Has anyone done a dyno before and after resonator delete? I’m guessing for you guys that have done it, the butt dyno probably didn’t reveal any net change good or bad?
As Tob referenced, Dave Pericak stated that the R has a slight HP bump over the non-R, but nothing worth noting. If you happen to be curious about an intake/exhaust/tune setup on a non-R, checkout Youtube channel Obsessed Garage. He did before and after dyno videos. I believe he said he picked up 30 or 40 HP at the wheels. That's a big jump considering the minimal mods.
It's not an apples/apples comparison. There's a string on another forum where a guy did full on apples/apples, as in, mod component, tune, mod component, tune.
What we find is what you'd expect. Most (an overwhelming majority) of the power gains are from the cat delete and the tune. Headers help a little and the CAI is largely snake oil.
Things like long tubes will yield bigger benefits under forced induction, but N/A, the factory shorties aren't all that bad or restrictive for the HP levels and flow rates at the n/a levels involved here.
Bottom line for anyone reading this, if you're gonna do headers or resonator deletes, the impact is going to be small to negligible. You're doing it more for the sound.
I have 2" primaries and Lund actually told me he cans the same tune for 2" vs. 1-7/8" primaries because it's negligible at n/a levels.
If you want to wring out the most power for $ spent, simply throw the cats in the dumpster and get a custom tune (or even better an E-85 tune, which will bump about 20-30hp more).
If you don't insist on having the n-guage, you can probably get a cat delete and a resonator delete done (tastefully) for less than $500 and the tune will cost you around $400 (if you insist on having a shop install it for you). If you want the n-gauge + tune, and you can still find some specials being offered you can get it for around $800.
A resonator delete isn’t going to do anything (HP+) that can be measured on a Dyno. It’s for the sound, not performance. The GT350 is a balanced car. It doesn’t need excessive HP to do it’s job, it takes HP, Handling and well placed tweets to make this car. I’ll take on any ‘Judge’ in a race and beat him on the first turn! Don’t see many Dodges at road course tracks...
Enjoy the car, Balance is key.
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Mine are OTW!
bolts right up after you sawzall it offWhat are you going with? The R assembly or Shifteck?
Also, the Shifteck says “easy bolt on” but don’t you need to cut the resonators out??
People are getting custom cut pipes to delete the resonators. That's why a GT350 with resonator deletes clamped/welded in still don't sound quite the same as the GT350R. The "foreign" pipes and clamps/welds actually attenuate the sound a little bit. If you want the full R sound, get the full R exhaust.
I certainly understand they are very similar aside from the resonators. I do not want to cut my stock system!!! Others do not have a problem with it and that’s fine for them. To my ear, I can tell a difference, however slightly, the cut out resonator delete aftermarket x-pipes and the stock GT350R pipe. Buying this car did not “make sense” to many of my friends, neighbors and family members given how well my previous mustang was set up. But I have always wanted a Shelby since I was little kid back in the late ‘70’s. When I first saw one, I can still remember the feeling of how cool it was and it was a rust bucket getting ready to be restored.
I find it hard to believe that I am the only one wanting to do this. But if I am, then so be it and I’ll take the plunge.