enough, even though I went down in cam to a 218/.520. An all steel flat bed truck, with steel wheels and no overdrive it would get 12-14 loaded or not, and pull 20K pounds with ease. With the air on. Of course, with Camaro headers, 3" pipes, and huge mufflers, it sounded a lot like a stock car on the Interstate. I think with 10:1 compression, overdrive, and fuel injection I could do better. __________________ Alan Roehrich 212A G/S