So learn me on big block heads...

[Zeus33rd]

Just looked up the heads on my 454 today-

14092360...86-90...oval...OPEN...454 Truck, "peanut" round ports

So what does all this mean? The oval port, open chamber part I think I understand...But what does "peanut ports" mean? Are these good heads or so-so heads? I realize they aren't performance/hotrod heads, but I'd still like to know what I've got.

 

[ryan22re]

the peanut heads are the red headed stepchild of bbc heads.

i wouldnt intentionally seek them out, but if i had them in good shape id run them. just make sure you have an intake specifically for the peanut heads. most marine engines run them for low rpm torque. peanut ports are smaller even than oval ports, and would be fine for your tow rig.

 

[k20]

Those heads are ok for torque, aint gonna have much power over 4500 though. Heads are divided into Rectangle, Oval, and peanut, peanut are basically just small ovals. Like, really small ovals. They are about half the size of my 049s (ovals) after I did a little porting on my 049s.

 

[tarussell]

The "peanut port" heads are very low RPM range heads.
They came in some T/D motors for truck applications and in C/K/R/V trucks too. They give a BBC a power band similar to a diesel engine . Lots of low end grunt but at the exspense of any kind of power over 3,800 RPM's ( actually these heads fall off a little before 3,800 RPM's ).
These heads are great for towing and motor home applications but not much else . I am not saying that they are a bad design but I am saying that they were meant for a specific RPM range and not much else.

Tom

 

[Zeus33rd]

So, in other words, they suck shiit?

 

[ryoken]

the peanuts are very, very common in the marine industry.. see them quite a bit...

for a low rpm trail rig, they'd be decent i suppose...

 

[4X4HIGH]

peanut port heads are perfect for a low end torque engine, they don't make any HP but torque is what you're after anyways.

 

[Zeus33rd]

peanut port heads are perfect for a low end torque engine, they don't make any HP but torque is what you're after anyways.

I was hoping you'd reply to this thread.


Anyways, the truck is a dd with a 465 trans....No speed shifting goin on, so hp isn't really gonna do me much good.


So, since I have these heads, What should I be lookin at as far as cam specs?

 

[ryan22re]

something small

 

[stevos67k20]

Comp cams makes a retro-fit (or not) hyd roller cam that has 206*/212* duration. The same cam (although not retrofit) is used on sallee chevrolet's extreme4x4 454 engine making over 400 ft/lb at somthing like 1300 rpms. that engine uses a late model block (gen 6 i believe), 4 bolt main. i don know what you have but those numbers look pretty good to me. heres i link i hope it works http://www.sallee-chevrolet.com/frame.html?/ChevyBigBlockV8s/454_xtreme_4x4.html

"this engine has peanut style high torque heads" thats what they wrote(on the site)

 

[thatK30guy]

How much for the Sallee motor?

 

[Zeus33rd]

Comp cams makes a retro-fit (or not) hyd roller cam that has 206*/212* duration. The same cam (although not retrofit) is used on sallee chevrolet's extreme4x4 454 engine making over 400 ft/lb at somthing like 1300 rpms. that engine uses a late model block (gen 6 i believe), 4 bolt main. i don know what you have but those numbers look pretty good to me. heres i link i hope it works http://www.sallee-chevrolet.com/frame.html?/ChevyBigBlockV8s/454_xtreme_4x4.html

"this engine has peanut style high torque heads" thats what they wrote(on the site)

This is what I have as far as a block-

14015445...454.......78-90...2 or 4 bolt

It does happen to be a 4 bolt. It actually started out as the Goodwrench 454. Same as what Sallee started with except mine is Gen 4.

This is the cam kit I'm considering-
http://store.summitracing.com/defau...eywordSearch&DDS=1&N=115&target=egnsearch.asp

The least aggressive of the Extreme 4x4 line.

Part Number 11-231-3
Engine 1965-1996 Chevrolet
396ci-454ci
8cyl.
Grind Number CB X4 254H-11
Description
Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.505 0.505
Duration At 0.006 Tappet Lift 254 262
Valve Timing At 0.006
Open Close
Intake 21 55
Exhaust 66 16
These Specs Are For The Cam Installed At 107 Intake CL
Intake Exhaust
Duration At 0.05 210 218
Lobe Lift 0.297 0.297
Lobe Separation 111

I would think that that cam, along with an Edelbrock 2161 manifold and an Edelbrock Q-jet would make a good torquey motor. Thoughts?

 

[ryan22re]

yep, the high lift/low duration of that cam looks good to me.

may have to check valvesprings and or piston/valve clearance, just to be sure.

 

[1985_K5_Silverado]

How much for the Sallee motor?

$4,850 (search their site for SC454X ).

 

[stevos67k20]

hey thats not bad at all. i never did find a price for that engine.thanks

KidJethro: sounds like your good to go! good luck.