Curious, on a cold start ... how long does it take to go from Sync_Status = 1 to when the RPM reaches 1000 rpm?
This is a good benchmark to understand how refined your calibrations are.

 

I have had my 506 in for a bit over a year now. Love it! Tuning it is 1000x easier than the factory ecu.

 

Although flashing and updating calibrations live on the aftermarket ECU's is def a plus from a tuner stand point, but nothing beats the drivebility of the OEM calibrations that is engineered for all temperature and elevation ranges.

 

I'm not sure where you got that type of information from but it is simply not true, modern aftermarket ECU's will give the tuner ability to do basically anything an engine could ever need. The tuner does have more work cut out for them though with an aftermarket ECU to correctly set up and tune all these trims from scratch. I regularly set up and use air/water temps and barometric pressure for ignition, fuel and boost trims on AEM infinity ECU's and Motec ECU's i tune both of which deliver superb drive-ability. It's time consuming but well worth the extra effort IMO.

 

I am simply asking for data to see and not a screen shot of your Infinity setup. Infact looking at the boost duty cycle tables, I see a lot of areas that could use some blending to smooth out the transitions….

If you can show data of the cold-starts then I will buy the fact that you’re as good as the pics.

Status_Sync = 1 to when the RPM reaches 1000 rpm…. For multiple colds temps.

(on a side note, do you think infinity does multi-cylinder deactivation on decel? Can you manage the order? Or filter the position and negatives torques? … I would love to see how you do this J )

 

i was showing the trims for boost as someone commented about them earlier. That screen shot is from a supra if I recall correctly.

for start and sync IMO the infinity is not the fastest to sync depending on cam/crank trigger. I have also seen many situations the cam/crank will get a sync error during cranking which slows down starts even more. There are ways around most of the issues but again still not the fastest to sync/start. I’ll try and get some logs this week when I’m back to my sr20 car with an infinity. Ideally I’ll get a log of a fast sync/start as well as a sync error/slower start so you can see how fast and how slow it can start. Normally if the ecu syncs and then gets no sync error the engine will start very quickly.
It seems to me the ecu wants to see 720* of crank rotation before attempting to sync. This gets extra problematic when voltage drops to much during cranking.
Most consistently fast starts I’d always say oem ecu and Motec M1 ecu’s ftw.

For decel cylinder cuts cuts for things like rally style antilag I wouldn’t always recommend Motec m1. Infinity does not have any easy/reasonable way to control individual cylinder cuts/decel, ways to do make it work but not the most elegant solutions with the current firmware.

 

The Evo needs more resolution ( 12 tooth trigger wheel ) on most aftermarket ecu’s .Some aftermarket ecus get upset with low voltage.

+1000 for Motec M1 series for an incredible,stable ecu. It’s OEM level hardware/software that just works.

Even the old M84/400/600/800 were powerful and stable. Even with those units being 20 years old they still get the job done.

Plenty of reasonable options these days.

 

This is primarily why I am advocating for the stock ECU capability and not the aftermarket route. The stock ECU is consistent, and more than capable of delivering the needed functions for all kind of power and drivebility metrics.

As far as the decel cyl. cuts, I am not referring to antilag, this is completely different.
The injector pw calibrations should take care of the voltage drop during cranking, unless the voltage drops to extreme levels where the starter won't turn (below 8V).

Advice to the community; With the open ECU resources the EVO platform has, no one needs an aftermarket ECU!




Curious, what didn't the stock ECU offer you that Motec did?

 

I've used a lot of oem ECU's and aftermarket ECU's for EVO's and other applications and they can all be made to run an engine very well. Stock ECU (with custom rom) is great/super affordable but it does not offer some of the features that aftermarket (motorsports minded) ecu's support. Personally just the logging speed/rate, ability to use a flat response knock sensor while tuning the frequency the ECU listens to and engine protection features are worth using an aftermarket ECU like M1 or Infinity for me. Layering fuel tables is also a nice feature of the aftermarket ECU's. I will normally use 2 main fuel maps (TPS vs RPM + Load vs RPM) on top of the normal fuel trims. This gives huge resolution and is very helpful for ITB's or BIG throttle bodies on small engines in circuit cars or street cars.

Decel fueling is very simple and if you are only referring to normal decel fueling then yes the Infinity and m1 support and it's very easy to set up. I normally run a full decel cut on all cylinders until ~500rpm before idle speed. There is also a couple wall wetting fueling tables that can trim decel fueling as the throttle is only lowered slightly. (DBW throttle control is also a reason i like using the Infinity or M1).

Again not saying stock ECU is a bad option at all just trying to stay on subject and help explain some of the features i personally like to use when working with an Infinity or M1. I have to use and support the stock ECU as well and am VERY happy there is all the support and development for the stock ECU but i'm not going to limit myself to only stock ECU just like i would not want to limit my self to only aftermarket ECU's

 

An evo at near stock power levels is great with the stock ecu. The further you go from stock the more likely you are to use/need/appreciate a good standalone. The fastest evo's,supra's, wrx's etc all run a standalone ecu.

The stock Evo Ecu with Tephra mods is great to a point but in the end its a 2005ish Ecu with some custom coding. Its affordable and convenient. But there isn't a fail safe protection.

If you lose oil pressure on the stock ecu, by the time you see it on the track its too late.Same goes for leaning out the AFR (hot track day, fuel pump dying). A few seconds and your investment is burned up. No live tuning/affordable flex fuel etc. The logging over 8000 with evoscan also isn't that great.

A standalone also offers live tuning, faster logging, flex fuel and many other features. You can adjust almost any parameter you desire. Timing on start up, Injector PW, target AFR, Add fuel in high gear after xx time to cool the cylinder for those long pulls etc. Most standalone ecu's are designed to run speed density. Its their native language.

A good standalone also has logging you can enable at whatever data points you want to capture. An example, mine is set to log at 100% TPS. I can go back and pull a log weeks/months later and it only shows the wide open runs.

I used an Infinity and it was much smoother then the stock ecu but I moved into the Motec and wouldn't look back. The Motec offers OEM level of start up,reliability and has soft cuts. I'm running a DBW TB as well. I can enable rolling anti lag with a button, or rally anti lag under x TPS. I run my car daily around 600whp and it runs better then a stock evo.

Here are a few links you may find helpful.

This isn't my car but it is the best example of a well built evo ,professionally tuned on a standalone. Its had 10 years of abuse and power has gone from 800-1000whp on good fuel. It was built to be run hard so its been beat on each and everytime its been taken out. If a fuel pump ever went out or it lost oil pressure it would cut and save the engine.

 

This is exactly why I went aftermarket. Safety first! I went drag racing a couple weeks ago and on my drive home, my line going to the fuel psi regulator popped off without me knowing. Sure enough, I go to get on the freeway, get barely into boost and the car cuts the throttle. Not sure if it was reading low fuel psi or a lean condition but it cut it off before there was even a possibility of hurting something. The factory ecu wouldnt care and would have let me melt a couple pistons.

 

The M1 series ECU's are some of my personal favorite ECU's to set up and work with. Unfortunately the price point keeps them out of reach for most people, luckily there are other GREAT ECU options that offer almost as much but at a much more "user friendly" price point.
Example:
-Motec M1 series ECU kit (ecu, harness, package/base map) starts at ~$3500
-AEM infinity ECU kit (ECU, harness, package/base map) starts at ~$1980
In a nut shell the motec M1 will end up costing roughly twice as much which is worth the $ if you can afford it.

**not taking away from ANY of the ECU options listed in this thread, they all have their place and they all work great for what they are. Stock/tephra, AEM, Motec ALL great options with amazing abilities. Also a LARGE range in costs so weigh your options and choose what's right for you

 

Its important to put a number on your time and what the finished product will be.

 

Very interesting new offering available now for the Motec M130 ECU,
brewedmotorsports.com/motec/m130-gp-lite-ecu-package/
The new M130 GP lite package still delivers a lot of features and brings the price point way down compared to a full GPR package.

 

Anyone here still using an Infinity? My RB25 still has a 506 infinity but my SR will get a motec m130 to replace the 508 that was on it.