Rebuild all the salvage Miatas! ASS!
#2842
SADFab Destructive Testing Engineer
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Just found something digging through the logs again. MAT based spark retard was turned on.
Right around 5600 MAT starts to climb, and timing retards. It was retarding about 4*.
Well ****. Ed you are gonna make more power when it is cool.
Right around 5600 MAT starts to climb, and timing retards. It was retarding about 4*.
Well ****. Ed you are gonna make more power when it is cool.
#2844
SADFab Destructive Testing Engineer
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Cold advance was also on.
Our 234kpa pull timing was 3-4* at full boost. Should have been 7-9*. 210kpa was 8ish instead of 12ish.
Sounds like were going to put on the squaretop and get back to the dyno. Some better det cans. And timing that we actually know is right.
Oh well, live and learn. We got fuel dialed in.
What is interesting is I didn't touch those settings from the old tune. I guess it wasn't hot enough last time to kick in.
What should MAT retard be set to? Just something else to tune?
Our 234kpa pull timing was 3-4* at full boost. Should have been 7-9*. 210kpa was 8ish instead of 12ish.
Sounds like were going to put on the squaretop and get back to the dyno. Some better det cans. And timing that we actually know is right.
Oh well, live and learn. We got fuel dialed in.
What is interesting is I didn't touch those settings from the old tune. I guess it wasn't hot enough last time to kick in.
What should MAT retard be set to? Just something else to tune?
#2846
SADFab Destructive Testing Engineer
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Join Date: Apr 2014
Location: Beaverton, USA
Posts: 18,642
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I'm not sure. We were approaching the end of the 2 hours. And didn't want to pay for another. I clicked on base timing in the log instead of spark advance I think. FWIW this was my first time tuning spark....ever lolol.
This base map table is stupid retarded.
I like the -1 for every 10* over 140. We never got to 140 on the dyno. Only like 138.
This base map table is stupid retarded.
I like the -1 for every 10* over 140. We never got to 140 on the dyno. Only like 138.
#2858
Cpt. Slow
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If you tuned spark by going down until loss is measured, and then up a bit back, I don't think the mat based retard would effect overall power. If you're hoping for 350, less than 4 degrees difference probably wouldn't account for 50hp. I think I remember seeing about a 10hp loss for 2 degrees, so you might get back to the original 315 we saw back in October, maybe 320-325, but not 350.