Re: A460 cylinder head question

cool40 on August 29th 2011, 9:35 pm

with a big shot of "hose"who needs a big ugly dome? afro

Lem Evans on August 29th 2011, 9:42 pm

I do not see much flow while the valves are in that BIG plunge cut.
Blake...I am not picking on the pistons design......just what a guy has to do to get big compression.

138 on August 29th 2011, 9:53 pm

how much comp?...

cool40 on August 29th 2011, 9:55 pm

138 wrote:how much comp?...

all i can get. Very Happy

rmcomprandy on August 30th 2011, 8:58 am

IDT-572 wrote:
Lem Evans wrote:I just wonder how ugly a dome would be that would service a 100 cc chamber...and give large comp. ratio?

About 19cc less ugly than a 119 cc chambered BBC dome would look like................

The STOCK PRODUCTION dome on an L88 Chevrolet piston is 48 cc's.
The intake valve and hindered airflow are only in that piston dome pocket from about 10 degrees BTDC to about 20 degrees ATDC; all below .250" of opening valve lift.

cool40 on August 30th 2011, 8:48 pm

rmcomprandy wrote:
IDT-572 wrote:
Lem Evans wrote:I just wonder how ugly a dome would be that would service a 100 cc chamber...and give large comp. ratio?

About 19cc less ugly than a 119 cc chambered BBC dome would look like................

The STOCK PRODUCTION dome on an L88 Chevrolet piston is 48 cc's.
The intake valve and hindered airflow are only in that piston dome pocket from about 10 degrees BTDC to about 20 degrees ATDC; all below .250" of opening valve lift.

good thing these heads kick ass in the mid numbers! lol!

bruno on August 30th 2011, 9:12 pm

would you mind post your flow #s and what cam are you using Cool ?

cool40 on August 30th 2011, 9:50 pm

bruno wrote:would you mind post your flow #s and what cam are you using Cool ?

these#'s were on a 4.5 bore,thats big as they had. Rolling Eyes

int.
.200=176
.300=241
.400=321
.500=400
.600=452
.700=472
.800=486
.900=498
ex.
.200=153
.300=204
.400=246
.500=302
.600=334
.700=348
.800=359
.900=368
ex is w/o a pipe.

cool40 on August 30th 2011, 10:01 pm

bruno wrote:would you mind post your flow #s and what cam are you using Cool ?

the cam is a B.F.Evans monday morning special. Wink

it's mild.i may try a Snake oil blend too.

dfree383 on August 31st 2011, 10:48 am

IDT-572 wrote:
Lem Evans wrote:I just wonder how ugly a dome would be that would service a 100 cc chamber...and give large comp. ratio?

About 19cc less ugly than a 119 cc chambered BBC dome would look like................

Thats still alot of Ugly !!!! cheers

rmcomprandy on August 31st 2011, 9:57 pm

dfree383 wrote:
IDT-572 wrote:
Lem Evans wrote:I just wonder how ugly a dome would be that would service a 100 cc chamber...and give large comp. ratio?

About 19cc less ugly than a 119 cc chambered BBC dome would look like................

Thats still alot of Ugly !!!!

A Big Block Chevy can get a bit more than 15/1 compression with a 598 however, it WILL usually make more power with only slightly over 14/1 compression ratio. Can you guess why...? LOL

138 on August 31st 2011, 10:07 pm

lghting94 on September 1st 2011, 7:22 am

Less Dome