PONTIAC SLP

iTrader: (3)

hi just wondering and can't decide and what's good performance , car is 2001 Trans Am Six speed

Tune with maf or mafless ?

let's see what u think guys


thanks in advance

wilson34

iTrader: (7)

Looks like your running alot of motor, and depending on your cam you may have to run SD to gain driveability in all areas.

I'm about to convert my fathers C6Z06 to mafless due to the GM stage iii cam that has bucking that I can not cure in the 1800-2000rpm range due to the maf.

FirebirdSS

iTrader: (7)

Maf
Pros: More precise in higher rpms. Easier to tune.
Cons: Can become dirty, and Failed Maf is not necessarily common but does happen

Speed Density
Pros: Easier to get engines started with big cams. Sensors do not gum up like a mafs do.
Cons: Not as precise in upper rpm but this does not mean the tune is off, just not as accurate as a properly working maf. Overall it is harder to tune through out the rpm range.

My nuts always swing toward Speed Density, it simplify the engine.

Pulse_GTO

iTrader: (2)

You might have to step up to a 100mm MAF with a 454, you would probably max out the Hz limit on the stock one. Why don't you do a blend tune like it's done from the factory?

BOTTLE ROCKET

iTrader: (4)

Two points of reference are better than one

PONTIAC SLP

iTrader: (3)

hmm thanks guys , i ordered TSP 100mm maf , how that sounds ?

moehorsepower

iTrader: (3)

Mine LTX, 722 RWHP, Stock MAF (De-screened) Forced Inducted. The debate goes on......

Q8-TECH

its mostly personal preference and what your tuner is most comfortable with, they will both get you the same results.

for me most people with big cams i would suggest i give them a mafless tune, and for me i like SD better i feel it has better throttle response

khaotic

iTrader: (2)

Really preferance, it has been debated alot, I run Maf on a big cam 250 duration on intake and 260 on exh. smoth idle stock maf.

James Linder

IF you have a good tune MAF is always better. This is far superior to speed density unless you have a 9 second race only track car. Driving on street with speed density is just and excuse for a bad tune or a tuner who does not know what he is doing.

PONTIAC SLP

iTrader: (3)

thanks again fellas !! , i'll run with TSP 100mm maf

ucanthangwme

iTrader: (12)

Wouldn't it also depend on the weather? I thought if you live somewhere where the weather can rapidly change, it is better to have the MAF. ??

FirebirdSS

iTrader: (7)

Not going to matter since Speed Density uses the temp senor as one of the main inputs.

little_chewy_69

iTrader: (2)

i thought sd tuning eliminates bucking and idle hunting?

joecar

An SD tune that correctly models the engine (including injectors) will be immune to change of weather.

If you're going with a MAF, you still need get both the VE and MAF tables corrected.

Either way, idle tuning is still required.

joecar

There are other aspects that can affect how well or not the MAF functions, things like reversion, resonance and airflow behaviour in the intake plumbing.

Sid447

If anyone drove a properly set-up car either SD-OL or SD-CL they would not make this kind of ill-informed statement.

HSV GTS cars came from the factory with SD tunes.
They ran perfectly with better drivability and throttle response than maf-tuned cars from the same stable.

A properly set up tune is important whether you choose to run SD or a Maf.