Porsche 944 Valve-piston collision
07-02-2004, 08:53 PM
#16
Burning Brakes
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Location: Atlanta, GA
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Originally posted by Dave
A chain wouldn't last 10 minutes in a 944, Porsche used a belt for a reason.
We have a fairly tall block made of aluminym alloy, it expands quite a bit as it heats up. The belt streches as the block expands, a chain would just snap. This is also the reason that the belt service interval is so short, all that streching shortens the lifespan of the belt.
A chain wouldn't last 10 minutes in a 944, Porsche used a belt for a reason.
We have a fairly tall block made of aluminym alloy, it expands quite a bit as it heats up. The belt streches as the block expands, a chain would just snap. This is also the reason that the belt service interval is so short, all that streching shortens the lifespan of the belt.
The sending unit for the temp guage is also different on the engines. The '84 will have a one wire slide on connector while the '87 will have a two wire fuel injector type connection. Sorry, but I dion't know of any other differences.
*edit* Duh, socal beat me to the temp sender
07-03-2004, 12:24 AM
#17
Race Director
Chain-drive cams do work, they just need more complicated housing so they can be bathed in oil all the time. Also automatic chain-tensioner would be needed to apply constant tension, kinda like the hydraulic unit on Japanese cars.
Those pistons look OK, just grind off the high-ridges that were pushed up by the valve so that you don't have any hot spots.
Those pistons look OK, just grind off the high-ridges that were pushed up by the valve so that you don't have any hot spots.
