MAP sensor theory

[richy]

if you elongate the TDC sensor bracket holes and allow it to move 2.65mm each way you can advance/retard ign by 1 degree

also unplugging the knock sensor gives 3 degree of retardation

[105epwr]

the ecu is about 250-300...i'll check tommorow.

its an all round better solution than a half plugged in OE unit!

ok mate cheers let me no.
just been thinking do you reckon its worth trying another rollong road?
i see in a mag once they took 1 car to many different rollers and every rolling was different even up to 50bhp!!!!

[richy]

if you elongate the TDC sensor bracket holes and allow it to move 2.65mm each way you can advance/retard ign by 1 degree

also unplugging the knock sensor gives 3 degree of retardation

i should say thats out of the clio cup manual! i havent personally tryed that!

[stan]

the ecu is about 250-300...i'll check tommorow.

its an all round better solution than a half plugged in OE unit!

ok mate cheers let me no.
just been thinking do you reckon its worth trying another rollong road?
i see in a mag once they took 1 car to many different rollers and every rolling was different even up to 50bhp!!!!

yes thats worth trying...

i wouldnt count on that making a whole lot of difference....

[105epwr]

[quote="richy"]if you elongate the TDC sensor bracket holes and allow it to move 2.65mm each way you can advance/retard ign by 1 degree

also unplugging the knock sensor gives 3 degree of retardation[/quote
Thats handy to no!cheers

[Scougar]

Stan should help clear this up.

I thought MAF was airflow based, whilst MAP was RPM based? MAF (i.e. an AFM) only measures air going into the engine and then adds the correct amount of fuel based on air intake, MAP simply determines the correct amount of air and fuel needed for a given RPM?

MAF is found on most OEM cars for safety, where as MAP is commony used for aftermarket applications where precise mapping is done to make it safe.

Stan, please correct where necessary

Matthew

[stan]

MAF is used on some cars, MAP is used on some cars. Both allow for refined load measuring.
A MAF sensor os different to an airlfow meter, like you find on old Bosch J-jet systems...they use a "flap" and resistor set-up to physicaly relate to flow. A MAF sensor uses a heated element, and mesures the cooling effect on the element to relate to airflow.

Typically you DONT use a MAP sensor on an aftermarket ecu on an NA engine.