AFR BBF Head

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Post  Lem Evans on November 2nd 2018, 9:23 am

1830-16 Comp Cams

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Post  Lem Evans on May 24th 2019, 9:46 am

Gary Blair wrote:
Lem Evans wrote:AFR BBF Head - Page 12 Afr_210
AFR BBF Head - Page 12 Afr_110
AFR BBF Head - Page 12 Afr_410

AFR deal with custom dome.

Nice looking piston work.

Rebco?

Is that 14.4-1 with the 75 CC chamber?

75cc. Diamond custom.

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Post  HorsinAround on June 14th 2019, 11:55 am

What push rods do you recommend? AFR recommends 3/8" thick wall, and my cam will be an .819 lift, so I want to get the best set possible to limit side deflection and good tips.

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Post  Lem Evans on June 14th 2019, 12:17 pm

HorsinAround wrote:What push rods do you recommend? AFR recommends 3/8" thick wall, and my cam will be an .819 lift, so I want to get the best set possible to limit side deflection and good tips.


Depends on the cam and valve springs used.
.135" wall x 3/8" are used in many applications.

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Post  HorsinAround on June 14th 2019, 1:44 pm

Lem Evans wrote:
HorsinAround wrote:What push rods do you recommend? AFR recommends 3/8" thick wall, and my cam will be an .819 lift, so I want to get the best set possible to limit side deflection and good tips.


Depends on the cam and valve springs used.
.135" wall x 3/8" are used in many applications.

Gotcha. As I mentioned the max cam lift is .819 (I'll have to look at the cam card when I get home to get all the specs) and I am using the PAC Racing #1224 1.625" OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850" maximum lift.

I have always used Comp push tubes, but did have trouble with a tip collapsing usually once or twice a season on the pulling truck and the lift wasn't quite as big. Also this is a 533 drag motor build, so it won't see the rpm that the puller saw...
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Post  Lem Evans on June 14th 2019, 3:00 pm

HorsinAround wrote:
Lem Evans wrote:
HorsinAround wrote:What push rods do you recommend? AFR recommends 3/8" thick wall, and my cam will be an .819 lift, so I want to get the best set possible to limit side deflection and good tips.


Depends on the cam and valve springs used.
.135" wall x 3/8" are used in many applications.

Gotcha. As I mentioned the max cam lift is .819 (I'll have to look at the cam card when I get home to get all the specs) and I am using the PAC Racing #1224 1.625" OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850" maximum lift.  

I have always used Comp push tubes, but did have trouble with a tip collapsing usually once or twice a season on the pulling truck and the lift wasn't quite as big. Also this is a 533 drag motor build, so it won't see the rpm that the puller saw...

I get our rods from the same place Comp does only cheaper.

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