Hi guys -

I recently took on THREE rotary jobs (2 2nd gen series 5s and 1 20B single turbo).

The first was with an old school Haltech e6x. I am not a huge fan of the Haltech but I tune a number of them, this was my first rotary with a from-scratch Haltech install.

The ONE thing I liked about the Haltech was the procedure for setting timing using just the trailing plugs, I learned this from Steve Kan. I had a problem where the timing on the leadings looked right, but the engine ran badly, so I asked Steve and he pointed me to the method of setting timing using the trailing spark. It turned out that the car's owner realy had no clue about how to stab the CAS - he was way, way off.

I want to do the same thing with my next install (this week), which is MS2-Extra with a Zeal board.

My question is this: in order to "lock" the trailing plugs at 15 degrees, can I just set the leading map to all 15s (or lock timing at 15) and set the split map to 0 across the board?

Thanks,
-Scott Clark

 

you have to set the timing for fix advance to -5 and line that to the 1st line to the pulley and then set the trailing table to 0 and all plugs should fire at the same time.

 

You can also set a fixed split.

Just set leading to a known value (like -5) then set the trailing fixed split to make trailing line up with the trailing timing mark.

For the 20B, we have a special rotary mode in ms3 that supports leading and trailing and sequential staged fuel on up to 4 rotors in the 1.1 alpha code on ms3, so hopefully that's what you'll be using!

Ken

 

Thanks guys.


The 20B has a Haltech wired up, but the owner is happier with his Megasquirt'd cars (1JZ supra on EMSpro, 13BT on MS2-Extra) so I have a feeling we'll be trying to run the 20B on a Megasquirt-3x. It depends.


I'll keep you posted, again thank you for the help!

-Scott