 What's the lowest deck height you guys have run?, bump'n it up |
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| nebreitling |
 Mar 3 2005, 04:25 PM
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#1
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Member Emeritus  Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478  |
yeah, i know .04 to .06 is standard...
does anyone run anything less without carnage? i'm shooting for a 9.5:1 compression ratio with a 2056. i'll know head CC's tonight, but i'm just thinking out loud right now. cam is from Elgin: .288 duration/ .333 lift thx, n |
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| Dave_Darling |
Mar 3 2005, 04:49 PM
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#2
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914 Idiot Group: Members Posts: 14,981 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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I believe I recall reading on the Shoptalk Forums that some folks had run 0.035" deck. Raby chimed in as well... Memory is foggy on this, I think he said he had built one motor with 0.025"? But if I'm remembering it correctly, he sweated for hours and hours over making absolutely certain that everything was spot-on.
--DD |
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| SLITS |
Mar 3 2005, 06:12 PM
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#3
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
0.032" and don't miss a shift at high rpm (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
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| ChrisFoley |
Mar 3 2005, 07:19 PM
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#4
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I am Tangerine Racing Group: Members Posts: 7,922 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Depends on your rpm limit and what rods you have.
With stock rods and 6.5K rpm you need at least 40 thou. With Carillo rods you can get as close as .030 if everything is carefully set up, even up to 8k. It's not the valve clearance thats a problem with low deck height its rod stretch at high rpm and the pistons hitting the head. |
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| Jake Raby |
Mar 3 2005, 07:36 PM
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#5
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
I have ran .025
I'd run no less than .035 just to be safe, some pistons can expand .005 at temperature.. |
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| nebreitling |
Mar 3 2005, 07:50 PM
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#6
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
thanks guys, good to know. i'm shooting for app~ 52ccs at 045. 9.5:1 ought to do it.
6krpm is all this engine will see. hopefully. |
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