R34 Gt-t Map Conversion?

[Craney]

Am thinking about converting my R34 gt-t to use a MAP sensor system similar to what the supras use. I have been told that it is a better system able to more accurately know what O2 is going to the engine. I was wondering if this will be worth it as i'm guessing it'll cost a fair bit of cash to do. Plus i plan to have my car professionally tuned with an aftermarket ecu so even if i still run using the air flow meter it should be pretty much spot on anyway.

[The Dan]

This topic has already been covered to great extent. Both systems have their pros and cons....it really comes down to three things at the end of the day....which system do you like?, does it perform the functions you require?, and are your local tuners familiar with it?.

[carl h]

i assume you are refering to the MAP ecu which is popular amongst the supra guys...

it works but it is a piggyback system and not a 'true' stand alone piece, something to consider.

[Warpspeed]

If you are talking about going to a full Autronic or Motec ECU, that would be excellent.

But if it is just some Mickey Mouse piggy back conversion to the standard ECU, forget it.

[paulr33]

map sensor is less accurate

[Warpspeed]

map sensor is less accurate

Oh ? And why is that, please explain further.

[Abo Bob]

It measures pressure not air flow.

[paulr33]

correct it uses pressure to guess how much airflow is present. once you reach target boost pressure doesnt change, therefor guesstimated airflow doesnt change either, despite more air coming into the system.

the net result is that it will shoot across the load axis and won't move up and down any more. which means less load points, its not a big deal but it is not more accurate, less if anything

[carl h]

hooray blowthru maf!