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 > _______________________________________________
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