What heads would you use for racing?

What heads would you use for racing?

Joined: March 30th, 2010, 9:02 am

July 8th, 2012, 12:33 pm #1

Hi,
I am about to order a set of heads to replace the 4V's on my 1650lb altered.
What would you guys pick out of the AFD's, Scott Cook heads and the CHI 3v 225's?
Each supplier has their own opinions (as they should), so I would like some opinions from owners or engine builders.
I have a 370,w/ .725 lift roller,alky carbs,8200+rpm.
Thanks
Chris

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Joined: December 16th, 2003, 1:59 am

July 8th, 2012, 5:07 pm #2

http://www.survivalmotorsports.com/Blue ... block.html

there'll be phantoms, there'll be fires on the road... and the white man dancing
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Joined: May 20th, 2005, 4:48 pm

July 8th, 2012, 5:47 pm #3

Hi,
I am about to order a set of heads to replace the 4V's on my 1650lb altered.
What would you guys pick out of the AFD's, Scott Cook heads and the CHI 3v 225's?
Each supplier has their own opinions (as they should), so I would like some opinions from owners or engine builders.
I have a 370,w/ .725 lift roller,alky carbs,8200+rpm.
Thanks
Chris
Brent Lykins
B2 Motorsports, LLC






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Joined: September 5th, 2006, 1:33 am

July 8th, 2012, 8:44 pm #4

http://www.survivalmotorsports.com/Blue ... block.html

there'll be phantoms, there'll be fires on the road... and the white man dancing


X2 on Blue Thunder heads. If it were not for a race-only Altered, it would be between Trick Flow and CHI, for me.

A Visigoth explains the sack of Rome: We wanted art, literature...culture! We're sorry we broke some stuff.
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Joined: October 1st, 2004, 8:05 pm

July 8th, 2012, 9:53 pm #5

Hi,
I am about to order a set of heads to replace the 4V's on my 1650lb altered.
What would you guys pick out of the AFD's, Scott Cook heads and the CHI 3v 225's?
Each supplier has their own opinions (as they should), so I would like some opinions from owners or engine builders.
I have a 370,w/ .725 lift roller,alky carbs,8200+rpm.
Thanks
Chris
i.e. Yates C3H, SC1 or D3; Blue Thunder 4.3 ... you get the idea, there's many choices these days for heads with 4" high intake ports

If you're really considering going racing with the stuffed 4V port heads then give very strong consideration to Scott's heads. The ports & chambers are designed by Darin Morgan, and his design is faithfully reproduced via CNC manchining with each and every head. These heads need no further porting, they are fully ported & ready to go out of the box. Unless somebody thinks they can improve upon Darin Morgan's work.

I'm helping Scott promote his heads, but I'm not making a cent doing so. I'm doing it simply because I am enthusiastic about the product, I have a set here, they are works of art. And the gentleman who is manufacturing them is a class act.

Brent needs to get his hands on a set of these too ...

-G
____________________________________________________________

Pantera Photos | 351C Historic Information | 351C Technical Information

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Joined: October 23rd, 2005, 1:22 am

July 8th, 2012, 10:07 pm #6

Thanks G,
I have 3 new designs thanks to Darin.. These ports are machined in the same Stock appearing Casting".
1 X Standard height intake port
2 x Raised .250" intake port's

one is a max effort deal with 37cc chamber , .500"- 343cfm .900" - 402cfm 2.190" Valve
George may post up the Prototype flow figure sheet if he still has it? G, did i send that over to you?

I will have a matching full Race Intake manifold to suit in the next few weeks to..

Chris, what compression are you running ?

Scott
Last edited by GT-SCOTT on July 8th, 2012, 10:47 pm, edited 1 time in total.
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Joined: October 1st, 2004, 8:05 pm

July 8th, 2012, 10:55 pm #7

Here's the data Scott

Head number 1: SMALL PORT, STD PORT LOCATION, SHALLOW CHAMBER
382.6 max cfm; 316.4 average cfm
Good for 350 to 400cid engine in the 3500 to 7000rpm range.

Head number 2: 0.250" RAISED LARGE PORT, STD DEEP CHAMBER.
398.2 max cfm, 325.9 average cfm
Good for 350 to 440cid engine in the 5500 to 7500rpm range.

Head number 3: 0.250" RAISED LARGE PORT, SHALLOW CHAMBER.
401.2 max cfm, 328.8 average cfm
Good for all out engine from 350 to 440cid in the 5500 to 8000rpm range.

All 3 cylinder heads have 2.190 intake valves and 1.600 exhaust valves

Flow-Pro Data
Intake Port Flow ACFM

Valve Lift...No.1....No.2....No.3
---------------------------------------------------------
0.2000.....158.3...154.8...152.3
0.3000.....221.5...224.0...224.6
0.4000.....287.5...293.2...295.4
0.5000.....321.4...339.0...343.3
0.6000.....351.9...369.0...370.6
0.7000.....368.3...380.7...384.2
0.8000.....381.5...387.8...396.4
0.9000.....383.7...393.7...402.3
1.0000.....381.9...399.3...402.4
----------------------------------------------------------
Average...317.3...326.8...329.7





-G
____________________________________________________________

Pantera Photos | 351C Historic Information | 351C Technical Information

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Joined: March 30th, 2010, 9:02 am

July 8th, 2012, 11:15 pm #8

Thanks G,
I have 3 new designs thanks to Darin.. These ports are machined in the same Stock appearing Casting".
1 X Standard height intake port
2 x Raised .250" intake port's

one is a max effort deal with 37cc chamber , .500"- 343cfm .900" - 402cfm 2.190" Valve
George may post up the Prototype flow figure sheet if he still has it? G, did i send that over to you?

I will have a matching full Race Intake manifold to suit in the next few weeks to..

Chris, what compression are you running ?

Scott
Thanks for the reply's guys.
At this stage I am only considering the 3 Aussie made heads.
I was looking for the pro's and con's on those 3.
Thanks
Chris
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Joined: October 23rd, 2005, 1:22 am

July 8th, 2012, 11:53 pm #9

Flow Data . Thanks G ! n/m
Last edited by GT-SCOTT on July 8th, 2012, 11:53 pm, edited 1 time in total.
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Joined: December 10th, 2010, 3:28 pm

July 9th, 2012, 4:04 am #10

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I run these Yates , 835n/a on 358ci
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