Can I make good power using BBC peanut port heads?? - Chevy Nova Forum
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Old 10th-February-2009, 01:19 AM   #1
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Can I make good power using BBC peanut port heads??

I am building a 454 for my Chevelle and I'm on a budget. I was given a pair of peanut port heads for free that have been rebuilt. can I still get 450+ HP with these heads? what kind of mild porting can I do besides a port gasket match? what kind of cam should I run?
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Old 10th-February-2009, 02:44 AM   #2
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you can make some power, don't expect alot. The peanut port heads were intended for trucks. Low RPM torque. There's alot of work to do to them to make them perform. I would hold out for some 049 oval ports before I'd spend money on the peanut ports.
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Old 10th-February-2009, 02:57 AM   #3
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I am in the same boat with my 454, I did read a article in Chevy High Performance last year that with some work that the peanut could support around 500. I don't know what all they did, it was one of the issues where they compare heads with one another. I am thinking about opening mine up with the grinder a little and just see what happens!!

David
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Old 10th-February-2009, 03:01 AM   #4
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I am in the same boat with my 454, I did read a article in Chevy High Performance last year that with some work that the peanut could support around 500. I don't know what all they did, it was one of the issues where they compare heads with one another. I am thinking about opening mine up with the grinder a little and just see what happens!!

David
I think I might do the same. at least a clean gasket match on the intake side.
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Old 10th-February-2009, 03:05 AM   #5
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this motor will be in my Chevelle with stock exhaust manifolds and I will be running a tremec 5 speed later on. on edelbrock's site it says that a 454 with small oval port heads and a performer intake and cam will make 470 ft, lbs of torque @ 3500 rpm. It doesn't mention the HP.
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Old 10th-February-2009, 03:14 AM   #6
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in that case just be careful if you're gonna clean up the exhaust port you don't mess up the valve job. Plus whatever cam you buy you have to have the springs set up for it. I'd probably go with an isky hydraulic 286 cam
510"lift 224@.050 on a 108LSA.
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Old 10th-February-2009, 03:15 AM   #7
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Here is some good reading on the peanut port heads. I think 450 HP could be achieved with those heads. Depending on cam they would be done around 5500-5800 rpm. Good luck
http://www.chevelles.com/forums/show...nut+port+heads
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Old 10th-February-2009, 09:37 AM   #8
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Quote:
Originally Posted by novaBRO View Post
this motor will be in my Chevelle with stock exhaust manifolds and I will be running a tremec 5 speed later on. on edelbrock's site it says that a 454 with small oval port heads and a performer intake and cam will make 470 ft, lbs of torque @ 3500 rpm. It doesn't mention the HP.
based on this statement..... use them.... the small port heads will build a ton of low end.. which is what you want in a street car.... plus it will have high velocity.. so low end driving with a larger that norm cam will respond better.....


based on just what you have listed... I would say that are perfect for your criteria....
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Old 10th-February-2009, 12:17 PM   #9
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this is the specs on the performer RPM cam is this too big for my heads?
Duration at 0.006" Lift: Intake: 300 Exhaust: 306
Duration at 0.050" Lift: Intake: 240 Exhaust: 246
Lift at Cam: Intake: 0.330" Exhaust: 0.337"
Lift at Valve: Intake: 0.560" Exhaust: 0.573"
Timing at 0.050" lift: Open Close
Intake: 10 BTDC 50 ABDC
Exhaust: 59 BBDC 9 ATDC
Centerlines: Lobe Separation - 112 Intake Centerline - 110
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Old 10th-February-2009, 11:04 PM   #10
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That cam would be just fine. In a 454 it should make monster torque. As for the heads, I'd just do a good valve job and enlarge them to the 2.19/1.88 valves and do the bowl blend. I wouldn't worry about trying to open up the portsd to match the intake, but maybe radius the port entry to eliminate the sharp edge in the mismatch between the intake and head. Other than that, just set up the right springs and make sure the decks are true. On a BBC, don't skimp on the rocker arm studs. Throw the stockers in the trash and get some ARP's. Broken studs suk. With a performer RPM intake, it should really put you back in your seat at low rpm's.

Are the stock manifolds for looks or budget? If it's for budget, I'd really look into a set of headers. Stock BBC heads are not really good on the exhaust side and headers really help free them up. Headman sells 1 3/4 headers that are ceramic coated for around $350.00, and just plain painted for around $150-$160. They would make a real difference.

What are you planning for a carb? A 750 vacuum secondary Holley would be good, or a properly reworked Q-jet would be excellent. I'd recommend staying away from the Edelbrock carb, and the Holley and Q-jet will more than likely make more power than an Edelbrock.
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Old 11th-February-2009, 12:15 AM   #11
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my plans are for bone stock look. I am building a LS5 SS clone



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Old 11th-February-2009, 12:26 AM   #12
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That is quiet impressive on the link previuosly posted, a little over 600 hp on peanut port heads. WOW!!!!
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Old 15th-February-2009, 12:38 AM   #13
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doing the same, i was basically given the motor, dad buying the parts and im picking them, lol, cant beat a free motor till you get the one built you want, anyway, 454 bored .30, srp forged pistons, forged h beam rods, steal crank, have a victor jr. intake to run, but still open minded about it, putting a 780 holley on it, hooker 2 inch headers, solid lift cam from comp cam, .561/.561, expecting to see some real nice street torque(hopefully 550-575) and around the 490-495 horsepower, but never know till she together. actaully will be done next week. too bad the rest of the car wont be.....but in about a month i expect to see burn outs from her , anyway, i have the g-tech, if your not planning on running it for a month, i can let you know what she does 1/4 times. i currently will be running the chevy 990 castings. the bone stock. i agree with the others. i will save my money on porting stock heads, to buying a nice set of heads with the flow where i want them to be. so, in a long drawn out point, save your money, dont port the peanuts, and buy a nice set of aluminum heads when the cash flow is there.
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Old 15th-February-2009, 01:11 AM   #14
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Yea, but there's a HUGE difference between your 990's and a set of peanut ports. Yours already have the big valves and flow pretty good. And if you want some good street torque, get rid of that Victor JR and get a Performer RPM. I'm even willing to bet your engine would run faster in the 1/4 with teh RPM than with the Victor JR. You're not running much cam or carb, so you don't need a high flowing intake at 7000rpm.
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Old 15th-February-2009, 08:55 AM   #15
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After reading this I have the feeling my cam is small
Im running 049's with big valves and a 238/248 cam. I have the feeling that in a few weeks when I get her running I will be changing that cam
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