SprayNLt1

Just wandering if there was anything to be gained or any major advantages to having a car that see's mostly track duty speed density tuned?

Speedy

The reason people go to it is to get rid of that honeycomb MAF that chokes the intake. With SD you just have a small intake sensor that doesn't obstruct the flow.

96lt1m6

iTrader: (31)

Nothing wrong with the MAF system....

Wicked94Z

iTrader: (26)

nothing wrong with SD either

ThoR294

iTrader: (6)

besides the fact that it guesses how much air is coming in

RamAir95TA

iTrader: (2)

:facepalm:

Wicked94Z

iTrader: (26)

Its amazing that carburetors have lasted this long given that they base fuel delivery off of engine vacuum Oh yea I forgot air can *sometimes* change density at a given temperature

ThoR294

iTrader: (6)

man you guys get all bent out of shape over a sarcastic comment... lol

Wicked94Z

iTrader: (26)

what's your motor combo look like?

ssbowtie1

iTrader: (16)

Its more for forced induction when maf limitations are met and exceeded.


SD is good

Maf is good

Maf and SD is better unless there is a reason that causes the maf to reach its limits.

wrd1972

iTrader: (12)

From what I have seen, all other things being equal, the SD will make a fraction more power.

myltwon

iTrader: (1)

what he said

FASTFATBOY

iTrader: (23)

Speed density or Alpha N tune with a cammed or built engine belongs in one place....on a racecar.

Low speed/part throttle is not NEAR as good as a MAF system.

SprayNLt1

Thanks for the replies the setup is its a 388 with ported lt4 stuff uptop with a solid roller and a 200 shot the car went a 6.60 through eighth with 4.10 gears and a 28'' tire as a six speed but kept having some issues with mass air the car is down right now we are removing some weight and swapping to a braked th400 when i get my converter i was gonna have a shop go over the tune again i was just wandering if sd was something to look into the car only sees about 200 miles a year of street driving mostly its just a track toy

06blackGTO

iTrader: (20)

I beg to differ. Im sd on my goat, and my cc306 h/c/i 93' ta is sd of course.
and I have no low speed/part throttle issues. I can lug my goat around around 1200 rpm's thru town w/no bucking, surging. And the throttle response is great in both cars.That's just my experience,opinion.

White97z28

There are no advantages...

Tuners who only tune in SD do so because they can't figure out how to get the drivability and idle right on a MAF car.

Wicked94Z

iTrader: (26)

depends on the overlap and reversion IMO, its on a car by car basis and probably as you mentioned a tuner by tuner basis. My old H/C combo with the CC306 ran GREAT with a MAF, my new combo didn't do so well with all of the overlap.

FASTFATBOY

iTrader: (23)

You probably have whats called a "hybrid" tune.

GreenbeanZ28

The advantage is to be able to run straight TB with nothing in front of it and getting rid of the elbow. It will make more power.

06blackGTO

iTrader: (20)

Maybe only tuners who do that, but I know to me taking out the maf/elbow would be the best way to go.With a good tuner.which is in my case, Dlove who is a sponsor on here,and he prefer to tune cars SD. Case in point, my goat.