Ball park compression ratio figure

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Ball park compression ratio figure

Post  bbf-falcon on May 20th 2012, 12:29 pm

A friend of mine and I were discussing what the c/r would be w/4.600 bore,flat top A460 pistons w/in/ex eyebrows,and a 88cc A460 head? Would it be 14.1 or bigger w/that bore?

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Re: Ball park compression ratio figure

Post  res0rli9 on May 20th 2012, 12:33 pm

Whats the stroke?

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Re: Ball park compression ratio figure

Post  dfree383 on May 20th 2012, 12:40 pm

It be about 12.8:1 with a 4.5 stroke and about 12.25:1 with a 4.3.
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Re: Ball park compression ratio figure

Post  Paul Kane on May 20th 2012, 12:42 pm

Even with a 4.5 stroke and a build that is plenty optimized for NA, you'd still no more than 12.75:1

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Re: Ball park compression ratio figure

Post  Deviant on May 20th 2012, 4:27 pm

Free compression calculator @ diamondracing.net/tools/

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Re: Ball park compression ratio figure

Post  bbf-falcon on May 20th 2012, 11:02 pm

res0rli9 wrote:Whats the stroke?

4.5 stroke and a 6.8 rod. How much would you have to cut the head to get to 14.1

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Re: Ball park compression ratio figure

Post  dfree383 on May 20th 2012, 11:04 pm

About a positive 12 cc +/-
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Re: Ball park compression ratio figure

Post  cool40 on May 20th 2012, 11:07 pm

bbf-falcon wrote:
res0rli9 wrote:Whats the stroke?

4.5 stroke and a 6.8 rod. How much would you have to cut the head to get to 14.1
.060
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Re: Ball park compression ratio figure

Post  res0rli9 on May 20th 2012, 11:11 pm

bbf-falcon wrote:
res0rli9 wrote:Whats the stroke?

4.5 stroke and a 6.8 rod. How much would you have to cut the head to get to 14.1
Heads need to be about 77-78cc....You can do it your self here.
http://www.diamondracing.net/tools/

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Re: Ball park compression ratio figure

Post  Deviant on May 21st 2012, 2:39 am

Deviant wrote:Free compression calculator @ diamondracing.net/tools/

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I said that 5 posts ago

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Re: Ball park compression ratio figure

Post  rmcomprandy on May 21st 2012, 11:38 am

Deviant wrote:
Deviant wrote:Free compression calculator @ diamondracing.net/tools/

Give a man a fish, feed him for a day.
Teach a man to fish, feed him for life !

I said that 5 posts ago

Good for you ... LOL.

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