Testing the HiRev 7500

Bewy said

The first 5 min was enough or me.
What the gentleman ignores is that it could be the electronics in his m/c that is causing the retard.

The only true way to see if the ign is retarding [ or advancing ] is to watch the ign trace on a dual trace osciloscope, where you can see the initial generation of the spark v the spark being delivered on the time axis. Once you have the time difference & rpm, you can calculate any retard.

Click to expand...

I don’t know what to say. You can see in the video the box CLEARLY retards.

By your theory you can’t use my test bench to test for advance.

Now we have no idea if we even can trust a timing curve according to you.

Edit: I didn’t say it in the video because I didn’t think it necessary but evidently it needs to be said.

I know it’s not in the machine. How do I know that?

Because I can run just a points distributor and it will NOT retard.

A Unilite will not retard.

Both show ZERO advance or retard at any RPM.

I guess I need to spend more time making video with just a points distributor to show what zero retards looks like.