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DISCUSSION => Engine + Driveline => Topic started by: silverblades181 on January 04, 2007, 02:29:07 PM

Title: MarkD chip 91 or 93?
Post by: silverblades181 on January 04, 2007, 02:29:07 PM

Whats the difference between the 91 Octane and 93 Octane MarkD chip? And the 93 Octane chip is not on the EAT website...

Title: MarkD chip 91 or 93?
Post by: Alpine003 on January 05, 2007, 10:18:11 AM

My guess is a more advanced ignition curve. Probably only 1-2 degrees.

Title: MarkD chip 91 or 93?
Post by: silverblades181 on January 05, 2007, 11:03:58 AM

Anything more precise? I assumed timing was a bit more advanced but if it's only that then I can't justify the price of 94 Octane gas over 91...

Title: MarkD chip 91 or 93?
Post by: Eurospec on January 06, 2007, 02:24:53 AM

Have you tried emailing or PMing Mark on one of the forums?

Title: MarkD chip 91 or 93?
Post by: silverblades181 on January 06, 2007, 12:42:05 PM

I've e-mailed him twice, he seems to be busy because I haven't had a reply so I thought I'd try the forums.

Title: MarkD chip 91 or 93?
Post by: rabidroco on January 06, 2007, 05:47:18 PM

I called him about the exact same thing. He said he just advanced the timing it a little while using an a/f meter to keep it percise. He hadnt dyno'd so there arnt exact numbers to compare the 2, but i dont think its a big gain from 91 to 93. I ended up going with the 93 since they sell 87, 89 or 93 here.
overall i love the chip, felt ~10% gain in the butt dyno.

Title: MarkD chip 91 or 93?
Post by: silverblades181 on January 06, 2007, 05:50:51 PM

cool, thanks, btw new question for those who have the chip, is there a rev limiter at 7100 rpm?

Title: MarkD chip 91 or 93?
Post by: rabidroco on January 06, 2007, 05:55:25 PM

he'll set it at whatever you want. i got mine at 7k