cable edelbrock 90mm tuning PITA
06-16-2011, 09:13 PM
#34
Couple things I noticed...
-Why is the idle MAP so high? Thats a pretty standard cam but your idle MAP is around 70mpa, even on a hard decel its still only 50-60...
-I think mike is right on about the burst knock retard. Every time you give a sudden throttle increase you are going to negative advance. Also check the abuse mode torque management settings for this.
- A wideband would be tremendously helpful. Initially I thought you problem was too much fuel, but you seem to think its not enough. A wideband would tell us in a heartbeat.
-Why is the idle MAP so high? Thats a pretty standard cam but your idle MAP is around 70mpa, even on a hard decel its still only 50-60...
-I think mike is right on about the burst knock retard. Every time you give a sudden throttle increase you are going to negative advance. Also check the abuse mode torque management settings for this.
- A wideband would be tremendously helpful. Initially I thought you problem was too much fuel, but you seem to think its not enough. A wideband would tell us in a heartbeat.
06-17-2011, 04:54 AM
#35
I'm driving it today so I will log burst kr.
I agree a wide band would be great but I don't have much of a choice, I told him I can't tune it perfectly until I have a wideband. I'm not sure why the map is so high. It's a pat g lobe cam. It's got a decent lope but not crazy but it's there. Maybe the map sensor is leaking? It's the manifold style map sensor stuffed in the new model mani.
I agree a wide band would be great but I don't have much of a choice, I told him I can't tune it perfectly until I have a wideband. I'm not sure why the map is so high. It's a pat g lobe cam. It's got a decent lope but not crazy but it's there. Maybe the map sensor is leaking? It's the manifold style map sensor stuffed in the new model mani.
06-17-2011, 04:06 PM
#36
Ok I believe it was burst knock and not enough timing and too much fuel. But it ask for more fuel due to inclompete burn. So I gave it about 12* of timing and raised the burst knock thresh hold. That took alot out. Then it finally told me my trims were way fat so I trimmed it back out and bam ten times better. It's still not perfect but it doesn't bog. It needs a stall and it will hual. It jumps off the line hard but soon falls on it's face compared to top end. But even then it's no near enough fuel so I can't go wot all the way up
06-17-2011, 04:08 PM
#37
Ok I believe it was burst knock and not enough timing and too much fuel. But it ask for more fuel due to inclompete burn. So I gave it about 12* of timing and raised the burst knock thresh hold. That took alot out. Then it finally told me my trims were way fat so I trimmed it back out and bam ten times better. It's still not perfect but it doesn't bog. It needs a stall and it will hual. It jumps off the line hard but soon falls on it's face compared to top end. But even then it's no near enough fuel so I can't go wot all the way up and I cranked up the idle Timing to about 28 and it now idles right around 55kpa.
06-17-2011, 06:17 PM
#40
Well every other cam I did just loped so hard it threw the code. So I fixed that first. Plus it had the code at idle so I adjusted it. I didn't think about idle cells being same as low low rpm drive cells. It's much peppier with the raised timing. I had lowered the timing because I was getting kr everytime I touched the gas. I guess it was misfiring and showing as kr. Now to have him get injectors and hopfully a wideband and get wot straightened out.