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#2 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: BBC 454 setups
No input on the EFI, but I have two different 427's. An original L36 390hp from a 69 Corvette .030 over with the L2300 forged pistons that has the smallest Comp Cams hydraulic roller nitrous cam. 224/236 @ .050 113 LSA with 10:1 compression. I plan to install this with a TH200 4R and a set of 3.73 gears in my '69 short step.
The other is a cobbled together 427 with a '76 454 block, GM steel crank, and a set of mildly worked 781 heads that was in a boat. .060 over and L2300 forged pistons. It has a Comp marine hydraulic roller 230/236 @ .050 112 LSA with 8.75:1 compression. This ran 10 mph faster than a 330 hp 7.4l Mercruiser in a 26' boat so realistically 450ish hp. It's going in my Corvette with a McLeod street 5 speed behind it and 3.70 gears. Both of these cams were chose with the intent of having good street manners. When I bought the nitrous cam the marine cam was my other choice. I stumbled into the second motor which already had the marine cam in it, so I at some point can compare directly. Both cams should be FI friendly. I have run the former boat motor on my test stand. It sounds wicked and idles quite well at 700 rpm without a transmission attached to it. Should be a hoot in the 3000# 'vette. Now if I can just get my teenagers '72 Jimmy project wrapped up...
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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454 c10, bbc, cam upgrade, efi, roller cam |
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