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how much to deck heads
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MMT Pro Member
Joined: Sat Oct 30, 2010 4:53 pm Posts: 156 
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 how much to deck headsI know this has been tossed around some on here after searching the forums for info. I never ran across some solid numbers. Does anyone know what compression = how much decking.
Say you wanted to run no more than 9.5 :1...how much would you deck the heads? I may be wrong but on pump gas you should not go over 10:1 correct? |
| Thu Apr 07, 2011 10:20 am |
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MMT 1000 Club  Joined: Wed Feb 04, 2009 7:50 pm Posts: 3833 Location: Old East Dallas, Texas
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Re: how much to deck heads Stay conservative
_________________ Excel 1851F4 w/ MB35HD+R CDI with a little bit of this and little bit of that |
| Thu Apr 07, 2011 8:10 pm |
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MMT Pro Member
Joined: Sat Oct 30, 2010 4:53 pm Posts: 156
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Re: how much to deck heads I understand your point and agree. Just trying to figure out how much compression some of these .060 decked heads are running vs lets say .025
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| Thu Apr 07, 2011 9:04 pm |
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MMT 1000 Club  Joined: Wed Jan 14, 2009 5:23 am Posts: 4514 Location: Lafayette, La
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Re: how much to deck heads Id say nothing more than .030
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| Thu Apr 07, 2011 9:12 pm |
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MMT Elite Member  Joined: Tue Jan 13, 2009 6:08 pm Posts: 5376 Location: Venice, La
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Re: how much to deck heads What if you took a 10:1 motor and made it pull in 1.5 cups? would 1.5 x 200= BOOM?
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| Thu Apr 07, 2011 9:51 pm |
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MMT Pro Member  Joined: Fri Apr 10, 2009 8:05 pm Posts: 258 Location: Port Neches, Tx
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Re: how much to deck heads just put flat top pistons in, and don't deck
_________________ 1754 Gatortail with 35 GTR 1748 prodrive pushed by a genny (SOLD) I shoot black mallards does that make me guilty of a hate crime? |
| Thu Apr 07, 2011 10:02 pm |
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MMT Elite Member Joined: Tue Jan 13, 2009 6:08 pm Posts: 5376 Location: Venice, La
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Re: how much to deck heads |
| Thu Apr 07, 2011 10:15 pm |
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MMT Elite Member Joined: Tue Jan 13, 2009 6:08 pm Posts: 5376 Location: Venice, La
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Re: how much to deck heads |
| Thu Apr 07, 2011 10:19 pm |
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MMT 1000 Club Joined: Wed Feb 04, 2009 7:50 pm Posts: 3833 Location: Old East Dallas, Texas
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Re: how much to deck heads _________________ Excel 1851F4 w/ MB35HD+R CDI with a little bit of this and little bit of that |
| Fri Apr 08, 2011 5:46 am |
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MMT Elite Member  Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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Re: how much to deck heads Deck your heads in the .020-.030 range.
_________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327 |
| Fri Apr 08, 2011 6:19 am |
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MMT Elite Member  Joined: Tue Jan 13, 2009 7:53 pm Posts: 7515 Location: Chauvin
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how much to deck heads I love seeing all you Briggs fe's giving advice on head decking....
_________________ 1750 GatorTail Extreme/Stage 3 37 GTR HD Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself. |
| Fri Apr 08, 2011 7:28 am |
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MMT 1000 Club Joined: Wed Jan 14, 2009 5:23 am Posts: 4514 Location: Lafayette, La
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Re: how much to deck heads Well do tell then Mr Briggs
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| Fri Apr 08, 2011 7:55 am |
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MMT Elite Member Joined: Wed Jan 14, 2009 7:23 am Posts: 6233 Location: Tarkington, TX
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Re: how much to deck heads _________________ Bayou Surface Drive 337-351-0362 Tarkington, TX 77327 |
| Fri Apr 08, 2011 7:57 am |
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MMT Elite Member Joined: Tue Jan 13, 2009 7:53 pm Posts: 7515 Location: Chauvin
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Re: how much to deck heads _________________ 1750 GatorTail Extreme/Stage 3 37 GTR HD Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself. |
| Fri Apr 08, 2011 4:16 pm |
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MMT 1000 Club Joined: Wed Jan 14, 2009 5:23 am Posts: 4514 Location: Lafayette, La
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Re: how much to deck heads OOPS === guess thats what I get for not reading it all the way -- LOL
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| Fri Apr 08, 2011 5:36 pm |
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MMT Addict
Joined: Wed Jan 14, 2009 6:57 am Posts: 659
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Re: how much to deck heads Stock Briggs is 8.5 to 1.
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| Fri Apr 08, 2011 7:18 pm |
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MMT 1000 Club  Joined: Mon Jul 27, 2009 8:10 pm Posts: 1436 Location: down da bayou
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Re: how much to deck heads im no mechanic but it sounds like if you leave your heads stock you would have more power, just put a cam exhaust and carb and be done with it...correct?
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| Fri Apr 08, 2011 7:24 pm |
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MMT Addict
Joined: Wed Jan 14, 2009 6:57 am Posts: 659
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Re: how much to deck heads Both will make more power. Do both together and make a lot more power.
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| Fri Apr 08, 2011 7:50 pm |
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MMT Pro Member
Joined: Sat Oct 30, 2010 4:53 pm Posts: 156
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Re: how much to deck heads The point of my post was simply to see if anyone knew what kind of compression was being run from say .060 decked heads and say .025 decked heads since I have read those numbers allot on here. Stock compression according to vangaurds web site says 8.2 to 1. ( http://www.vanguardengines.com/vanguard ... al%20Shaft
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| Fri Apr 08, 2011 8:33 pm |
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MMT Elite Member Joined: Tue Jan 13, 2009 7:53 pm Posts: 7515 Location: Chauvin
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Re: how much to deck heads _________________ 1750 GatorTail Extreme/Stage 3 37 GTR HD Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself. |
| Sat Apr 09, 2011 7:25 am |
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MMT Elite Member  Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: how much to deck heads So what would be best to deck my heads wit, a hammer and chissel or a hacksaw ???
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| Sat Apr 09, 2011 8:21 am |
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MMT Elite Member Joined: Tue Jan 13, 2009 7:53 pm Posts: 7515 Location: Chauvin
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Re: how much to deck heads _________________ 1750 GatorTail Extreme/Stage 3 37 GTR HD Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself. |
| Sat Apr 09, 2011 8:22 am |
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MMT Elite Member Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: how much to deck heads |
| Sat Apr 09, 2011 8:27 am |
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MMT Elite Member
Joined: Wed Mar 03, 2010 7:00 pm Posts: 6060 Location: Choudrant, La
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Re: how much to deck heads Make sure you have plenty of silicone , it holds up better than stock gaskets and hugs the contours of the grind if not done evenly.
_________________ CSM Custom 18x42 Battleship with a 36 PD beating you to the hole My Rig (Old Motor) viewtopic.php?f=5&t=45193 (New Motor) viewtopic.php?f=5&t=54733 Stumps Fear Me |
| Sat Apr 09, 2011 8:29 am |
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MMT 1000 Club Joined: Wed Jan 14, 2009 5:23 am Posts: 4514 Location: Lafayette, La
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Re: how much to deck heads |
| Sat Apr 09, 2011 10:26 am |
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MMT Elite Member Joined: Wed Jan 14, 2009 7:54 pm Posts: 5582
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Re: how much to deck heads Figures.....
The first thing that comes to Brad's mind is allways food. |
| Sat Apr 09, 2011 10:31 am |
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MMT Elite Member Joined: Tue Jan 13, 2009 6:08 pm Posts: 5376 Location: Venice, La
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Re: how much to deck heads This thread is about ENGINE compression not ASS compression Brads!
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| Sat Apr 09, 2011 10:40 am |
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MMT 1000 Club Joined: Wed Jan 14, 2009 5:23 am Posts: 4514 Location: Lafayette, La
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Re: how much to deck heads Compression is compression -- lOL
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| Sat Apr 09, 2011 10:41 am |
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MMT Elite Member Joined: Tue Jan 13, 2009 6:08 pm Posts: 5376 Location: Venice, La
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Re: how much to deck heads |
| Sat Apr 09, 2011 10:44 am |
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