928S4/968CAB

Any thoughts out there on what I should get?

http://www.promaxmotorsport.com/ = is what I was considering...

T_MaX

When you did the swap did you upgrade the LH and EZK?

John Speake

For a GTS engine, you should be running 928 618 123 30 software in the LH ECU and 928 618 124 30 in the EZK.

Rick Carter

And the best performance chip is from John Speake - Shark Tuner.

DR

DITTO!

..and this is coming from someone who has sold Performance Chips for over 9 years!

John Speake

Thanks !

The LH2.2 SharkTuner for 85/86 US early 32v will be released VERY soon :-)

DR

RDS928S

John,
how will your new perormance software for the early 85/86 32v engine differ from the Autothority performance set up?

Rich

John Speake

You would be able to tune the LH specifically to your car, which will take account of all the tolerances that exist of the various components.

This is always going to be more satisfactory than a "one size fits all" chip.

IcemanG17

Since your running a fairly custom 928.....I also vote for a complete custom Shark Tuner chipset....figure on several HOURS of dyno time + the shark tuner to get it right.......but it will be the absolute best possible chipset you can have for your 928!!

I would stay away from standard chips....due to your GTS engine.....

cobalt

These chips show about 16hp increase on a GTS. Most of this is above 3k rpms. Would you notice an improvement? How much would gas mileage be compromised?

RichS 1986928

John,
Will the shark tuner for the 85/86 take the place of the 2 performance chips currently available?
What's the approx. price?

I bought some cheapo perf. chips on ebay for $99 and I'm always wondering if they are doing anything.
The seatamometer says a couple of HP at most.

John Speake

If you are refering to the 85/86 chipset sold by DR then at present we do not offer an similar tuning package until we get the EZ-F SharkTuner finished

The first release of the LH2.2 ST will tune LH only. We intend to then work on the EZ-F for the 85/86 cars next.

I don't sell chip sets (except standard software). I develop and make tuners for modified 928s.

As far as the orignal GTS chip question I would recommend a change back to GTS software in the LH and EZK. If the car is stock, then that is good enough. (assuming MAF and knock sensor/Hall sensors are OK)

If an x pipe or other performance mod is added, then the car would benefit from a SharkTuner session. There are more than a dozen SharkTuners in the USA now and I am sure some of them will be offering SharkTuner sessions to other 928 owners.

PorKen

John,

Is it OK to use aftermarket EZ-F chips when SharkTuning the LH2.2?

John Speake

Hi Ken
I guess it would be OK, but if these chips give more advance (which I guess they do) I would rarher fit stock chips until I was sure the fuelling was correct, before adding igntion advance.

The ST Autotune algorthm is designed to be "safe" - it moves much faster to richen fuellling than it does to weaken it.

Have you fiited a knock sensor system to your 875/86 car ?