Thread: Anyone used "Peanut Ports" on your BBC?

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Originally Posted by pat mccarthy

hey i keep the in stock let the good times roll 4.560 bore in stock

Pat do you think the sleeves might over-lap each other a little bit.

Originally Posted by erik erikson

Pat do you think the sleeves might over-lap each other a little bit.

no i will off set the bores to the out side of the block that is what they make wrist pins for

I have been sitting back and just reading on this post, it interests me as i have 74 oval port 454 4 bolt that is in need of a build.
Thinking of going to a 496 crank and keeping rpm to a limit of 5500 for durability with a hyd cam and stock heads a bit higher comp etc very simple. Something that has a torque line as flat as a table.
An engine that would almost be at home in any vehicle and would perform adequatly in anything because of the torque output.
I dont know much about the peanut heads but-
65 canye has a pretty heavy car and a gearsetup that would be more at home with the lower rpms than a screamer it may work just fine, but not 1st on raceday. Put them in if you want set it up let us know how it turns out.
Id shure like to know.

Originally Posted by canadianal

...I dont know much about the peanut heads but-
65 canye has a pretty heavy car and a gearsetup that would be more at home with the lower rpms than a screamer it may work just fine, but not 1st on raceday. Put them in if you want set it up let us know how it turns out.
Id shure like to know.

Well, For those that are curious, the motor is in and running. Due to a series of unforseen events, I am currently using the peanut ports with stock valves, no port work. The combo is as follows:

65 Biscayne, 4000# (?)
454cid, 9.35:1cr (approx)
770cfm Holley SA, vac sec
Weiand DP intake (rect port )
GM 14092360 Heads "peanut ports"
Voodoo 60201 Hydr FT (256/262, 213/219@.050, .515/.530, 112LSA, 108 ICL)
Headers, 2.25" dual exhaust through 40 series FM's
TH400, stock converter, 3.36 gears in the rear diff.

How does it perform? Depends on who you ask. In my experience, it has very good street manners, starts fine, idles fine at about 700 or so, only a slight lope. This combo provides an exessive amount of torque just off idle and pulls very hard (IMO) up to about 5000 (highest I have revved it) although it gets a little soft starting around 4000. It will burn the tires for quite a distance if I ask it to.

Let me add, I AM NOT A DRAG RACER AND HAVE NEVER DRIVEN A SUB-ELEVEN SECOND CAR THAT "HOOKS"........SOOO, to some people, this car could very well be A DOG (or "turtle"...some dogs can RUN) and thus not very impressive. For saturday nice cruises and tire smoking to impress the chics, it does just fine.

The "dreaded" peanut ports are performing better than expected. To compare theory to reality, I can feel the choking effects start to come on around 4000 like I said (and like others have told me) BUT it is not nearly as bad as some would lead you to believe. Could be the exhaust?Again, JMO. Depends what you are comparing against. For such a heavy car, it moves very well. City mileage, with my foot in/out of the throttle, netted around 8.5mpg. Highway MPG I would guess somewhere around 11 (?). I havent driven enough highway miles to know for sure.

Thanks to all who helped me get here. If anyone has any questions or comments about this motor, feel free to PM me or reply to this thread.

"For saturday nice cruises and tire smoking to impress the chics, it does just fine."

Meet any chics yet?

Originally Posted by 65ny

"For saturday nice cruises and tire smoking to impress the chics, it does just fine."

Meet any chics yet?

when the smoke clears, they are normally all gone....

Pat, you left nothing out. I personally always look for your replies. Thanks for hangin in there.

Okay folks, I have been contemplating what 30-A Rider said and feel like I owe you all an apology. I re-read my posts and, it is possible that I may have come off sarchastically even though I tried very hard to write in such a way that one would not get that impression. I certainly did not mean it in a "mean" way. Also possible that I interpreted Erik's reply-post in the same fashion and shot off a response without thinking. Erik, my tone in real life is not near as severe as how it may have come across in words on a screen. Take that for what it's worth.

So, sorry for all that mess. I am not a mean guy. Stubborn maybe, but not mean.

For those interested, I will let you know how it turns out with the small ovals. I found a group of folks running them on the street with some success (like Blackroc) and little on the investment side so I may try it for a while and save some $$. A running BBC is better than no BBC at all.


There, now I feel better.

I should add the sbc I had in my car prior to this 454 ran 11.8xx so I definately noticed a drastic change. Althought the 454 with the peanut ports isn't too bad till it runs out of air.

This was what happened to the last sbc and then I decided to try a bbc for a change.

Originally Posted by 65ny

Pat, you left nothing out. I personally always look for your replies. Thanks for hangin in there.

Agreed. Pat's reply said pretty much everything I beleive.

Just wanted to add my $.02. I run a 454 with 236 peanut ports in my 26' boat. I too run out of air around 4500 rpms, and want to go to around 5500 rpms.

I plan on switching to some 049 or 781 heads soon and running her until she needs a rebuild then I will make her a 496 with forged internals and then may really rev her. Oh, if I didn't run in salt water with raw water cooling (cooling water comes from body of water you are in) system, I would change to aluminum heads to save weight. I thought about putting a closed loop cooling system in, but will just stay with cast iron heads for simplicity.

Unfortunately, I don't want to loose low end grunt, which is why I want to keep the same pitch prop but just rev higher.

well the only thing that i will add is your engine is a very good running engine in your boat the 330 hp are not to bad when they are using small port heads with stock size valves and small cam and all cast iron heads intake crank .. parts.and cast pistons . if you pull a part one there is no trick parts that i think speak volumes on just how good the 454 big block is in stock form .i think they build them to keep them down around 4600. that keeps them happy and well live long

Well, 330 hp pushing a 26' Celebrity Andretti just doesn't satisfy the speed freak in me LOL. I'm hoping with different heads and cam to at least get around 400 hp out of her w/o tearing into the motor. I have higher flow exhaust manifolds on her, and edelbrock intake and holley carb, electronic fuel pump etc. This winter coming up I'll pull the motor apart and see what the insides look like. I would like to eventually end up with an all forged 496 making serious horsepower! Or, maybe I'll just swap in a 502 and start from there, but that would be for another thread LOL