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 Post subject: Deck Clearance
 Post Posted: Fri Jan 08, 2010 8:33 pm 
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Joined: Sun Apr 30, 2006 6:20 am
Posts: 357
Location: Wodonga, Australia
Hi Guys

When you guys set up your piston to deck clearance, do you always shoot for zero. Was wondering if any of you drop the pistons down say 10 or 15 thou so you could maybe deck the block again if ever required.

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 Post subject: Re: Deck Clearance
 Post Posted: Fri Jan 08, 2010 10:08 pm 
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Joined: Tue Apr 18, 2006 6:38 am
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Location: Coming At Ya!
MINE ARE .003 OUT OF THE HOLE WITH AN .040 GASKET! She's been 8600 with zero problems! In fact, I ran that same block at 003 out on a 23* engine for about near 9 years.

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 Post subject: Re: Deck Clearance
 Post Posted: Sat Jan 09, 2010 11:06 am 
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Joined: Wed Dec 06, 2006 9:24 pm
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Location: Elizabethtown, KY
Ken0069 wrote:
MINE ARE .003 OUT OF THE HOLE WITH AN .040 GASKET! She's been 8600 with zero problems! In fact, I ran that same block at 003 out on a 23* engine for about near 9 years.


Ours is about the same with 23* heads milled.070. Ours was 0 but when they redid the mains they pushed out a little. I know a couple of guys run them out more.

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 Post subject: Re: Deck Clearance
 Post Posted: Sat Jan 09, 2010 1:41 pm 
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Joined: Wed Apr 19, 2006 4:11 pm
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Location: Shepherdsville, KY
Mine are even with the deck with a .042 gasket. I run titanium rods. I think I used to run an extra .030 when I ran aluminum rods. Of course I think it's a matter if you want to maximize the performance with the highest possible compression ratio or stay a little conservative and try to leave room for damage repair.

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 Post subject: Re: Deck Clearance
 Post Posted: Sat Jan 09, 2010 5:50 pm 
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Joined: Sun Apr 30, 2006 6:20 am
Posts: 357
Location: Wodonga, Australia
Gearhead

Ye thats exactly what I was getting at, but I dont want to sacrifce HP. Was thinking of leaving them 15 below the deck but that just means taking more of the heads. Well that isnt much use then anyway as you leave little damage safety in the heads. Suppose I could always start with the thinnest head gasket and have some safety margin in the block and head, then if need be, can machine some of those surfaces and then just increase the head gasket thickness.

Thanks guys

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VK Commodore
383 Holden
2 speed Glide
Everthing on this car is all done by myself
650 HP Plus 300 Nos
Best so far
1.38 60 ft, 6.3 1/8 at 110 mph and 10.2 at 135 mph, long way to go before i reach my low nine hey


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 Post subject: Re: Deck Clearance
 Post Posted: Sat Jan 09, 2010 5:59 pm 
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Joined: Wed Apr 19, 2006 12:57 pm
Posts: 672
Location: Hatboro PA.
If a customer brings in a block to get decked i leave them .005 in the hole unless they say different. As piston to wall increases the piston will rock over and take up most of the deck clearance.

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http://www.rogersperformance.com/


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 Post subject: Re: Deck Clearance
 Post Posted: Sat Jan 09, 2010 6:55 pm 
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Joined: Tue Apr 18, 2006 10:44 pm
Posts: 1507
Location: Tennessee
Good advice Mike, my old 496 was .004 out and loose. It would make contact with the head. Never gave any trouble, just removed a little out of the chambers and good to go.

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