Schiedes dive into speed density

[scheides]

I've been driving my car on speed density now for 4-5 months and after this initial walk-through, I haven't touched the tune *at all*. The car drives awesome, the noted fix works great (#2 IIRC), and I have been just having a blast with the car, how smooth it drives, idles, and accelerates in every every every situation. Speed density has made me fall in love with my evo all over again!

[scheides]

Oh, also, I've converted two buddy's IX's to speed density too, and they have nothign but great stuff to say. More on the way I'm sure

[mullen]

scheides, if dont mind me asking what parts are you running, and did you self tune?

[scheides]

Original tune done by Shane @ DB Performance here in MN. When I converted to speed density I tried to get the AFR/boost/timing nearly identical to how it was then (I have wideband/IAT/MAP logging in teh car). When I returned to the dyno for a check-up, a few minor tweaks of the AFR and it was good to go! So its a colaboration between myself and shane at this point, but when it comes time to make power, he's the one I trust (he has the dyno afterall :P )

Full mod list and dyno numbers from last summer here:
http://forums.evolutionm.net/evo-dyn...-gas-alky.html

Since then I've added SD, SpoolinUp COP, MAP Rev2 Exhaust Manifold, and removed the MAF.

[Dennis F]

Speed density has made me fall in love with my evo all over again!

I want to quote this for the truth.

[scheides]

Haha, somehow iknew that would happen! I don't have a tendancy to go back and edit posts if I change my mind about something, and I doubt I will about this. The car is so much nicer to drive in every aspect I just can't say no.

[mullen]

just read your thread on evom, nice numbers

where did you place your iat? i just saw someone with theres in there intake mainfold...every other one ive seen has been in the ic piping

[eric32]

Speed density is great,.realistically a lot simpler than Mass-Air, but terribly inflexible. After you radically change/improve VE of the engine, the speed density system goes "tilt" because the load/fuel mixture tables are chiseled in stone,..buried in the processor.