On Mon, 23 Dec 2002, Mike Munson wrote:
> Bob,
Hi Mike,
> You would be doing real good to get more than 165 out of your motor with
> 11:1 and 28 mm chokes. Carillo rods IMHO won't be needed until 14:1. I
> ran stock rods up to 13.5:1 without any problems.
Kool - 13+:1 is the next, next motor. There's always a next motor.
:-)
> I think I've told you
> off list what kind of compression we have run in the past to get over
> 200 hp with 28mm chokes.
Ya, I guess you did. I do know that the national guys run pretty intense
compression ratios... but thier budgets are likely orders of magnitude
more than mine!
> IMHO desktop dyno programs are for bench racers and if you want cold
> hard figures hook the flywheel up to a real Dyno. Our real figures never
> matched up to those programs.
That's the answer I was looking for. Thanks!
> Is 90 lb/in what piper recommended for seat pressure. To clarify are you
> running 90 lb/in or 90 lb/ft seat pressure?
Whoops - my bad. 90 lb/in. The recommended pressures are less than this,
but I had the springs cryo-treated and for some reason they came out
stiffer. We just installed them as-is - it's an autocross motor and does
not see that many hours between overhauls. In the machinist's words:
"where'd you get those springs, Bob? They're pretty "stout"."
Yep - they are.
> Mike
regards,
rml
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