GZE Aftermarket comp issues

[sideshow]

yer tps is fine
how big are the cams
i do run into afew engines that are used for the street with way to big cams
and are just so undrivable
but anyway just tune it with tps

[oldcorollas]

last hijack.. do the microtech have closed loop function yet??

[takai]

For reference, 308* cams with quads was a whole world of pain with the LT8 which i had. Ran rich as anything, and stuttered and popped until about 5000rpm. That was with the supposed best Microtech tuner in Canberra. Almost glad that it was stolen

Cf this with the Haltech which ran like a charm as soon as we figured out the dizzy

[JustCallMeOrlando]

last hijack.. do the microtech have closed loop function yet??

Nope, but I'd hesitate to suggest any of the lower ECU's have proper closed loop either.

[takai]

Nope, but I'd hesitate to suggest any of the lower ECU's have proper closed loop either.

What lower ECUs? Im pretty darn sure that MS&S has closed loop, as does Haltech, Wolf etc. Stingers and Links both have closed loop as well. Seems that Microtechs are the only ECUs not to run closed loop.

Anyway, shall we let this guy get back to the purpose of his thread.

[JustCallMeOrlando]

I digress, but i'll just answer your question. Haltech, Wolf et al (feel free to correct me) use corrections to the base map to achieve their closed loop, not in the same way a factory ECU would do it if you get what I mean, it's not adaptive. That's all I meant

[takai]

Not sure about the EMS or Link, but certainly Haltech (and im pretty sure Wolf had it on their spec list) have adaptive closed loop, running off the O2 sensor in the exhaust. Same way as factory. The one part im not 100% sure on is how the map is shifted, i have a feeling that it is a complete shift of the entire map.

[Ben Wilson]

With a decent tune, closed loop isn't really valuable anyway.

I'ts really only valuable to take up production tolerances in factory engines and ECUs.

[JustCallMeOrlando]

This is what I was referring to before: http://www.adaptronic.com.au/comp.html

[sebta22]

I have wired up 4agte to wolf3d v4 and is running roughly but is running, needs dyno tune.

I have used two bosch ignitors but you can use one but it costs more than the two. Go to http://www.wolfems.com.au/support/su...dv4/dealertech and download tech 3 and 5. 5 will show how to wire either bosch ignitors.

3 will show how to wire up 4agze cas. the 1ggte cas is the same as the 4aze cas. unfortunately i had to buy the little back box from wolf to stop the damn thing firing all over the place.

cheers

[sideshow]

y the fuk do u want closed loop
only if its for emissions
even then u need a very good tuner to get it right
best thing for emissions is a std ecu

to run closed loop u need good ox sensor
and i think only motec and autronic can run in closed loop
maybe haltek not sure

but to set it up cost abit in time mopney and tuning

how well do stingers and links work in closed loop
i would recon noit very good but i might be wrong

[oldcorollas]

closed loop for fuel economy. and emissions.
get it right? the point is that the ECU adjusts quickly to vary the fuel delivery around the stoich point (with stock ECU and narrow band sensor). this will usually reduce the amount of fuel used during cruise (unless you specifically tune it lean with a map only), but also allows the ECU to adjust for varying load and atmospheric conditions.

good Ox sensor = heated from sayy, Bosch, NTK, etc. a wideband is not required for closed loop.

wideband is only required for AFR targetting and lean cruise maps... one of the megasquirt variants does this

it's easy to set up closed loop.. you set the rate of change, the limit of change and the time between checking conditions.. (ie as i said before, 16 ignition events, 5% total change, 1% change per step) you don't even need to fiddle with it.. if the map is perfect, the closed loop will not do much, but if conditions are altered significantly from what the map can perfectly describe, then closed loop is a benefit.

megasquirt (i'm sure you think they are cheap and shithouse ) work very very well in closed loop.... back home i have datalogs showing how much the closed loop was altering mixtures.. initially it was a fair bit (like 5-10%) but with more map tuning, it got down to 1-3%.. BUT at times, conditions chamged that required 5% or so adjustment...

as Ben said, with a good tune it may not be needed, but not many ECU's or TUNERS will be able to tune for every temperature and atmospheric pressure, or humidity level that a car will encounter...

for that matter, how many ECU's do sense humidity??

don't discount closed-loop just because the mighty microtech doesn't use it.
if you are not concerned with emissions or fuel economy, by all means leave the O2 sensor out.....

[craigy]

Thanks for the comments guys, keep the aftermarket comp info rolling in!

This whole aftermarket computer experience sure is a steep learning curve!

I think I'll study a few diagrams and reread the wolf installation manual over the next week and try and get a better feel for what I'm doing.

Then I'll talk to Wolf and get what info I can out of them and work out what path I need to go down, and maybe talk to a tuning shop who deals with wolf computers.

Feel free to deviate from the original topic, and add any experiences youv'e had.

Cheers
Craigy

[roadsailing]

hen/ben runs multicoil doesn't he? just copy his setup as he is using a wolf too.

[craigy]

I havent spoken to ben as yet, I must pick his brain when I see him next!