Ive heard from some sources that a 307sbo intake will fit a 350 sbo. If so, then by using that intake with the computer carb and the ecm from the 307 will result in increased mpg, correct? I promise, no more dumb questions...lol.
just for kicks.....will this work?
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bill said:
I believe it is the intake from 85 or 86 and earlier that will fit a 350. I believe the best one to use is the A4 intake. Using the computer may improve mpg, but it won't be much. People have done it, but you need to make sure you have a factory service manual with all the diagrams to make sure everything is hooked up correctly. You may need to play with the carb since the engine is bigger.
dan2286 said:
Dan is right it is the A4 intake from the 307 that will fit on a 350. These are the intakes from 85 and earlier non roller cam 307's. My question is why use the computer? It really probably wont help all that much. I agree with Stomis, get yourself an over drive trans, and some higher gears for the rear end. Im running a .030 over 350 Olds (look in my signature for details), 200-4R trans, and 3.73 gears and I knock down damn close to 20 mpg if not a little more on the highway. Thats with a lockup converter, no computer control on the engine what so ever, and the car can still get out of its own way in a hurry.
Many people have adapted the CCC system to 350, 403, and even 455 motors. Usually this was done to retain emissions inspection compliance (yes, technically the swap is illegal but it would be the rare inspection tech who could tell a 455 from a 307). The was a guy named Kevin Wong on the old Chubecto Olds Listserver who adapted the CCC system to a 455 and ended up burning a new PROM to optimize performance.
The biggest problem with the CCC system is that you can't alter the timing curve without burning a new PROM. One thing for certain is that the 307 timing curve will NOT be correct for a different engine. Also, you don't need the 307 intake to make the CCC system work on a different engine since the CCC Qjet bolts to any Olds Qjet intake. As noted, the A4 intake will bolt to any earlier SBO as a weight savings, but it has no performance benefit.
The biggest problem with the CCC system is that you can't alter the timing curve without burning a new PROM. One thing for certain is that the 307 timing curve will NOT be correct for a different engine. Also, you don't need the 307 intake to make the CCC system work on a different engine since the CCC Qjet bolts to any Olds Qjet intake. As noted, the A4 intake will bolt to any earlier SBO as a weight savings, but it has no performance benefit.
joe_padavano said:
Agreed, it would be easier to optimize performance with a non CCC qjet and vacuum advance distributor. If you wanted a little more performance and retain emissions you could run an edelbrock performer intake (although I've read its not much better than a factory intake) it has provisions for the hot air choke and egr.
Thanks Fellas for the opinions and info....as always....the amount of knowledge on this forum is priceless!
So...I will probably stay with my original plan and use the th350 for now. But, if I do run across a 2004r or a 700r4, I may get it just so I can always have that option in the future. I really dont want to use the ccc because I dont like comp controlled carbs for the simple fact that they seem to be poorly designed and rarely economical. But I also want the motor swap to look fairly stock and clean. I intend to drive this car often and take some trips with it, so I want it to get some good mpg if possible, which I know will be difficult given the motor size and the overwhelming urges to punch it sometimes. I am hoping with high octane gas, the 2:42 open gear and the torque it has, she will cruise without much effort and keep my wallet from running empty...lol
Thanks again!
Bill
So...I will probably stay with my original plan and use the th350 for now. But, if I do run across a 2004r or a 700r4, I may get it just so I can always have that option in the future. I really dont want to use the ccc because I dont like comp controlled carbs for the simple fact that they seem to be poorly designed and rarely economical. But I also want the motor swap to look fairly stock and clean. I intend to drive this car often and take some trips with it, so I want it to get some good mpg if possible, which I know will be difficult given the motor size and the overwhelming urges to punch it sometimes. I am hoping with high octane gas, the 2:42 open gear and the torque it has, she will cruise without much effort and keep my wallet from running empty...lol
Thanks again!
Bill
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