[Fot] CRANKCASE EVACUATION SYSTEM

[N197TR4 at cs.com]

GM has a typical check valve for $10-15 if you make your own.

This system will:  "...provide better piston ring seal, less intake charge 
contamination, and reduced oil leaks caused by high crankcase pressure."

This is from a circle track catalog. A little marketing hype built in here, I 
sense.

Moroso, Mr. Gasket, and Renegade provide these kits to the circle track guys. 
There are pieces uneeded for Triumphs and no hi temp poly tubing, which may 
be the most expensive item.

I have no understanding of why they are not permitted in the SCCA GCRs. 
Likely for good reason in certain applications...V-8s?

But for TR3/TR4 engines, it seems like an appropriate modification. 

I was putting a lot of oil into the frame rails and then would dump it ON the 
exhaust pipe at Turn Five at Road America. Not a very pretty cloud of oil 
smoke and of some concern to the corner workers. 

After going home, I would let the TR4 drip for a couple of weeks, then wipe 
it down.

This system changed all of that.

Joe A



> Bill,
> 
> To avoid ANY back pressures you should fit a one way / check valve at the
> exhaust venture. These type of check valves are available on some emission
> vehicles. Problem solved. That what I have on my TR4.
> 
> Peter V
> TR-4
> 

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