I installed my cams with the old GSC single springs non-beehive. Nothing else was changed. I finished up my WOT tune the same day. The next day I was driving to work and the CEL would flash everytime I would start to accelerate in traffic. I pulled and added timing, added race gas and it would still knock. Adjusted the knock filters and all was well.

 

Great thread 211ratsbud. I am essentially in a similar situation, so I am eager about this topic. I have a Maprev3 IM and Kelford 272 and still trying to tune properly. I have more knock down low than I ever did. I did upgrade the springs for the cams though. I am starting to wonder if the knock is real knock too. Previously I had a nearly 0 knock tune.

I am the guy from the other thread on your 02 sensor issue. Just make sure you log the voltage from that sensor, and make sure its not jumping around irratically. If the grounding is failing or intermitent on that sensor it could be sending bad voltage data for certain conditions. My car ran crazy rich when that wire failed on me, but it didn't happen at once. It happened slowly and took me a long time to figure it out, because it was intermittent.

In another post I also tried super retarded timing during spool, and then advanced, and neither had a material impact. I know I am too rich, even with Lean Spool on, so I am redoing my AFR map.

How many of you guys are on 91 octane?

 

I autocross my car so I can give an actual opinion 272 cams on stock turbo. The AMS cam comparison is outdated and for the Evo 8, not the Evo 9 like the OP drives. The cams will not create lag.

 

ratsbudd, post a log with about 2 or 3 pulls logging knock sum, knock voltage, timing, RPMs, TPS, AFR and injector duty cycle. Also could you post a picture of your high and low ignition map? If you don't want to do that in public, send me your rom and I can shoot you some advice.

 

Yup gonna go put the new plugs in a few mins

Scratch that they didn't get the plugs in today

 

Ok, I havent made any logs because my failed o2 circuit has been causing crappy AFR at light throttle; so I aimed to fix that today. I made a little progress and tomorrow I will know for sure if I can get it fixed. Once I do, I will revisit this thread.

Also, i switched back to full time open loop and saw no knocksum while under light throttle. So I believe there is a correlation based on my OL getting proper AFR sooner or something.

Theres a lot of variables and on top of this all my car started overheating randomly today with a ful size KOYO radiator and a top of the line shrouded fan!

Two things:

if m o2 sensor wire gets fixed, I am going to go back to MAF, and switch to an 8858 ADM rom which will allow me to fulfill my journey in the SAS having fun thread.

And I will accomplish the MAF tune to scale my injectors once and for all. Which can be reapplied to my SD tune if I end up needing that.

 

Just leave it in Open Loop. Im now running mid 15s at cruise And AFR does not swing as much during cruise as it used to when running closed loop. If I go much longer like this and feel like I can get away with it, I may pull the o2 sensor this winter during the top end rebuild/minor wire tuck.

 

I would prefer to have closed loop operation myself. I don't have the time to adjust all the common areas of the ve map. I want to sell the car soon.. Which may happen sooner once my wife has our baby this winter. I'd like to buy a cleaner evo in the future this thing has all sorts of problems that are rather discouraging, not tune related either

 

I really havent spent that much time tuning it. I drive the car 60 miles every day. And its been OL for the last few months. If I notice it seems to be running rich or lean at a specific area, I'll hold it there and log for a few seconds. Then I end up having a handful of logs that are rpm/kpa specific and make appropriate changes. Im really happy with it. I may turn CL back on just to see the difference, but it runs so well Im not sure I want to.

OT...new babies seem to be the common theme around here these days. Or maybe Im just now paying attention. I guess its really not a coincidence when you look at the avg evo owner's age. 5 weeks to go for me and counting every second of it. The evo is the one project that Im keeping. The other projects are all for sale though..lol. Besides, I think he wiggles alot when my wife rides in my car because he loves it. Congrats by the way.

 

Just curious, what method did you use to force full time open loop?

 

Open Loop Load table.

 

I've extended my open loop out to 120 load workin decent so far. I feel I'm pretty rich in some areas of light throttle that are getting knock or rich misfires interpreted as knock.

 

Ive got two of those. Do you know what the difference is and how the percentage value works?

 

I Always make them the same. Would be nice if we knew under what conditions the two were used though.

I have been making them slowly go out farther and farther for little crisper running machine .

Make the both load tables 0 or both tps tables 0 for full time ol

 

What are folks logging to confirm OL? Is it actually the O2 Feedback? As I mess around with these tables I just want to make sure I am impacting what I think I am.