usnfenix

iTrader: (11)

quick question related to a similar thread, does the flowmaster merge provide any gains over a traditional ORY like the bbk long tube and ORY i currently have? i heard through some research that its a smoother transition or whatnot and provides some gains. looking for any evidence.

HCI2000SS

iTrader: (2)

I think it certainly did over my Pacesetter ORY.

Kingc8r

iTrader: (21)

Pat G's Ta that made 500hp through a y pipe exhaust showed that having a better merge transition definitely helps....

z28SSilvest

Also sounds so much better than the crappy merge you get with most Y pipes..

Siciliano15

iTrader: (7)

when i had my macs, i replaced the mac merge with a flowmaster one and it made a big difference in power. most noticeable on the highway at passing other cars. also sounded better too. I recently went to duals though so if you plan to do your exhaust id be selling my whole mac setup.

JRENIGAR

iTrader: (37)

Any gains over the new TSP or Speed Engineering oryp merges?

Full-Force

iTrader: (11)

Im gonna say yes because the FM merge has 2 options when using 3" pipe. They make a 3.5 merge and a 4" merge. Both designs are considerably larger than a 3" merge.

Its all about that bottleneck and the higher you go in power the more bottleneck you are gonna have with the 3"merge

jimmyblue

iTrader: (11)

The gain is purely from eliminating badness in whatever
merge you had.

I've seen craptastic merges from Jet-Hot and the old
style multisegment TSP ORY. Just terrible, you can see
just by inspection how one side wants to throw some
reversion up the other collector branch on the Jet-Hot
and both of them had the pipe-T-into-pipe construction
with about a half an inch of stick-in for some sweet
turbulence and dog-whistle action.

On the other hand my silly little SLP ORY has a nice
merge quite similar to the Flowmaster, as do some of
the better header systems for our cars.

If you replace great with great, gain = 0. What what
you've got looks like, is the question that matters.

luigiandme

iTrader: (2)

The flowmaster is a TRUE merge as opposed to the various y-pipes sold in the long tube kits that is simply one 3" tube that damn near Tee's into the other 3" tube.

01ssreda4

iTrader: (96)

I gots me one of these beauties:

JRENIGAR

iTrader: (37)

And I bet that beauty makes some power too.

RevGTO

iTrader: (12)

These newer style merges are closer to a true Y merge than those like in the pic above. So although the FM transitions better and doesn't neck down to 2.75" like the others, I don't see there being much of a gain. Now swapping the FM in for one like in the pic has to be worth a few ponies and some good torque as well.

thunderstruck507

iTrader: (18)

I just find it hard to believe a 3" single pipe is sufficient considering even with 3" duals my car gains around ~.1 et and ~1mph with dual cutouts.

If for some reason I absolutely had to run a y pipe, it would be 3" to 4" for anything other than a bolt on only car.

Full-Force

iTrader: (11)

its a no brainer .... dual 3" pipe into a 4" merge versus dual 3" pipe into a 2.75" merge

Turbo306Fox

iTrader: (3)

I'm about to do a 3" y to a FM merge 3" inlet 4" outlet with a 4" bullet whats everyone's opinion on this? I'm tired of the duals dragging everywhere

HCI2000SS

iTrader: (2)

That's what I have and really like it, but it would be hard for me to give up the duals if it were me lol

14k

I definitely gained something from my new 3" tsp y to my homemade 2.5" mandrel bent x setup. Way more torquey than before. Better clearance too.

I bought a bbk y to modify and make better than my current duals. Would running the bbk as is in 2.5 Y form.. am I hurting anything vs a 3" y?

tnmotown

iTrader: (107)

Did you ever get this exhaust done? I'm about to do the same and was wondering if you have any pics. I have the flowmaster 3" to 4" merge and a dynomax 4" bullet.