cast 4v flow numbers

cast 4v flow numbers

Joined: February 13th, 2006, 4:59 am

May 24th, 2011, 9:44 pm #1

I just had these heads flowed,I ported these over 20yrs ago borrowed a grinder from cousin and got at it.Here's the numbers.

IN EXH.
100. 71 60.3
200 139.9 101.8
300 205 142.2
400 258 172.8
500 301.5 194.1
600 317.4 203.1
700 322.2 201.3

average intake 230.7 exh 153.7
these are 2.19 and 1.71 valves

No wonder these motors make power!
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Joined: January 10th, 2002, 5:53 pm

May 25th, 2011, 2:37 am #2

Especially on the exhaust - it's s struggle for a home porter to get 200 CFM out of the 4Vs. Take a 2V and 220 CFM is not so hard, go figure. Like she said, it's not all about size but what you can do with it.

1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.
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Joined: February 13th, 2006, 4:59 am

May 25th, 2011, 4:26 am #3

Thanks Falcon67
I was just starting then and I beleive it took about 2 weeks to do both heads a little after work each night.But it was fun back then and agood learning experience.Never did flow them just ran and thought they were better?It was kind of cool to see where they were.
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Joined: February 13th, 2006, 4:59 am

May 27th, 2011, 12:37 am #4

What is about the best cfm you can get out of 4v's on a bench??I've heard in the neighbor hood of 350cfm intake and 225 exh?Is that true or has anyone seen better?
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Joined: September 24th, 2008, 6:30 pm

May 27th, 2011, 1:19 pm #5

I seen a thread on YellowBullet where a guy in Australia got close to 390 CFM. I would post a link, but I'm at work and can't open YB.
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Joined: February 13th, 2006, 4:59 am

May 27th, 2011, 2:16 pm #6

That is right up there with the Kaase 400 heads wow.Other than light weight there is no real need to buy aluminum heads is there!
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Joined: September 24th, 2008, 6:30 pm

May 27th, 2011, 2:41 pm #7

Speedtalk not YB. Not sure how true it is, but I have no reason not to believe it.

http://speedtalk.com/forum/viewtopic.ph ... cbda75c163
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Joined: July 24th, 2008, 10:06 pm

June 1st, 2011, 10:54 pm #8

Kid Vicous posted a list of flow Cleveland 4v numbers a few years ago it was a set he ported, one set some one alse ported and two sets of 4V stock heads. This gave a good idea how will a 4v Cleveland can flow. Even the stock intakes flow some big numbers.
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Joined: February 13th, 2006, 4:59 am

June 3rd, 2011, 4:51 am #9

just wondering if they are still posted here somewhere?
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Joined: August 2nd, 2003, 5:23 pm

June 3rd, 2011, 5:09 am #10

Actually it was on my website. I have it down right now.
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