348 Plenum Redesign

What would be cool for the obd2 crowd or even the 348 guys would be a motec and female plugs to match the Bosch males that go int the stock ECU. So you unplg the stock ECU plug in the motec to the stock harness. Pay all the games you want and plug in the stock ECU for the biannual smog check.

 

Thought the same thing then my head exploded. Parallel ignitions like those good old nascar boys do but a complete management system. See you in a week LOL


Or use a stock ECU (nont connected to the engine) leave the OBD port and put a terminator with correct values just to trick the machine that the car "cycle ready"

Hmm I get it can even be done without the ecu with just line voltages??????

Going to have to read the signals on the OBD one day on a junk car for the same year to see whats there

 

I think the reason no one has used the piggyback fuel controller is that it won't work. PBFC work by tricking MAF settings or injector duty cycles. I doubt that there is enough headroom in the OEM injectors or the MAF to tell the ECU to do more. And if you put in bigger injectors they may negatively effect driveability when you are not wide open throttle. I could be wrong and hope so. I'm thinking if you do a PBFC it needs to act like an old school CIS warm-up fuel injector and spray a mixture just down stream of the MAF. The question then would be if the 348 intake manifold can flow a "wet" mixture.

 

Well in that conversation what I suggested, was not actually a 'piggy back' but a completely independent ECU and injectors to manage the extra fuel only at those peak limits and remain off during the rest of the RPM range. But in general I really don't see a real need for it, on an otherwise stock 'base engine' 348. I have yet to see anyone 'truly' running out of fuel. As in:

Making quite a bit more HP than before, then at that point, begin to go 'lean' at at the top of the RPM range. Simply going lean and making less HP than before, is a calibration issue and not because the fuel system is not capable of keeping up.

The few times I have seen a 'mandatory' need for more fuel, was because of forced induction. IMO there are still many 'other' things on the 348 that need to be optimized, long before having any big concern of .... 'running out of fuel' ...

 

Some CAN BUS hacking can go a long way, some energetic folks are doing some really cool stuff. Hook your CAN interface module and start logging. We can copy Cambus and do things similar to an SD

Possibilities are endless but for us with this simple ECU we replicate a stand alone OBD port that is self contained so when "read" will give the necessary info to pass the "test"
Our era system only needs a few things to pass unlike the newer cars that send VIN etc to the system.
Engine light off, ready cycle complete, power, rpm, speed. I am not 100% sure on speed or it thats off the dyno. an OBD terminator if you will.
Now you can run a "well hidden" stand alone engine management system

Then a long as a sniffer test passes were good to go every 2 years


Endless possibilities if we think different from the past ways.

 

Yes, that is a great idea .......... though as you have mentioned, a suitable harness or cable interface seems to be the 'disconnect' in this conceptual idea ....... no pun intended ...

 

Standalone is definitely the way to go, obviously the Motec units are excellent but the price is a little ridiculous especially considering all of the options the base unit does NOT come with, making you pay a premium for all the extras, no thanks.

My current plan is to run a Vipec on my 348 turbo project, should have her up and running next spring. Just not sure if I'll try to retrofit some of the existing harness to come with with a PnP solution for you guys or just start from scratch...

 

Mental gymnastics aside I'm still real big on nitrous oxide for streetcars. 99.9% of the time you run within the normal envelope of the car. That 0.1% of the time you want some quickness you are breaking the law in just a few seconds so Nitrous is prefect. Under 1000 bucks for the best system and dial in 100-150 safe horsepower and smoke some 360's

 

hehehe, so do we in our own special child way LOL


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Wow Tim you have been holding out on us. When to we get a tour?

 

Hair dryers and laughing gas? Your a mad man Tim.

 

Were just get silly at the preschool LOL