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Resonator Delete (non-R models)
Posted 17 July 2016 - 01:35 PM
If I was in the my favorite exhaust shop now, I would do it in a heart beat!. The only concern is the performance difference. If the stock resonators have a smooth perforated core ( not pimpled-as used by Magnaflow to reduce rasp at the sacrifice of some flow) and are of the same ID as the exhaust piping fore and aft, they would actually flow better than a straight pipe. This has been repeatedly been proven (the common theory being that their is less exhaust drag surface with perforations than with solid pipe). If they are smooth perforated cores and, together with other non-exhaust mods, high three seconds 0-60 would be more easily obtained. The GT 350 is so close to 4.0 seconds already. Of Course, If were serious about improving performance through exhaust mods, I would get a .5 inch larger OD or ID cat back exhaust, but then The GT's wonderful
basic exhaust symphony would change and probably for the worse. All in all, IMO, deleting the resonators would make for a super Shelby GT sound for maybe a little less performance. For street use, that would be the way to go.
Posted 01 August 2016 - 01:04 PM
The X pipe should benefit the NA motor for scavenging/ flow at the higher rpm range. Both the R and non R have it. Easy to spot by peeking underneath without have to lift it. If you like the best flow-wise resonator delete arrangement and sacrifice some (can't tell you how much) of the Ford tuned R sound , I would replace the X pipe so that the straight pipe coming out of does not 'neck down' as it does in both versions. There is a slightly smaller pipe inserting into the X pipe then it inserts back into a the slightly wider resonator or straight pipe (as with the R). This neck down contributes to the pop open sound when the throttle is mashed. So you can slip and weld a transition or widened out lip straight pipe over that narrower section of pipe and sound just like the R, or remove the X pipe and start fresh with a straight pipe coming off the X pipe, sleeving over it, then sleeving back down over the rest of the piping, or for best flow, connecting the new X pipe and the rest of the piping with a piece of same consistent diameter piping.
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