stinkfist

Has anyone dynoed this system? I'm interested in setting up our race car ignition like this but would like to see what it will do first. I have the direct fire set up using the MSD on my street car but I'm not impressed enough with it to do it to the race car.

Mike

Jeff20B

iTrader: (13)

AZ85RX7, what specific questions do you have?

REVHED is correct about the little connectors. They are the really super small quick disconnects that fit on the pins in the back of the ignitors. Two for each ignitor. I got mine from an car sound store. I don't recall seeing any of that size at radio shack.

I just reset my timing to 20*L BTDC and double checked the Trailing split and set it to 10* behind Leading (the darn thing had been sitting for 10 years before I installed it and the diaphrams caused a less than accurate setting. Now it's working ok), except I'm getting a strange missfire now. It started when I put the timing light on my Trailing wires (if you've read my poor man's page you'll see that I got a similar problem when I first experimented with PMDFIS in parallel mode - it started missing when I hooked up the timing light... the piece of junk! Oh well, it's the only one I have... for now.).

I also un dead-headed my fuel pump and it runs better now, but the carb runs itself out of gas again. Gotta replace the Facet pump with something better that can supply the needed PSI and volume.

I haven't dynoed this system yet, but the MSD sucked big time when compared in regular street driving and acceleration.

Montrealer

If you really want to do it, just read and re-read the document, then take a lice long look at your engine bay and the wireing diagram be patient and take your time the important info is all there ya just got to get the big picture.

Montrealer

Ok so according to my *** dyno I did not feel a great difference (note that there were several days between the test drive and a previous ride.)

But in a comparison test with an other car that was previously equal in acceleration, I was able to pull away.

Better engine startup I agree.

Better emission, for some reason when i put the trailing wire on the leading part of the distributor cap, a spark jumps from the + and the - on the coil and they extend under the boot of the wire.
Perhaps I did not properly cover the + side of the coil?
But i have no problem running it on its original location. Point beeing that the car seems to stink a bite more than it used to.

Other than that it was quite simple to wire and was worth the time.

Jeff20B

iTrader: (13)

Are your emissions better? Your last post was a little confusing. I ask only because I cleaned up my emissions a little today.

REVHED

This may be a stupid question but did you move ALL the trailing ignition leads to the leading posts on the dizzy cap. Let's say you had the coil to cap lead on the leading post and left one or both of the cap to spark plug leads on the trailing posts or visa versa. This would cause arcing at the coil like you described because there is nowhere else for the spark to go. There is really no reason it shouldn't work if everything is hooked up right.

Montrealer

Jeff 20B
it should have read emission... or ?
I meant to say emisssions seem to be worst, but I do belive that its because of this arcing problem.


REVHED

Thanks I'm such an IDIOT, I guess it is quite self explanatory.

I guess I did not fully think it out before I got started, Im giving people advice and not even following it myself

But one thing is for sure, if you get started and doo most of the work, little bugs can be sorted out on the way just like I did.

BTW did i say im an IDIOT?

AZ85RX7

Jeff20B: Well, my main question is....where do I start? Maybe someone in AZ (az_lynx) can help me with it.

Blake

Well, the ones on the Animation CD are looped. Plus, most of the animated GIFs are available in a higher quality QuickTime version. Only $6.95.

LOL! You think you had it tough?!? I not only had to visualize how the **** worked, but had to also figure out how to animate it realistically. It only took a *year* to perfect!

Later,
--
Blake Qualley
Rotary Engine Illustrated

Jeff20B

iTrader: (13)

Dude Blake, I just sent you an email right before I came here tonight! What a trip. Great minds think alike I suppose.

Well, since I got your attention, would you possibly be able to animate a 20B with all the plugs firing the way Mazda's ECU controls them (dual Leading sparks)?

I think we can all visualize single Leading sparks, but how about dual? You feel up to it?

The email contains some info you might need.

AZ85RX7,
Where do you start? How far along are you already? Your car is an '85 right? All you need is some of the materials listed in my article. Then put your mechanical and electrical skills to the test. Set it up kinda like REVHED did, but you also need to leave enough space for things like AC and the brake master cylinder and stuff (like all US LHD cars).