 explanation and discussion on engine building |
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| type47 |
 Mar 21 2005, 01:48 PM
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#1
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Viermeister  Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region  |
found this post and was encouraged. http://www.914world.com/bbs2/index.php?act=...f=2&t=21651&hl=
i'm now at the same point putting a euro piston 2.0L d-jet motor together and need the wisdom of the 914 club board (jake, brad, dave...). i am a first timer at cc'ing heads (i made another post about that) and think i did an OK job, at least, one that i'm going with. all my chambers are about 61-62 cc's like joes in the above referenced post. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) i measured the deck height and got .03" .03" .035" and .04" (by the way, for a novice, it would have been nice to put inches or mm on the numbers, i didn't know if i was way off or .......) from what i've learned, i will but the base gaskets on (above done w/o) to give a little more deck. what's the CR? (stock crank, 71mm) any other comments? (i'd like to lap the cylinders in the heads tomorrow (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif) ) |
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Replies(1 - 5)
| Mueller |
Mar 21 2005, 01:55 PM
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#2
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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| nebreitling |
Mar 21 2005, 02:06 PM
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#3
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
i'd run a min. of .040 deckheight and then flycut the heads as necessary to achieve an 8.5:1 ratio.
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| Jake Raby |
Mar 21 2005, 02:48 PM
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#4
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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 |
What cam did you run??? 8.0 is the max I would ever go with the stock cam......
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| nebreitling |
Mar 21 2005, 04:42 PM
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#5
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
try to get the DH between cylinders a little more even, too.
.010" is a lot of variance. i've got 049, 049, 049, 050 on 50cc fly-cut heads. toss the head gasket and shim up if you need to, of course. listen to jake 'bout the cam (disclaimer: still learning this stuff myself; YMMV) |
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| type47 |
Mar 21 2005, 08:45 PM
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#6
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
many thanks for the replies (IMG:http://www.914world.com/bbs2/html/emoticons/clap.gif)
Jake: cam is stock. thanks for your advice i'll remeasure tomorrow. thanks for the engine calc link. if i deck at .055 w/61cc the CR is 8.1. is that still too much for a stock cam? |
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