Consistency Tune ?
Consistency Tune ? I have a tune/consistency question. My car is setup OLSD, my enrichment vs IAT table is zeroed. The car has been picking up about .02/.03 when sun goes down and air starts cooling. Would adding fuel in the lower enrichment vs IAT table help with consistency? My thought is the car leans out some in cooler air and speeds up so richening it back up in those areas would offset this . I am looking for consistency over ET. Does anyone do this or tried this? I know this is a tune question but I am looking at this from a racers perspective.
I've considered anything within .05 consistent but it all depends on how competitive your class is or if you're running an index. If you're bracket racing and know you're going to pick up .02-.03 when the sun goes down I'd just dial accordingly. Probably better off to just keep a good log book and check the da before you run.
Two weeks ago lost in semis, I was .007 11.651 on 11.66 dial to a .010 13.87 on 13.85. This past week round 2 I was .018 11.857 on 11.88 dial lost to .020 10.12 on 10.11. So you can be judge on competitive. I use Performaire Eclipse to log everything. I am just thinking instead of letting car speed up when it gets cool why not slow it back down with more fuel? Just curious if anyone has tried this. Maybe it won't work .It is hard for me to try this at a test and tune because we race every Saturday.
Yeah I'm seeing there's not a lot of room for error there. I've heard of people looping a wire in the iat plug and it will output a constant temp, I don't know if that would cause more harm than good though. I don't know if you can pull it off or not. Sounds like something that's going to take some t&t time.
Yeah I'm seeing there's not a lot of room for error there. I've heard of people looping a wire in the iat plug and it will output a constant temp, I don't know if that would cause more harm than good though. I don't know if you can pull it off or not. Sounds like something that's going to take some t&t time.
Anyone do this?
Two weeks ago lost in semis, I was .007 11.651 on 11.66 dial to a .010 13.87 on 13.85. This past week round 2 I was .018 11.857 on 11.88 dial lost to .020 10.12 on 10.11. So you can be judge on competitive. I use Performaire Eclipse to log everything. I am just thinking instead of letting car speed up when it gets cool why not slow it back down with more fuel? Just curious if anyone has tried this. Maybe it won't work .It is hard for me to try this at a test and tune because we race every Saturday.
My car can move alot from TT's to Elims. 2 weeks ago I start the day with a 6.6001(2:30 pm) in the finals (10:30 pm) I was 6.50 with a 2 on a 6.51 dial. Car would have run a high 6.48 to a very low 6.49.
Coach
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Adding fuel could work, it might also be worthwhile to consider taking out a degree of timing at a certain temperature, map value, or above an airflow limit that you only get into when the temps come down.
I will say though, it is going to be difficult to make it more consistent than it already is. My last drag car would swing 4 times that much going into the evening. Adding 1% fuel or taking away 1° timing might make it swing .002 the other direction.
I will say though, it is going to be difficult to make it more consistent than it already is. My last drag car would swing 4 times that much going into the evening. Adding 1% fuel or taking away 1° timing might make it swing .002 the other direction.
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Just cause the car "thinks" it is the same temp doesn't mean it still won't speed up when the actual temp cools down. If it somehow did keep it from speeding up when it cooled off it would be from running too lean, you don't want that.
Al
