What rpm do you idle on your street port?
#26
94 Single Turbo FD
Join Date: May 2006
Location: Calgary, Alberta, Canada
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Monster street-port, idles beautifully @1000rpm with 550/1600 injectors & alluminum flywheel
only pulls about 10 vac. motor is brand new.
trying to find a good tuner, but the idle doesnt concern me. (at least until i read banzai's post)
only pulls about 10 vac. motor is brand new.
trying to find a good tuner, but the idle doesnt concern me. (at least until i read banzai's post)
#27
rotorhead
iTrader: (3)
Arghx, thanks for posting those logs. Come to think of it I've been focused on so many other things on my car, I have to go see if I have the ign idle control enabled or not.
You may want to re-learn idle if you choose to turn it on. Save your map with a DL, reset the PFC, reload the map, and perform the learn procedure. While the idle is learning, log Basic only (in that log, I am logging advance). Then you can get an actual curve of the vacuum reading. Another thing I noticed is that my car will idle more stably with leaner mixtures with the ISC installed. I have all top feed 720/1680 injectors with a Mazda OEM 6 ohm resistor pack. Idle AFR is high 12's low 13's, and I do not use negative lag.
Other engine management systems let you control the entire range of automatic timing advance/retard when their closed loop idle ignition control systems are on. This is a map for an Evo IX on the AEM EMS:
#28
Weird Cat Man
Mine will run acceptably well down to about 750 RPM but it gets slightly more lope-y and is also easier to stall (particularly with my light flywheel).
Just fo the sake of smooth starts and no lope, I have it set for 1000 RPM where it makes about 16 on the vacuum gauge.
I would say my street port is "medium" and I have 550 stock primaries.
Just fo the sake of smooth starts and no lope, I have it set for 1000 RPM where it makes about 16 on the vacuum gauge.
I would say my street port is "medium" and I have 550 stock primaries.
#29
Form follows function
iTrader: (8)
Pineapple large street port, very lumpy @ 750 rpm even when tuned (due to high overlap & exhaust gas dilution of incoming charge). Smooths out noticeably at 800--850 and is very smooth at 850--900+ rpm, once all of the air is moving through the motor/ports in the correct direction.
Mine pulls about 10-->11Hg vacuum at idle, which really isn't that low.... (This is similar to a V8 at idle with a mildly aggressive cam.) More radical ports (and cams, respectively) might only result in 5" Hg, which is again, ok, if you TUNE appropriately for it.
Mine pulls about 10-->11Hg vacuum at idle, which really isn't that low.... (This is similar to a V8 at idle with a mildly aggressive cam.) More radical ports (and cams, respectively) might only result in 5" Hg, which is again, ok, if you TUNE appropriately for it.
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