61cc - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

347 · 07-29-2004, 02:22

My 347 has 63cc chamber heads giving me a comp of 10.2.
If I was to change to AFR185'S with a 61cc chamber, what would my comp be?
Would I notice the difference in performance in going to afr's?

EDXR8 · 07-29-2004, 02:28

Quote:

Originally Posted by 347

My 347 has 63cc chamber heads giving me a comp of 10.2.
If I was to change to AFR185'S with a 61cc chamber, what would my comp be?
Would I notice the difference in performance in going to afr's?

About 10.45

Racer · 07-29-2004, 03:28

Go for the 57cc versions. That's what i have got, and my decks are also cut. My comp is 11.1 and runs on pump unleaded with no problems.

07-29-2004, 04:22

Quote:

Originally Posted by Racer

Go for the 57cc versions. That's what i have got, and my decks are also cut. My comp is 11.1 and runs on pump unleaded with no problems.

Premium 95 or 98?

347 · 07-29-2004, 04:45

Racer and blue66....did you guys use the springs that came with heads?

ebxr8240 · 07-29-2004, 07:57

http://www.rosspistons.com/calculator.php

Racer · 07-29-2004, 16:40

Quote:

Originally Posted by 347

Racer and blue66....did you guys use the springs that came with heads?

I changed mine. I used springs that matched my cam, but incidently, they were very similar to the ones i took out.

Anyone want a set?

347 · 07-29-2004, 17:32

What valves are you using?

ebxr8240 · 07-30-2004, 06:47

They usually come with Ferera valves...
Here's some info on page 18..Works out compression with size dish piston etc in their kit's...http://www.eaglerod.com/2003Catalog.pdf

347 · 07-30-2004, 17:50

Are they any good?