Drunken Hamster
Turncoat Ford Boi
- Joined
- Jul 18, 2017
- Posts
- 1,910
- Reaction score
- 357
- Location
- South Carolina
- Ram Year
- was 2005
- Engine
- was 5.7 Hemi
it is a 2.75" outlet from the Y though
Alrighty.
Anyway, if your curious, and, if this is anywhere close to accurate, this is the calculator I use to determine pipe diameter for exhaust. http://www.mk5cortinaestate.co.uk/calculator5.php
You can input pipe diameter and number of pipes to get the HP it's good for, or the HP and number of pipes to get the diameter you need. I'm wild guessing you're around 400HP with a tune and headers, so, technically, your main pipes [including the header collector] are too big, while your Y collector pipe is too small.
Yes, it's very noobish to do it this way, but I don't have any experience building exhaust or racing engines, so it's the best I've got to go by. Do what you will. It doesn't seem like you're going to or are willing to change your pipe diameter, so anything more I say on the subject is kinda moot.
However, if you find the no-muffler route isn't enough [even if only after some time] then all I could consider more besides fine-tuning piping diameter would be to make true duals that go "collector extension, cutout, cats, pipes, mufflers, pipes" to have a quiet mode and a 'literally as loud as it could be' mode.
Or just add cutouts before your cats for loud mode and only keep the cats and pipes for emissions testing. Or you could add a quieter muffler at the end for quiet mode without going true duals and all.
****, I'm doing it again. I'll shut up now. Damn hamster wheel is just too easy to turn.... :/

All that's left for you are gears and cam, haha. 

