twin TD04 project

[Gamesy]

i was thinking of doing a twin TD04 project on the svx, my only issue is the maf sensor.

currently i'm running ECUtune 2v4f(iir) setup.
looking into this people use a speed density setup to remove the maf all together,

has anyone done this on an svx?

[Crazy_pilot]

I haven't heard of anyone running speed density on an SVX. Maybe on one of those insane drag builds on a swapped Impreza. The Hydra uses MAP (manifold absolute pressure) sensor, which also does away with the MAF and opens up the HP restriction.

Another option is to have a single air filter, MAF, and then a y-pipe to the turbo inlets if you have the space available (I don't know what layout you're thinking of).

Good luck!

[icingdeath88]

Originally Posted by Crazy_pilot

I haven't heard of anyone running speed density on an SVX. Maybe on one of those insane drag builds on a swapped Impreza. The Hydra uses MAP (manifold absolute pressure) sensor, which also does away with the MAF and opens up the HP restriction.

Another option is to have a single air filter, MAF, and then a y-pipe to the turbo inlets if you have the space available (I don't know what layout you're thinking of).

Good luck!

MAP = speed density. Basically, the density part of the equation comes from the pressure/MAP, and the speed part comes from the engine speed and displacement. More advanced explanation here: http://www.megamanual.com/v22manual/mfuel.htm

You're probably thinking of alpha-n.

[Crazy_pilot]

Well how about that... My understanding of speed density was that it's based on intake air temperature and an engine load/airflow table.

Please forgive my ignorance.

[icingdeath88]

Originally Posted by Crazy_pilot

Well how about that... My understanding of speed density was that it's based on intake air temperature and an engine load/airflow table.

Please forgive my ignorance.

Yea that sounds like alpha-n. Basically in alpha-n, the airflow is determined from just the TPS and the engine speed/displacement. In fact, there was an SVX running in alpha-n, dynomatt's rally car, with the megasquirt 2.

[BackWoodsBob]

td04's are cheap as dirt. still want to see where this thread goes.