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Old March 28th, 2011, 09:23 AM   #421
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x3

Anyone run flowmaster 70 series? I am wanting something that is kinda quite, but still has bark. My plan was 2.25 back to 1 70 series then 3.0 out the back. Is there a quieter option that flows well?
I'm running dual 70 series and all I can say is I CANNOT WAIT TO GET RID OF THEM. It was cool at first, but long trail rides are horrible.
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Old March 28th, 2011, 10:23 AM   #422
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The number of bends and length of piping after the muffler can have an effect as well. Try to run full length pipes out the back, rather than a short turn down right after the muffler.

I'm thinking to run 2.25 off the headers to a single 3" muffler, but I haven't bought it yet, probably in the next couple weeks.
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Old March 28th, 2011, 10:47 AM   #423
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isnt there a formula or something for the flow that says a 90* bend is like adding 10 feet?
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Old March 28th, 2011, 11:12 AM   #424
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she needs to dump it right after the skid. would look gay as hell going all the way out the back.
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Old March 28th, 2011, 11:15 AM   #425
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Originally Posted by Haggar View Post
The number of bends and length of piping after the muffler can have an effect as well. Try to run full length pipes out the back, rather than a short turn down right after the muffler.

I'm thinking to run 2.25 off the headers to a single 3" muffler, but I haven't bought it yet, probably in the next couple weeks.
2.25 seems mighty small

crawl under a newer(04 and newer) 2500hd and look how big the exhaust is.
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Old March 28th, 2011, 11:16 AM   #426
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she needs to dump it right after the skid. would look gay as hell going all the way out the back.
what any goodexhaust guy could hide it
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Old March 28th, 2011, 11:19 AM   #427
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2.25 seems mighty small

crawl under a newer(04 and newer) 2500hd and look how big the exhaust is.
My understanding for my motor (5.3) is the stock exhaust is a single 2.56" ID exhaust.

I'm thinking 2.25" per cylinder bank, merge into a 3" pipe. I have some of the stock downpipes on the manifolds, I'll check them, maybe 2.5 is more appropriate..
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Old March 28th, 2011, 11:22 AM   #428
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My understanding for my motor (5.3) is the stock exhaust is a single 2.56" ID exhaust.

I'm thinking 2.25" per cylinder bank, merge into a 3" pipe. I have some of the stock downpipes on the manifolds, I'll check them, maybe 2.5 is more appropriate..
i was thinking you had a 6.0
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Old March 28th, 2011, 11:26 AM   #429
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there you go thinking again...
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Old March 28th, 2011, 12:18 PM   #430
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Originally Posted by clarkstoncracker the d-bag View Post
I'm running dual 70 series and all I can say is I CANNOT WAIT TO GET RID OF THEM. It was cool at first, but long trail rides are horrible.
So, what would you recommend? Also, do you have them going all the way out or dumped underneath the tub?
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Quote:
Originally Posted by Haggar View Post
My understanding for my motor (5.3) is the stock exhaust is a single 2.56" ID exhaust.

I'm thinking 2.25" per cylinder bank, merge into a 3" pipe. I have some of the stock downpipes on the manifolds, I'll check them, maybe 2.5 is more appropriate..
Pretty similar to my plan, what are you thinking for a muffler? Are going to build your own exhaust? I might see if the exhaust shop can sneak 2.5 in though.
thanks
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Old March 28th, 2011, 12:41 PM   #431
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Originally Posted by HOODPIN View Post
she needs to dump it right after the skid. would look gay as hell going all the way out the back.
This is exactly what I plan to do. I don't want it all the way to the back , just one more thing to get caught up on or rip off. Pretty set on Spintech super pro street 6000.

Last edited by jeepbrattt; March 28th, 2011 at 02:32 PM.
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Old March 28th, 2011, 12:43 PM   #432
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This is exactly what I plan to do. I don't want it all the way to the back , just one more thing to get caught up on or rip off. Pretty set on Spintech
I had the moroso spiral flow on the viper...they sounded good however that was a v-10 so I'm not sure that helps you
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Old March 28th, 2011, 01:48 PM   #433
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she needs to dump it right after the skid. would look gay as hell going all the way out the back.
Thankyou.



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Old March 28th, 2011, 02:41 PM   #434
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Thankyou.
Yeah, yours is about what I was thinking of. Dumping under the tub gets old. Especially loud as hell when you are in water. Get a bit of a tailpipe out the back and it channels the sound away.

Not going to feel any difference in power adding a few bends.
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Old March 28th, 2011, 07:28 PM   #435
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This is the series i'm looking at. http://www.spintechmufflers.com/muff...es/cat_23.html

Now, the flanges that came with my headers have 2 1/4 inch pipe on them.......so that's all fine, but would you go center/center...center/offset...side/side????? And why?

thoughts?
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Old March 28th, 2011, 07:37 PM   #436
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depends how you route it to fit it tightly under the jeep and where your dumping it out at. The offset vs the Center outlets I wanna say are design sound wise and flow differently so depends on tastes for that as well.
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Old March 28th, 2011, 07:57 PM   #437
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depends how you route it to fit it tightly under the jeep and where your dumping it out at. The offset vs the Center outlets I wanna say are design sound wise and flow differently so depends on tastes for that as well.
Dumping it down right after the skid. However, after sending the stats over to Kevin, these are going to be to long. The 9000 series is too damn loud, so on I search.

Magnaflows are too big as well......flowmasters i've been getting pm'd not to use because they again are loud as hell.


*sigh*
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Old March 28th, 2011, 08:20 PM   #438
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With a big v8 its gonna be loud because you don't have room for a big muffler. you can hush it a bit, but everyone i have seen, when you skinny pedal it the motor is gonna talk

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Old March 28th, 2011, 08:30 PM   #439
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I run a pair of cherry bomb turbos on my TJ because they were the smallest I could find. They were cheap, too.
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Old March 28th, 2011, 08:30 PM   #440
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With a big v8 its gonna be loud because you don't have room for a big muffler. you can hush it a bit, but everyone i have seen, when you skinny pedal it the motor is gonna talk

$.02
I agree. The extra pipe back to the rear helps reduce the rumble a lot. I've also found that you will smell the exhaust a lot more when it dumps underneath.
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