CAMO928S4

Has anyone tried and liked a performance chip on a long time periode for a 1988 928S4 wich has an RMB bypass and every thing else stock...
My Porsche run like brandir new and want it to star that's way
Would like a bit more punch to beat the 2009 335ix bimmer i also have in the parking lot
Thikg my 1988 shark goes to 100km/h in 6.5 sec and need´s à full second to beat m'y bimmer....
The shark look´s and handels WAAYYYYY BETTER :-)
Thank´s for the advice.

MjRocket

Contact Porken he's got what your looking for.

danglerb

No chips are are going to drop a car from 6.5 to 5.5 seconds, its not a small power difference.

CAMO928S4

Thanks MJROCKET :-)

On the other hand, i understand that a 1 sec is quite a big gap DANGLERB...
Does any of you hâve experience wich à performance chip on a long KM run ?
How much gain in performance should i expect and how could it badly effect the all around performance of my stock 928S4 1988 ?!?

I appreciate every information you can post, tanks :-)

Bertrand Daoust

Salut,

I don't have any experience with performance chips but often read in the past that they don't do much on S4s.

But read too that Ken's chip set for the '86 is great!
Ken as a set now for S4s.
http://liftbars.com/indexpk.htm

Anyone as those installed?

Would take an easy performance upgrade too!

supercedar

I have a 1988 S4 and Jim C installed his recommended chip which was tuned with his 1988 S4. I noticed a very nice increase in performance with just a 15 minute sharktune for timing only. I still need to do the fuel from what I understand once I install the dilliebob in the exhaust. How about it Jim? I am ready when you are.
Thomas

Imo000

All the retunning does it removes the safety margin that the facory put into the maps so be careful how much the new tune shaves off. Safety margins are there for a reason.

hb4

^^^ Which is why you don't just swap PEMs or PEM programs, why you throw away ATh chips, why you re-tune for every mod, and why you don't tune without adult supervision.

And Supercedar pointed out that performance improved with tuning so that changing the safety factor not 'all' that tuning does. And perhaps 'removing' is somewhat provocative; 'changed' might be better, or 'reduces' if that is what you want to assert.

Since the factory safety margin is just a number, some engines are closer or further from that number depending on their age, fuel, etc, etc. Perhaps a particular tune against a particular engine provides more actual safety factor than the factory safety factor applied to that particular engine.

So... Tune well, and tune often! And enjoy the pleasurable results as Supercedar has done.

danglerb

Long trip the car should be in cruise mode, closed loop, so I would expect little or no change in mpg.

MjRocket

Bertrand

I have Kens chips installed in my 87s4 along with his recomended upgrades and it's a huge improvement to see the least.

PorKen

It's true. "Tunning" the factory maps doesn't do all that much for S4s.


Which is why I have done extensive reprogramming to ensure flat fueling under most all conditions, gear to gear, hot to cold, so that the ignition changes, where all the power comes from, can be most effective. Also, since max HP can only be raised so much, my chips are all about increasing response, which is what makes driving more fun.

Last winter was mostly fuel programming. This winter I am focusing on the EZ-K. Smarter Octane Adaptation and new dual self-learning WOT advance maps. (One for each knock sensor cylinder group, saved to semi-permanent SRAM.)

Also in the works are new features using the coding plug inputs, including adjustable WOT fueling (if needed), No-Lift-Shift, etc.


Log from a self-learning WOT run. 3rd gear, 5-spd. Blue line is knocks. Red is injector duty.
Note green MAF trace plateau after run - ISV is reprogrammed to open fully >4000, reducing vacuum/oil ingestion.

Rob Edwards

Can you hook the coding plug control to a mantinetto on the steering wheel?

MjRocket

Ken

This sounds Awesome!

When do you anticipate this being in the wild?

PorKen

Si, Signore.

That's a dilemma I've been trying to work out, actually. Including buttons, there's to be a knock/error LED and a Sport/CO Mode LED. I don't know where to put the display. Prolly will end up being in a thin box to stick against the pod or elsewhere.

(CO mode is like the Blink'r for S3s, used with the red CO adjuster, above.)

Surely by spring time.

jcorenman

Sharktuned yes, about 100K miles. Runs well, no problems.

There are basically two choices: Drop in a chip which was tuned for someone else's car and hope that your engine is the same. Or, invest in the tools (or find someone who has them) to tune your specific engine for its optimum performance. (Or the third option, keep it stock and be happy).

The original "one size fits all" chip was Porsche's, which had to accommodate a wide variety of production tolerances, fuel octane, temperature and altitude, aging out-of-calibration parts and carbon buildup (higher compression). This is the safety margin that Imo000 mentioned-- some of is production variations, some of it is the effects of age and miles. If you tune your engine, then you don't have to worry about parts tolerances, differences in factory CR, etc.

So it is not hard to get an extra 10-20 hp by tuning for a specific engine, but whether that will be appropriate for some other engine is rolling the dice.

This is true. But shouldn't an S4 be faster from 0-62 mph than 6.5 seconds?

The first step in any quest for power, a step which is almost universally skipped, is to make sure the engine is running as the factory intended.