: · Date: Wed, 24 Jul 1996 17:31:33 -0600 :
: Richard writes:
: >About 10 times now, during heavy load (e.g., going up a hill, hot weather) at
: >average RPMs (3000-3500), I floor the throttle and for an split second I've
: >heard something like a "sizzle" come from the engine. At this point, I ease up
: >on the throttle and everything sounds "normal" again.
: When you say SIZZLE .. do you mean spark knock?!?
: I assume that you do for the rest of this exercise ..
: >I called Dinan Eng. about this maybe six weeks ago and got plenty of attention
: >from the folks there, they were honestly concerned and wanted to answer my
: >questions which was encouraging. What they told me is that this sound is
: >normal and that Steve Dinan and the actual chip programmer (who each drive E36
: >M3s) also experience the same thing. The reasoning is that since the chip is
: >walking such a fine line with the advanced ignition and fuel delivery settings
: >that from time to time, it'll venture into this "sizzle zone".
: They are correct .. depending on fuel quality, engine temp, air temp, and phase of
: the bloody moon, the S50USB30 motor is sensitive to spark knock in the 2800-4100 rpm
: range with most experiencing a BIT of it right around 3000-3500 .. since it is momentary
: there is little to fret ... the knock sensor hears it .. does the job ..
: Also try switching BRANDS of gas ....
: >1. I'd like to hear from anybody else who is hearing the same things.
: See above
: >2. I'd be interested in opinions about the problem itself.
: Ditto
: >3. Do drivers of E36 M3s with other performance chips (Jim C., Autothority,
: >et. al.) in them get these sounds?
: Well, since I have my chip in my car .. yes, I get it also .. I actually get
: MORE of it, since I'm running my spark tables a bit hotter than Dinan, APE, or
: even the chips I produce for my good net.friends ...
: No damage .. and I DO check my plugs every 3000 miles!!
: Of course, all those legal disclaimers apply .. YMMV, etc ..
: Jim
: Chris(Miami)
19:02:47 04/21/98
