4" single vs 3" duals

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Dec 28, 2012 | 05:35 PM

#21

adamantium

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From: From the abyss

Quote:

Originally Posted by dr_whigham

Just remember it's not only the cross sectional area of the pipe... There's a lot going on "behind the scenes" as far as scavenging goes as well. An X pipe is always going to prevail and give you better midrange and upper RPM power.

Not in all cases, every engine has different needs. Different setups want different things. I agree in MOST situations an X pipe should scavenge more, but not always does that come out on the dyno. Ive seen setups where an ORY makes more than an x pipe setup.

Dec 29, 2012 | 09:33 AM

#22

Joe69z28

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From: Dirty South

Quote:

Originally Posted by 01ssreda4

3+3=6 and a 4 is a 4.

You're fine, stop listening to dumbasses.

Yea," stop listening to dumbasses " must be hearing voices. You will be fine with 4" and a good Y , but it will never flow better than 3" TD and a X.

Dec 30, 2012 | 12:21 AM

#23

Blk98Vert

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Duals all day every day. OP FYI the mufflex with spintech is one of the worst systems made for our cars, search and you will find massive gains by just removing the muffler

Dec 30, 2012 | 07:07 AM

#24

dr_whigham

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From: Lafayette, LA

Agreed. If you ever saw the inside of that muffler you'd know why. And I've yet to see a set-up that was NA that made more power with a Y pipe than an X dumped.

Dec 31, 2012 | 09:14 AM

#25

Joe69z28

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From: Dirty South

Quote:

Originally Posted by 01ssreda4

3+3=6 and a 4 is a 4.

You're fine, stop listening to dumbasses.

I would not read a whole lot into these numbers but this is a good guide to the capacity . I wish these single exhaust fans would back up what they say with some facts like dyno pull , track times .

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Post #19 in the Mod Guide Sticky:

A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…
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