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126 Posts
Does anyone know if there is a DIS ignition (aftermarket) that will work on a 5MGE? Just trying to figure out some upgrades for my baby Maybe a 7MGTE igniton will work with some mods
DIS ignition on 5MGE
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8,745 Posts
Switch to a complete aftermarket ignition setup w/ crank trigger or better yet an entire standalone EFI system. The 5M computer is setup w/ a single coil. Considering nobody makes any upgrades for the 5M computer, I'm not exactly sure how you would ever change that.
i remember reading a post earlier by ray fong (i think?) mentioning that the 7m CPS or n/a distributor will fit in our head if the drive gear is swapped. maybe he can chime in about this.
i think there's a good chance the CPS will work with the 5m computer. the CPS has the same # teeth for the speed signal's wheel, and the same # for the cam position wheel. the only difference is that the CPS uses 2 cam position sensors, whereas the 5m will only need one. also the CPS' pickups are probably a bit more sensitive, but that shouldnt be a problem. one of the CPS' position sensors should correlate to the same piston #1 position as the one in the 5m distributor does.
if you do that, you might be able to get a 7mgte computer, power it up and hook the CPS up to it as well to get it to send the logic signals to the 7mgte ignitor. you might have to mess with a few things to convince it that the motor is running so it actually sends those signals out.
so, you'd have the 7mgte ecu hooked up to the logic signal inputs of the 7mgte ignitor, but the primary coil signal for the 7mgte ignitor would be hooked up to the 5m ecu. you might have to tap the ignition confirmation signal from the 7mgte ignitor to both ECUs to keep them willing to run the engine.
this way, there's a chance you could use the 7m's coil pack system with the 5m computer still controlling timing...
shiva
i think there's a good chance the CPS will work with the 5m computer. the CPS has the same # teeth for the speed signal's wheel, and the same # for the cam position wheel. the only difference is that the CPS uses 2 cam position sensors, whereas the 5m will only need one. also the CPS' pickups are probably a bit more sensitive, but that shouldnt be a problem. one of the CPS' position sensors should correlate to the same piston #1 position as the one in the 5m distributor does.
if you do that, you might be able to get a 7mgte computer, power it up and hook the CPS up to it as well to get it to send the logic signals to the 7mgte ignitor. you might have to mess with a few things to convince it that the motor is running so it actually sends those signals out.
so, you'd have the 7mgte ecu hooked up to the logic signal inputs of the 7mgte ignitor, but the primary coil signal for the 7mgte ignitor would be hooked up to the 5m ecu. you might have to tap the ignition confirmation signal from the 7mgte ignitor to both ECUs to keep them willing to run the engine.
this way, there's a chance you could use the 7m's coil pack system with the 5m computer still controlling timing...
shiva
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2,201 Posts
this is just me, but ive heard that it doesnt matter how much voltage and what not u have going to the plugs, as long as its enough voltage to spark, cuz when u think about it, once it sparks the gas, the gas does the rest of the job by burning itself. i heard DIS doesnt have any advantage over any other system, but hey, if u want a more modern car go for it
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525 Posts
Well....
Jacobs offers an ignition I wanted to get a group buy about 2 years ago and like 2-3 people went in on it. I have a brand new Jacobs in my basement. Let me try to dig up some info on it for you.
There is more info in there but its way back in 2001 I had to search through on the yahoo groups.
Here is the link for you.
http://autos.groups.yahoo.com/group/mk2/message/61570
This is what I wrote at the time:
There is a new poll up for the Jacobs Ignition ICE Pak for our MKII.
I have been told we can expect at least these gains;
-8% gain in horsepower
-10% gain in torque
-16% better mileage
-Quicker starts (hot or cold)
-Smoother engine operation & idle
-Eliminates bogs, hesitation, and erratic idle
-Maximum spark to get up to 99% fuel burn
-Reduce spark plug and electrode wear
-It will plug directly in without wiring or splicing. The complete
system normally runs $474. There is a 30-day trial period to try it
out if not satisfied they will refund the purchase price less 10%.
The 325 is good right now but I have been told that more people will
equal a deeper discount please vote seriously I am getting one but if
we can all save money lets do it.
Jacobs offers an ignition I wanted to get a group buy about 2 years ago and like 2-3 people went in on it. I have a brand new Jacobs in my basement. Let me try to dig up some info on it for you.
There is more info in there but its way back in 2001 I had to search through on the yahoo groups.
Here is the link for you.
http://autos.groups.yahoo.com/group/mk2/message/61570
This is what I wrote at the time:
There is a new poll up for the Jacobs Ignition ICE Pak for our MKII.
I have been told we can expect at least these gains;
-8% gain in horsepower
-10% gain in torque
-16% better mileage
-Quicker starts (hot or cold)
-Smoother engine operation & idle
-Eliminates bogs, hesitation, and erratic idle
-Maximum spark to get up to 99% fuel burn
-Reduce spark plug and electrode wear
-It will plug directly in without wiring or splicing. The complete
system normally runs $474. There is a 30-day trial period to try it
out if not satisfied they will refund the purchase price less 10%.
The 325 is good right now but I have been told that more people will
equal a deeper discount please vote seriously I am getting one but if
we can all save money lets do it.
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3,026 Posts
i have an msd thats much more powerful than stock, my friend found that out first hand but i couldn't get it to work, i'm going to take the tack adapter back to get tested and maybe have the shop install it. stronger ignition realy helps. if you geta good setup you can put a 2 switch rev limiter so that you can fine tune your launches too.
This has been discussed a lot. The stock ignition in good operating condition hasn't been improved upon by aftermarket ignition systems for NA setups. Maybe there's improvement under hi boost pressure for GT peeps. If you read the MSD instructions (online), they say that u only get one spark above about 2000 RPM since rotor doesn't contact distributor cap contact long enough (MSD stands for multiple spark discharge). What a joke.
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759 Posts
I have 6A MSD ignition and it hasn't failed on me . . . yet. I've talked to a person that took a long trip and it failed in the heat of the desert. :?StanS said:
But the car I had was driven 20 hours straight (back from FL to TX) and it never skipped or failed at all. hmmm it might depend on the setup? Or I just got lucky.
I hear they heat soke like crazy . . . maybe if you have it located in a cooler place than the stock ignition area it might be better.Keith
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298 Posts
My 6a is mounted in the back of the car to avoid heat soak - I have the tach adapter in the front with no problems. I don't know if the 6a has helped or not as the 5m still uses a dizzy. In my rx7 I used a two box three coil system to bypass the dizzy and have a direct fire with wasted spark. This makes a real difference so its disappointing to see no-one has done this with a mk2.
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13,051 Posts
There was an electromotive 3-coil waste-spark standalone ignition system on ebay a while back.... I think they wanted like $600 for it. Nice thing was that it removed the dizzy all together, had a crank wheel and sensor setup instead.
The only thing I dont much like about it is its lack of multiple rpm adjustments, although I guess you only need a linear line from 0-3k, and 3k+ rpms...
--BillyM
The only thing I dont much like about it is its lack of multiple rpm adjustments, although I guess you only need a linear line from 0-3k, and 3k+ rpms...
--BillyM
I wasn't implying that the MSD was going to fail. I said that MSD wouldn't give any performance improvement over a stock ignition operating up to snuff on an na setup. I've read this in many places. If u get improvement then u have a problem with your stock ignition system which should be fixed. Doing a mod to fix a failed, or worse failing, system isn't the way to go. Everything stock pertaining to a mod should be operating correctly before u do the mod. Get MSD and waste your money if u want to.
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