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4 inch intake..!

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Old Sep 10, 2011, 05:27 AM
  #16  
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^it stands for speed density. Basically you have a sensor that takes the temp of the air, with a map sensor that measures pressure in the intake manifold, compared to a maf, which meters air going through the honey combs, which is heated
https://www.evolutionm.net/forums/ma...w-through.html

Last edited by galantman03; Sep 10, 2011 at 05:36 AM.
Old Sep 10, 2011, 08:00 AM
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Originally Posted by galantman03
^it stands for speed density. Basically you have a sensor that takes the temp of the air, with a map sensor that measures pressure in the intake manifold, compared to a maf, which meters air going through the honey combs, which is heated
https://www.evolutionm.net/forums/ma...w-through.html
does speed density work with a stock ecu?
Old Sep 10, 2011, 08:03 AM
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and im having problems with stalling, when i release the gas sometimes the car stalls and with the a/c on it does that every time,should i just up the rpms which is a 1000 at idle to 1200 or do i have to do something else to tackle the stalling issue?
Old Sep 10, 2011, 08:23 AM
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SD will work on the stock ECU, and it will fix your low idle problems.
It will smooth it out and the great thing about SD, is that if you blow a IC pipe off your car won't die.
Old Sep 10, 2011, 08:41 AM
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Originally Posted by evo2nv79
SD will work on the stock ECU, and it will fix your low idle problems.
It will smooth it out and the great thing about SD, is that if you blow a IC pipe off your car won't die.
wow you just sold me!..who has the best SD kit?

and still can anyone help me with my idle problems?
Old Sep 10, 2011, 08:56 AM
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SD is speed density. You remove the maf and use a 4bar sensor and air temp sensor to measure air intake. Some people also use the fuel temp sensor instead of an air temp sensor.
Old Sep 10, 2011, 09:05 AM
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Originally Posted by babaz7
and im having problems with stalling, when i release the gas sometimes the car stalls and with the a/c on it does that every time,should i just up the rpms which is a 1000 at idle to 1200 or do i have to do something else to tackle the stalling issue?
Yep, speed density will work on Stock ECU. 95% of the evo community that is on SD is using the stock ecu

You will prob have to go into your idle tables under ISCV ac on and idle rpm off drive.

Mikey
Old Sep 10, 2011, 09:05 AM
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How simple is it to do the conversion (finding a map sensor and adjusting the ecu)?
Also would I have to retune the car?
Old Sep 10, 2011, 05:49 PM
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Originally Posted by PaperClip
How simple is it to do the conversion (finding a map sensor and adjusting the ecu)?
Also would I have to retune the car?
Yes you would need a retune
Old Sep 10, 2011, 05:52 PM
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The silicone coupler on my 3.5" intake rubs my tranny a bit. I would assume a 4" ones even more. Anyone confirm?
Old Sep 10, 2011, 05:57 PM
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Originally Posted by boostedwrx
The silicone coupler on my 3.5" intake rubs my tranny a bit. I would assume a 4" ones even more. Anyone confirm?
I don't have a problem on my car with the 5speed... Do you have like a 10ply coupler? lol

The 4" is close to the tranny but not touching.

Mikey
Old Sep 10, 2011, 05:58 PM
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Originally Posted by boostedwrx
The silicone coupler on my 3.5" intake rubs my tranny a bit. I would assume a 4" ones even more. Anyone confirm?
I dont have that problem with my 3.5" intake
Old Sep 10, 2011, 06:59 PM
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Could be a 6-speed thing too. Thanks for the input guys! And LOL @ Mikey.. na its just a 3-ply actually, kinda puny. I'll know how it fits on a 5-speed when I get enough saved for one
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