Yeah, I got fed up with the whole deal and pulled it on my El Camino...They say if you get running right (ccc) its as good as fuel injection (great throttle response and fuel mileage)..
the problem i ran into is certainly the timing curve on the Olds ECM. I could swap chips and or computers, add egr But theres no resource I can find that documents the curves of fuel and timing in the chips. I need that info to move forward in a logical way. trying unknown chips is a shot in the dark method that i dont like. I even contacted a guy who burns custom chips and he told me to get rid of the CCC. LOL needless to say he didnt get my business. He missed the point. anyhow the points setup is in the car now with a modded Qjet and no CCC. Runs great. kind of boring but runs great. Built TH350 and just today I installed 2.73 gears to replace the 2.41s With the little little tires on 14" rims it should be somewhat sporty without needing an overdrive. I will revisit the CCC 350 on my test stand most likely.
Sounds like you are having fun getting old school but new at the time, electronics to work better than before. I like your thinking, keep stabbing at it and I think you will get it working like a champ. Besides how many other people are experts with that system. At the time I had the 83 Riv that stuff was all new then and hard to figure out. I had a 83 Riv with the small olds engine and it had the electronic Q-Jet on it. I went and washed the motor and it killed the throttle position sensor. It took me forever to figure out how to bypass that and get the check engine light to go off but I lost 4 mpg when that happened 18-14 Then I got the carb fixed and rebuilt and only gained back 2 mpg to 16.
I'm thinking a computer and chip from a like-era CCC chevy 350 might work out better? Might have a better timing curve. Did chevy even use the CCC on a 350? Possibly caddie. I would try for a chip for a bigger engine. Sound like a fun project and yah never know, in 20 years from now, collectors may pay you big bucks to make their car run right...
I would never argue with anyone that wants to pay me big bucks hehheh Ill tell you though, it seems most people into the Gbodies etc are dumping the CCC. Maybe youre right it needs time for those cars to become more "classic" to where people want to keep them to be more original
UPDATE: Swapping prom chips into the Olds ECM didnt work at all, so I swapped out the entire 86 Olds 307 CCC system for a Chevy 305 CCC system It must have less timing at part throttle programmed in because the backfiring is no more. Idles, revs and runs great in P. I havent driven it yet. I have some tuning to do, but the CCC SBB lives! More later.....I will probably start another thread for the test n tune and results
To close out this thread.... Once I swapped in the 305 CCC system I got driveability. So I went to tune the Olds carb. Well the dwell wouldnt lean out via adjustable air bleed or mix screw. I tried everything I could to lean out the Olds carb idle mix to no avail. So I swapped on a Chevy Monte SS E4ME figuring that they have MUCH larger air bleeds and much more idle air bypass than the Olds carb. Sure enough that got the idle system tuneable on the 6cyl dwell scale. on the money. So now I had a tuneable E4ME CCC system on a SBB 350 that ran and drove great. Cold starts were a breeze, great idle, and nice power in the secondaries... So the real question I had was, how is the gas mileage with the CCC system compared to non CCC? Well this is where I got a bit stumped. The CCC Buick 350 was getting about 12mpg. I expected more like 16 or something. I have "heard" of Chevy guys who swap a 350 in place of their 305 and get 18mpg.....though I have "heard" a lot of things people say....and theyre not always accurate. Theoretically though- with the O2 sensor sniffing the mix and the computer inputs MAP, BARO, TPS etc....I dont see why it isnt better mpg. The additional cubic inches of air ahould be corrected for when the O2 sensor smells the lean exhaust and riches the mix up. If it were too much for the ECM to adjust for, then it should pop a trouble code which it did not. So thats the end of this CCC experiment. The SBB350 is destined for another try at the Single Turbo setup, this time in the engine compartment of the 83 Olds. In the meantime I will be thinking about the CCC system and why the MPG in this case sucks.
No the ECM is not flashable. It takes a plug-in PROM chip. A custom PROM would be the right answer I believe for max mpg. It is hard to find information on the timing and fuel curves in the OEM PROM. Theres lots of readers and chip programmers available on ebay that might work.....
I know this is old thread (I actually found thought a google search) but to post just for reference. I have a 87 regal 307 olds bone stock 2004r with 2.51 gears with the functional ccc sytem it would get 22 mpg at 70mpg highway speeds. That was back in 2003. For your issue with the timing and no egr. I think the common solution to that is to run an 1987 and later computer and use the chip that GM used to provide with the fast burn 350 crate engine. Since it had vortec style heads is no longer had egr. Eventually i want to run the same thing you tried with the ccc. And as a follow up i also want to try to turbo the sbb (that would probably be FI). Great minds think alike.
Thanks for bumping this thread. I have run across another fellow, this time who had a chevy350 in place of a 305, who had the exact same result as me. Horrible mpg like it was in a default mode or power ode all the time. He claimed to have a brother who did the same swap that worked, and he was getting 18mpg with a SBC350 in place of a 305. I will revisit this eventually. In the meantime I am running a 78 turbo6 231 (carbed) in my 83 cutlass. Learning the ropes of the draw thru system. This is in preparation for a possible run at a SBB 350 converted to a draw thru setup. I will turbo the 350 again! It is on a stand in the garage right now awaiting its next reincarnation.
Needed to keep the 231 shaft for the correct oil pump drive, so had to swap the v8 wheel from the 307 shaft to the 231 shaft. I seem to remember its a press fit. pickup coil is an ez swap, I seem to remember small retaining rings holding it in place. once reassembling it, I had to do a test spin or two to so I could adjust out any interference between the parts. used the 231 housing and dist gear. I still have it. heres a pic:
