Brad here is my Megasquirt Info |
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Brad here is my Megasquirt Info |
DNHunt |
Apr 21 2003, 09:51 PM
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#1
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Here is a link to a web page on my install. Dave's 914 Megasquirt Conversion. I've been trying to get info that may help others up on it. I feel that the values listed in the tables will get most 2.0 L type IV's running. All, including, mine will need more tuning.
I've had it running for about a month on the MS and I'm gaining confidence in it. Went to the breakfast in Seattle on Saturday and it ran well albeit kinda rich. The enrichment for air density as the intake air temperature rises is still not right so it is too lean right after warmup enrichment but too rich when fully warm. When I get that figured out I should be able to lean it out more. Still, I travelled about 80 miles without a missfire. Some of the guys that drove it and might want to chime in. Dave |
DNHunt |
Apr 22 2003, 06:47 AM
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#2
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Geoff;
I know the car is running rich. The plugs look it, and the exhaust is way sooty. My concern with quoting Air fuel ratios right now is that the O2 sensor has never been calibrated so I would say it runs rich at part load and richer at WOT. I've chased all the bugs except for the fact that the Air fuel mixture richens excessively as the temperature rises. I chose to run it rich at full warmup so it would not be lean as it is getting there. My plan is to tweak the air density corrections by fooling the ECU into thinking that the intake air sensor changes more slowly, then retune the fueling map to run leaner at full warm. When that is done I'd like to drive it for a while then get a dyno done and post the results (Enrichments, VE table, Constants, Code, .inc files). Timing all of this depends on how long it takes to solve this and the usual demands from family and wife. Don't want to hear "You love that car so much why don't you sleep with it." Brad; Have you looked at an ignition called MegaSpark. It is programmable and uses Megasquirt electronics to fire an MSD 6A. Looks easy but no knock sensing or ion sensing. I'm thinking that may make a good project for me next winter. I felt the MSD ingnition did more to improve the way the car ran than the Megasquirt. It instantly provided more torque and smoother idle. Dave |
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