 What about a 1807 cc ? 90x71 |
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| johannes |
 Mar 11 2009, 05:11 AM
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#1
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Club Porsche 914 France President  Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France  |
Would it be possible to build a 1807 cc using a 71 crank to improve a 66x90 1.7 engine ?
I was always told that stroke matters. You could also keep your 1.7 heads ... Wouldn't it be the cheapest way to improve a 1.7 ? Are rods available for such an engine ? |
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| 914Sixer |
Mar 11 2009, 07:31 AM
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#2
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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Won't work because of the difference in rod offset I think.
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| type47 |
Mar 11 2009, 07:42 AM
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#3
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
Two things come to my mind. To the best of my knowledge, the size of the journal, that is, the part of the crankshaft that the "big end" of the connecting rod attaches to, is a different size for the 2 different crankshafts. That could be solved by using 2.0 L rods (maybe, I don't know if there are other issues). Then, the increased stroke affects the piston position at top dead center (TDC) so with the increased stroke, might (I hope the Cap'n will put things correct) make the piston top stick out of the top of the cylinder. But that could be solved too ........ somehow....... Cap'n?
I said, "to the best of my knowledge...." (IMG:style_emoticons/default/idea.gif) I like your idea though. I've never heard of the combo and could make use of alot of engines that are disregarded since they are "only 1.7's" |
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| johannes |
Mar 11 2009, 07:54 AM
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#4
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Club Porsche 914 France President Group: Members Posts: 3,084 Joined: 13-January 06 From: France Member No.: 5,409 Region Association: France |
I remember Jake speaking about an improved 1.7 using type 1 rods but I can't find the post.
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