Stunr: New engine management installed!! w/ vids
Hey guys,
i don't usually fill anyone in (cept a select few i spose) when i have an up and coming modification.
typically you guys hear about it after its installed with me typing a few breif lines about it ad posting a few pics. :wink:
This time i'm going to let you know ahead of time my intentions, this will help involve you on my projects, and perhaps help me to keep from putting them off for soooo long.
Saturday i'm installing my Speed density converion. For those of you who don't know, speed density is a digital method of calculating airflow.
instead of actually measuring the air coming into the engine( with your mas) this setup takes the fixed volume of the engine(displacement) and using density and temperature, you can calculate how much air is in the engine per rev.
the upside: no more mas. you can honestly run the car with nothing but a throttle body, and it will operate flawlessly. yep, i can strap a piece of screen over my throttle and drive to florida and back with great mileage.
also since everything is calculated based on manifold pressure, you can vent the bov properly with no ill effects, also boost leaks no longer throw off the tune.
of course with no mas, you get better throttle response, quicker spool(and louder spool you ricer)
the downside: volumetric efficiency.
simple mods can throw off the tune, cams, a new air filter, headers, etc..... they all effect how efficient the engine is at pullin in air at different rpms, so it means more tuning,
the fuel system i am running is fully adjustable,
timing, soft and hard v.e., fuel enrichment, injector size, launch rpm, rev limiter etc etc.
all within the stock ecu and completely run on wideband o2 inputs(open loop and closed)
aside from all the tech babble,
this is going to be something no other 7g has done, and only a handful of dsm guys have tried.
I'll be expecting around 32-36 mpg on the highway with the lean burn code,
and be running as much as 25 psi every single day.
so basically i just had a GM intake air temp sensor welded into my upper charge pipe today, and i have already plumbed my gm 3 bar map sensor.
:idea: so saturday morning when i run the wire from my wideband to the ecu, i will install my ostrich eprom emulator and flash the ecu to run full on speed density,
i'll then load a basemap(to get running) then take it to the streets and start w/ the tuning. :!:
i'll try to keep you guys updated,
and count on seeing one less ugly instrument in my engine bay shots from now on :wink: