Re: Your Piston Specs - B1 head valve reliefs
[Re: 440Jim]
#2890532
02/19/21 02:33 PM
02/19/21 02:33 PM
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Joined: Dec 2011
Posts: 201 Texas
Chief
enthusiast
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enthusiast
Joined: Dec 2011
Posts: 201
Texas
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Jim, here is my Ross piston sheet. 4.5x4.5. But they are for a .500 short hemi block (original 10.750 deck) with a 7.100 rod. Hope it helps. Originally designed for a Brewer Head but valve pockets are same for B1. 2.30 and 1.78. [img] https://i.imgur.com/rdMeswi.jpg?1[/img] Dave
Dave Covey
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Re: Your Piston Specs - B1 head valve reliefs
[Re: 440Jim]
#2890752
02/19/21 09:23 PM
02/19/21 09:23 PM
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Joined: May 2004
Posts: 854 Brisbane Australia
572B1
super stock
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super stock
Joined: May 2004
Posts: 854
Brisbane Australia
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Thanks Dave. Interesting that Ross doesn't put the valve pocket diameter on that sheet. The racer that gave me the Ross box (insert?) above gave me his sheet also, and it doesn't show the dia on the sheet, just on the box info. FWIW, his 1.36 CH pistons weighed 574 grams. This is what his flat top valve reliefs looked like. Hi Jim, I have 4.5'' Venolia pistons to suit B1 originals. PM me with your phone number and I will send the pictures to your phone. I don't know how to send pictures on this site. Your welcome to post my pictures on here when you receive them. cheers Rob.
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Re: Your Piston Specs - B1 head valve reliefs
[Re: 572B1]
#2890767
02/19/21 09:57 PM
02/19/21 09:57 PM
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Joined: Feb 2005
Posts: 20,173 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,173
PA.
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I could take some pictures of my old pistons but they were 440-1 pistons and Tom Hemphill cut them for B1 pistons so I could run either heads. I changed them out for ones more nitrous friendly.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Your Piston Specs - B1 head valve reliefs
[Re: pittsburghracer]
#2890832
02/20/21 01:27 AM
02/20/21 01:27 AM
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Joined: Mar 2003
Posts: 6,334 Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,334
Heaven
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Jim I will have to see if I can dig up all my old info. It was so long ago I don’t remember off the top of my head. CP Nitrous Pistons. Photo was from the Sept ‘05 Mopar Muscle article on my motor.
Wes
Last edited by EvilB1Dart; 02/20/21 01:32 AM.
"Any fool can know. The point is to understand"
- A. Einstein
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Re: Your Piston Specs - B1 head valve reliefs
[Re: 440Jim]
#2891970
02/22/21 07:19 PM
02/22/21 07:19 PM
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Joined: Jan 2003
Posts: 16,925 NC
440Jim
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I Live Here
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OP
I Live Here
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NC
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What valve relief diameters and depths have you used? Intake pocket dia:________Exhaust pocket dia:________ Intake pocket depth:______Exhaust pocket depth:______
Thanks to those who posted. Related to above, how much bigger in diameter do you think the valve reliefs should be, compared to the valve dia? i. e. I have 2.30 dia intake valve, should the relief be 2.35 dia or what?
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Re: Your Piston Specs - B1 head valve reliefs
[Re: B1MAXX]
#2892175
02/23/21 11:01 AM
02/23/21 11:01 AM
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Joined: Dec 2011
Posts: 201 Texas
Chief
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enthusiast
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Texas
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that's only .025 radially. too close for all the moving parts. Should be 2.400 giving .050 radial clearance. I wouldn't want my intake valve that close (.025) to clipping the notch. Agree, also might want to think about the largest valve you can put in the head. You may want to upgrade at a later time.. Dave
Dave Covey
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Re: Your Piston Specs - B1 head valve reliefs
[Re: Chief]
#2892715
02/24/21 02:49 PM
02/24/21 02:49 PM
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Joined: Feb 2004
Posts: 2,073 Tulsa, Ok
WadeMetzinger
top fuel
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top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
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Here are a few specs on the B1 pistons I've ordered.
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
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Re: Your Piston Specs - B1 head valve reliefs
[Re: 440Jim]
#2892755
02/24/21 04:06 PM
02/24/21 04:06 PM
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Joined: Sep 2003
Posts: 1,049 San Jose Ca.
boatracer572
super stock
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super stock
Joined: Sep 2003
Posts: 1,049
San Jose Ca.
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Don, Is that a clay molded impression of the piston top? Its a combustion chamber mold
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