Need more P/V clearance in a BB mopar

ss3011 · 04-19-2018, 09:43 AM

Indicator method is good , but usually gives the closest value . When the real springs are used the clearance will be greater . Would be nice to be able to run the cam advanced , but that would be based on dyno testing .

Glenn Briglio · 04-19-2018, 10:26 AM

Quote:

Originally Posted by ss3011

Indicator method is good , but usually gives the closest value . When the real springs are used the clearance will be greater . Would be nice to be able to run the cam advanced , but that would be based on dyno testing .

As Russ says, check with actual spring pressure. You'll have more p to v clearance.

GallopinGhost · 04-19-2018, 02:09 PM

I think for now we'll leave the valve job as is, I'd hate to lose anything there. I really just need to decide how much to deck the head. Once I get the head from the shop, I'll check it with race springs and see where it's at. Then I'll just get a gasket that will give me what is needed. This project is taking forever and I just want it on the track. Next winter I can do some of the trimming of the valve head and maybe re-grind the cam, hopefully that will enable me to then get a thinner gasket and get some of the compression back. thanks all

Larry Hill · 04-21-2018, 08:15 AM

While you are waiting on next winter find out what is available for gaskets, pistons, rods, and block deck height. In your spare time learn how to juggle. lol

Patric Fox · 04-21-2018, 08:28 AM

The Steel Shim head gaskets for a small block are very hard to find, the Mr. Gasket head gaskets are .028, about as thin as I have found. Might not be able to get the .021 gaskets you mentioned. I was taught not to sink the valves. So I wouldn't personally do that if there was another solution.

Coleydog · 04-21-2018, 12:23 PM

Well Brian looks like we're in the same boat. Someday you and I will get these cars done. Look out world. LOL
I need to get down there a take a look see.
Mike

GTX JOHN · 04-21-2018, 05:16 PM

I am confused.......How can you tell piston to valve clearance BEFORE
you CC Heads and know how much they will be milled. It is not unusually
to mill BB Mopar heads .060 or more to get the correct specs.
Every thousand you mill them bring them closer to piston.
How can you measure accurately piston to valve prior to finishing the heads
that are actually being used on engine

What did I misread on this post?

GallopinGhost · 04-21-2018, 08:27 PM

I'm enjoying the juggling match now, but then again, I don't have a running engine yet. Lol

Quote:

Originally Posted by Larry Hill

While you are waiting on next winter find out what is available for gaskets, pistons, rods, and block deck height. In your spare time learn how to juggle. lol

04-19-2018, 09:43 AM	#1
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Need more P/V clearance in a BB mopar Indicator method is good , but usually gives the closest value . When the real springs are used the clearance will be greater . Would be nice to be able to run the cam advanced , but that would be based on dyno testing .

04-19-2018, 02:09 PM	#3
GallopinGhost Member Join Date: Jun 2010 Location: VA Posts: 230 Likes: 23 Liked 21 Times in 13 Posts	Re: Need more P/V clearance in a BB mopar I think for now we'll leave the valve job as is, I'd hate to lose anything there. I really just need to decide how much to deck the head. Once I get the head from the shop, I'll check it with race springs and see where it's at. Then I'll just get a gasket that will give me what is needed. This project is taking forever and I just want it on the track. Next winter I can do some of the trimming of the valve head and maybe re-grind the cam, hopefully that will enable me to then get a thinner gasket and get some of the compression back. thanks all __________________ Brian Carpenter Stock 1358

04-21-2018, 08:15 AM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,644 Likes: 1,941 Liked 10,739 Times in 2,234 Posts	Re: Need more P/V clearance in a BB mopar While you are waiting on next winter find out what is available for gaskets, pistons, rods, and block deck height. In your spare time learn how to juggle. lol __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

04-21-2018, 08:28 AM	#5
Patric Fox Member Join Date: Jul 2007 Location: Pottstown,Pa. Posts: 121 Likes: 24 Liked 11 Times in 8 Posts	Re: Need more P/V clearance in a BB mopar The Steel Shim head gaskets for a small block are very hard to find, the Mr. Gasket head gaskets are .028, about as thin as I have found. Might not be able to get the .021 gaskets you mentioned. I was taught not to sink the valves. So I wouldn't personally do that if there was another solution.

04-21-2018, 12:23 PM	#6
Coleydog Senior Member Join Date: Jul 2014 Posts: 572 Likes: 39 Liked 53 Times in 38 Posts	Re: Need more P/V clearance in a BB mopar Well Brian looks like we're in the same boat. Someday you and I will get these cars done. Look out world. LOL I need to get down there a take a look see. Mike

04-21-2018, 05:16 PM	#7
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,803 Liked 2,486 Times in 697 Posts	Re: Need more P/V clearance in a BB mopar I am confused.......How can you tell piston to valve clearance BEFORE you CC Heads and know how much they will be milled. It is not unusually to mill BB Mopar heads .060 or more to get the correct specs. Every thousand you mill them bring them closer to piston. How can you measure accurately piston to valve prior to finishing the heads that are actually being used on engine What did I misread on this post? __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 04-21-2018 at 05:19 PM.