and dont forget another relay for trailing coils.

That's right, I keep forgetting to put that one down.

All checked out fine. So the above does work but I did change a few things that I actually like. The clutch switch that I bypassed then ran 12v thru it for trigger switch lets me lean in the window and crank it up. Also the push button I mounted on a plate along with both switches. I removed the ash tray, plasma cut a plate to fit in the spot. I will post some pics. Only thing I have to figure is the boost it makes is less than I thought. I am only running 1 rpm module in the 2 step. with it set to 7800rpm it only made .3 bars?

You'll have to use an input on your ecu off the 2-step trigger wire, and use it to retard timing and dump fuel to build more boost.

You should consider running a relay off that clutch switch for the starter interlock, most racing bodies need you to push the clutch in to start the car.

thats odd. Erik Cheatham's old msd install notes are for a msd 6al and 2 step with PFC. He was seeing 17psi @8k? But he was running a 8k and 8.2k module. I was under the impression the module #2 was for 2 step and module #1 was for rpm cut. So since I am using my ecu to cut max rpm's I left module #1 empty.

wonder if my trailings are'nt cutting off?

No, you need to use both modules in the msd. Do it now and let me know! :egrin:

make sure you've got the pedal to the metal

^^^^:icon_tup::icon_tup::icon_tup:

Eric, were you cutting rev's with the second module? I believe you were running a 8k and
8.2k so was 8.2 your max thru each gear? I have another adjustable module that goes to 8.2 so I could try the same but I like to have my rev cut at 9.5k since I always over rev 1st gear :lol:

Allen, thanks for all the info!

Trotts, thanks for the write up and PM's!

pic
 

here is how I mounted the switches. The relay's are tucked under the back of console except the trailing relay, mounted it up front.

Yeah, my RPM Rev Limiter was 8.2 and second module was 8k.

Get it working, then worry about shifting later :lol:

You might find that 8k is too much, it was for me atleast. I couldn't hook with the 2 step. It was just blow the tires away. I got my best 60 by just free revving (1.43). I'm sure with a little testing and adjusting, I could have gotten it to hook but that was right around the time I was selling it.

Try it and let me know.

Eric, were you doing any ignition retarding/fuel dumping for anti-lag, or was it just pedal to the metal 2-step???

Nope, I was just shutting the coils off putting my foot through the floorboard..

2 step in action
 

Here is it set at 8k and 8.2k

http://www.youtube.com/watch?v=ZmnJBimPOk8

How much boost did it make?

around 11.5psi If rain holds off I will try some other rpm's to see what happens at the track in the morning. Heck I am not even sure it will hook with the 11 yet.

Awesome dude! Yeah, I think the turbo depends alot on what PSI you get....and fuel

I also wonder the tune. This was on pump gas. So my q16 tune may act a little differant.

Thanks for all the help guys..

Bump for bacon! Read thru it man. Post questions on this thread and we will help a brother out!

OK so this is way easier than I thought, heres my issue, im runnign a crane Hi-6R for my leadings, and on the msd 8739 instructions it shows a 2 pin connector plugging into the msd box. now the hi-6 does have a rev limit wire avial, and if im reading the instructions its only active when that wire sees 12v, so I might just need a relay to shut off the tralings, and send 12v to the yellow/white wire to the hi-6 to engage my stage limit.

b/c the whole concept is shut off trailing, and rev limit leadings. right? the 2 step dosent do anything more than that right? now i wonder if this will work the way i want it to since the hi-6 has sequental rev limiting to prevent poppong and banging.....wtf

I wouldn't use the Hi-6Rs rev limiter. Stick with the MSD and you cant go wrong.

so do i have to ditch the hi-6 for a msd? I dont understand how to get the msd 2step box to work with the hi-6, it seems to be just set up for the msd

I feel like im missing something

It has to do with the way that the MSD cuts the ignition. I don't know how gentle the Hi-6 is on the motor but the MSD is a proven setup. You can try the cut on the Hi-6 and i am sure it will build boost but i can't say how it will treat the motor. Maybe someone else on here has tried it and can vouch for it. You are correct about the MSD two step not working with the crane, it is designed to plug in where the MSD rev limit pills plug in on their products.

I had HI-6. not a Rs or Ll.. The last one i had was the newer style 6440 box. IDK how harsh the 2 step was on the engine as i did not get to go to the track with it and make many passes. I did bounce it off multiple times and do street launches. It cut very fast but did not seem to hard (if that makes scence).