Anyone Running a Larger then OEM Maf Housing?
#26
Release the twins.
The simplest way my brain could solve the problem, and the solution i plan to use.
A. use my scan tool to read the maf of a known good calibration(from any car measuring the same units at the rx8), and having that "control value" datalogged, hook up that MAF up to my modified(4in or whatever) maf housing and have the appropriated screens to straighten airflow, then hooked to use a series of small pc fans to simulate 5 g/s, then a larger fan to push all the way to 600-700 g/s, while observing the Rx-8 sensors voltage. no driving down the road to get a good baseline scale.
b. test at 5g/s... and
10 15 20 25 30 40 50 60 85 100 130 170 215 250 290 350 400 450 500 550 600 650
C. set up timing to retard when the afm scale is out of "good" resolution. ei 215+(which means you'll probably be in boost.
D. test/log/ blow it up.
rinse repeat?
i have notes on the damn thing somewhere with the actual numbers but i think 30-40 is cruise, and anywhere up to 70-80 is where off boost drivability comes from.
MM said just use a cobra MAF btw. then use it's scale.
A. use my scan tool to read the maf of a known good calibration(from any car measuring the same units at the rx8), and having that "control value" datalogged, hook up that MAF up to my modified(4in or whatever) maf housing and have the appropriated screens to straighten airflow, then hooked to use a series of small pc fans to simulate 5 g/s, then a larger fan to push all the way to 600-700 g/s, while observing the Rx-8 sensors voltage. no driving down the road to get a good baseline scale.
b. test at 5g/s... and
10 15 20 25 30 40 50 60 85 100 130 170 215 250 290 350 400 450 500 550 600 650
C. set up timing to retard when the afm scale is out of "good" resolution. ei 215+(which means you'll probably be in boost.
D. test/log/ blow it up.
rinse repeat?
i have notes on the damn thing somewhere with the actual numbers but i think 30-40 is cruise, and anywhere up to 70-80 is where off boost drivability comes from.
MM said just use a cobra MAF btw. then use it's scale.
#27
The simplest way my brain could solve the problem, and the solution i plan to use.
A. use my scan tool to read the maf of a known good calibration(from any car measuring the same units at the rx8), and having that "control value" datalogged, hook up that MAF up to my modified(4in or whatever) maf housing and have the appropriated screens to straighten airflow, then hooked to use a series of small pc fans to simulate 5 g/s, then a larger fan to push all the way to 600-700 g/s, while observing the Rx-8 sensors voltage. no driving down the road to get a good baseline scale.
b. test at 5g/s... and
10 15 20 25 30 40 50 60 85 100 130 170 215 250 290 350 400 450 500 550 600 650
C. set up timing to retard when the afm scale is out of "good" resolution. ei 215+(which means you'll probably be in boost.
D. test/log/ blow it up.
rinse repeat?
i have notes on the damn thing somewhere with the actual numbers but i think 30-40 is cruise, and anywhere up to 70-80 is where off boost drivability comes from.
MM said just use a cobra MAF btw. then use it's scale.
A. use my scan tool to read the maf of a known good calibration(from any car measuring the same units at the rx8), and having that "control value" datalogged, hook up that MAF up to my modified(4in or whatever) maf housing and have the appropriated screens to straighten airflow, then hooked to use a series of small pc fans to simulate 5 g/s, then a larger fan to push all the way to 600-700 g/s, while observing the Rx-8 sensors voltage. no driving down the road to get a good baseline scale.
b. test at 5g/s... and
10 15 20 25 30 40 50 60 85 100 130 170 215 250 290 350 400 450 500 550 600 650
C. set up timing to retard when the afm scale is out of "good" resolution. ei 215+(which means you'll probably be in boost.
D. test/log/ blow it up.
rinse repeat?
i have notes on the damn thing somewhere with the actual numbers but i think 30-40 is cruise, and anywhere up to 70-80 is where off boost drivability comes from.
MM said just use a cobra MAF btw. then use it's scale.
I have heard this cobra maf suggestion before, is there a specific year range?
is the scale easy to get a hold of?
#31
Administrator
#33
Registered
iTrader: (3)
maf is a better system, for a street driven car, but mismatching parts is not something I would want to do on this engine especially. Isnt it unk that the pcm can be adjusted to accept a bigger maf/pipe set up? It would make me very nervous at that power level. besides pcms that use a map system also use IAT and baros to compensate just like a maf system does.
Also please dont tell me that the staged oem intake manifold and the small oem TB would also be used on a 450-500 hp 13Bmsp engine either?
Also please dont tell me that the staged oem intake manifold and the small oem TB would also be used on a 450-500 hp 13Bmsp engine either?
Last edited by olddragger; 09-14-2012 at 09:02 PM.
#34
Release the twins.
or one of these SCT Performance - More Power! Less Fuel!
which means none of those products are good for 600+ on a rotary.
You have to be careful when company rates there product on YOUR estimated hp.
#36
Registered
iTrader: (25)
I already provided a better link that was overlooked
VMP Tuning - Buy Ford SCT & GM Custom Handheld Flash Tuners Performance Economy Towing: VMP 100MM Slot-Style MAF Housing
We already have an 86mm ID, so 90mm is not going to get you much improvement
VMP Tuning - Buy Ford SCT & GM Custom Handheld Flash Tuners Performance Economy Towing: VMP 100MM Slot-Style MAF Housing
We already have an 86mm ID, so 90mm is not going to get you much improvement
#40
Modulated Moderator
iTrader: (3)
I found one that extends the scale out to about 600g/s and I am going to try it and see if I can get it to work without too much drauma. I think it will allow the lower end of the scale to retain the first cell value and then it should be good. If I can get it to work NA..then it should be better in the upper ranges because it will be in a flatter part of the curve than our MAF...that gets very "vertical" in the stuff up top.
Might be a moot point though if I go to an REW....
Might be a moot point though if I go to an REW....
#41
Registered
iTrader: (25)
The PMAS HPX-R will work (already checked out the calibration chart), requires a slot-type MAF bung and maybe an external IAT sensor (looked OK to me just roughly going over it)
http://www.massairdirect.com/
EDIT: Looks like the newer HPX-N2 is even better wrt resolution
http://www.massairdirect.com/
EDIT: Looks like the newer HPX-N2 is even better wrt resolution
Last edited by TeamRX8; 09-17-2012 at 10:38 AM.
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