History - 917 "genes" in the 914 2.0L, The Porsche Racing Dept Engineering input |
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914/4: 70 71 72 73 74 75 76 914/6: 70 71 72
History - 917 "genes" in the 914 2.0L, The Porsche Racing Dept Engineering input |
Tom_T |
Dec 6 2009, 03:35 PM
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#1
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TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California |
UPDATED 12/21/09 & (IMG:style_emoticons/default/santa_smiley.gif) to all!
While the 917 is not strictly 914, it is historical info from the period & definitely original info. from the factory & race drivers of the day. And the pay-off for the link after this "shameless hook", is the info in the thread of how an Engineer from the Porsche Racing Department was able to make the lowly VW 1.7L 4 banger into a respectable "Porsche-bred" 90-100 hp 2L engine - when VW thought it was impossible to go any bigger & had been max'ed out at 1.8L (+/- 200% - recall it started in the 1930's VW as only about 900 cc). See the videos at the link below, & also peruse the additional clips at the sidebar after viewing this one linked below, including those linking to racing 914/6's..... <snipped> If you like racing and the sounds of Porsches, you will love this video: YouTube - Porsche 917 <end snip> Enjoy! Courtesy of our local PCA-OCR membership chair! (IMG:style_emoticons/default/biggrin.gif) Then read the lively discussion on the link between the 917 & 914-2.0 engines, of which even the "Master of 914 O&H" was not aware! (IMG:style_emoticons/default/biggrin.gif) ...Heck! - even I'm learning stuff I didn't know from others of you out there, which I always do! (IMG:style_emoticons/default/biggrin.gif) |
eitnurg |
Dec 20 2009, 04:26 AM
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#2
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Country Member Group: Members Posts: 150 Joined: 31-December 02 From: Nairobi Member No.: 62 Region Association: None |
Undoubtedly different, but not the reason. A boxer has a seperate crankshaft throw for each cylinder, so each pair of opposed opposed pistons are at TDC and then BDC etc simultaneously, like clapping hands. An inherently well-balanced design. A vee has a common crankshaft throw per pair of cylinders, which at 180° are directly opposed, so when one is at TDC its counterpart is at BDC. Not well balanced at all, but it does gain a shorter crankshaft, useful if dimensions have to be kept tight.
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