GTS vs S4 crankshaft
06-01-2010, 12:39 AM
#16
Addict
Rennlist Member
Rennlist Member
http://www.ret-monitor.com/articles/...rankshafts.pdf
By the way, those pics are awesome.
That S4 crank pic w/ the nice depth of field was taken w/ Jim's 18-200 VR lens. Also as an FYI, that crank isn't stock. It was drilled by Jay @ Taylor Engine. For the purposes of this discussion though, the counterweights are stock.
Last edited by Dennis K; 06-01-2010 at 01:05 AM.
06-01-2010, 01:13 AM
#17
Nordschleife Master
Thread Starter
If you can't see the pics on the webpage, you can download the article in pdf format here:
http://www.ret-monitor.com/articles/...rankshafts.pdf
By the way, those pics are awesome. That S4 crank pic w/ the nice depth of field was taken w/ Jim's 18-200 VR lens. Also that crank isn't stock. It was drilled by Jay @ Taylor Engine.
http://www.ret-monitor.com/articles/...rankshafts.pdf
By the way, those pics are awesome.
That S4 crank pic w/ the nice depth of field was taken w/ Jim's 18-200 VR lens. Also that crank isn't stock. It was drilled by Jay @ Taylor Engine.The center main journal hole gives a hint that something not entirely stock is going on with the crank.
The pdf article and the html page are quite different. The pdf, for example, doesn't have any mention of 6 vs. 8 cw crankshafts.
In any case, just killing time wondering if there's a decent crank hiding inside either one of these...
06-01-2010, 05:50 AM
#18
Race Director
I am not an engineer, I was merely relaying info I got from other people who are engineers and build engines...
If the 8 wt design is worse, why did Porsche do it & why do SO many modern race engines use it...the 8400rpm M3 uses 8 weights & makes 103.5 HP/L
http://www.rcollins.org/m3/RS46/DSC02293.jpg
It is interesting that the LS7 uses a 6 weight design....but turns "only" 7000rpm, even thought the far longer stroke moves the pistons over 10% faster than the M3
06-02-2010, 01:02 AM
#19
Nordschleife Master
Thread Starter
If the 8 wt design is worse, why did Porsche do it & why do SO many modern race engines use it...the 8400rpm M3 uses 8 weights & makes 103.5 HP/L
It is interesting that the LS7 uses a 6 weight design....but turns "only" 7000rpm, even thought the far longer stroke moves the pistons over 10% faster than the M3
It is interesting that the LS7 uses a 6 weight design....but turns "only" 7000rpm, even thought the far longer stroke moves the pistons over 10% faster than the M3
928, advantages, counterweighted, crankshaft, engine, fully, gts, inertia, krankshaft, momentum, piston, s4, summing, total, v8
