Need more P/V clearance in a BB mopar

Chevy55 · 04-19-2018, 08:48 AM

Cut the valve face a few thousands.
Also the cam could be ground to twink the duration, you won't lose compression and horsepower loss is negligible.

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

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, 08:48 AM	#1
Chevy55 Banned Join Date: Nov 2014 Posts: 324 Likes: 625 Liked 179 Times in 89 Posts	Re: Need more P/V clearance in a BB mopar Cut the valve face a few thousands. Also the cam could be ground to twink the duration, you won't lose compression and horsepower loss is negligible.

04-19-2018, 09:43 AM	#2
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	#4
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	#5
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,650 Likes: 1,941 Liked 10,763 Times in 2,237 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	#6
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	#7
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

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