Posts by Dezmo
1 - 6 of 18 Posts
Joined
·
306 Posts
did the kit say 13:1 on the box or is that what you measured it at? 
all I can say is youre lucky...really good gas (not everything that comes out of a pump marked 93 is actually 93 octane) or the kit is slightly less than 13:1 or something....just because it works for you doesnt mean it will work for anybody.
all I can say is youre lucky...really good gas (not everything that comes out of a pump marked 93 is actually 93 octane) or the kit is slightly less than 13:1 or something....just because it works for you doesnt mean it will work for anybody.
Joined
·
306 Posts
Vince I really dont feel up to the typing so try this:
http://auto.howstuffworks.com/question90.htm
they put it better than I could have
http://auto.howstuffworks.com/question90.htm
they put it better than I could have
Joined
·
306 Posts
uhhh rjp: the octane rating on the pump is an average of the RON and MON numbers....look close at one and the small print says something like 'R+M/2 method'
and please explain to me how combustion chamber shape allows low(er) octane fuels to not detonate under high compression...this I gotta hear :roll:
btw I never said anything over 12:1 will detonate, I just used that as a rule of thumb.
and please explain to me how combustion chamber shape allows low(er) octane fuels to not detonate under high compression...this I gotta hear :roll:
btw I never said anything over 12:1 will detonate, I just used that as a rule of thumb.
Joined
·
306 Posts
if you do have so much experience building motors, then you should be well aware that compression-induced detonation and preignition caused by a hot part in the combustion chamber are 2 totally different things.
Having a smooth combustion chamber does nothing to 'help' higher compression....as to the 'angles and edges' you talk about.....most everything uses smooth, flowing shaped not prone to hot spots that can cause pre-ignnition....if you do get a carbon deposit or something thats glowing and causing pre-ignition, the compression ratio wont do a thing to help it, its just gonna pre-ignite no matter what. If you could just smooth out the chamber and run super high compression, why dont we have superbikes with 15:1 ratios?
I'm not calling you an idiot, but you obviously need some help with the differences between pre-ignition and detonation. And I've been building bike motors for 10 years now, with many race winners using motors I built. As to the smoke and mirrors, I dunno where you got that from as everything I have said is fact.
Having a smooth combustion chamber does nothing to 'help' higher compression....as to the 'angles and edges' you talk about.....most everything uses smooth, flowing shaped not prone to hot spots that can cause pre-ignnition....if you do get a carbon deposit or something thats glowing and causing pre-ignition, the compression ratio wont do a thing to help it, its just gonna pre-ignite no matter what. If you could just smooth out the chamber and run super high compression, why dont we have superbikes with 15:1 ratios?
I'm not calling you an idiot, but you obviously need some help with the differences between pre-ignition and detonation. And I've been building bike motors for 10 years now, with many race winners using motors I built. As to the smoke and mirrors, I dunno where you got that from as everything I have said is fact.
Joined
·
306 Posts
pissing contest? I'm just stating facts...sorry if that bothers you.
as to your ama championships...you said "i have ama,afm#1 winners with my chassie and suspension" ok, thats great...I'm truly happy for you....now whats that got to do with motors? :roll:
also "I'll see you at the track" ok, if that didnt invovle a 3000 mile trip I'd take you up on that....as if you beating me would make you right . :roll:
as to your ama championships...you said "i have ama,afm#1 winners with my chassie and suspension" ok, thats great...I'm truly happy for you....now whats that got to do with motors? :roll:
also "I'll see you at the track" ok, if that didnt invovle a 3000 mile trip I'd take you up on that....as if you beating me would make you right . :roll:
1 - 6 of 18 Posts
