PorKen

The trouble with tuning with the available tools is that as soon as you disconnect the 'tuner', the chips are static. If the weather changes (or you change gears!), you have to retune, or live with a bad tune...with the safety factor removed. And, you are still limited by the stock code/maps. 16 columns for WOT?


My S4 chips have 64 column WOT maps. The LH has custom programming and compensation maps to keep WOT fueling† in the high 12's summer to winter, gear to gear‡. The EZ WOT map is 3 x 64*! Knock feedback self-tuning high resolution WOT maps = a perfect tune, day to day, plus self-adjusting overall advance level and auto selection of one of 3 cruise maps = part throttle satisfaction.

My chips adjust so that if you drive 'aggressively' the LH goes open loop until you chill out. And now, if you keep driving 'like you mean it', the EZ will check more often to see if the overall advance level can safely be brought back up.

So...the real choice is between stock, an occasionally good stock 're-tune' (AutoThority also fits in this category), or a self-adjusting awesome one. (Kind of like picking a TB-tensioner.)



*One base EZ WOT map, two learned ± maps for front and rear cylinders.
†Smoothing on MAF, voltage, temp2 inputs ensure a consistently flat AFR, too.
‡Field adjustable base fueling is adjustable if needed. Separately adjustable WOT fueling, coming soon.

jcorenman

Seriously? You are comparing Sharktuning to Autothority chips? Your "Snarketing" has certainly reached new levels.

Cameron

PorKen,

I was looking for results of your chips on a stock '87 S4 automatic. There are a lot of threads and I did my best, but the closest I could find were results from an S4 auto that also had an Xpipe or headers installed. The the dyno results don't show improvement in performance vs stock S4 auto. Can you point me to those results please if you have them?

Also, please correct me if I read this part wrongly, but I believe that your chips require 24# injectors be installed first. Please confirm.

Thanks!

PorKen

Defensive, much, Mr. One-Size-Fits-All?

AutoThority chips are stock chips with some maps adjusted. The difference is?


Again, I'm not knocking the SharkTuner. I admire the work that went into the hardware and software.
I think it is a great tool for more heavily modified cars - as it was originally intended for.


Stock S3/S4 engines, maybe with a X-pipe? Better (and better) with my chip.


I don't know of any S4 auto dyno runs with S4.S300s chips, as yet. The newest, higher performing update has not shipped.

Note max HP will be higher, but it is difficult to get over 305 RWHP (5-speed) with the stock intake. I have concentrated mainly on response and smoothness. More average power.

24# injectors, yes. Most installations so far have been done as part of an intake refresh, which is recommended, anyway.

Cameron

Porken,

Understood. Thanks. Do you have any S4 manual before and after dyno results with stock intake / exhaust?

Thanks,

Cameron
'87 S4 Auto

PorKen

Not with stock cats and the chips.

I will be doing more dyno runs when the weather warms back up (we have weather here). I will include a set with the cats and stock cat-back installed.


My early '88 5-speed (60K mile) is basically stock, including stock crank venting, except the intake manifold has been gasket matched like on GTs (didn't change the output noticeably).

kurt_1

Can you explain how "No-Lift-Shift" could be done by reprogramming the chips?

AFAIK (not much! ) there is no electrical connection between the trans and the ECUs. OK the tach signal used to trigger upshifts under kick-down operation is actually coming from the EZK but how can the ECU actively prevent upshifts?

Or did I get this wrong?


Kurt
__________
90 S4 satin black metallic
928 OC Charter Member

PorKen

Do you mean Dynamic Kickdown, like the GTS has?

I'm talking about a new feature for manual cars to let them shift like an auto. Push in the clutch and a second, lower, rev limit is applied. This means the accelerator can be planted on the floor while changing gears. I have it on my own S4 5-speed, but I'm using the auto trans gear select input for the clutch switch. I have to reprogram it for a coding plug input for simpler installation.

Autos have transmission two inputs into the LH, one for neutral selection (for a brief idle speed drop when selecting D - if the A/C is not on) and one for the pressure switch which indicates when a shift is occurring (ignition retard to protect the trans at high load/rpm).

This brings up another point. The SharkTuner chip has a good chunk of new code, but all of it is to communicate with the interface box and/or make the stock ECUs work with heavily modified engines, using the stock maps.

AutoThority chips are stock with edits to stock fueling and ignition maps, but no new programming. They were (crudely) made in the 90's when there weren't any off-the-shelf tools to edit the maps outside of the factory.

Most anyone can fiddle about with the stock maps now, but they are still restricted by the limitations built into the generic Bosch programming (w/small tweaks for the 928) and there are many variables and maps which are still not available.


S300 chips have hundreds of bytes of new assembly language code, months of tuning/logging/dyno-ing of both factory and new maps and changes to hidden variables and maps in both the LH and EZ, all to convert the docile stock chips into smoother, higher precision, smarter, more responsive, higher performing ones (that you can adjust in the field with a screwdriver).

kurt_1

OK now I get it, I thought you were talking about autos!
Since the clutch switch is already there for the CC, not much new harware is needed to implement this feature.

Maybe one could add a hidden switch for "valet parking" mode so that the rev limiter kicks in already at 1500 rpm :-)

Kurt
__________
90 S4 satin black metallic
928 OC Charter Member

PorKen

I've been meaning to try something like this, but for Traction Control or even a basic Launch Control. Push, or push-and-hold, a button and either the fuel is cut or there is a lot of ignition retard to keep rpms below ~2500, until the clutch is let out, or the button is released. I just haven't had a free input until now...I'll be moving back to the coding plug soon.

All the code for EZ WOT learning and smart Octane Adaptation is done. Now I'm tweaking the parameters for the optimum level of advance with the fewest test knocks. For example, if there isn't a light knock or two at full throttle (within a long enough RPM range) then the engine is not making maximum power. (There will be a Low Octane/Safe Mode switch which will be more conservative.)

The WOT AI is sweet. It stores where knocks occurred and increments ignition retard in separate left/5238, or right/4671, 64 cell tables. (Not enough mem for individual cyls. ) This tunes the engine far better than any human could ever do...over time it also raises areas that are knock free and retests old knock cells, too. With each WOT pass, knocks fade away, with no apparent loss of power.


Why all this trouble? If you are SharkTuning a turbo or stroker, you can afford to use coarse, 5 or 16 cell tables, run it overly rich with a lower level of advance to cover cold to hot, low to high air pressure, gear to gear, etc. WITH a stock engine, higher precision is needed to extract its maximum potential, safely.

safulop

Ken, I'll be buying a set for my 88 next month I figure. My car came with Autothority chips, and they are C-R-A-P. Problems with high idle speed in neutral, overfueling at idle producing low city mpg, and so forth.

As for the requirements, what do we mean by "MAF screens installed" and "S4 camshaft" (don't all S4s have S4 camshafts)? I'll ask Roger about the special fuel injectors, I take it those are different from the stock originals? I think my car still has original fuel injectors.

-Sean

yardpro

Ken,
Next fall I will be adding boost to my 87.
My question is ...
Will your chips handle boost without further mods?

PorKen

It would be a good idea to switch to stock chips first, to eliminate any issues that might not be from the ATy chips. (I have a stack of them, or can burn a set, if you need some.)

MAF screens are the mesh pieces on both ends of the MAF. Sometimes they get lost, or folks remove them 'for more power', but the MAF doesn't measure properly w/o them. (S4s have enough problems with MAF readings. It is near impossible to get the near flat injector duty/AFR over 5600 in the log above w/o the code I shared - here...at a minimum.)

So people may have installed GT, S3, Colin's, or some other cams. It's possible the new EZK WOT-AI could adapt, but WOT fueling won't match the peaks/valleys of a different cam.

24# chips, a little larger than the originals for better stability at max output.

Unfortunately, no. Larger, 24# injectors are already running at ~90% at peak HP (19's hit 100% before that). You'll need even larger injectors and a custom mapping to handle supercharging.

safulop

Thanks for info, Ken. I have had mechanics crawl up and down this engine for the past 4 years, so I am pretty sure that everything is straight besides the dumb chips. Performance is generally excellent as is the running order, and highway mileage is superb. There is low-rpm overfueling, which leads the car to almost fail smog every time due to high HC.

I tried once to replace with burned stock chips from one of our suppliers, but the chips turned out to be blank so it was an exercise in futility which cost me 2 hours of shop time.

At this point I'm going to move directly to the upgrade chips and hope for the best. If I did get stock chips in there, my shop isn't going to find anything if they have not already in any event. I will have them check for MAF screens, I suspect they are intact because the PO had it rebuilt.

Cheers,

Sean

CAMO928S4

Seems to be alot more to chip tunnig than what i expected
My 928 has to be a reliable weekend road car so i Will stick wich the STD mapping
Thanks for the info !