Vito Knock is the warning bell limit has been reached. A/F ratio should be easy to tune for power, richened a little for reliability per Tuners experience. Timing should be advanced until knock detected, then backed off 1,2,3 degrees ( varies, again experienced tuners call) for safety. T28 will be maxed out flow wise, intake temps will raise, all signs will point to reaching limits off efficiency as boost is raised and car tuned. Experienced tuner will recognize signs and stop pushing hot air.
Simply have it tuned by professional, for most efficient power. Leave the rest to tuner. I suspect the 1.6 will put out great power and serve reliably. There is no hard number anybody can give, have it tuned. Then let us know what was achieved. Ivica Sent from my iPhone On Jul 27, 2010, at 10:42 PM, [email protected] wrote: > I was under the impression that by specifying which kit it supposedly > was, that would include which turbocharger I am running. Perhaps that > is a flawed assumption, I don't know that much about the flyin miata > kits of the past. > > All I'm looking for is a ballpark figure where things get dicey for the > bottom end, now that I'm running enough octane that the knock sensor > isn't going nuts well before I approach any conrod limits these things > matter. > > I saw in the FM Link manual stuff like: > > There are limits to the amount of ignition advance run on a stock bottom end. > In the 400 row > the timing should not be set more advanced than the timing in the 300 row, > and the timing at > torque peak for turbo cars should not exceed 88 (22 degrees). In the 500 and > 600 rows on > turbo cars, each having less timing than the previous, the timing at torque > peak should not > exceed 80 (20 degrees). Exceeding these values can put too much pressure in > the combustion > chamber for the stock rods and pistons to handle, causing a failure. We are > currently pushing > this limit on supercharged cars (less backpressure), and a limit has yet to > be determined. For > N/A cars, ignition advance at torque peak in row 6 is usually good around 108 > (27 degrees). > > Does this still hold true or have we learned more about the 1.6l stock limits > since this manual was written? > > Regards, > Vito Caputo > > > On Tue, Jul 27, 2010 at 09:27:57PM -0700, Jeff Abrams wrote: >> I can???t help but chuckle whenever I see people use ???limit??? and >> unqualified ???boost??? in the same sentence. Then again, these are often >> the same people that believe that detonation is somehow directly tied to >> manifold pressure. >> >> ???Boost??? is a symptom, not a cause. >> >> Hopefully, Corky will chime in here about flow. >> >> >> >> - Jeff Abrams >> >> - [email protected] >> >> - www.mazdamaniac.com >> >> >> >> >> >> >> >> From: [email protected] [mailto:[email protected]] >> Sent: Tuesday, July 27, 2010 9:02 PM >> To: MataPowerList >> Subject: RE: Stock 1.6l w/FM2 kit, mechanical limits with regard to boost >> and advance? >> >> >> >> i been following this since Christ was a corporal, and a properly tuned >> 15psi has always been the safe limit that I have heard of. on a 1.6 thats >> about 220rwhp. >> >> >> >> these normally durable engines are very unforgiving of detonation under >> boost. >> >> >> >> a set of low comp pistons and better rods really pays off if you can sustain >> the cost of those and a rebuild. >> >> >> >> >> >> >>> On Jul 27, 2010 [email protected] wrote: >>>> My question is what are the safe limits of boost and ignition advance >>>> one can run when there's enough octane to not knock? When do the rods >>>> and/or pistons give up on the stock 1.6l? >>> >>> The general feeling seems to be that once you start exceeding 250 rwhp >>> (at stock rev limit) you should worry about the life of your rods. >>> >>> Not sure about pistons -- most failures of those that I've seen on the >>> net seem to be head/detonation-related, rather than power. >>> >>> --Ian >>> _______________________________________________ >> >> >> > >> _______________________________________________ >> Miatapower mailing list >> [email protected] >> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
