<VV> Re: Turbo set up--was mileage

[FrankCB@aol.com]

Norm,
    First, you definitely need to add a boost gauge that shows every psi (or, 
even better, every 1/2 psi) so you can tell what effect on boost level these 
changes produce.  I'd also recommend having TWO cylinder heat temp gauges, one 
for each head.  And you should consider using a wastegate to keep control of 
the boost level.
    If you're planning on going over 15 psi boost, then you will need the 
forged pistons.  The Jet Hot coatings on the exhaust system should be applied to 
the INSIDE of the manifolds and piping to try to limit the metal temp.  If you 
don't do this then the stock crossover pipe will overheat and disintegrate 
likely where it makes the big bend going from horizontal to vertical.  (Go 
ahead, ask me how I know this.(:-)  In addition, overtemperaturing the crossover 
pipe between the heads will result in excessive thermal expansion and loosen the 
bolts to the manifolds, resulting in exhaust leaks.  To prevent that, you 
need either a slip joint or a bellows connection in the crossover pipe unless you 
can correctly apply the Jet Hot coating INSIDE the piping.
    Follow Bob Helt's recommendations ("The Classic Corvair") for setting up 
squish/quench spacing in the 95 heads.
    Regarding the Petronix II and the SafeGuard, I'd suggest you contact Ray 
Sedman to see if the Petronix I might be adequate, since the variable dwell 
feature of the Petronix II is duplicated in the SafeGuard.
   Even with the stock 10 psi boost level, you should add either an 
intercooler or water injection to bring down the temp of the air out of the compressor. 
 The engine can only take in a certain VOLUME of air in each revolution.  The 
cooling will increase the DENSITY of this air so that the same VOLUME 
contains more WEIGHT (mass) of air, and, of course, the oxygen that is part of it.
    Getting all these changes to work well together will require lots of 
research and planning.  And of course, you might be limited by cost factors.
    "Oh what a tangled web we weave, when first we try to get more power".
    Good luck,
    Frank Burkhard

In a message dated 11/16/04 1:50:06 PM Eastern Standard Time, 
ncwitte@wittelaw.com writes:
Wow.  

This is interesting.  

So to get to specific cases, assuming that I want a streetable but better 
than stock performance motor of the following:

Stock carb with vacuum port
180 impeller/150 turbine wheel
Jet hot coating on exhaust manifolds, exhaust pipes
.030 over forged pistons
95 hp heads
95 hp distributor
Pertronix II
Flamethrower coil
Safeguard
NA vacuum advance

What would you keep?  What would you skip? What would you add?

Norm