To deck or not to deck

Go down

To deck or not to deck

Post  BigRigTech on April 17th 2014, 1:28 pm

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
avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  IDT-572 on April 17th 2014, 2:37 pm

Yes
avatar
IDT-572
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 4604
Join date : 2008-12-02
Age : 57
Location : Shelbyville Tn.

View user profile

Back to top Go down

Re: To deck or not to deck

Post  BigRigTech on April 17th 2014, 2:52 pm

How much? Question 
avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  IDT-572 on April 17th 2014, 2:55 pm

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.
avatar
IDT-572
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 4604
Join date : 2008-12-02
Age : 57
Location : Shelbyville Tn.

View user profile

Back to top Go down

Re: To deck or not to deck

Post  BigRigTech on April 17th 2014, 2:59 pm

I was thinking of taking .020 off and that would leave me .004 down.
avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  IDT-572 on April 17th 2014, 3:00 pm

Sounds good, .020 will make a good increase in compression and help quench.
avatar
IDT-572
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 4604
Join date : 2008-12-02
Age : 57
Location : Shelbyville Tn.

View user profile

Back to top Go down

Re: To deck or not to deck

Post  dfree383 on April 17th 2014, 4:06 pm

What Blake said!
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14162
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: To deck or not to deck

Post  bbfstanger on April 17th 2014, 9:53 pm

are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.

bbfstanger

Posts : 221
Join date : 2013-08-02

View user profile

Back to top Go down

Re: To deck or not to deck

Post  Lem Evans on April 17th 2014, 10:03 pm

Zero deck is magic.....it's worth somewhere between 37 & 87 hp.  Laughing 
 
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.

Lem Evans

Posts : 7148
Join date : 2008-12-03
Location : Livermore , Ky

View user profile http://bfevansraceparts.com

Back to top Go down

Re: To deck or not to deck

Post  cool40 on April 17th 2014, 10:37 pm

bbfstanger wrote:are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
^^^^^^^^^^^^this  Question 
avatar
cool40
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 7168
Join date : 2009-08-31
Age : 47
Location : on the 1/8 mile dyno

View user profile

Back to top Go down

Re: To deck or not to deck

Post  BigRigTech on April 17th 2014, 10:42 pm

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
avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  supervel45 on April 17th 2014, 10:48 pm

bbfstanger wrote:are you just adding up the specs?
i always mock it up and see what the actual clearance is,stuff varies.
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.

supervel45

Posts : 3084
Join date : 2013-09-04

View user profile

Back to top Go down

Re: To deck or not to deck

Post  BigRigTech on April 17th 2014, 10:55 pm

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. Rolling Eyes 

http://www.csgnetwork.com/compcalc.html
avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  supervel45 on April 17th 2014, 11:01 pm

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 : 3084
Join date : 2013-09-04

View user profile

Back to top Go down

Re: To deck or not to deck

Post  BigRigTech on April 17th 2014, 11:11 pm

Here is the cam I'll be using.

avatar
BigRigTech

Posts : 763
Join date : 2013-06-17
Location : Hatchet Lake, Nova Scotia, Canada

View user profile

Back to top Go down

Re: To deck or not to deck

Post  supervel45 on April 17th 2014, 11:38 pm

What do they claim the Lobe Seperation to be, 111degree?

supervel45

Posts : 3084
Join date : 2013-09-04

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum