Originally posted by Bildon@Jan 24 2006, 04:36 PM
>> is a dial indicator

That requires a tear down. Not gonna happen. Might be easy to pull the VC on a Golf but on many cars its a very large undertaking. Plus after seeing the tear downs that have happened I have no confidence that cam profiles could be measured properly at an event by voluteers with no prior experience doing so.

COMPRESSION GAUGE AND DISPLACEMENT PUMPS !

COMPRESSION GAUGE AND DISPLACEMENT PUMPS !

COMPRESSION GAUGE AND DISPLACEMENT PUMPS !
[snapback]71880[/snapback]
The problem with both of those is that they don't usually work. I'm not sure what you would do with a compression gauge - there are way too many variables to have the PSI generated in the cylinder by the starter motor mean anything.

And the displacement pumps are great in NASCAR, where all of the engines have rocker arms, but really hard to implement in sports car racing, where most of the engines have overhead camshafts operating directly on the valve lifters. Don't forget, for one of those gizmos to work, you have to disable the valves for at least the cylinder you're checking. That's very hard on most all of the cars that we race.

Cheers,

Chris Camadella
ITS Porsche 944