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#2
03-21-2010, 03:36 PM
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Explain how that would work. Reducing the stroke would also dramatically lower compression levels, and the engine would likely not even run.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) 
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#3
03-21-2010, 03:39 PM
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longer pistons? what's the point? (I know nothing about this subject)
__________________
1983 240D 3.0T 4-speed manual, now sold  1989 Subaru GL Wagon 5-speed Touring Edition
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#4
03-21-2010, 03:51 PM
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Quote:
__________________
Jimmy L. '05 Acura TL 6MT  2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China"  Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
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#5
03-21-2010, 05:25 PM
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That would be like putting a 2mm oversized piston in a 3.0L 603 block.
On a side note, I think a 3.5L 603.970/1 crank with a 3.0L 603.961 rods (installed either the 3.0 or 3.5 block) would make a pretty good torque motor. Theoretically using this combo will alter the rod/stroke causing the piston to remain at top dead center longer creating more torque. But all this would work if you can make customs pistons for the correct compression ratio and won't burn up. .
__________________
1983 123.133 California - GreaseCar Veg System 
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#6
03-21-2010, 07:15 PM
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Shortening the stroke will not change the TDC time, still making a circle on the C-rod end.
As far as torque, should reduce torque as the lever arm is decreased. However, typically better for high RPM.
__________________
 Gone to the dark side - Jeff
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#7
03-21-2010, 09:14 PM
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The extra torque of the 3.5l is very nice, I wouldn't want to lessen it. When working correctly the 603.97 is a very nice driver.
-Jason
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#8
03-23-2010, 12:47 PM
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Well,
Yes if you put 3.0 crank in it- you put 3.0 l rods in it too. Thought that would be obvious. The reason is the 3.5's have reliability problems because of the bore/stroke ratio. Factory for a time had beefed up rods and pistons. M
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