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From: Lehanover@aol.com
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Date: Sat, 22 Jan 2005 13:54:54 EST
Subject: Re: [FlyRotary] Dynos II (was Re: changed to Octane)
To: flyrotary@lancaironline.net
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In a message dated 1/22/2005 12:08:34 PM Central Standard Time, 
dale.r@cox.net writes:

<<  A year ago, when Paul gave me a quick tour of his newly 
 reconstituted shop (after moving from Tucson to Phoenix) 
 he actually quoted me a figure for dyno time - basically 
 describing, as you said, that a session would have to be 
 scheduled for at least six hours.  I figured once I got 
 the engine built and run in, it would be worth $800 to get 
 confirmation that I was getting the ponies I was seeking.
 Perhaps he thought I was going to buy an engine from him?
 I don't think so - considering that I started out asking 
 about sources for some parts I needed, and talked about 
 the engine I was building for my "off-road" vehicle.
 
    I'm assuming that this is a policy change due to his shop 
 being busy enough now, that he no longer needs the income 
 from taking in outside work.
  >>


I cannot speak for Paul Yaw specifically, but only in the most general terms. 
If you can get onto a dyno that will produce recorded data, and be on long 
enough to do some serious tuning, it is going to cost quite a bit of money. The 
setup to adapt the home built engine to the dyno takes more time than 
anything. 

When I was doing it, even less complex than todays engines, with engine 
controllers and ignition controllers and so on. The guest engine will have a 
Jimmy's aluminum siding and engine controller co. injection system, with the 
ignition from a Fairthop Electron Minor. 
If it is dry sumped, figure an extra day before you hear it run. The engine 
builder has a formula for a number of engine types he builds and every one fits 
his dyno lashup, and can be hooked up in 15 minutes. 

If this dyno is used on a collection of home built engines, there must be two 
boxes full of hoses, adaptors (to get the oil pressure from BSP "O" ring 
flange to AN-4 male) and so on. Wires with assorted ends looking like the wire end 
museum.

Observe what connections must be adapted and write them down. Have the 
correct connections on you next engine when you bring it in, have the throttle arm 
moving in the correct direction, and a bracket mounted to hold the dyno 
throttle cable, and save hundreds on the next visit and get more actual time to boot. 
Good planning can make your visit a very pleasant and productive deal. And 
take the exhaust system you plan to use. It might end up in a dumpster close by.

4 hours on Pauls dyno with him doing the tuning is far more valuable than 
unlimited time on a dyno where the operator has never seen a rotary. I would 
expect to pay
$1,500 a day for good help on a dyno. $800.00 is a gift.

Lynn E. Hanover