Speed Density VS MAF

88-GT · Nov 14, 2004

Well I think just about everyone on here has a different opinion about the two sytems, I always thought that MAF was just plain better, but now from some of the things I have read it almost seems that Speed Density isnt that bad . My own car is a Speed Density so maybe sumone could clear this up for me. Thnx

Adam

HISSIN50 · Nov 14, 2004

the more you search, the more you find.
stock for stock, SD is a little faster/more powerful. but once mods get heavy (esp cams with diminished vac), MAF is more adaptable on its own.

Daggar · Nov 14, 2004

Your best course of action is going to be to not worry about it until you get to the point where it becomes an issue. If you're thinking of swapping over to MAF just for the sake of doing it then you're wasting your time and money. If you plan on swapping to cam that has lots ov overlap then it'll probably worth it to change to MAF. With no other changes to your combo other than MAF, you will likely end up with less power than what you started with due to the restriction and turbulance of the mass air meter. Probably not the answer you were looking for but there's more to your question than just "what's the best".

slo65 · Nov 14, 2004

SD rules! go idle surge!

jerry beach · Nov 14, 2004

I was at a Mopar show last week and I was looking at a 98 Viper. I happened to notice the lack of MAF sensors on the air intake tubes. So I guess the viper is SD, seems to work.

Daggar, I was reading you sig and it says "SD (+30 HP)". I was just curious as to how you calculate that?

88 GT, nice time. My stock SD car should do that with traction. I see your tires, but what are you running for rear suspension? I have been dreaming of a 2.0 short time, my best is 2.32 that 1.8 seems so out of reach.

Daggar · Nov 14, 2004

jerry beach said:
Daggar, I was reading you sig and it says "SD (+30 HP)". I was just curious as to how you calculate that?

Jerry... That's the estimate of loss I'd have with my current combo (specifically my Kenne Bell) if I were to convert to mass air as given by Bob Kennedy at Kennedy's Dynotune. He actually refused to sell me a MAF conversion for my combo and showed me dyno numbers for several cars who's only change was MAF from SD. Instead of converting, we went with a custom chip. The numbers varied from car to car based on what their combos were and 30 HP was about the average.

jerry beach · Nov 14, 2004

Thats pretty cool. The chip prolly cost less than the conversion+ labor anyway. He seems like a pretty honest guy to deal with. My guess is that he isnt in FL. Thats OK, there are good shops down the street from me in Orlando when and if I get the cash to build mine up like that.

slo65 · Nov 14, 2004

jerry beach said:
88 GT, nice time. My stock SD car should do that with traction. I see your tires, but what are you running for rear suspension? I have been dreaming of a 2.0 short time, my best is 2.32 that 1.8 seems so out of reach.

if you're talking to me.. i'm not sure u are, but yea i have 255/60/15 bfg t/a's they're nice cheap tires and i got a good deal on them, yeah i cant hookup at all with my peg leg rear, i'm gettin in gears within the next couple of weeks after that we'll see, maybe onto d/r's i'm hoping for low 9's after gears, still on street tires, i guess we'll see what happens, right now i'm spinning like crazy, hence my terrible 60'

slo65 · Nov 14, 2004

again not sure you're talking to me, but rear suspension is all stock, cars stock besides the flowmaster muffler, pullies, k&n

87'GTstang · Nov 14, 2004

slo65 said:
SD rules! go idle surge!

LOL God I get tired of that.

slo65 · Nov 14, 2004

87'GTstang said:
LOL God I get tired of that.

haha yea dont we all i've been battling idle demons since i got my car

5.0Droptop · Nov 14, 2004

my sd combo never surged. I have had more trouble with surge on my maf combo but i fixed it.

Daggar · Nov 14, 2004

5.0Droptop said:
my sd combo never surged. I have had more trouble with surge on my maf combo but i fixed it.

Me either. Only time I get idle surge is when the car is cold and the defroster is on.

87'GTstang · Nov 15, 2004

Daggar said:
Me either. Only time I get idle surge is when the car is cold and the defroster is on.

Then your IAC or something related to it isn't fully doing its job to compensate for the load.

Speed Density VS MAF

88-GT

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