Flowmaster merge??
#1
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Flowmaster merge??
I just received my SLP Dual Dual from another member here and I am going to either my my y-pipe repaired(it broke right where the two pipes are welded to one another) and then have the flowmaster Merge installed into it OR I may jjust buy a Y-pipe from Mufflex since it already has the Merge incorporated into it. My question is this: I noticed that most people who use the Merge have the 4 inch version , does Flowmaster make a 3 inch version. If Flowmaster doesn't make it in 3 inch and I have to use a 4 inch, would it benefit me to have a 4 inch I-pipe then reduce down to the 3 inch over axle pipe or not? I was thinking about utilizing a 4 inch I-pipe and a 4 inch overaxle pipe then reduce done to the 3 inch going into the Dual Duals muffler.
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I have been thinking about this setup. What I would do is use the two 3in into a single 4in merge with 4 inch I pipe with a 4 inch cutout and then reduce back into 3 inches over the axle.
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Flowmaster makes a 3inch in and 3.5 out merge pipe. Just got mine couple days ago from summit. http://www.summitracing.com/parts/FLO-Y300350/
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it wouldnt pay to do the 3" in 3.5" out. the 3.5" out is simply not enough to handle the 3" in. if you measure for the surface area, a dual 2.5" input is optimized with a single 3.5" exit. a dual 3" inlet is optimized with a 4" or 4.5" single outlet.
just do the math its a simple equation
Area of a circle = πr²
using this method is how i realized when i got my mac mids that the y-pipe on it is simply a poor design. it was two 2½" pipes going into a single 2.75" pipe. The surface area of two 2½" pipes is 9.82. The surface area of the single 2.75" outlet was 5.98 which is way less. What is really needed is a 3.5" outlet which gives a surface area of 9.62 which is close enough to the 9.82. Since I already had an slp loudmouth exhaust which is a 3" system I havent yet wanted to spend the money to replace it so for now I went with a flowmaster merge which converts the dual 2½" pipes into a single 3" pipe. This gives me a surface area of 7.07 which is way better than the 5.98 from the mac y-merge but I am still giving up some surface area which means that until i go with a 3.5" catback, the gain from the mac mids will not be taken advantage of to the fullest. Hope this helped.
just do the math its a simple equation
Area of a circle = πr²
using this method is how i realized when i got my mac mids that the y-pipe on it is simply a poor design. it was two 2½" pipes going into a single 2.75" pipe. The surface area of two 2½" pipes is 9.82. The surface area of the single 2.75" outlet was 5.98 which is way less. What is really needed is a 3.5" outlet which gives a surface area of 9.62 which is close enough to the 9.82. Since I already had an slp loudmouth exhaust which is a 3" system I havent yet wanted to spend the money to replace it so for now I went with a flowmaster merge which converts the dual 2½" pipes into a single 3" pipe. This gives me a surface area of 7.07 which is way better than the 5.98 from the mac y-merge but I am still giving up some surface area which means that until i go with a 3.5" catback, the gain from the mac mids will not be taken advantage of to the fullest. Hope this helped.
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Good thing I read this, I was planning 3" in , with a 3.5" out and into a 3.5" I pipe with cutout.
Guess I'll aim for the 4" I pipe and a 4" cutout. Thanks for educating us.
Will I be okay then stepping down after the cutout to a 3" pipe to go into my GMMG??
Guess I'll aim for the 4" I pipe and a 4" cutout. Thanks for educating us.
Will I be okay then stepping down after the cutout to a 3" pipe to go into my GMMG??
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#9
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when the cutout is closed u will be down about 10-15hp
Only consilation I guess is at least the price of the cutout will be worth paying......
Sorry to the OP for