Mack Posted May 19, 2006 Share Posted May 19, 2006 well, I found out what was causing my problems. The VB921 must have gone south at some point and then finally crapped out last night and wouldnt even fire the coil. In a fit of rage and desparation, I combed through all the install stuff regarding the GM HEI 4 pin installation. I had a few stock nissan E12-80's laying around and I thought Id give it a whirl. Basically, I kept the stock plug and wiring on top, then I connected pin30 (FIDLE) to where the red wire goes off of the VR under the cap and I connected a wire to ground where the green wire coming off the VR goes under the cap. I have it mounted on the intake manifold for now, because I am running a turbo dist. But, I drove it about 15 miles so far and no hiccups. runs smooth as silk. just an FYI. this should allow people with stock set-ups completely stock FI set-ups to gain ignition control without ANY problems. as long as they have an E12-80. and oh yeah, the tach still works. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted May 19, 2006 Share Posted May 19, 2006 What dwell settings were you running with the VB921? What dwell are you running now with the E12-80? Just wondering if that was a cause of the VB921 frying out. Quote Link to comment Share on other sites More sharing options...
Mack Posted May 19, 2006 Author Share Posted May 19, 2006 fixed duty and a 75% duty cycle. thats probably what did it, eh? what should I be running for the nissan E12-80? this is still a learning experience for me, not TOO costly yet, lol Quote Link to comment Share on other sites More sharing options...
Mack Posted May 24, 2006 Author Share Posted May 24, 2006 just found out some info.... For the E12-80, duty cycle has to be set for 75%, or it will not work. I tried it on "minimum for HEI" and it sputtered from 2000 to 3000rpm. then, I set it on 50% and it ran o.k., but felt like it lacked power and had a LOT of advance at idle. I put a timing light on it and it had 30 degrees at idle and timing would retard to 10 degrees at full advance!!!! so, I set it to 75% and now, I have my 10 degrees at idle and a full 35 degrees where its supposed to be. I've probably put about 100 miles on it at 75% and no signs of burning out. Its operating just as it should. now, even for NA guys, fuel and spark should be no problem. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted May 24, 2006 Share Posted May 24, 2006 Thanks for the update Quote Link to comment Share on other sites More sharing options...
oinojo Posted May 28, 2006 Share Posted May 28, 2006 lets see some pictures:mrgreen:... im a visual person and would like to see how this was done. Thanks Quote Link to comment Share on other sites More sharing options...
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