I think it had something to do with the coil used. mom not completely sure though.
I think it had something to do with the coil used. mom not completely sure though.
View attachment 1715477629 View attachment 1715477630 View attachment 1715477631 All right. Here are the pictures of the gold box I have. I thought there was a part number on it. There isn't. But I did research the best sink on it, and I believe this is the 1980's gold race box.
I also know this was used on a street/strip car. I also know I've personally tested it, and it's only losing 1 degree across 10,000 RPM. I also ran it to 12k and it didn't lose any more.
IMO, even this box is usable for a street/strip car. Regardless of what Chrylser said at the time.
The 534 ECU, .25 Ballast, less the T-drive dist and wiring (in use) that came in my distributor kit back in the '80s. The 306 coil was a separate purchase from kit.............
View attachment 1715476301View attachment 1715476305
....So where saying there is a difference in operation between the two exact same part numbers other then a P on a stamp ?
I'm thinking they are the same. But to answer this definitively one would need to be the design engineer. For all I know the "P" prefix possibly sold as the stand alone over the counter and mine is the package version. Could also signal a change in who manufactured it or a revision of it.
The take I have has to do with the combination of parts used. The "race" combination (coil, resistor, ECU as a team) for higher output likely causes the ECU to heat more so extended run time may take a toll on the ECU life.
Race coil P3690560 is the same as Accel 140306I wish I could find the coil that came with it. The distributor and box were together. So my guess is my cousin sold it.
Also, I posted pictures of the rocker shafts in the other thread.
What did you find out ?? what ended up working for you long term... the orange or chrome box?The ECU spec chart I copied to this thread was submitted by @halifaxhops in another thread. Unquestionably a knowledgeable guy. I was surprised to see that there were several types of “Chrome Boxes” listed there. Only one recommended as suitable for street applications (Chrome/Blue NO fins).
So I gathered that one has to be careful about the generic term “Chrome Box”. I do like the chrome case but apparently there is more to it than just pretty. So I checked out my chrome spare. Turned out to be the Chrome/Black P4120534 (racing applications).
@yellow rose has one he has tested. His comment is above in this thread and does prove the spec to be accurate.
I’ll be buying a standard street use application ECU to replace my spare.
If anyone chimes in that is happily (long term?) using a P4120534 ECU in their street driven car I would appreciate knowing what the coil/ballast combination being used is.
Thanks to all who have commented.
I never did install it. The selling price of the "534" ECU has risen dramatically in the last couple of years. $250 ++ today. It's sitting on the shelf. It's an investment! LOL!What did you find out ?? what ended up working for you long term... the orange or chrome box?
Yep good investment I should have picked up a couple of spares back in the days to have..I never did install it. The selling price of the "534" ECU has risen dramatically in the last couple of years. $250 ++ today. It's sitting on the shelf. It's an investment! LOL!