MAP V.S. MAF in FI engine

[merc-blue]

I have done abit of searching and gather that general a MAP system is the way to go when dealing with forced induction?
Is this correct? at this stage i will be running a MSII V3
Just trying to work out what style of ignition and intake sensor to run.

Cheers
Rohan

[The Real Roadrunner]

the best way to run ANY engine is with a MAF, but its not always practical to do so.

ITBs for instance would be a PITA to setup with a MAF thats why you just run TPS.

and in some cases you cant get a MAF to read as high as needed in an FI application.

id use MAP on an
FI engine as they are fairly stable but it depends on cam specs etc.

cheers
linden

[merc-blue]

Thanks linden.
Ive heard bizzare things about AFM dieing from boost.
the Map seems easyer.

Side note any real advantage of COP vs coilpacks? apart from looking cool/no spark plug wires.

[psychofox]

rohan it depends on what sort of Air flow meter you are describing. The early toyota "flapper" style ones aren't that good, the later ones on the 1ZZ/2ZZs that I think are a hot wire???(I'm sure I will be corrected on this) are more accuate and are much less intrusive to inlet airflow. In any case the AFM shouln't be in a boosted airflow anyway - always have them pre turbo or s/c inlet.

[merc-blue]

I got NFI where i would fit a AFM in a AW11 though. i would have to run a long pipe from the turbs to a AFM and pod. to keep them away from the heat,

Anyonegot a spare 2ZZ hotwire AFM for me ??

[The Real Roadrunner]

depends on which way you look at it.
COP no loss of spark thru leads but coils get hot so may not produce as much spark, as well as reliabilty probs on high horspower engines that get hotter than factory and need more current at higher revs.

coilpacks, loss thru leads but dont get as hot and can be positioned in cool areas in the bay, generally more reliable on track cars depending on what they came with factory.

what engine?

also mafs dont die in FI setups for no reason

1 BOV is definately required
2 plumbing the BOV back PROPERLY is a must
3 make sure the hot wire element in the MAF is cleaned fairly often if used in dusty environments, prevention is better than cure.

cheers
linden

[The Real Roadrunner]

dont bother with the 2zz afm as they wont read the amount of airflow that you require.

what power levels are you chasing and i can give you an idea on what will work.

cheers
linden

[merc-blue]

4AGTE (done properly) will be running a T25.
Car will be run on the road so a proper plumb back will be used, generaly atmo BOVs are for stooges.
will just run the coilpacks. the only reason i was thinkin of the COP was i could fab a freaking cool cam cover with them

[MR22ZZ]

dont bother with the 2zz afm as they wont read the amount of airflow that you require.

what power levels are you chasing and i can give you an idea on what will work.

cheers
linden

Spoken with experience as well

Rohan, the 2ZZ MAF sensor is the same Denso item they use on heaps of newer Toyotas and I think subarus as well. You can pick them up from the wrecker a lot cheaper than you can buy them from Toyota (~$500), just find somewhere that wrecks late model corollas and they will have 100s of them.

Fletcher - yes and 1ZZ/2ZZ uses a hot wire MAF sensor.

But as Linden said, MAP sensor will be better if you are chasing higher boost levels.

[merc-blue]

200RWKW (max)
Im thinking the S13 one would work?

[Mos]

The later 1UZ AFM is also hot wire and is removable so you can install it into a slightly larger pipe if you wanted to. And I might have a surplus one around

Mos.

[merc-blue]

Mos PM me about it

[Draven]

I had a 2jz-gte vvti MAF lying around (similar/same to late 1uz afaik) until a few weeks ago.. that would probably be ideal.

[fixeruperer]

map is just so easy man plug it in and wire it up, and the unit is so small, if its not already in the ecu.

[merc-blue]

i know the ECU has a MAP in it already
I am just reading that i can run a MAP and a MAF.

But MAF calibration curves bassed on flow bench results with intake upto the MAF? getting abit to picky??

Whos got a good/cheap MAF for me to look at?

Need to find EBCs and turbo timers to stack on my dash, and mabye a AFC just o ia hve every little device with flashy lights and beepers.

EBC
turb timer
AFC (ofcourse not plugged in)
Fancy boost gauge
WB02 meter
Hand controller for ECU
racal tach with internal dig and shift light.
get to rice up the interiour!!!
Gonna have flashy lights and beepers everywehre



sorry had a few to many beers before beeer oclock