Couple questions. Finally have cams idling and stable. So far so good. Choppy but JUN 272's are not a small cam. I'm at 950 RPM at the moment. May need to bump it up a tad more. Been playing with MIVEC settings to try to get a better idle so only playing with load sites under 1500 RPM and load values of 70 and under (idle with the low vacuum these cams have is about 30 load average at idle of 950 RPM). Now I am logging with EVOscan mode 23 and it shoes the ex cam timing to be 0 despite me having -20 in the map (Mivec #1). Also when I press throttle the log does show the VVTi retarding the exhaust cam. The intake cam log I assume doesn't work yet on mode 23? It seems to just copy whatever the ex cam is doing.

Lastly when I log AFR map is that the target AFR the ECU is looking for? It just says 14.7 all the time so I would assume so. Any way to look into changing those target value? Tephra? I know big cams like a bit richer idle than 14.7 for best results.

 

AFRMap is the target. You can change it by lowering the open loop load values low enough that they trigger at idle, but then you won't be adjusting in closed loop.

Did you adjust both MIVEC maps (warmup and regular) or just one? You might still be on the warmup map (not sure what year you are, they switched naming conventions), or you could be out of bounds for the mechanical / software limit on the cam.

 

I'll try -10 at idle and see if that will work. I was just trying to find a sweet spot. If I lower the open loop values will it just be in open loop all the time or can I do that at only certain RPM points? I also don't see those tables here on my map at all. I don't even have the MAF scaling maps at all either. I have early model GSR 08 so I know it's pretty much the first ECU's made for the X. As for MIVEC maps I only have 2. One for I would assume low load and one for high or are these temp related maps?

 

Yep I guess the two MIVEC maps are temp related. Idle still choppy at 950 RPM but stable as a rock and never stalls anymore. Just getting car running for now. It's a monster at only 22 PSI on this GT3582R HTA. Have to make a big MAF housing and get my injectors in so I can get it on the dyno. The car did NOT like blow through setup at all. I am making 3.5 inch MAF housing and necking down the 4 inch inlet a bit so as to keep resolution. That should be plenty of room for this turbo even on race gas.

 

Ok so how do I richen up mixture it idle. Fuel trims look great at part throttle but at idle they go to +15 no matter what I do to high octane fuel map in those load/rpm sites

 

You run in Closed loop during idle.. hence why your trims are being used.

You need to adjust your injector latencies and your injector scalers. For this, you probably need to move the latencies down and the scaler up.

 

Even for stock injectors and stock maf housing? Oddly had to decrease injector dice value to 500 to get it to this point

 

op post up some screenshots + romid will help out alot.

 

52680018 is rom id. I used to be able to see mad scaling but since upgrading 1.42 ecuflash it's not there anymore. I believe I have to update my rom to use the tephramods v1 is that correct? If so will that give me some of the maps back again?

 

No. You need new definition files. PM me your email address, I'll set you up.

 

Thank you Golden. Now that I have more maps on the software I think it will be much easier to dial in the idle especially the MAF scaling. Thanks a million!

 

What intake do you have? I may be able to help with the MAF scaling too.

 

right now stock but am making a 3.5 inch MAF housing next week. I have a JM Fab MAF flange.

 

I've been out of the evo scene for some time now, but I do recall that the mivec maps were ignored at idle to some extent when I was working on the cossies I had. Was not related to the warmup maps since I had them collapsed but rather a load and or rpm threshold. Makes sense because they are actuated by oil pressure.

Just saying your not crazy is all

 

Well actually I can make changes to the exhaust cam at idle according to EVOscan log. I have wrong address for the intake VVT so not sure on that. Now keep in mind though that I am at 950 RPM idle speed, not stock. Perhaps I am over the threashhold that is built into the stock ECU?