Life without ISC. What's it like?
12-02-2010, 01:14 AM
#21
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The Hydra actually can pull or add timing to control the idle. It is just a 2d map though without tuneability like PID.
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12-02-2010, 01:20 AM
#22
Question: How do older carbeurated engines hold an idle? How does my 1978 BMW control its idle without an ECU and with shitty mechanical injection?
Answer: Controlled vac leak via the idle screw.
The reason you and so many other people have issues controlling your idle is poor tuning and setup. Period. (or maybe a failing/failed valve)
For some of us, a simpler system is better. I don't necessarily support running ENTIRELY without one due to hard starts, but it is in no way retarded to run without one. My car would maintain a steady 800-900rpm idle 100% of the time. I adjusted it ~2times/year to compensate for the weather. Other than that, no issues.
(I'm just kidding about the skullfuck-till-you-die thing
.....I'd kill you first)
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12-02-2010, 02:42 AM
#24
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Cool, now you need to remove the electronic fuel injection and the electronic ignition as well, carbs and dizzys are the new EFI. Cars in the 20s didn't have EFI, so why the **** do you need it now?
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12-02-2010, 03:10 AM
#25
Ultimately, ISCs are a LUXURY ITEM in the grand scheme of things.Are they absolutely essential to a vehicle's operation (under normal circumstances)?
NO
If properly tuned will they aid cold-starts and provide a nice smooth idle?
YES
Can they cause havoc when improperly set-up and/or fail?
**** YES
So to all of those out there on the bandwagon, please, aside from the obvious point of shitty starting that I've pointed out already -> Tell me why you think an idle speed controller is such a ******* necessity.
Please. I'm totally serious. Lay it out for me in simple terms as to why you need them so badly.
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12-02-2010, 04:29 AM
#27
Cpt. Slow
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Mine takes about 1/2 mile even in 34 degree weather to keep a steady idle and never die. It's lower than a warm idle, but it's an idle. It's certainly not stalling in that first 1/4-1/2 mile. And that's when I hit my first intersection leaving my street, so it really never stalls.
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12-02-2010, 04:36 AM
#28
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I leave down town, so that's not an option. Car is parked in the (busy) street, parallel parking, etc. First intersection is within 50 feet from my house. You can imagine the joy.
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12-02-2010, 08:21 AM
#31
Boost Czar
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I've run without the idle valve... I much prefer with it. Especially since I have a street car and I use the a/c a lot. Once I spent the man hours to acutally tune my idle settings it's now better than stock.
However, with that being said, I've driven plenty of miatas without them and so long as you keep the idle around 1000-1100 it's fine.
However, with that being said, I've driven plenty of miatas without them and so long as you keep the idle around 1000-1100 it's fine.
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12-02-2010, 11:55 AM
#40
I've retuned the idle valve settings multiple times following the MS3 closed loop instructions and it still occurs.
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