jhdeval
Well-Known Member
I know this question has been asked before but I am curious. What do the different boxes do for the engine? Also what is the best box for a regular driver?
check the mopar performance catalogue to cross reference your normal rpm range the boxes are meant for different ranges so nobody can answer that without know how high you rev your "stock engine"I guess my biggest question is do they offer any benefit to run anything other then the blue/orange box in a stock engine?
i would say either of those boxes would be fine for a stock engine. thats what they were ment for.I guess my biggest question is do they offer any benefit to run anything other then the blue/orange box in a stock engine?
The black box is stock with 5 pins,the four pin boxes are, orange box is high performance for the street, the chrome box is also high performance for high RPMs or the strip. the Gold box is mainly for strip use only.
i think im wrong already but isn't the 5th pin something to do with a/c?? it add more timing to help idle with the compressor loading the motor down??
No, the 5th pin is simply an earlier design
You can NOT tell all 4 pin modules by counting pins. Some 4 pin modules physically have 5 pins
If you have a 5 pin ECU, you MUST use a 4 prong ballast
If you have a 4 pin ECU, you CAN use either 2 or 4 pin ballast
I'm not aware of any documented proof that any Mopar ECUs actually had "rev limiting" built in. I suspect it is more "bad design" of some replacement boxes.
The first Mopar system I ran was bought off a guy RIGHT after it came out "factory" about 73, when I swapped the 340 into my 70RR body. I ran that system for a long time, and don't remember replacing anything, MAYBE a ballast.
Since that box had a long history of dependability, I swapped another spare I had into the car when I sold it, and put the 340 with a mild solid cam into my Landruiser. That engine --in mudholes and on sandhills--routinely saw 7K or more. Stock, black, 5 pin, early, Mopar box. No rev limiting.
Having said all that, the "pile" of Mopar boxes I have are all cheap replacements. I decided to try an HEI conversion module triggered by a stock Mopar breakerless dist because of cost and simplicity.