Slant 6 HEI
hi there friends I have used HEI systems on my projects. i am looking for any thoughts on a 1 piece HEI (coil in the cap) for my 70 Duster 225 project. have seen a lot of discussion out there on different types, but do not want to run a separate coil. anyone try this recently with current suppliers that generated a good result ? thank you for any thoughts !
I am brand new here, David Ray, owner, tech, developer and tech, DAVE's small-body HEI's. This IS NOT AN AD, it is simply info.
I worked for Zora Arkus-Duntov in Skunk Works for a few years, engine design developer. and was lent to the group that designed and developed the large, coil in cap HEI's to help develop them.
About 42 years ago, I designed and now build my own version of the GM module HEI. One factor on the coil in cap HEI is the coils are severely problem prone, they start to fail, and take module after module out as they slowly fail. That is what you get with an epoxy filled coil, problems. If you know someone that has a large coil in cap HEI, and has module failure issues, change the coil, i is on the way out, slowly. Round remote oil filled coil is the only way to go, mounted upright, not on its side.
I do MOPAR conversions a bit differently, I build one of these, MSD Trigger Only, small-body real HEI, EFI-HEI with 8 pin GM HEI modules, EFI-HEI for Sniper/FiTech EFI. The Ford/MSD pickup is a lot more stable than a MOPAR pickup, but the stock pickups do work, to a point.
I have done a lot of Direct Connection conversions, swapping in a Ford/MSD magnetic pickup, and changing the mounting plate to move concentric with the reluctor, so signal strength is not compromised, as it is with the less effective MOPAR pickups that change gap as they move past the reluctor pole centers from eccentric movement.
ALL conversions are done to stock point and MOPAR electronic cores, NONE of them use an in cap coil, and all parts are stocked at local parts stores, like O'Reilly's. The real HEI's use the 4 pin GM HEI modules, the EFI-HEI uses the GM 8 pin modules, straight off the parts shelves. During a conversion, I completely rebuild the distributor and curve it, as part of the conversion.
Decades ago, I did one for my own Hyper-Pak, 4 speed Slant 6 in my Duster.The worst problem with the stock distributor is the plastic gear, they fail. I understand there are new design, new materials gears available, they should help immensely.
As I said THIS IS NOT AN AD, just saying hello, and that I am well aware of the one real HEI conversion available. And, the drop-in points replacements, are not HEI, they have NO dwell extenders and do not make any more spark energy than a stock set of points, no matter the input voltage to the module and coil, nor the coil used.
