DIS on a type IV, Well this got me revved up |
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DIS on a type IV, Well this got me revved up |
DNHunt |
Jul 13 2003, 09:30 PM
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
The next incarnation of MegaSquirt, ULTRAMEGASQUIRT is going to have onboard DIS and a driver for the Bosch LS4u wideband 02 sensor. The whole package on 1 board. I can hardly wait. Imagine no more worrying about a dirty dizzy, springs, putting oil on the felt, vacuum advance. Time it once and forget about it (course that one time is gonna be b***h). Run better gas and a hotter chip for the track with a little more advance.
The whole system will use real automotive connectors, no more DB 37 pin connectors. Sounds like the little kid on the block is growing up. Anyone have a crank trigger on their 4? The only spot I can see for one is replacing the spacing washer behind the fan with a machined trigger wheel. It appears that you could mount the sensor off the studs that attach the oil cooler This is gonna be one long winter. I got a s**tload of things to do. Dave |
airsix |
Jul 14 2003, 11:44 AM
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
QUOTE(Brad Roberts @ Jul 14 2003, 09:24 AM) So.. the resolution is "crappy" on these Elcheapo systems ?? B No, the resolution is very high - about 0.4 degrees on a 6 inch wheel. The signal just needs to be held for a sufficient length of time. This is so the ECU can clearly distinguish between signals and noise (interference). Square-wave producing sensors don't need a trigger with a huge radius like sine-wave producing sensors. Unlike a coil & reluctor sensor that produces a low resolution sine wave, the hall effect and optical sensors produce a square wave that is either on or off (whereas the old magnetic sensors had no on/off - just increasing or decreasing signal strength - ie crappy resolution). With the hall sensors the resolution is excellent - however, the accuracy is a function of how precicely the magnets are placed (or the accuracy of the shudder windows if a shudder is used such as in a Vanagan dizzy). -Ben M. |
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