<951>

I recently bought a 1989 944 turbo s and today I was looking where the KLR is and the whole place was a mess, the KLR was not even screwed in, it was just siting there with duct tape around it so I looked inside the KLR to see what had been done and foud an Autothority 951 020 200 chip in it, so I looked it up here and found this old thread that says its the wrong one for the turbo s.

https://rennlist.com/forums/944-turb...hlight=020+200

is it okay to have these chips or would it be best to replace them with the stock turbo s chips?

toddk911

The KLR chip only removes the boost cut off. Its the DME chip you need to check which I would assume is Auto as well.

Until you get more info I would put stock chips in or just not boost very high.

Or go ahead and get some new chips.

<951>

I just opened up the DME and the chip inside doesn't say autothority or anything, it just has this number:
1 267 355 914
I searched the number here and also on google and did not find anything, I'm guessing it is stock.
it also looks like the DME has never been opened, i did not see any tool marks on the little metal tabs

onspeed

i don't believe that's the stock chip. rather odd that the KLR is chipped and the DME isn't... dangerous too if that's the case. I'm thinking it might be a custom tune, and it's just a generic eprom chip. Or the original label was torn off. But I don't think those number correspond to the stock chips... course, I have an 86, but I assume the numbering scheme would be similar.

Just a guess.

Oddjob

The 1 267 355 # is the factory chip sequencing, printed on a silver label. A spare Turbo S chip I have is 1 267 355 498.


Overboost protection is on the DME chip, so that is still intact if running the factory DME chip with an aftermarket KLR chip.

Not necessarily dangerous, as nearly all aftermarket KLR chips do not alter the boost curve. I dont think the APE KLR chip does much of anything. Likely just a copy of the factory maps.

onspeed

Well then I stand corrected regarding the origin of the chip.

I was under the impression the KLR controlled the overboost function as well as knock control?

Oddjob

Overboost protection is a hard fuel cutoff, triggered by excess airflow measured through the AFM. That limit is mapped on the DME chip.