AFR 205s Chamber Size

js66coupe · Jan 11, 2011

I really appreaciate all the responses to my questions as my restoration/engine build proceeds. I'm now at the point where I need to purchase the rotating assy and heads. I'm looking to do a 408W stroker w/ AFR 205 heads. I'm wondering what chamber size I should go with, the 58cc or the 72cc heads. It appears that with the varied dish size in pistons, I can get about the same CR (10.5:1) with either head. I'm thinking the 58cc head. Any reason to go with the 72cc head given the CR will be nearly identical using flat tops as opposed to dished pistons with the 58cc head?
Thanks once again for the help.

dennis112 · Jan 11, 2011

I know of 1 study that determined that a dished piston would give more HP than a flat top.

Irregardless, I would spring for the 58cc versions. If you should decide to sell them, there is a larger market base for the 58cc ones.

PoppyMod · Jan 13, 2011

+1 with respect to what Dennis mentioned about the "dishes" amd making more power. You should research this thought. There is a lot out there, some hype, some real.
As it sounds like your project is going to be more of a drag car, you might want to focus on components making power in the upper half of the food chain. Starting with the heads then cam and valve train.

brianj5600 · Jan 14, 2011

I would like to see those studies.

dennis112 · Jan 14, 2011

brianj5600 said:
I would like to see those studies.

PM sent

PoppyMod · Jan 14, 2011

dennis112 said:
PM sent

Dennis send what you have to me, as well. I'd like to see what version you have.
Thanks!

dennis112 · Jan 14, 2011

PM sent.

j69302 · Jan 14, 2011

Can you just post it here? whats so private about the dish piston study?

dennis112 · Jan 15, 2011

j69302 said:
Can you just post it here? whats so private about the dish piston study?

It is not private. Stangnet blocks the other site (tiff between both sites) and so it can't be posted here. I am simply compling with the desires of both sites.

It is a long thread in another forum and so you have to muddle through it. It has been a long time since I read it, but the conclusion was that dished pistons gave more HP.

PM sent to you.

BuckeyeDemon · Jan 15, 2011

is there a rule posted somewhere that you can't link to another forum with information?

dennis112 · Jan 15, 2011

Maybe or maybe not, but they have software that does it. For example, here is the link (and I didn't add the ******* in front of the com-the stangnet software did):

http://*******.com/index.php/topic,3439.0.html

BuckeyeDemon · Jan 16, 2011

dennis112 said:
Maybe or maybe not, but they have software that does it. For example, here is the link (and I didn't add the ******* in front of the com-the stangnet software did):

http://*******.com/index.php/topic,3439.0.html

cool. this site must be pretty pathetic. not having the ability to share information found on another site is pretty sad. I could understand if it was bashing or promoting another site, but information? maybe a moderator will clue me in.

there should be a rule on forums that you have to site your source, just to prevent some of the BS.

i wonder if they will filter this response?

PoppyMod · Jan 16, 2011

BuckeyeDemon said:
cool. this site must be pretty pathetic. not having the ability to share information found on another site is pretty sad. I could understand if it was bashing or promoting another site, but information? maybe a moderator will clue me in.

there should be a rule on forums that you have to site your source, just to prevent some of the BS.

i wonder if they will filter this response?

HI
You might try spelling out the site name and leave the ".com" off. I expect most of us already know them anyway. Perhaps "Small block fords" etc., for example.

AFR 205s Chamber Size

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