Japtastic141

Thanks for looking at this. I looked at your examples and your manual calculations and also did my own on a few different places and the mixture map is very close on all the areas I checked but your layout helps a lot and I now have a better understanding of how to manual tune and interpret the logs better which is invaluable. I've been through and double-checked the mixture map vs my own calculations on your WB vs AFR LOG layout page and this I what I now have. I won't be able to do another log tonight but will tomorrow morning to test it and post the results. Not sure why it's still not looking quite like your 3D map and if you are saying the hundreds of RB's you've tuned mostly look like this (with similar mods to mine) then I'm not sure if I'm still tuning it wrong or something else is skewing it. Could it be the injectors? And could that be the reason I'm not seeing this area taper off as you'd expect? REV16 - G4X R32 GTR+OLLC ON-AMS AFR-2nd changes.pclx

I'm wondering if my 30-year-old injectors are playing up and skewing my results. I did take them all out, clean them and test and seemed to be ok but you never know how they are performing under proper loads and not just on the bench. The figures I have for them could be completely wrong...

Thanks for all this. Starting to make more sense now. Been out to log some more this morning. Same map as before but with the new AFR targets you provided. I had a quick go at correcting it based off the logs but still not getting anywhere near the shape of your 3D map. I'll spend some more time later but any suggestions welcome. Cheers https://drive.google.com/file/d/14UriU8I6qr1UrozevN8wFD8O5cE-lYHR/view?usp=sharing

Yes, that matches mine. Thought you meant to turn the Injector Timing Table on so not sure what you meant by "Your also running a static injection timing figure that will also affect EGT's/afr readings" I'm wondering if I wasn't too far off tuning my fuel table but one of the main issues was that my target AFR's were way richer than they needed to be. This massively skewed my 3D map vs yours. I was just erring on the side of caution basically. The two pics below show the comparison between my guestimation targets and yours that I've now swapped to. I was also running a flat figure across all rows from low RPM to high. A stark difference! I'm still unclear on how exactly OLLC works within the Link platform. What is it referencing and how is it calculating what it needs to adjust and why did turning it on make my fuel so dramatically rich after around 50% TPS and beyond mid-range RPM?

Ok great, will try adding timing for the cruise areas first. Do you mean turning this table on? If so, I haven't even looked into that yet so any guidance welcome.

Around the 20's on my 100% TPS to 7500RPM runs. Haven't tuned it yet. No compensation that I can see in the logs.

Brilliant, thanks! I'm targeting a lot richer after 100 MAP on my AFR table so will tone it down a fair bit now I've seen yours. One thing I did notice was that at cruising speed / 100MAP, I was seeing around 900c exhaust temps at 14.7 so brought that down to 14.3 which improved temps.

Thanks again. There certainly is a lot to learn and I appreciate the help. I'm learning a lot from EPA and HPA but nothing like speaking to an experienced tuner. Strange that I'm not getting that close to your 3D fuel map even after multiple runs and adjustments. If you have a decent layout file I could use that would be great. The other thing would be a target AFR table you recommend for the RB26.

Turned on OL and did some more runs, has made things a lot richer. I'll spend some time looking through it all. Any suggestions welcome. Cheers. https://drive.google.com/file/d/1oY1bRkfRJWxRVo1jkZsReCGiZ8FVrP8F/view?usp=sharing

Thanks for that. So after I tune it with the above method I turn off OL and turn on CL?

Confused as I thought it was best to have these controls off when using the mixture map and doing the initial tuning of the fuel map to get it dialed in? I have a permanently installed AEM CAN WB that will do the CLLC after I tune it. I didn't intend to use the OLLC at all.

Fairly standard RB26. Breathing mods and a couple of R34 N1 turbos. Better fuel pump and 550cc injectors. I wonder if what I'm doing is correct from a road-tuning point of view. I'm using the Aplha-N method. Just wastegate pressure at the moment which is 0.6 bar. After a bit of trial and error, I think I have a plan but I'd like to know if it's a valid way to do it. Started off with the base map from Link, smoothed it out a bit, and then did some pulls to make sure I wasn't too lean. Adjusted the main fuel a bit on the rich side to ensure this. Started the log and turned off OL and CL AFR control. Went for some pulls and tried to hit a lot of cells. The best way I've found was coming right down to 1000-1500 RPM and then doing a pull in 3rd, 4th or 5th gear holding the TPS at various points. So first pull at 10-20% throttle and hold all the way to redline. Then rinse and repeat for 30, 40, 50, 70, 100% TPS. This filled up the mixture map a good chunk and I now have some data to work with. I took a look at the results and applied corrections (from the mix map) to any cells that looked sensible and had a decent amount of samples. This made the map a bit spikey again so went ahead and smoothed it out a bit on the 3D map. Below is my map file and log before any changes and then my new map after I applied the changes. I haven't had a chance to go out again but will do soon so should have another log file in the next couple of hours. https://drive.google.com/file/d/19ITEiFUfCT3eb9Cgq0oGEKuD2q60PNdb/view?usp=sharing G4X R32 GTR.pclx

Thanks, Kris. That's good to know. I'm yet to put the MAC 3 port in as I've got so much else to learn that doing that as well at the moment is going to overload me! I know this means I may well have to tune it again but that's fine as all good experience.

Ok, in that case, I will wire up the wideband to CAN for more reliability. Any experience in how reliable the AEM/Bosch WB is? I know it is a low-cost option. So are you saying you take out the RPM, TPS and MPA lockout limits and just let CLL have control of the whole map? Then presumably turn on long-term fuel trims?

Haha! Didn't realise they were from an RX7. I've had them all out, ultrasonic cleaned them and tested the flow and leakage and appeared all good so I decided to stick with them for now. They are low impedance with the resistor still in place. Yes, RB26DETT. I have 100's of questions while getting used to PC Link vs FC Edit/Co-Pilot and am finding lots of answers here and HPA but here are a couple I'm stuck on. I've done around 50 miles of road tuning and some manual and mixture map adjustments to fueling. 1. I'm not sure of the best way to handle boost control. The first part is the physical aspect. I've still got my old boost controller in place at the moment but do have a MAC 3 port ready to put in. My only reason for not putting in the new 3 port was thinking that it would be another thing to learn on top of an already very steep learning curve and using a known entity to start with would be beneficial. The second part is the software aspect and how to adjust this. Do I use the 4D Fuel Map, Open Loop AFR target overlay (and what AXIS' are the most common?) or some other way I've not come across yet? 2. I have a permanently installed Bosch/AEM AFR WB installed and the analog output configured in PC Link. Once I've got my tune a bit more refined, how good is Closed Loop Lambda control on the RB? Are the default values in the settings for CLL some generic values or refined to the RB? The settings seem fairly conservative with a cut-off at 80kpa MAP and 5000RPM. If these could be increased could I rely on CLL more for fueling corrections above these cut-offs or is that a bad idea? Thanks!

Thanks for the link. Will check through that. That is the standard one from the pre-loaded base map. Maybe an issue from Link on that one. What values should I use there for my injectors?

Thanks Adam. I was discussing on another forum as well and you are right about the offset. -350 did the trick I must have installed the AEM disc upside down. For the R35 coilpacks, I have copied the dwell table from the 350Z. Presumably, that’s still correct? Do I need to make any adjustments for my Denso 195500-1370 injectors in the dead time table? Realised that they are 550cc not 600cc. I'm also running a Nismo FPR and an upgraded fuel pump. This is currently running at 3.5 bar at idle. I believe the standard RB setup is 2.5 bar at idle. Also, what's the deal with the 12v value going up and not following the curve down?

Yes I believe so but will double check in a bit. I can definitely smell fuel after cranking so probably yes. Can’t really hear it trying to fire, throttle open or not. If it is it’s the most minimal amount I’ve ever heard.

Hi all, I may have something very obvious wrong but I can't see what! I'm coming from the car working with a PFC to the swap with a G4X where it won't. I made the change to a 24-tooth AEM disc at the same time and believe I have the settings correct and the timing correct. All lines up when I use the timing light in the calibration mode now I have moved the offset to +10 there. I have 600cc (vs 440cc stock) injectors so I changed the master trim to -20% but tried both ways and no difference. I also have R35 GTR coils so I adjusted that as well but again, it makes no difference whether I leave them standard or adjusted to the no-start situation. Any help much appreciated. P.S Don't even know if the log I attached is correct, just shout if not. Cheers PC Datalog - 2024-02-16 10;32;29 am.llgx Test.pclx

Thanks, managed to get a G4X cheap

Hi all, I currently have a Power FC which may be going faulty. The G4+ or X isn't in the budget right now but I can get a G4 for around £500. What would you consider are the biggest features that I'm going to miss vs the newer models on my engine?