MAP vs MAF

[GiJOr33]

Reading through a few threads has got me wondering...

I've read that MAF is more accurate than MAP, so why have MAP at all? what application of car setup/tuning would a MAP sensor be better than an air flow meter?

I have a HKS VPC on my car at the moment, and am debating if i should go back to an Air flow meter (MAF) and get a Power FC to tune it, or get the car tuned with the HKS VPC and a Power FC. (I have a HKS FCONV in my car and no one to tune it.)

So yeah... any experience/opinions/facts/examples would be good. As i really have no idea what the differences are, and i'm sure there are plent of other people out there who don't know either!

Thanks

Andrew

[MegaGTS4]

It's a give and take on the MAP vs. MAF. MAF is much easier to tune with forced induction (and cams)...but MAP(Manifold Absolute Pressure sensor) is slightly more accurate at higher HP levels and with the added bonus of being able to mount the air filter to the turbo or leave the turbo exposed like so many high HP drag cars.

I would keep the HKS VPC and get the power FC!This is just my opinion though!!

(sad, that the Fcon-v has to go! Cause Fcon-v and VPC are widely used in drag cars in japan)

MEGA

[GiJOr33]

Yeah... well i'm not going for huge HP levels, around 300rwkw is about what i'm aiming at. I don't want to have to start strengthening gear boxes and diffs just yet. Maybe sell the VPC and Fcon setup to someone in Sydney who can go to BD4's... and i'll then get a Power FC and Infinity V44 air flow meter (a little bigger than Z32). Yeah it is a shame, cos i've heard the FCONV is an excellent computer if you can tune it!

Andrew

[ed]

I got this from Mario (GTR.700)

Basically, to sum things up, AFM is the better method of airflow

measurement, but MAP is less restrictive to flow.

In short, for all out full throttle applications, such as drag and/or

circuit racing - MAP would be the best due to less complexity and

restriction.

AFM is better, as it is more capable of metering airflow and can adapt to changes in atmospheric conditions very well, and provides much greater resolution for transient throttle response, so on a daily driven road car, it would be the best.

[judd]

just get the PFC Pro...therefor u wont need to go a buy AFM, but then again do u have someone to tune the PFC Pro.

[GiJOr33]

yeah thanks for that... it's not so much as "not needing to buy an afm" it's more which one is better for my application. I can always keep the VPC and just get a Power FC and have them tuned together. But if an Air Flow Meter is going to be better then i'll go that path!