ive just started tuning some motors and they have turned out great. Now, what is the deciding factors in what kinda ignition timing at certain rpms. theres gotta be a better way then just dyno tuning till you get it. I mean, you can degree cams to try to come close to the cams settings, so theres gotta be someway to know where to start and add/subtract timing other than trial and error. Is there a typical number that these engines like to see??? where i can work off of? maybe cam specs are a big deciding factor? So far ive been working off stock maps and just adding a little timing in the last three columns, and it seems to be3 working out great so far but by far NOT maxing out potential. I have 93 octane available at the pumps, so maybe we can push the envelope a little??

Im not askng for anyone to share there secrets, but just aim a brother in the right direction to successful tuning and happy engines.

 

timing needs to be dialed in on the dyno. basically advance it slowly till you detonate or drop off in power. then back it off a deg or two, and leave it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eddiebx &raquo;</TD></TR><TR><TD CLASS="quote">timing needs to be dialed in on the dyno. basically advance it slowly till you detonate or drop off in power. then back it off a deg or two, and leave it.</TD></TR></TABLE>

This is incorrect You would not want to advance ignition timing until detonation occured. In most cases: You would want to advance ignition timing until the vehicle stopped gaining power, then you would back off from that point by 1-2 degrees for safety purposes etc.

 

thanks for the reply's. Is there a certain advancement that i could go buy till i get to the dyno. I mean, are you finding that most motors like a certain X amount of timing? whats the most you would ever feel comfertable advancing and with what grade fuel???

 

Sorry to impose...................Similar subject

I had my car tuned on 112 for the track, and I am going to run 93 ever so often. I was thinking of adding a little fuel from the SAFC and then retarding ignition timing a couple degrees. Then I would be fine I think......right!