Board logo

SAW & PIP
Andi - 14/11/08 at 10:19 AM

Im almost ready to tackle the dark art of Megajolt, and although there isnt a great deal of info on the net, SAW & PIP keep popping up.
What are they?????

Thanks in advance.

coozer - 14/11/08 at 10:37 AM

just an in out type signal for timing. Nothing to worry about, just connect to the right terminals and hey presto!

r1_pete - 14/11/08 at 10:47 AM

As Coozer says, treat it as black box, as long as the connections are correct it just works...

02GF74 - 14/11/08 at 10:55 AM

SAW = Spark Advance Word ; the width of the pulse represents the spark advance, is sent to EDIS.

PIP = Profile Ignition Pick-up, signal to represent engine speed.

MikeRJ - 14/11/08 at 12:34 PM

quote:
Originally posted by 02GF74
SAW = Spark Advance Word ; the width of the pulse represents the spark advance, is sent to EDIS.

PIP = Profile Ignition Pick-up, signal to represent engine speed.


Just to expand slightly on this, SAW is an input to the EDIS module, and generated by the Megajolt/squirt to control spark advance. With no SAW the EDIS defaults to 10 degrees BTDC, which is why you can run a carb'd engine without a Megajolt connected to the EDIS.

The PIP signal is an output from the EDIS unit and goes back to the Megajolt/squirt so it can determine engine speed and when it should send the SAW pulse back to the EDIS.

sebastiaan - 14/11/08 at 01:04 PM

have a read here

mediabloke - 14/11/08 at 01:10 PM

^^^What they said, plus if you find that your rev counter bounces around and then disappears, wire the tacho input to the PIP connection instead of the tacho output on the megajolt.

Result: works a treat!


[Edited on 14/11/08 by mediabloke]