Do speed density cars run stronger then mass air???

[slayerripkdc]

STOCK vs STOCK do speed density cars run a little bit stronger then mass air cars also how well do they respond to minor bolt on such as larger TB,pulleys, upper and lower intake compared to mass air???????? also do speed density run a little hotter???

 

[BlueDevil95]

speed density cars do tend to be a bit stronger in stock form than mass air cars. minor bolt on's have the same effect, but they go haywire with any major airflow increase like heads, cam or intake.

 

[BelueLX]

there is no major difference. its cheap and easy enough to swap from SD to MAF not to worry about not having a stock MAF car. they both run pretty strong.

 

[Mustang5L5]

You can do heads and intake to SD cars. It's just cam swaps that make it go a little crazy but if you are good you can make those work too.

SD is a more aggressive computer programming. It's a lot leaner than MAF but my engine doesn't really run that hot. It's never gone over 188 degrees.

I have a long healthy list of bolts ons and still run the stock SD setup. No intention of converting until i need to.

 

[fly4spd]

excuse my ignorance but what are you guys talking about when you say speed density?

 

[RacinChris]

excuse my ignorance but what are you guys talking about when you say speed density?

Speed density is what Ford used before mass air. As I understand it, the amount of fuel that gets mixed with air is predetermined based on the engine speed, whereas the MAF actually measures how much air is coming through and determines how much fuel to mix with it based on the measurement.

As for temperature, mine pretty much stays around 188 degrees, too.

 

[87gtconv]

Chris bump that timing up to 14* and you will feel the dif if you run 91 octane!

 

[RacinChris]

Chris bump that timing up to 14* and you will feel the dif if you run 91 octane!

Yeah, I was actually planning on bumping the timing up sometime last week, before going to the track Wednesday night, but didn't get a chance. Think it will make much of a difference in my 1/4 mile time?

 

[87gtconv]

I got about two tenths!! But on streets my motor really feels a lot better. Once you try it you will never go back!!

 

[RacinChris]

I got about two tenths!! But on streets my motor really feels a lot better. Once you try it you will never go back!!

Sweet. So that, along with bringing my 60' time down to about 2.0-2.1, will gain me a total of about 8 tenths of a second. Then if I do a tune-up, I should be right around where I should be for being stock.