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Thanks for tightening that up.
I have a 1979 and a 1980 - K Jetronic.
I'm focused on a loud exhaust note and not focused on HP gains but i definitely don't want to lose any - low end torque is more important more so than high end torque.
I think the set up i want is:
-H straight pipes
-muffler delete
-cat delete
-megaflow muffler
To your thoughts if you can kindly comment on:
-needing a resonator to keep "back pressure"
-ECU adjustments required
K-Jet / CIS doesn't have an ECU. There's an adjustment screw on the fuel distributor to add / subtract fuel and you simply turn the ignition distributor to add / subtract timing.
After your upgrades are all finished, IMO it's worth the money to find a tuning shop, strap it to a dyno and dial things in for air / fuel and find the happiest base ignition timing.
I know you said no to headers, but the SS manifolds from the 85/86 32V are a worthwhile upgrade for these cars as a cheap alternative.
Here's a comparison that might interest you. The 81 and 79 are my cars. Notice how the 79's low end torque is actually higher than the 86 with a completely free flowing, backpressure free exhaust.
The 79 & 81 also have different camshafts (stock for their model years).
There are technically 3 different variations of "OB" and I can speak from personal experience, each one can have it's own unique exhaust sound. If you want to compare apples to apples, need to know if your car is L-Jet, CIS, or LH.
In the thread I mention we all talk about early 80s and euro cars, I also have example pictures of my system in there. I thought k-jet and euro was obvious but point taken, I have edited my earlier reply for clarity...