speed density vs mass air tunes?

[fordracer2]

i just purchased a fuel injected sbf 89 fox with a procharger 1200br on it i noticed there are no o2 sensors. i am assuming this is a SD tune. it runs a little rich at idle and low speeds but its very responsive and wot is good. one wierd thing though is it still has a pro M mass air meter on the intake track! just thinking should i switch to MAF or just have more streetable SD tune done? any help appreciated this is my first forced induction car im a nitrous guy. lol

[danielhv]

i just purchased a fuel injected sbf 89 fox with a procharger 1200br on it i noticed there are no o2 sensors. i am assuming this is a SD tune. it runs a little rich at idle and low speeds but its very responsive and wot is good. one wierd thing though is it still has a pro M mass air meter on the intake track! just thinking should i switch to MAF or just have more streetable SD tune done? any help appreciated this is my first forced induction car im a nitrous guy. lol

My 87 GT was speed density, and it had O2 sensors...

Is the MAF plugged into anything?

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[BlueCoupeRedVert]

The computer is being forced to run in closed loop without O2s. Probably has a custom tune. Dose it have a chip pluged in the back of the computer?

And bring it out on Thursday to Sonic Dave.

[Diabolic]

What he^^^^^ meant to say was that its in open loop. There is absolutely no need to run open loop w/o oxygen sensors for any reason at all. Look for the original o2 connectors then check for voltage fluctuations. Get some oxygen sensors in there and get a real tune. The gas mileage will most likely improve by a large margin.

[BlueCoupeRedVert]

What he^^^^^ meant to say was that its in open loop. There is absolutely no need to run open loop w/o oxygen sensors for any reason at all. Look for the original o2 connectors then check for voltage fluctuations. Get some oxygen sensors in there and get a real tune. The gas mileage will most likely improve by a large margin.

Sorry "open loop" is what I meant to say. And it is a viable tuning opption to run without O2 sensors. It has been suggested to me with a custom tune.

[Diabolic]

Mileage will suffer.

[fordracer2]

yep. but i didnt get it for fuel mileage. lol found tuner. its a custom tune. it has a big ass pro.m MAF on it that does nothing.lol its a good WOT tune.im doin a couple mods to intercooler plumbing,replacing fuel lines i should be ready for next thurday doug. i have a coupe nitrous car also it should be ready soon just gotta put my PAsuper comp c-4 in it it has a trashed T-5 in it. I talked to brooks gonna try to get on his dyno if it puts up decent #s i wont touch it.