Real time dyno

[Martin Evans]

Todd Knighton <knighton at net-quest.com> wrote:

>tom cloud wrote:
>> 
>>My specific requirement has been to tune my current (Holley) EFI.
>>The Idle, Midrange, Accelerator Pump, and Choke adjustments are
>> simple enough.  It's the Power adjustment that's too darned
>> subjective for me.  I used my EGO (but it's probably deteriorated
>> with age -- ~ 14 years and 150,000 miles), and, of course, it tells
>> me I'm either rich or richer.  And frankly, I'm not one to want to
>> do a bunch of timed runs to find the optimum setting.  Seems to me
>> being able to adjust acceleration for a peak would be a good way
>> to adjust operation at WOT (understand I have a little more than
>> 4 or 5 seconds to work with here).
>> 
>> So, what's a J&S knock sensor?

>Get a good EGO sensor firts, then something that will tell you when
>you're in the 12.8 to 13.3 range, if you're running on Normal Gasoline
>and normally aspirated.  That will be you're peak power range.  Have
>never found a resource to tell me differently.
>If you calibrate for acceleration, you might burn the motor up before
>you find it.  Most engines like leaner settings to produce peak power,
>but they don't last long there.
>A J&S knock sensor is an aftermarket knock sensor unit that will
>intercept the ignition signal and alter it according to individual
>cylinder knock.  He's also got a monitor that will tell you how much
>each cylinder, or group, is retarding so you can go back and adjust your
>timing till no lights come on.  Works great for a calibration tool.
>Listed his phone and address for someone else in a previous post today.

The "previous post" hasn't appeared in any of the digests received this 
week. Can you please repost details of the J&S knock sensor?

Martin Evans
100341.377 at compuserve.com