66 coupe, 200 eng., headers, 2" dual exhaust. I put a couple of Delta flow 40's on my car this weenend. They are a little too loud for my liking especially about 2500-3000 under load. Any of you who have used or heard the 40 series deltaflow and the 60 series deltaflow, how do they compare in real life? I've seen the website descriptions.
flowmaster 40 vs. 60
- Thread starter Russ
- Start date
MandarinaRacing
Famous Member
The 60 series is solely for sport compacts, meaning 4 cylinder cars, I used to have one on my Sentra (seriously 
). I would recommend the 50 series.
Alex
). I would recommend the 50 series.Alex
50s still have the flowmaster drone at 2500RPM, but it is more subdued then 40s I have heard. Nice rumble at idle, crazy at WOT. Highway speeds with soundproof mats, can't hear the exhaust inside the car. But around town, they are a little loud for my taste. Maybe my ears are getting older. I'm tempted to put some resonaters on to get rid of the drone. Other then the drone, I love them.
Slade
Slade
Guys, do you have a balance tube or an x-pipe between the header outlets & the mufflers.
Doing that may take some or the offensive noise from the system.
Using the crossover or x-pipe the exhaust see's a larger system & will lessen the note of the exhaust tone. But keep your tube size at 2" for the most pleasing sound & performance. William
Doing that may take some or the offensive noise from the system.
Using the crossover or x-pipe the exhaust see's a larger system & will lessen the note of the exhaust tone. But keep your tube size at 2" for the most pleasing sound & performance. William
MandarinaRacing
Famous Member
Well on bent 8 applications an x-pipe chages the pitch, kinda like 180* headers....kinda. 
Alex
Alex
wsa111, thanks for the balance tube suggestion. I welded a h-pipe into my system and it sure made a difference. My pipes run parallel to each other about one and a half inches apart from the header outlet back to where they separate to the two flowmasters, so my balance tube is only one and a half inches long and although technically an h-pipe it is almost an x-pipe in function. For anyone who is interested it quieted the flows noticeably and decreased the resonance and droning. The tone has lost a little of the bass but still sounds good. Im also going fabricate a very short resonator about six or 8 inches long and weld it in the middle of the tailpipe section and see what it does.
I installed an "X" pipe into my new exhaust. I am running a 351W w/shelby tri-y's into 2 & 1/2" pipes, through the "X" pipe, through "Raptor" performance mufflers, than through 2 & 1/2" tailpipes.
The sound level in the cabin is very low, but at the tail end it is a lot more pronounced.
So I believe that the installation of either an "X" or "H" pipe will not only "equalize" your exhaust but will also tone it down in the cabin.
The sound level in the cabin is very low, but at the tail end it is a lot more pronounced.
So I believe that the installation of either an "X" or "H" pipe will not only "equalize" your exhaust but will also tone it down in the cabin.
