Which Ecu?

[Mushroom]

Guys,

I have talked to a tuner and he is happy to use either ECU for my engine, I know some people with haltechs and they have had some small problems but know noone with an Autronic to see how theirs runs and if there are any issues with them.

I am looking a these models E11V2 (Haltech) or SM4 (Autronic). I will be getting the intergrated boost modules and wideband O2 modules and external coils as well. Can people give me some informed real world expreience with both and their opinions please.

Cheers

Mushroom

[discopotato03]

As with all aftermarket computers the greatest dramas are usually the CAS interface and the software . I have used earlier versions of Haltech and Autronic and I found the Autronic software to be better . Not because pretty bar graphs were more user friendly but because air temperature/density compensation was more appropriate .

Before EFI Technology (Haltech) moved I used to drop in and get their blurb sheets and occasionally talk to them about connectivity to various OEM sensors . Their later ECU's were getting to the point of talking directly to Nissan 360 degree optical sensors (CAS) but the box had to have enough processing power and input/outputs to sequentially drive 6 coils and 6 injectors .

From past experience I liked Haltech because it was originally based around GM/Delco sensors which are (were anyway) cheap and plentiful because of the sheer volume of Commode Doors and Camiras . Actually getting the Haltech to talk to the engines sensors was usually pretty easy though they were not as concerned as I was/am about the benefits of sequential injection .

The Autronic SMC software I used did a far better job because you had all sorts of options such as charge temperature compensation from either water or air temp and once I got my head around the compensation from air temp bit and some sound advise from Allen Engineering In Mallala it worked really well . That was much of the secret to making a cold engine start/run/warm up perfectly every time . Its also the thing that makes a huge difference to timing compensation on load because charge temperature can be a lot of the reason why engines detonate . If you can be a little behind the detonation threshold and know the computer can be tuned to be safe but not overly retarded its about as good as it gets for a MAP based system - without knock sensor feedback that is .

BTW if you ever saw pics of Allen Engineerings dynocell you would have noticed a MAF or hotwire sensor being used to log airflow as part of the tuning process . That alone says it all about MAP sensors for me .

Hope this helps be research current systems/software , cheers A .