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510rob

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About 510rob

  • Birthday 01/09/1973

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  1. Mr. Derek, I'm speechless. It's so awesome to see pictures of cool "home made" stuff, and so interesting to read about how you made it. Nice work! I am in awe.
  2. 510rob

    cussing

    why hasn't someone banned this user yet? ... he just pissed all over the board with the worst word I've seen in a while. DON'T TALK S**T ABOUT TOTAL!!!
  3. Knowing what Nissan are like, I'd assume the ignitor is the exact same part on the 26DETT as the 25DET (and probably the 20DETs and VG30s and who knows what else!) If the pict-o-gram drawings of the coils shown in the factory diagram are accurate, the coils have an isolated secondary (not an autotransformer), and the transformer secondaries (grounds) are brought out to the three pin connectors, summed together in the sub-harness, then terminated at the cast aluminum cage that the coils are bolted to. The rb25det I 'squirted used a V3.0 Motherboard with an MS1 chip running the 029v variant of the extra code. I used the three LED outputs to drive pseudo wasted spark, with the coils paired as doubles (three twins). If you want to run true six coil ignition, you have to use MS1/E code, and even then, you can't use the knock sensor input. For this particular install, the knock sensor was moderately high priority (street car on pump gas), so I decided to use 3 coil trigger outputs, and six VB921s...
  4. Pete, I set up an MS system on an RB25DET for a friend, and I used the stock COP coils, controlled by six VB921 chips. The stock COP coils have a three wire connector interface and do not contain anything more than the boring old coils of wire wrapped around an iron core assembly. The factory wiring diagram for the motor I modified shows an external ignitor box used to fire the coils, and that ignitor was certainly in my hands when I cut the wires off it's connector. I hated cutting perfectly good parts off, but it was done in the interest of neatness because the ignitor usually sits at the back end of the valve cover (and apparently "it looks ugly"). The COP coil primary connections are as follows: * primary supply * primary "ground" (I use the term "ground" loosely in this case) * secondary ground All six of the secondary grounds are tied together in the COP sub-harness, and terminate at a ring terminal attached to one of the bolts retaining the coil cage to the head. Seems rather stupid to separate the grounds, then tie them all together a few inches away, but I'd be the last one to question the reasons for it because I was able to make the motor work fine using that sub-harness. All six of the primary powers are tied together as well. The six primary low-side terminals (primary "ground" for each coil) are separated as you'd expect. Cylinder 1 (output1) = B/R Cylinder 5 (output2) = R/Y Cylinder 3 (output3) = R Cylinder 6 (output4) = R/L Cylinder 2 (output5) = R/W Cylinder 4 (output6) = R/G +12V Power Supply = W IGN Coil Ground (A-69) = B There is also a remote-mounted condensor capacitor on the stock ignition setup. It was quite small, and I had a spare 100uF 400V capacitor lying around so for good measure, I threw that big capacitor into my wiring, connected as close to the coils as electrically possible. All of that gibberish aside, I know there are at least two styles of coils used on the RB25DET motors, and both of the two COP coils I've had in my hands have used a similar three pin primary connector. I wouldn't be at all surprised if the later RB25 NEO engine use some COP assembly with internally-integrated electronic controls, as this seems to be the way most companies went in that era. I see that Delphi are now making COP coils with integrated ion-sensing mechanisms. I can't wait for the trickle-down of that technology!
  5. why bother with EDIS at all? Use a few IGBTs or VB921s to run the stock COP coils, knock the gap down to 0.030" or less, and you're good to go!
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