Desperate for some Help With Microsquirt, Beyond Frustrated |
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Desperate for some Help With Microsquirt, Beyond Frustrated |
Mblizzard |
Aug 25 2017, 04:54 PM
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#1
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
I have been trying to get my conversion done in time for Okteenerfest. I have run up against a brick wall and just cant seem to figure out what i am doing wrong.
If anyone can help me by looking at my tune files or providing insight it will be very much appreciated. I can get th car to idle but nothing beyond that. Any use of the throttle is less than impressive and almost useless. Meaning it bogs down and does not accelerate at all. I have no clue what i am missing. 2056 with new low impeadance injectors. Bosch Wideband O2 sensor. Really need some suggestions. Not sure if i can post the tune files here. But will try. |
jpnovak |
Sep 12 2017, 11:36 AM
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#2
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They call me "Nanoman" Group: Members Posts: 231 Joined: 26-August 09 From: Austin TX Member No.: 10,736 Region Association: Southwest Region |
Your post is contradictory. In one line you are changing timing to help CHT. In the next section you are fuel-only and not controlling timing.
If you are running timing through the distributor then changes to the timing curve will not make any difference to your tune. They are just parameters that go nowhere and have no function. If you want to run with a more lean AFR (lean burn) you generally have to advance the timing to match. This is usually done on low throttle cruise bins. However, if you are not controlling timing then you are at the mercy of the timing generated by your dizzy curve. Glad that the car is running well. Continue to tune. During the trip you can change the target AFR, adjust the fuel trim and find the balance of power, fuel mileage and CHT. |
Mblizzard |
Sep 12 2017, 11:49 AM
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#3
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Your post is contradictory. In one line you are changing timing to help CHT. In the next section you are fuel-only and not controlling timing. If you are running timing through the distributor then changes to the timing curve will not make any difference to your tune. They are just parameters that go nowhere and have no function. If you want to run with a more lean AFR (lean burn) you generally have to advance the timing to match. This is usually done on low throttle cruise bins. However, if you are not controlling timing then you are at the mercy of the timing generated by your dizzy curve. Glad that the car is running well. Continue to tune. During the trip you can change the target AFR, adjust the fuel trim and find the balance of power, fuel mileage and CHT. I am not controlling time with the Microsquirt. I definitely could be wrong but I understood that the when using the tooth wheel set up you can select use table for timing. I don't know if this table impacts the firing of the injectors. I think it would not be related as you suggest but just wanted to confirm I was not missing something. |
jd74914 |
Sep 12 2017, 12:18 PM
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#4
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
I am not controlling time with the Microsquirt. I definitely could be wrong but I understood that the when using the tooth wheel set up you can select use table for timing. I don't know if this table impacts the firing of the injectors. I think it would not be related as you suggest but just wanted to confirm I was not missing something. There should be a fuel injection timing table which controls either the start or end of the injection cycle. What is yours set at? In my experience, injection timing doesn't really have a huge effect on overall engine performance unless it is wayyyyy off and all you're doing is pooling in the manifold. It can subtly change throttle response, making transients a bit better, and also has a slight effect on torque, but I've only seen that on an engine dyno after many hours of tuning. Your AFR can also be a little weird if its way off and you're sending gas right out the exhaust port as IV/EV timing overlaps. Again, this is pretty subtle, nothing like the changes even a few degrees of ignition timing might make. |
Mblizzard |
Sep 12 2017, 12:34 PM
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#5
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
I am not controlling time with the Microsquirt. I definitely could be wrong but I understood that the when using the tooth wheel set up you can select use table for timing. I don't know if this table impacts the firing of the injectors. I think it would not be related as you suggest but just wanted to confirm I was not missing something. There should be a fuel injection timing table which controls either the start or end of the injection cycle. What is yours set at? In my experience, injection timing doesn't really have a huge effect on overall engine performance unless it is wayyyyy off and all you're doing is pooling in the manifold. It can subtly change throttle response, making transients a bit better, and also has a slight effect on torque, but I've only seen that on an engine dyno after many hours of tuning. Your AFR can also be a little weird if its way off and you're sending gas right out the exhaust port as IV/EV timing overlaps. Again, this is pretty subtle, nothing like the changes even a few degrees of ignition timing might make. This is what I have for my timing settings. This is base don information from McMark. So I am assuming the ECU knows when TDC occurs and fires the injector based on that. Is there another setting for the injector timing? |
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