BBC 427 Build - Chevelle Tech

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post #1 of 18 (permalink) Old Feb 17th, 11, 9:23 PM Thread Starter
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Chris
 
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BBC 427 Build

I'm Currently Rebuilding my Big Block Chevy 427, it will just be a street motor nothing to radical, The Engine will be bored .60 over & will be going with:

-Keith Black Forged Pistons Dome Height 0.124 in
-Scat H Bean rods with ARP bolts
-110 CC Edelbrock Performer RPM Oval Port Aluminum Heads
-Edelbrock Performer RPM Air Gap Oval Port intake
-Edelbrock Thunder Series AVS 800CFM Carburetors
-Lunati Hydraulic Roller Camshafts & Lifters (Lift .600/.600 Duration at @.50 231 int./239 exh)
-1.7 Ratio Scorpion Race Series Roller Rocker Arms
-Summit Blueprint HEI distrubtor


I figure my compression will be around 9:1

What are your thoughts of this combination?

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 4 link 3.54 Posi

Last edited by 1967 chevelle; Feb 17th, 11 at 10:04 PM.
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post #2 of 18 (permalink) Old Feb 17th, 11, 10:20 PM
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Re: BBC 427 Build

What cam did you previously have in it?
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post #3 of 18 (permalink) Old Feb 17th, 11, 10:29 PM
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Brad
 
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Re: BBC 427 Build

Bump the compression up to 10 to 1, or maybe a little more.
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post #4 of 18 (permalink) Old Feb 17th, 11, 10:54 PM Thread Starter
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Chris
 
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Re: BBC 427 Build

Quote:
Originally Posted by 64play View Post
What cam did you previously have in it?
It was an Elgin Flat tappet, i think the specs were (lift .535 / .535 Duration @.50 220/ 235

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 4 link 3.54 Posi
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post #5 of 18 (permalink) Old Feb 17th, 11, 11:01 PM Thread Starter
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Chris
 
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Re: BBC 427 Build

Quote:
Originally Posted by Twins Fan View Post
Bump the compression up to 10 to 1, or maybe a little more.
The problem is I’m selected on the choice of pistons because I’m using floating rods and since I got the 110 CC heads any other pistons Keith Black offers will give me compression in the 11’s range, So Keith black recommend for me to use the Forged Pistons (Dome Height 0.124), I know the compression is kind of low but this engine will be just for the street I’m not looking to make crazy amount of horse power

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 4 link 3.54 Posi

Last edited by 1967 chevelle; Feb 17th, 11 at 11:33 PM.
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post #6 of 18 (permalink) Old Feb 17th, 11, 11:18 PM
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Re: BBC 427 Build

It's great for a street car, you'll be able to tune the carb and distributor for good performance and good gas mileage.

But not with that carb. Sell that thing and buy a Holley 770 SA.

Tom
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post #7 of 18 (permalink) Old Feb 18th, 11, 12:48 AM
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Re: BBC 427 Build

Couldn't he mill those heads down to 100cc chambers....???
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post #8 of 18 (permalink) Old Feb 18th, 11, 2:32 AM
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Daniel
 
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Re: BBC 427 Build

Well, I'm running 215 heads with big valves vs your edelbrock rpm's, and different pistons, but I have 10:1, and other than that the exact same combo! 427 .060 over, same cam, same intake, but I have a 750 Holley that I've setup.

I will let you know how I like it when I fire it up next week! Got almost everything together, but had a soccer game and it was raining. No rain next week and its getting started up on thursday!

1970 Chevelle - Best time at the WCCG 12.749 @ 108.606, 2.011 60' on street tires!

427 BBC, 215 heads, 2.19/1.88 valves with some port work, 60212 Lunati Hyd Roller, 3310 Holley 750, Performer RPM intake, TH350 with shift kit, 3.55 gears 12 bolt posi, Pypes 3 inch kit, it's alive... again!!!
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post #9 of 18 (permalink) Old Feb 18th, 11, 7:02 AM
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Gene
 
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Re: BBC 427 Build

Well then you;re stuck with 9 to 1. the good news is, it'll make more power on lower grades of gasoline!

Gene
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post #10 of 18 (permalink) Old Feb 18th, 11, 10:54 AM Thread Starter
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Chris
 
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Re: BBC 427 Build

Quote:
Originally Posted by 427L88 View Post
Well then you;re stuck with 9 to 1. the good news is, it'll make more power on lower grades of gasoline!
i should be able to run her on 89 Octane right?

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 4 link 3.54 Posi
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post #11 of 18 (permalink) Old Feb 18th, 11, 10:59 AM
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Sergio
 
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Re: BBC 427 Build

My 511hp MJ467 motor is 9:1 and is awesome! MJ said to use 91 octane fwiw. Good luck with your 427. What's a 427 .060 over anyways?

Sergio
1969 SS396
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post #12 of 18 (permalink) Old Feb 18th, 11, 3:27 PM Thread Starter
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Chris
 
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Re: BBC 427 Build

Quote:
Originally Posted by Stikman33 View Post
Well, I'm running 215 heads with big valves vs your edelbrock rpm's, and different pistons, but I have 10:1, and other than that the exact same combo! 427 .060 over, same cam, same intake, but I have a 750 Holley that I've setup.

I will let you know how I like it when I fire it up next week! Got almost everything together, but had a soccer game and it was raining. No rain next week and its getting started up on thursday!

please post of video once you get her fired up

1967 Chevelle Oshawa Built Car
-427 .60 over, Lunati 60211 Roller cam
-Super T10 2.64
-Dana 60 4 link 3.54 Posi
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post #13 of 18 (permalink) Old Feb 18th, 11, 5:50 PM
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Dan
 
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Re: BBC 427 Build

Quote:
Originally Posted by Tom Mobley View Post
It's great for a street car, you'll be able to tune the carb and distributor for good performance and good gas mileage.

But not with that carb. Sell that thing and buy a Holley 770 SA.
I couldn't agree more with this statemnet.
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post #14 of 18 (permalink) Old Feb 18th, 11, 5:58 PM
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Bill
 
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Re: BBC 427 Build

Those heads would prefer a cam with a wider split to compensate for the intake/ exhaust flow ratio but not a bad choice over all, except the carb .agree Holley SA 770

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post #15 of 18 (permalink) Old Feb 18th, 11, 9:40 PM
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Re: BBC 427 Build

Quote:
Originally Posted by 1967 chevelle View Post
i should be able to run her on 89 Octane right?
9:1 compression and aluminum heads? I'd think 87 would be no problem.

Disclaimer: I can't spell.
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