The paradigm for transverse V8's is to use a dual 4-2-1 header into a collector, which is the cat in the Northstar but could be a resonator.
Innovation and unfettered imagination is the key here. Someone did try it with their Northstar engine and it made significant power gains like in the +75 hp range. So far, I have not heard of anyone overcoming that limitation other than run a custom cross over pipe underneath the car.
#Walker vs. magnaflow cat free
You can go as free flowing as you want but that cross over pipe will always be the choking point. The choking point on our Cadillacs is the cross over pipe. Yes you're right that what applies to the Taurus doesn't apply to our Cadillacs. Just thought I would throw in my (expensive) experience. coming off the line.Īs I said at the beginning. Still wasn't as strong in the first second or second and a half. It was a LOT better after the computer relearn. I (of course) had not kept the old resonator.Īt his suggestion, went thru MULTIPLE battery dis-connects before getting the computer to go into RELEARN mode. I had to PAY to have a resonator put on it to kill the DRONE. It would SCREAM at high RPM but was a TOTAL DOG at lower RPM. It wouldn't really PULL till it passed 4000 RPM. Not even if you held the brake, gassed it and then let off the brake. It wouldn't even CHIRP the tires on slick asphault. It also had NO TORQUE at lower RPM's and I do mean NO TORQUE. It had a drone, but I thought (at first) that it was live with it. THIS ONE is only THREE LITRE." 165 cubes NOT 425Īfter it was done, I started home with it. "I" was thinking about what would work GOOD on a 6 to 8 litre engine. What I failed to take into consideration was, He tried to talk me out of it and almost refused to do it the way I wanted it done. There would be almost NO BACK PRESSURE and the computer wouldn't like it and it would probably have a bad DRONE at certain RPM's. He told me that was WAY TOO BIG of an exhaust system for that engine.
#Walker vs. magnaflow cat install
Install a HIGH FLOW cat with dual outlets and 2 1/2 inch pipe all the way back to dual mufflers mounted at the rear by the bumper. then about 2 inch (maybe 1 3/4) to the single muffler. both lead off pipes (2inch) come to a single cat. I have known the owner for several years. The shop I took it to is well known in this area for high quality work. In the fall of 2002, I decided to put duals on it. This happened on a Ford Taurus, so it may not apply to Cadillacs at all. I will have to disagree SLIGHTLY with this, with qualifications. Yes, some back pressure is needed but I don't think there is anyway to have too little back pressure with just simply a muffler replacement or possibly even an exhaust system.
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