timing advance - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

91s13coupe · 07-08-2002, 04:46 PM

i have a 91' coupe and i need to know what everyone is having good luck with as far as advanced timing. im going to put a step colder plug in to prevent detonation. so how far can i go! oh yeah, i have no forced induction of any kind!
thanks everybody!!

07-09-2002, 10:45 AM

Fill up with low octane pump gas, leave your distributor hold down a little loose (so you can just barely turn it) and take it out on the highway and "rod the $h1t out of it <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sly.gif" border="0" valign="absmiddle" alt=':sly:'> " stopping every so often to advance the timing until the engine just starts to ping, then back it off just a touch then run a higher octane fuel (91 or so). There are too many variables to tell you exactly how many degrees advance you can have.....it's pretty much trial and error.

-Steve

240 2NR · 07-09-2002, 11:07 AM

Well if you plan to run the lowest octane available, then leave it alone as the book calls for 91, so running 87 or 89 is with the "safety net" nissan left in the timing so just such a thing could occur without detonating the engine to death. If you plan to religiously run premium then a couple degrees shouldn't hurt anything and really will help burn that more efficiently. Safely you should be able to go to 24 degrees BTDC (22 is spec). Any more than that and you may wish to start dyno tuning to see where the power really peaks or falls off so you can accurately guage where the timing does the most good (then when you know you can tell me). Mine is at 23-24, advanced from 21-22 and it's hard to say if it really did much, if nothingelse I think it improved my idle). Remeber to listen for pings.

uiuc240 · 07-09-2002, 11:14 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ July 09 2002,12:07)</td></tr><tr><td id="QUOTE">Mine is at 23-34....</td></tr></table><span id='postcolor'>
23-34 eh?  You got VTC, Steve?  You didn't tell me that.  Hehehe.  j/k

Eric

07-08-2002, 04:46 PM	#1
91s13coupe Leaky Injector Join Date: Jun 2002 Location: blue springs, mo Age: 52 Posts: 62 Trader Rating: (0) Feedback Score: 0 reviews	i have a 91' coupe and i need to know what everyone is having good luck with as far as advanced timing. im going to put a step colder plug in to prevent detonation. so how far can i go! oh yeah, i have no forced induction of any kind! thanks everybody!! __________________ [IMG]http://www.imagestation.com/picture/sraid43/pdff9475e53f1e81e41da0332e76c32e0/fce514e2.jpg[IMG]

07-09-2002, 11:07 AM	#3
240 2NR Zilvia FREAK! Join Date: Dec 2001 Location: Denver Posts: 1,131 Trader Rating: (0) Feedback Score: 0 reviews	Well if you plan to run the lowest octane available, then leave it alone as the book calls for 91, so running 87 or 89 is with the "safety net" nissan left in the timing so just such a thing could occur without detonating the engine to death. If you plan to religiously run premium then a couple degrees shouldn't hurt anything and really will help burn that more efficiently. Safely you should be able to go to 24 degrees BTDC (22 is spec). Any more than that and you may wish to start dyno tuning to see where the power really peaks or falls off so you can accurately guage where the timing does the most good (then when you know you can tell me). Mine is at 23-24, advanced from 21-22 and it's hard to say if it really did much, if nothingelse I think it improved my idle). Remeber to listen for pings. __________________ Steve 93 240sx FB currently very clean and for sale

07-09-2002, 11:14 AM	#4
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (240 2NR @ July 09 2002,12:07)</td></tr><tr><td id="QUOTE">Mine is at 23-34....</td></tr></table><span id='postcolor'> 23-34 eh?  You got VTC, Steve?  You didn't tell me that.  Hehehe.  j/k Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

07-09-2002, 10:45 AM	#2
sxtasy Guest Posts: n/a	Fill up with low octane pump gas, leave your distributor hold down a little loose (so you can just barely turn it) and take it out on the highway and "rod the $h1t out of it <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sly.gif" border="0" valign="absmiddle" alt=':sly:'> " stopping every so often to advance the timing until the engine just starts to ping, then back it off just a touch then run a higher octane fuel (91 or so). There are too many variables to tell you exactly how many degrees advance you can have.....it's pretty much trial and error. -Steve