DIYEFI.org Forum

Regarding the earlier topic of this thread I found an interesting forum thread about software dynos http://speedtalk.com/forum/viewtopic.php?f=1&t=8126

Check out this video regarding IAT http://www.youtube.com/watch?v=1pOGSCsU-T8 Not slowly, but you don't want to consume extra fuel to accelerate. ( EG. I cruise at 45mph, follow by accelerating up to 55 or 65mph which I go into boost pressure and see say 7psi of boost. Instead of adding fuel in that...

I've seen several maf's most that IAT's generally have them going to the ECU but not for the maf, but using for spark correction. I'm going with the standard hot wire \ hot film, both these wouldn't require an IAT sensor to give an accurate air mass reading imo. push a bunch of air over thats heate...

No I am thinking of a MAF sensor, which is the most direct way of reading mass. Now a MAP sensor in a SD VE system does require an AIT sensor to correctly calculate airflow\VE I would like to know why you think a MAF sensor requires an AIT sensor. Lookup MAF's, they need an IAT sensor, otherwise th...

on a stock setup car so far I've seen it down to differences at different load levels and rpm areas. I don't like the idea of single values like up top. Best to have a map for each cylinder imo. Part of this issue will be down to the fuel injector the other part due to airflow issues Hmmm OK I see ...

That really depends on the engine in question. A screaming cammed up NA engine that revs to 20k will want maximum cells RPM-wise, and 8 or so will be fine load wise. And a heavily (30+psi) boosted low revving engine (5 or 6k) will be fine with 8 or so in the RPM direction, and need upwards of 20 in...

OK now I'm thinking of making my own ECU from scratch with or without maps doesn't really matter I'm just trying to get the methods and operation completely figured out in my head. All numbers are plucked out of thin air, I'm just getting at the method involved. Oh and I'm thinking about my 600cc mo...

Hmm well thanks guys I probably would have wasted a lot of time on that. I might still do a basic one just for something to do but not put any serious time into it.

Hmmm OK so I think I'd like to have ago at making a virtual mathematical engine which I could write control algorithms for and run on a virtual dyno to see how well the control algorithm works. I can see this being very useful but it would have to do a decent job of replicating a real engines odditi...

Could you possibly go into detail when you have more time?