Variable Compression, Variable Displacement you deside

[James Seabolt]

At 11:34 PM 2/17/98 PST, you wrote:
>ref Espen Hilde:
> One other thing, about turbo motors that doesn't help there life
>expectancy IMHO is that during gear changes the turbo due to
>it's inertia is still spooled up and immediately after the gear change
>there is a millisecond of uncontrolled boost, once it's shaft speed
>drops things are right again.  In the "lower gears" this isn't as
>much of an issue since the engine still has the toque muliplication
>of the tranny from loading it to much.  Then like in the turbo 
>Buicks it's right after the 2-3 gear change that knock is most 
>likely. 
>  Bruce   First really big cone shaped hat driving experience,  in
>              70- 71 finding a Dodge Daytona Winged Warrior, me 
>              sports car (thought was fast) down shifted 2x at 65, so
>              did Plymouth, he drove away so fast I started to open
>              the door to get out and check under the hood......


They make a device called a blow-off valve which fits between the turbo and
the intake which relieves pressure when this happens.


James Seabolt -----> mailto:jseabolt at preferred.com
Webpage: http://pages.preferred.com/~jseabolt
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1980 FIAT 2000 Spider (injected)
1981 FIAT X 1/9 (Injected)
1994 JEEP Wrangler (2.5l )
1976 Chevrolet Pickup (454 Big Block)