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Mine spintech is
a little smaller than Tracy's but I don't remember how much. Again, as I
remember the guy at Spintech didn't care about aircraft use. Also, there
was no scientific reason for the two inch in/out, and some have recommended a
smaller diameter, like 1.5 to 1.75.
Thanks for the info Tommy.
The non-scientific reason for your 2" in/out may have been that it's
the minimum size Spintech lists :-)
I have a couple Racing Beat header flanges, and they
have 2-1/8" holes. I'll look at the actual port size, and see if maybe
that can be cut down a bit. The smaller diameter pipe would be easier
to work with, but I certainly don't want to make it so small that it hurts
the flow at 7500 rpm.
What diameter pipe are you guys
using? Larger size after collector?
Would #9 "Y-Collector/Center" be an effective
collector, or is there not enough pipe after the two join together to provide a
good scavenging effect?
Do you get any scavenging effect at all out of a design
like #7, with dual inlets, and one outlet.
If you used a design like #10, with dual inlets
and dual outlets, and then put a collector after the outlets. Would get
any scavenging effect?
Sorry for all the questions, but I have a lot of
catching up to do on exhaust design.
I plan to be down
your way the week after Christmas to fly again. Maybe bring it to NC if it
proves itself well enough.
Regards,
Tommy<><
Good luck. I'm sure you'll be happy
to have the airplane at your new
home.
Cheers,
Rusty (I'm already exhausted...
sorry)
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