apanossi

I was trying to find out details regarding my current DME setup. Specifically, PO had an Autothority chip in place (image attached). I have scoured the Internet and this forum, but no luck in getting details about the chip. The car seems to be running well with it, but I really don't have a reference to stock to see if it's an improvement. No pinging or other issues but there's a little sticker on the gas tank lid saying to use only 93 RON or higher. That's hard to come by these days. I need to know if I should take it out or leave it given no performance issues that I can tell. It actually seems to run better than my old stock RS America. My current car is a 1994 C4.

C24FUN

Sorry I can't help much with details, I can only share your frustration with the lack of info on the Autothority chips.

My '90 C2 has the Autothority MAF intake and a matching DME PROM. I have been unable to find many details about the chip other than they boosted the redline by 200 rpm and, like most chip vendors, in order to get a few more horsepower, they advanced the ignition timing to the point that on hot days I can still get pinging under load even with 94 octane (which we can still get a Chevron here in Canada).

I have use a prom programmer to read both my original factory chip and the Autothority version but without detailed knowledge of where the various fuel and ignition maps are, it's like looking for a needle in a haystack.

I would really like to modify the Autothority chip to revert back to stock redline and timing as much as possible and just keep whatever changes were needed to adapt for the MAF intake.

Hopefully there is someone out there that can help us find some answers!

Cheers,

Jim G.

Parman

My '94 C2 came with an Autothority chip and I didn't know this until I replaced it with a Steve Wong chip. It runs much better with the SW chip. I'm also in CA.

onceover

93 RON is equal to about 90 AKI, which is used in the U.S. and Canada for rating fuel

PNine64

When I first got my 93 964 it was idling high (1,100 rpm) but the Wong I replaced it with (accommodates primary bypass) got it where it should be. I've never confirmed a performance increase...it just runs well (92+ octane/US).