4" mufflex system what size exhaust to y pipe
#1
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4" mufflex system what size exhaust to y pipe
Long tube headers with 3" collectors, What size pipe from the collector to the y pipe would be sufficient ? 355 450hp spinning to 6700rpm
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Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
Re: 4" mufflex system what size exhaust to y pipe
you don't have the mufflex y-pipe? that y-pipe is 3" but is flattened out in some areas to clear some items under the car.
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Re: 4" mufflex system what size exhaust to y pipe
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Car: 1992 Z28 Camaro w/70k
Engine: 427 w/4" Mufflex Exhaust
Transmission: 700R4 3500 stall
Axle/Gears: 4.10:1
Re: 4" mufflex system what size exhaust to y pipe
I've got the Mufflex Y-pipe, but if you're just looking for a picture to build on of your own, this might help you. I have Hooker LT's, 3" couplers into a single 4" Mufflex Exhaust (Magnaflow) muffler. I had to notch the Transmission Cross member for the clearance.
Hope that helps....
Front to back
crossmember notch 1
#5
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Re: 4" mufflex system what size exhaust to y pipe
What I'm trying to find out is X size pipe supports X amount of volume and hp. On top of that there is scavenging. Both 2.5 and 3 pipe has there pro and con and I'm trying to decide which I need
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Car: 1992 Z28 Camaro w/70k
Engine: 427 w/4" Mufflex Exhaust
Transmission: 700R4 3500 stall
Axle/Gears: 4.10:1
Re: 4" mufflex system what size exhaust to y pipe
We might need to know other information such as Carb Size (if carb) or TB size if FI. Intake port size, Head Port/Valve sizes & cam details. Obviously all of that needs to be matched up. As an example, it would be pretty silly to have a 600cfm Carb (or Stock TPI) and monstrous cam that isn't matched and think two 3" pipes into a single 4" exhaust is what's needed. Or a Holley Dominator 1000cfm Carb, Huge Cam, 195 cc heads requires a 2-1/2" I'm not saying that's your set up, but knowing that information would probably be helpful in determining what's needed....
My set up for comparison is 850 carb, .603/.618 lift cam .247/.253 duration, 210 CC AFR Heads with 2.08/1.60 valves. I originally had 2-1/2" couplers off my SLP shorty heads into a single 3" exhaust and ran 13.1 @ 104 tops. I changed ONLY the exhaust, tuned the carb a bit and ran 11.99 @ 117 the following year with my current set up (two 3" into a single 4")
If I'm understanding you correctly, that's what you're looking for? Good luck with finding your answer.
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Car: 1982 Z-28
Engine: 383
Transmission: Turbo 350
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Re: 4" mufflex system what size exhaust to y pipe
For your power levels the Mufflex Y is plenty for your combo. Yes there are different scavenger effects, but for your combo just go with the Mufflex Y into the 4".
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#8
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#9
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Re: 4" mufflex system what size exhaust to y pipe
Oh I thought you were just asking for what size pipe. I saw that in your first post you mentioned your Engine size/HP and RPM but I didn't relate them to your ultimate goal of finding out volumetric requirements to support said HP & RPMs.
We might need to know other information such as Carb Size (if carb) or TB size if FI. Intake port size, Head Port/Valve sizes & cam details. Obviously all of that needs to be matched up. As an example, it would be pretty silly to have a 600cfm Carb (or Stock TPI) and monstrous cam that isn't matched and think two 3" pipes into a single 4" exhaust is what's needed. Or a Holley Dominator 1000cfm Carb, Huge Cam, 195 cc heads requires a 2-1/2" I'm not saying that's your set up, but knowing that information would probably be helpful in determining what's needed....
If I'm understanding you correctly, that's what you're looking for? Good luck with finding your answer.
We might need to know other information such as Carb Size (if carb) or TB size if FI. Intake port size, Head Port/Valve sizes & cam details. Obviously all of that needs to be matched up. As an example, it would be pretty silly to have a 600cfm Carb (or Stock TPI) and monstrous cam that isn't matched and think two 3" pipes into a single 4" exhaust is what's needed. Or a Holley Dominator 1000cfm Carb, Huge Cam, 195 cc heads requires a 2-1/2" I'm not saying that's your set up, but knowing that information would probably be helpful in determining what's needed....
If I'm understanding you correctly, that's what you're looking for? Good luck with finding your answer.
#10
#12
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Re: 4" mufflex system what size exhaust to y pipe
Start reading threads instead of regurgitating things you've read online, 2nd and 3rd post already covered it if you actually read a thread
#13
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