Megasquirt on my wagon.
mrhalfwitt
Band Wagon
I started another thread asking questions about boosting my zc. http://www.hondacivicwagon.com/bb/viewtopic.php?f=7&t=7622&p=83491&hilit=megasquirt#p83491
That was a while ago, since than i did over the road truck driving and just didn't have the time to play with my car. I'm back home to stay now and it's game time. I used megasquirt on many other cars so I feel comfortable using it.
Some of you who would like to use it but have no idea where to start this is a good place to do some research, scroll 1/4 of the way down the page http://buddyabaddon.spaces.live.com/default.aspx?wa=wsignin1.0&sa=48637815
For more look here http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_honda_acura.htm
The first link tells you the most important information, the pinouts on the factory harness and how to hook it up to the megasquirt as a plug and play without hacking up your factory harness.
There are many ways you can use megasquirt to control the ignition (the spark) The first link tells you how to make it work with the stock distributor.
There is other information out there that uses the ford EDIS (Electronic distributor ignition system). The only thing I dont like about this is if you try to use a rev limiter via spark cut the edis module defalts to 10* and never cuts spark. You need to use a fuel cut. With boost this is very bad especially if your using a two stage rev limiter.
So I decided to use megasquirt to directly drive a coil pack. It's the same pack found on a dodge neon or a ford escort. I use it in wasted spark mode and I have limitless control over my ignition timing and spark cut. That information can be found here http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_ford_zetec.htm
For my hardware i'm using a standard megasquirt 2 chip on the V.3.0 PCB moded with two coil drivers from diyautotune.com. As for the crank pickup i'm using a 36-1 wheel from a 1996 mustang v6 and a vr sensor from a 1995 ford taurus. And a coil pack from a 1999 escort zr2 with the ztec motor.
My wideband O2 setup is from 14point7.com The one I'm using has been discontinued. They now sell the same one but with a case.
That was a while ago, since than i did over the road truck driving and just didn't have the time to play with my car. I'm back home to stay now and it's game time. I used megasquirt on many other cars so I feel comfortable using it.
Some of you who would like to use it but have no idea where to start this is a good place to do some research, scroll 1/4 of the way down the page http://buddyabaddon.spaces.live.com/default.aspx?wa=wsignin1.0&sa=48637815
For more look here http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_honda_acura.htm
The first link tells you the most important information, the pinouts on the factory harness and how to hook it up to the megasquirt as a plug and play without hacking up your factory harness.
There are many ways you can use megasquirt to control the ignition (the spark) The first link tells you how to make it work with the stock distributor.
There is other information out there that uses the ford EDIS (Electronic distributor ignition system). The only thing I dont like about this is if you try to use a rev limiter via spark cut the edis module defalts to 10* and never cuts spark. You need to use a fuel cut. With boost this is very bad especially if your using a two stage rev limiter.
So I decided to use megasquirt to directly drive a coil pack. It's the same pack found on a dodge neon or a ford escort. I use it in wasted spark mode and I have limitless control over my ignition timing and spark cut. That information can be found here http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_ford_zetec.htm
For my hardware i'm using a standard megasquirt 2 chip on the V.3.0 PCB moded with two coil drivers from diyautotune.com. As for the crank pickup i'm using a 36-1 wheel from a 1996 mustang v6 and a vr sensor from a 1995 ford taurus. And a coil pack from a 1999 escort zr2 with the ztec motor.
My wideband O2 setup is from 14point7.com The one I'm using has been discontinued. They now sell the same one but with a case.
Comments
I will be using Megasquirt on my Nissan. I take it you haven't boosted it yet? Do you have a good base map for the DOHC ZC? I would be interested in running Megasquirt on my wagon as well to help in the tuning on my supercharged ZC.
here is what i used. This is for a n/a stock setup. Both tables will have to be dramatically changed to register boost. 100kpa is atmospheric pressure at wot (wide open throttle) from this point on you will have to give higher values so megasquirt can be used in boost.
By using this chart you can see that the stock 2.5 bar map sensor that comes in the megasquirt will do just fine.
Psi to bar chart
psi bar psi bar
1 0.068947573 26 1.792636895
2 0.137895146 27 1.861584468
3 0.206842719 28 1.930532041
4 0.275790292 29 1.999479614
5 0.344737865 30 2.068427187
6 0.413685437 31 2.13737476
7 0.48263301 32 2.206322333
8 0.551580583 33 2.275269906
9 0.620528156 34 2.344217479
10 0.689475729 35 2.413165052
11 0.758423302 36 2.482112624
12 0.827370875 37 2.551060197
kpa to psi chart
kilopascal psi kilopascal psi kilopascal psi kilopascal psi
1 0.145037738 26 3.770981188 51 7.396924638 76 11.02286809
2 0.290075476 27 3.916018926 52 7.541962376 77 11.16790583
3 0.435113214 28 4.061056664 53 7.687000114 78 11.31294356
4 0.580150952 29 4.206094402 54 7.832037852 79 11.4579813
5 0.72518869 30 4.35113214 55 7.97707559 80 11.60301904
6 0.870226428 31 4.496169878 56 8.122113328 81 11.74805678
7 1.015264166 32 4.641207616 57 8.267151066 82 11.89309452
8 1.160301904 33 4.786245354 58 8.412188804 83 12.03813225
9 1.305339642 34 4.931283092 59 8.557226542 84 12.18316999
10 1.45037738 35 5.07632083 60 8.70226428 85 12.32820773
11 1.595415118 36 5.221358568 61 8.847302018 86 12.47324547
12 1.740452856 37 5.366396306 62 8.992339756 87 12.61828321
13 1.885490594 38 5.511434044 63 9.137377494 88 12.76332094
14 2.030528332 39 5.656471782 64 9.282415232 89 12.90835868
15 2.17556607 40 5.80150952 65 9.42745297 90 13.05339642
16 2.320603808 41 5.946547258 66 9.572490708 100 14.5037738
17 2.465641546 42 6.091584996 67 9.717528446 125 18.12971725
18 2.610679284 43 6.236622734 68 9.862566184 150 21.7556607
19 2.755717022 44 6.381660472 69 10.00760392 175 25.38160415
20 2.90075476 45 6.52669821 70 10.15264166 200 29.0075476
21 3.045792498 46 6.671735948 71 10.2976794 250 36.2594345
22 3.190830236 47 6.816773686 72 10.44271714 300 43.5113214
23 3.335867974 48 6.961811424 73 10.58775487 500 72.518869
24 3.480905712 49 7.106849162 74 10.73279261 750 108.7783035
25 3.62594345 50 7.2518869 75 10.87783035 1000 145.037738
Also i forgot to add that in megasquirt world 0 psi is 100kpa. in our world 0 kpa is 0 psi. so you will add positive pressure (boost) on to 100, this is why i gave 250 kpa as an example, 20 psi is 150 kpa, but to make the megasquirt understand that you have to add the first 100. I hope that makes sense.