Originally posted by Mark_Kendrick
OK,ok,ok I'm interested!!!
I'm a geek too. I'm a JD edwards ERP developer and have a BS in comp sci. 0after reading the info in the links and all the posts I'm drooling.
Bear with me...
I gather that the CAN is like ethernet. . a protocol. meaning it specifies the layout of the data in the packets that are basically broadcast on a mini LAN on our truck. . WAY COOL. The can standard specifies max mumber of nodes(30), size of LAN(40m), and baud rate (250kbps). Neat in a geeky kinda way.
--That is exactly the way I interpret it.
The only hard limits here are the 40m and 250k. . the 30 nodes is probably a good networking standard to prevent high collision rates.
I would be that the plug-n-play fuel boxes are bisecting the bus then blocking certain packets and transmitting the rest in a two way set-up. it basically reads both sides and selectively transmitts data from one side to the othher and visa-versa.
--The earlier Diablo Pucks were this interupter type. . now they are a one way unit... . which I think they just modify the signal going to the pump and not going back to the ECM.
While doing this it recalculates the values for the packets that it intercepts, alters them and passes them on. Out pacing the bus is easy when its so slow. Just think how hard it would be to out run a 100mbps connection!!!
The question is do we want to re-flash the ecm or just fool it like the current boxes do? basically the current boxes are a mini ecm that takes over the core functions of the engine and leaves the rest up to the oem ecm ( idiot lights, guages, heater grids etc)
--From what I have gathered the only way yo get some major power from the engine without tapping the pump wire, both the ECM and the VP44 need to be reprogramed with matching fueling maps. If we just reflash the ECM we will be limited to about 320 HP at the flywheel using 275 injectors
Feed me some more info and your own conclusions and lets see if we can't fill in the gaps.
Marco, please gimme a call or drop a note. I have a few questions better not asked or answered here.
--Good luck, he is in it to make money... . he has been a little tight lipped... . but that depnds on the question you ask him. I just want to do it for bragging rights (400 hp with no add on boxes) and personal enrichment