My Peanut Port BBC 467 Engine Build

[Vortecpro]

My goal was to build a smooth idle 9.3 compression 467 BBC with peanut port heads (236 castings) then put it in my 1968 Chevelle for a drag test, yes a real drag test. Some pictures as the build went along. The center piece of my build, notice the symbol.........that sure isn't a hump there!

[Vortecpro]

Some more pictures of the completed rods, GM 3/8 press fit. The 236 peanut port heads assembled.

[VintageMusclecar]

Any pics of the finished intake ports?

Just curious--have you ever tried working a set of "820" heads? They have a relief cast in the chamber by the exhaust valve similar to yours

(pic snagged from the internet)


http://www.yenko.net/ubbthreads/pics/usergals/2016/02/full-1124-38867-820_bb_chevy_chambers.jpg

[Vortecpro]

Yes, I have used them, Its actually a similiar chamber as a 215 or 063 or 290 with that cut out behind the valve.

[earntaz]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Vortecpro</div><div class="ubbcode-body">Yes, I have used them, Its actually a similiar chamber as a 215 or 063 or 290 with that cut out behind the valve.</div></div>

I've used the 063s -- made good power for a first half-a$$ed open chamber design ... FWIW I am still running these heads with porting similar to Sissel (spell) mods ... TAZ

[COPO_Anders]

This will be interesting. I have a late 80´s motorhome 454 with peanut port heads that I´m going to use in my 1974 Corvette. The engine is like new inside so there is no machining required. I´ll put an aluminum intake on it but haven´t yet decided on which camshaft to use.

Keep it coming !

[earntaz]

I should clear something up -- the 063s are NOT peanut port. Peanut port heads are normally found on truck engines to build goobs of low RPM Torque. 063s have larger oval ports. TAZ

[VintageMusclecar]

Stay tuned Anders, you're gonn'a be amazed at what this engine can do. <<GRAEMLIN_URL>>/naughty.gif

[Vortecpro]

Heres you go Anders.... more pictures, the crank GM 7416

[novadude]

Those look like the '69 '148' chambers.

Does anyone know the chamber size of stock '148' heads? I've seen a lot of conflicting info.

[Vortecpro]

Around 113-114 CC. Some how its seems no one likes my peanut port.........LOL.

[VintageMusclecar]

I like it...but I already know how it runs lol.

Lots of hidden gems in those photos. <<GRAEMLIN_URL>>/biggthumpup.gif

Mark, can you show what's done to the pan &amp; sump on this engine?

[SuperNovaSS]

I'm curious to hear about the results. I've always been curious about the peanut port heads. It seems like many guys have been going to oval ports for the street and peanut ports may even offer more driveabilty?


Thanks for sharing,


Jason

[Zman1969]

4 bolt block and steel crank on peanut port engine now I've seen it all!
But, you have my attn now!
I'm putting parts together for a 454 for my nova and common sense says get some 781 heads but the weight...
wanting aluminum, but also want it to look stock like 375/396 engine <<GRAEMLIN_URL>>/naughty.gif

[COPO_Anders]

Do you have a picture of your &quot;236&quot; heads before the combustion chambers were worked on ? I looked at my &quot;360&quot; heads today and the combustion chamber looked a bit smaller om mine.

<<GRAEMLIN_URL>>/biggthumpup.gif

[novadude]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Vortecpro</div><div class="ubbcode-body">Around 113-114 CC. Some how its seems no one likes my peanut port.........LOL. </div></div>

Thanks. I love what you are doing with peanut ports. Wish they made them with early 100cc chambers, as they seem like they'd be perfect on a 396/402.

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO_Anders</div><div class="ubbcode-body">
Do you have a picture of your &quot;236&quot; heads before the combustion chambers were worked on ? I looked at my &quot;360&quot; heads today and the combustion chamber looked a bit smaller om mine.

<<GRAEMLIN_URL>>/biggthumpup.gif </div></div>

Here you go.

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuperNovaSS</div><div class="ubbcode-body">I'm curious to hear about the results. I've always been curious about the peanut port heads. It seems like many guys have been going to oval ports for the street and peanut ports may even offer more driveabilty?


Thanks for sharing,


Jason
</div></div>

Thanks, drivability is GREAT!

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: VintageMusclecar</div><div class="ubbcode-body">I like it...but I already know how it runs lol.

Lots of hidden gems in those photos. <<GRAEMLIN_URL>>/biggthumpup.gif

Mark, can you show what's done to the pan &amp; sump on this engine? </div></div>

Eric, I took the factory passenger car 4 quart pan and gutted it, I then fitted the factory LS6 windage tray, and that was it. The only thing I need now is one of your carbs, this summer for sure!

[Crossbreed383]

I'm building a stock appearing 427 with some of Mark's ported 781 heads
Cant wait to see the results

On 4.0 stroke and smaller builds, does the windage issue show up early in rpm's , or just 4.25&quot; stuff and up does the issue really manifest itself?

[protree68]

I can't tell you guys how lucky I am to have this engine builder in my back yard . He just finished a stock 396/325 motor for my 69 Convertible I'm restoring it made 406hp and idled at 650 rpm. Everytime he dyno's one of my engines it's like seeing your new born child

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Crossbreed383</div><div class="ubbcode-body">I'm building a stock appearing 427 with some of Mark's ported 781 heads
Cant wait to see the results

On 4.0 stroke and smaller builds, does the windage issue show up early in rpm's , or just 4.25&quot; stuff and up does the issue really manifest itself? </div></div>

I ran this engine to 6700 RPM with no windage issues, but I wouldn't run this pan on a longer stroke engine.

[COPO_Anders]

Thank´s for the pic of the combustion chamber. It looks similar to what I have on my &quot;360&quot; heads. <<GRAEMLIN_URL>>/smile.gif

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO_Anders</div><div class="ubbcode-body">
Thank´s for the pic of the combustion chamber. It looks similar to what I have on my &quot;360&quot; heads. <<GRAEMLIN_URL>>/smile.gif </div></div>

The chamber is the same as a 236 but 360s have stellite exhaust seats.

[novadude]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: protree68</div><div class="ubbcode-body">I can't tell you guys how lucky I am to have this engine builder in my back yard . He just finished a stock 396/325 motor for my 69 Convertible I'm restoring it made 406hp and idled at 650 rpm. Everytime he dyno's one of my engines it's like seeing your new born child </div></div>

&quot;stock&quot; as in stock cam, stock compression, stock manifolds? Impressive!

[EZ Nova]

Mark, no induction detail or cam specs? I know this will work well. Probably run faster then it should for the Hp of the engine too.

[Vortecpro]

[quote=EZ Nova]Mark, no induction detail or cam specs? I know this will work well. Probably run faster then it should for the Hp of the engine too. [/quot

The intake is a Performer RPM. The cam is a hyd 228/.540/111.

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Vortecpro</div><div class="ubbcode-body">[quote=EZ Nova]Mark, no induction detail or cam specs? I know this will work well. Probably run faster then it should for the Hp of the engine too. [/quot

The intake is a Performer RPM. The cam is a hyd 228/.540/111. </div></div>More pictures, looks pretty innocent there.

[EZ Nova]

Mark, that the way I like them to look, innocent and mild. Then the thing runs like the wind. ANYONE can make a aftermarket run, it's these engine with nothing really special in them and run hard that surprises people.

Now if you didn't block the fuel pump drive, let the belt turn the waterpump, and used a &quot;normal&quot; distributor and not a crank trigger. It would be even more innocent.

[Zman1969]

Hopefully you can give us any insight on how to tell a 4 bolt block externally they used to have a 1&quot; plug for oil cooler now as you can see thats not on this block, is there any other way to tell without pulling the pan? the side oil galley plugs used to be 1/4&quot; vs 1/8&quot;? sorry I dont mean to hijack your thread <<GRAEMLIN_URL>>/crazy.gif

[SuperNovaSS]

The external 4 bolt main ID is only a sure thing for 1971 and earlier blocks as far as I know. After that it is hit and miss. I'm excited to see the results of this build. VortecPro is such a tease.


Jason

[Vortecpro]

Later 445 casting block only have a 3/8 pipe plug. All factory 4 bolt 4.250 blocks are un shrouded on the deck for the intake valves.


Ready to race.

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuperNovaSS</div><div class="ubbcode-body">The external 4 bolt main ID is only a sure thing for 1971 and earlier blocks as far as I know. After that it is hit and miss. I'm excited to see the results of this build. VortecPro is such a tease.


Jason </div></div>

Here you go.....

[EZ Nova]

Congrads Mark. Not to shabby for smooth idle, running on probably and gas you can find and the peanut ports. I figure your making &quot;around&quot; LS-6 numbers with less cam, less head, less comp the those miserable running LS-6's. Would seem like a nice stop-light car too.

John

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">Congrads Mark. Not to shabby for smooth idle, running on probably and gas you can find and the peanut ports. I figure your making &quot;around&quot; LS-6 numbers with less cam, less head, less comp the those miserable running LS-6's. Would seem like a nice stop-light car too.

John </div></div>
Thanks, what about this........

[COPO_Anders]

Impressive to say the least !

<<GRAEMLIN_URL>>/3gears.gif

[Zman1969]

http://www.yenko.net/ubbthreads/ubbthreads.php/ubb/download/Number/47610/filename/IMG_2709.JPG
cars gotta lot of pickup,
fix the cigarette lighter (Jake)
well done! - what were the dyno numbers

[EZ Nova]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Vortecpro</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">Congrads Mark. Not to shabby for smooth idle, running on probably and gas you can find and the peanut ports. I figure your making &quot;around&quot; LS-6 numbers with less cam, less head, less comp the those miserable running LS-6's. Would seem like a nice stop-light car too.

John </div></div>
Thanks, what about this........ </div></div>

There ya go. HOLDIN BACK ON US Eh (canadian so I HAD too) MARK! That's better for sure. BUT quite teasing us. You posted pictures on dyno, now a couple of time slips, now what about the &quot;GOOD&quot; dyno sheet.

HELL MAN, I need a goal lol.

John

[EZ Nova]

NOW you need to throw into the mix, those 2 427's you did. I figure this should come in pretty much just a tick under engine #1 due solely on cam, comp ratio and castings????

So how did I do??

[Vortecpro]

Here you go...of course thats on a 2130 foot track with a hesitation on the launch.

[EZ Nova]

Sorry Mark. Was away, long weekend up here in Canada this weekend. So where's the dyno sheet?

[Vortecpro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EZ Nova</div><div class="ubbcode-body">Sorry Mark. Was away, long weekend up here in Canada this weekend. So where's the dyno sheet? </div></div>

https://youtu.be/Vzp_ihehkUY


532 HP @ 27.80 barometer observed. Running weight 3720.

[EZ Nova]

Thanks Mark. Like I said, seems to be running better the the &quot;numbers&quot; say it should. CONGRADS.

I thought it would do a bit more, in the 550 range where as the L72 in you post &quot;Two 427's&quot; made 575 @ 6500.

All good my friend. You seem to do more with, AND FOR less, for those who don't already know.

John

[EZ Nova]

Mark any more on this? Is that a &quot;JTS&quot; carb? Those carbs work pretty good on my friends (BK) SB Ford, mid 7's in the 1/4.