To deck or not to deck
+3
dfree383
IDT-572
BigRigTech
7 posters
Page 1 of 1
To deck or not to deck
My D1VE block is at the machine shop to be bored .060" over, it hasn’t been decked as I was told it was by the seller...it’s at 10.310" deck height. Carl’s custom SCJ/P51 Probe slugs are 1.756 compression height, with the 6.605" rod that puts me .024" down in the hole. With a 4.500" bore HG at .041" crushed that show’s 11.3:1 compression. I'll be using straight AV100 leaded fuel. Am I safe to deck it with my “Cheapskate 466 proven build” A429 heads that have been milled to 62cc and if so how much???
My stock 2YABC crank magged ok so balancing is next.![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
My stock 2YABC crank magged ok so balancing is next.
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: To deck or not to deck
How much?
![Question](https://2img.net/i/fa/i/smiles/icon_question.gif)
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
Re: To deck or not to deck
On a stock block I would do zero. But some on here will tell you to leave a little for clean up. Maybe .005. But I always zero mine. Never had any deck problems to have to clean up. And if I did I would just dust .005 off the pistons and carry on.
IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: To deck or not to deck
I was thinking of taking .020 off and that would leave me .004 down.
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
Re: To deck or not to deck
Sounds good, .020 will make a good increase in compression and help quench.
IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: To deck or not to deck
What Blake said!
dfree383- BBF CONTRIBUTOR
- Posts : 14832
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: To deck or not to deck
are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
i always mock it up and see what the actual clearance is,stuff varies.
bbfstanger- Posts : 223
Join date : 2013-08-02
Re: To deck or not to deck
Zero deck is magic.....it's worth somewhere between 37 & 87 hp.
About .005" below the the deck @ tdc will work good & after the jackass that is milling the block misses the 'zero' thing....you will still be 'zero' rather than .005" out.
![Laughing](https://2img.net/i/fa/i/smiles/icon_lol.gif)
About .005" below the the deck @ tdc will work good & after the jackass that is milling the block misses the 'zero' thing....you will still be 'zero' rather than .005" out.
Re: To deck or not to deck
^^^^^^^^^^^^thisbbfstanger wrote:are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
![Question](https://2img.net/i/fa/i/smiles/icon_question.gif)
cool40- BBF CONTRIBUTOR
- Posts : 7308
Join date : 2009-08-31
Age : 53
Location : on the 1/8 mile dyno
Re: To deck or not to deck
bbfstanger wrote:are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
Yes, that is just the "math" on the whole deal....I was already considering what you suggested. Let me ask this question considering possible future use, at 11.3:1 could this engine be run on the street with a 50/50 mix of 91 octane and leaded AV??? There is no emission testing here.
![Wink](https://2img.net/i/fa/i/smiles/icon_wink.gif)
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
Re: To deck or not to deck
Not a bad idea.^^^^^^^^^^ Also I get 4.36+.060=4.420. I don't know if you are using a compression calculator, or if the 4.5" was a typo? .000, .005, .010 are not pretty small amounts, just sayin. Nevermind the bore,I see you put Head gasket.bbfstanger wrote:are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
supervel45- Posts : 4493
Join date : 2013-09-04
Re: To deck or not to deck
Yeah, I looked up the Felpro head gasket the shop suggested to get the crush thickness and bore size. I was using this calculator when I was bored at work.
http://www.csgnetwork.com/compcalc.html
![Rolling Eyes](https://2img.net/i/fa/i/smiles/icon_rolleyes.gif)
http://www.csgnetwork.com/compcalc.html
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
Re: To deck or not to deck
Those calculators are nice and make life easy. I don't know what cam you are planing to use, but 91/Av gas sounds doable, if timing, cam, and carb jetting are optimum, to me. I want to get some of Carls pistons also with the dual reliefs, they give you alot of options.
supervel45- Posts : 4493
Join date : 2013-09-04
Re: To deck or not to deck
Here is the cam I'll be using.
![To deck or not to deck Cam_zpsf88df2a7](https://2img.net/h/i222.photobucket.com/albums/dd196/BigRigTech/cam_zpsf88df2a7.jpg)
![To deck or not to deck Cam_zpsf88df2a7](https://2img.net/h/i222.photobucket.com/albums/dd196/BigRigTech/cam_zpsf88df2a7.jpg)
BigRigTech- Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada
Re: To deck or not to deck
What do they claim the Lobe Seperation to be, 111degree?
supervel45- Posts : 4493
Join date : 2013-09-04
![-](https://2img.net/i/empty.gif)
» Modifying an intake, tall deck to short deck
» How much to deck?
» block spec..
» 10.200 deck
» Zero deck & Quenching
» How much to deck?
» block spec..
» 10.200 deck
» Zero deck & Quenching
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