Anybody running 2 chamber Delta flowmasters?

Pokageek · Feb 22, 2006

Is it less "drone-y?" I am running dynomax super turbos. Since the new heads WOW it got boomy/drone-y-er. The delta flow is supposed to help supress the drone.

Also, does anyone have a good inexpensive source for high-flow cats? Thx.

R.J. · Feb 23, 2006

You would need to go to a 3-chamber to lessen the drone of flowmasters. I have had 3-chambers, american thunders, and original 40 series. Thunders and 40 series drone bad.
Check out www.pypesexhaust.com for a good but cheap catted x-pipe, kit is the cheapest I have found. I bought it and it is good quality, I also passed emissions with it.

GRGT1994 · Feb 23, 2006

I had the delta flow american thunder cat back, and it didn't drone. And that was with all my mods below.

Pokageek · Feb 23, 2006

GRGT1994 said:
I had the delta flow american thunder cat back, and it didn't drone. And that was with all my mods below.

Cool. I believe that is the same muffler as the 40 series DELTA flow.

R.J. · Feb 23, 2006

Yes, American Thunder 40 series are Delta's P/N 942543 and Original 40 series P/N 42543

chefster · Feb 23, 2006

OK ,SO THE OTHER DAY i ASKED WHAT TO USE INSTEAD OF MY 40S AND SOME GUYS DECIDED SUPERTURBOS WOULD BE BEST,NOW YOU ARE DOIN THE OPPOSITE? WE NEEED SOME CLARITY ON THIS.

Pokageek · Feb 23, 2006

First, turn your caps lock off.

The dynomax superturbo is the quietest I have experienced to date and much less annoying BOOM. The difference in my personal situation is ADDing heads to the equasion. It made the car a lot louder. This is exactly what you were told on the other thread. Difference? We are talking Delta-flows. Far as I can tell, there is not a lot of experience with them on this site. The "delta" is supposed to cancel out more BOOM yet still sound real cool like the 40's do. So I am giving them a try and will report back.

Although the super turbos were much less boomy than any other muffler I have tried so far, they also take away a lot of the deep rich sound..

nmcgrawj · Feb 24, 2006

I had the deltas...they did drone, but not as bad as some originals. Also, depends on tail pipes or dumps. Id switch to flows just for the better sound IMO, but then again, id skip flows to go to spintechs.

Caldwell · Feb 24, 2006

Has anyone used Magnaflows?
Since we're talkin about exhausts here...

see, what I hate about puting on mufflers is you need to take off your cats just to really hear the sound.

Do Magnaflows have a drone to them?

nmcgrawj · Feb 24, 2006

Its gonna be tough to find a muffler that doesnt drone with a offroad pipe on it. Some will do it more than others, but i think it will still be there.

Im gonna experiment with this guy's idea from the corral. Basically he welded on a tube on each tail pipe, that was a certain length to cancel out the sound waves...thus eliminating the drone. Takes a little volume away, but i think i'll still have plenty left. Let me see if i can find the link if u guys are interested. This way, u keep your favorite sounding muffler without getting a headache from drone.

Pokageek · Feb 24, 2006

nmcgrawj said:
Its gonna be tough to find a muffler that doesnt drone with a offroad pipe on it. Some will do it more than others, but i think it will still be there.

Im gonna experiment with this guy's idea from the corral. Basically he welded on a tube on each tail pipe, that was a certain length to cancel out the sound waves...thus eliminating the drone. Takes a little volume away, but i think i'll still have plenty left. Let me see if i can find the link if u guys are interested. This way, u keep your favorite sounding muffler without getting a headache from drone.

I heard about this too. Please check back with us on your results.

nmcgrawj · Feb 24, 2006

http://www.corral.net/forums/showthread.php?t=496793&page=2&highlight=weld+resonators

for anyone who is interested. I havent decided if i want to go back to tails....i love the sound of the dumps so im gonna try a couple things to make it a little better first.

HISSIN50 · Feb 24, 2006

Nate, I cant get that link to load. I might be about to paraphrase what was said there.

I dont know how SN95 OEM exhausts were, but for foxes, the mufflers were of unequal length from the factory. This was why OEM systems did not drone.

I have wondered why no aftermarket systems seem to come with two different length mufflers. It might require a manufacturer to put more $$ into the tooling and manufacturing, but with as much as drone bothers some folks, I bet they would pay a little more for a drone-free system.

nmcgrawj · Feb 24, 2006

HISSIN50 said:
Nate, I cant get that link to load. I might be about to paraphrase what was said there.

I dont know how SN95 OEM exhausts were, but for foxes, the mufflers were of unequal length from the factory. This was why OEM systems did not drone.

I have wondered why no aftermarket systems seem to come with two different length mufflers. It might require a manufacturer to put more $$ into the tooling and manufacturing, but with as much as drone bothers some folks, I bet they would pay a little more for a drone-free system.

I didnt know that about OEM mufflers. Makes sense as guys say putting 2 different lengths of aftermarket mufflers on reduces drone...which is something i already have in the works

That thread i linked to is about a guy who welded on 2 26" tubes right after the muffler. He basically made a "T" right after the muffler, right before the tail pipe bends up and over the axel. He put a 26" pipe that had the other end welded shut there. He had did some calculations with rpm, length of the tail pipe, frequnecy, blah blah blah, and figured 36" is best, but he did 26" which worked just fine. Basically, it doesnt hurt flow, it lets the sound waves go into the tubes, hit the end, come back and collide with the others that are coming out of the muffler...killing the drone. He said it worked flawlessly. And there have been a couple other guys who have done it successfully on the corrall too.

But like i said, i love the outside sound of my setup right now...and what i have planned will either sound tons better or like crap. My shortblock will be getting put together next week, im waiting on the heads and cam to come back from ed, then ill have everything together and be able to tell u guys how it worked out.

HISSIN50 · Feb 24, 2006

Nate, thanks for the run-down (I just tried again and it times out before loading. I must be having puter issues). That is kinda interesting - I will try the link again later.

I am tryin to think of what mufflers to put on the 88 GT vert right now, so I was interested to see where this thread went (I really like the full exhaust I have on the 94 [Flowpaths at the end]).

Pokageek · Feb 25, 2006

Ok, results are in. First off, the exhaust sounds wicked and awesome. It is less "drone-y/boomy" but still LOUD with my combo. It is different @ different RPMS. For example, with my 3.55's @ 55-65 it is quiet! After 70mph, the car gets loud. The boom factor is better than the super turbos though but the mufflers are louder in general.

Definitely "different" and definitely quieter than reg 40 series.

Anybody running 2 chamber Delta flowmasters?

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