Master pinout/16236757

[robertisaar]

not sure if i would want to use a relay on something that can be this time-critical.

[TGP37]

I'm sure you could use a relay to flip the switches operation.

If the switch is closed, adds voltage to the relay which opens the line. And visa-versa. You could also use two relays to operate from just 1 clutch switch as well.

[ericjon262]

I needed a new clutch switch that offers two open signals when the clutch is depressed, one for clutch anticipate, and one for cruise control. here is what I've found.

1994 camaro Z28 brake light switch

P/n on the back is 10424858

The rear set of four terminals are the ones I need. the front pair, and rear pair both perform as prescribed.

[TGP37]

also, it could be argued that with a perfect tune, you wouldn't need o2 sensors either...

Until 3 years later and the rings are worn some and the tune slides out, then having the O2 pays off. As it's main purpose is to keep the car in tune after it ages....to help keep that perfect tune. though it isn't a perfect solution, it is better then how it was before O2's were used.

Otherwise, blowby and injector wear will wreck havok on the AFR after time.

But yeah, I run open loop most of the time.

I think the more info you have ther better the tune Either way
Its not about guessing its about tuning for the data

Absolutely, and knowing how to filter that data. As a whole, that data is useless until it is broken up into usable chunks.

[unchained01]

I think the more info you have ther better the tune Either way
Its not about guessing its about tuning for the data

[ericjon262]

once you start changing assumed variables(like octane or alcohol content of the fuel, for example), then you would benefit from multiple tunes, but if it's something that can be measured, it can be accounted for.

some of the later PCMS measure the alcohol levels in fuel.

[robertisaar]

once you start changing assumed variables(like octane or alcohol content of the fuel, for example), then you would benefit from multiple tunes, but if it's something that can be measured, it can be accounted for.

[ericjon262]

1 tune should account for whatever temperature variation you might see in a day to day, season to season, even continent to continent difference.... if it doesn't, you have issues somewhere in the calibration.

I was thinking the same thing.

[robertisaar]

1 tune should account for whatever temperature variation you might see in a day to day, season to season, even continent to continent difference.... if it doesn't, you have issues somewhere in the calibration.

[unchained01]

Tunes have to be changed for temp changes IE+seasons or tuned wide enough for deffeerence

[ericjon262]

fuel has to be assumed, temps are all accounted for in the calibration with good sensors...

it's why tuning is part art, part science.

depending on who you ask, science=art.

[robertisaar]

fuel has to be assumed, temps are all accounted for in the calibration with good sensors...

it's why tuning is part art, part science.

[ericjon262]

I wasn't saying perfect tunes existed, merely that saying you don't need a knock sensor if your tune is right, isn't right.

[unchained01]

BUT that's in a perfect world perfect fuel ,perfect temps etc as the story goes....................perfect would be ECT on all Cylinders on a dyno

[robertisaar]

with a perfect tune, no closed loop correction of any kind would ever be needed. fueling, spark, idle, line pressure, any of it.

the entire end-goal of tuning is to eliminate the need for any correction, preferably without sacrificing anything along the way.