Ben Baltrusaitis wrote:

Paul, is it necessary to enlarge the exhaust ports also?
Thanks!
Ben

Ben Baltrusaitis wrote:

Paul, is it necessary to enlarge the exhaust ports also?
Thanks!
Ben

Don't know yet. We will dyno it with the stock turbo exhaust ports.
I discussed it with Dave Lemon but no firm conclusions so far.

Paul Lamar

Paul, The interesting thing is that piston engines have always had about 
20% more inlet than exhaust port area.
Bill Jepson

Yep that is interesting. I think it has to do with the pressure difference.
Exhaust gas has a greater pressure difference behind it.
Also there is limited room for poppet valves in a piston engine so larger
intake valves at the expense of the exhaust valves generates more power.

     Paul Lamar

Paul, My assumption has always been there is less to exhaust than to take
in. Since the fuel air mix it combusted to provide the power, the
by-products are less ( in volume) than the intake charge.
Bill Jepson

Counter intuitive is it not?
Paul Lamar

William wrote:

Combustion of hydrocarbon fuels releases h20, CO2, and other byproducts that
INCREASE the volume of exhaust over the intake. If you didn't get a volume
increase, there would be no power stroke.

Bill Schertz
KIS Cruiser # 4045

Bill, while I have you on the line we are in the R&D stage on the best glue
to use for bonding the P-port tubes. What I have so far is RF-5407AS
Ceramic Filled Epoxy Potting System. Alumina filled. 

Ever heard of it?

Curing agent is RF-9
Supposed to be good to 250 to 300 F. Pourable and room temp cure.

Specific gravity is 2.1
Color is off white.
Thermal conductivity (Cal)(cm)/(sec)(cm^2)(degree C) is 40 x 10^-4

Know anything about this stuff?

Main problem is it is $80 bucks a quart.
It also cost a bunch to ship as it is toxic. 

Paul Lamar

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