LDNSTi

What is a MAF less setup? Surely you need the MAF? How do you get around it and what are the benefits?

p1junkie

iTrader: (5)

only benefit is in big hp jobs if running standard car no need to go maf less
is when the maf needs rescaling on big bhp jobs but ecutec seems to cope nicely around 450bhp mark is just at this level a maf failure can be catastrophic

bighead

iTrader: (1)

you replace it with a map sensor instead !!

oh hello Brian (p1junkie).

FMJ

iTrader: (2)

As above you basically fit an after market ECU which uses a MAP sensor instead of a MAF.

Yes the standard MAF can handle reasonable power but they can be unreliable and a bit of a weakness so if you want an after market ECU (which has lots of other benefits) then you may as well go MAF less and get rid of that weakness from the system. It means you don't have to worry about faulty MAF's or replacing them "just in case" on a regular basis. A lot of people end up doing this because you can't always tell a MAF is faulty until it's too late.

Also going MAF'less allows you to mess around with the intake system as MAF's can be ruined by induction alterations (oil on filters, increased vibrations, different pipework lengths and profiles etc).

All in all it's a good thing. But a new ECU is going to set you back £800 with mapping so if your aim is just to get rid of the MAF it's a lot of money to do that. Then again if like some you replace your MAF yearly (probably a bit excessive) then that is less then 8 years of replacement MAF's and you have a nice custom map and a more adaptable ECU.

jura11

iTrader: (7)

Hi there

As above MAFless ECU using instead MAF,MAP sensor with ACT sensor(Air Charge Temperature),which is called as SD(Speed Density)

MAF is great if its works,but MAF have own limits as OE ECU have own limits,yes you can go around with fitting bigger MAF tube or even relocate MAF to FMIC pipework and you can run Blow Through MAF setup,but still you will stuck with OE ECU

Really depends on yours targets and for what car will be used,if car is mostly road car and you will not exceed 400-450bhp and 1.7bar then I would stick with OE ECU

If car is more track based and more orientated for track and drag,then aftermarket ECU is only way,but still as every ECU is good as mapper is good,you can have best ECU on the market,but when mapper don't know how to map the this ECU,you will not enjoy this,due this I would speak with yours mapper first and then you will decide

Main benefit of the aftermarket ECU is more maps,better map resolution,mafless,wideband,aftermarket sensor support and ALS,LC,datalogging,support aftermarket CAN based dashes,displays,NOS control etc.

You will need to ask yourself what you want from the ECU and from the car and from this I would decide

We're went with Syvecs S6 on our first build and this ECU is best and I can highly recommend this ECU to anyone

Jura

The Rig

iTrader: (13)

jumping onto this thread, on a 95 wrx that is now mafless, where is the standard MAP sensor it wil use along with the ACT sensor(Air Charge Temperature),which is called as SD(Speed Density) ??????????

cheers