t_cel_t

i ------- know what it means but when is it doing?

from my chemistry skills the only thing i can come up with is that the extra oxygen in the chamber is super hot and just wants to oxidize anything it can hit.
like how steel will rust slowly at room temp but if start tig welding without a sheilding gas it oxidizes like instantly.

dont tell me about 14.7:1 or ---- cuz i know that.
dont tell me to google it becuase every other *** out there has only 1 thing to say and that is what it is, not what is happening.

Inquisition

Your question makes no sense and is in the wrong forum.

MustangC.

when it runs lean it starts to detonate

89shithatch

wrong mixture of air and fuel caused premature combustion. which is detonation. too much air and not nough fuel.

kain

this is the full answer.

when ruining super lean, you create more heat in the combustion chamber. this extra heat ignites the fuel before the spark plug does and... boom.

ifly87

You're question is worded poorly, and I dont think you will get an answer here. We are just a bunch of poor people that mangle together cheap turbo kits.

JoshMO

Beat me to it. I agree with kain here.

t_cel_t

well its just that ive seen what happens to pistons when a motor goes lean and it like a hole is burned right through it. the hole is smooth almost like it is gradual.
but then ive seen pistons that were like totally cracked to hell with bent rods.
i just thought something else was happening

Slo_crx1

The one's you saw with smooth holes burned in them were from running too lean without detonation (yes, it's possible). It acts like a blowtorch when you keep adding oxygen to the acetaline mix. The one's you saw that were cracked and broken were from detonation (could be caused from running lean or too much timing advance too). With them it's basically the mixture igniting too early as the piston is on it's up stroke, sort of like hitting it with a big hammer really hard while the piston is in motion coming up instead of where you want it on the downstroke.

brettsb16a2

A lean mixture can also just cause a misfire and no detonation in vacuum with a light load or no load