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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Muffler mounting?

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Old Oct 19, 2006 | 08:03 AM
  #1  
JEDI87's Avatar
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From: Gardnerville,Nv./South Lake Tahoe
Muffler mounting?

When I had my Flowmaster installed, the guy installed itvertical instead of horizontal. It's mounted like this ! shouldn't it be like this -, looking at it from the rear?
Is there any performance loss having munted this way?

Last edited by JEDI87; Oct 19, 2006 at 08:04 AM.
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Old Oct 19, 2006 | 08:08 AM
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I installed mine vertical, it seems to fit better that way. I really cant see how mounting position would have any performance effect.
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Old Oct 19, 2006 | 08:11 AM
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From: Barrie, Ontario CANADA
Mine is vertical too. Fits better
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Old Oct 19, 2006 | 08:14 AM
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From: Oklahoma State
Originally Posted by 4Rocker
I installed mine vertical, it seems to fit better that way. I really cant see how mounting position would have any performance effect.
I can't either, the only problem I can think of would be if you had a muffler with a weep hole to drain water and the weep hole wouldn't be at the bottom anymore.
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Old Oct 19, 2006 | 08:15 AM
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From: Gardnerville,Nv./South Lake Tahoe
I was thinking of all the condensation that builds up just pooling up inside, stupid I know.
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Old Oct 19, 2006 | 08:16 AM
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I don't think it'l affect any performance, but as mt goat said it kinda makes your weep hole useless depending on where it is. Tthe new(er) dodge pickups come with the muffler mounted vertically, if i recall correctly.
edit: too slow...
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Old Oct 19, 2006 | 08:19 AM
  #7  
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From: Oklahoma State
Originally Posted by JEDI87
I was thinking of all the condensation that builds up just pooling up inside, stupid I know.
Yeah my last muffer had the baffles break loose on the inside, so my new one I paid the extra for stainless steel.
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Old Oct 19, 2006 | 08:41 AM
  #8  
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From: Oklahoma State
The muffler guy installed mine at an interesting angle.
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Old Oct 19, 2006 | 08:48 AM
  #9  
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From: Gardnerville,Nv./South Lake Tahoe
I wonder why he did that. My old 94 truck was mounted like that too.
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Old Oct 19, 2006 | 09:16 AM
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From: Sarasota, FL
Originally Posted by JEDI87
I was thinking of all the condensation that builds up just pooling up inside, stupid I know.
I dont think that's really an issue honestly. When the engine gets up to temperature the EGTs are what, 600+ *F at cruise and at WOT over 1500*F!! (1550*F is what monstermaxx was finding at the exhaust port with his EGT monitoring system.)

considering that water boils (at sea level) at 212*F I dont think you have to worry about water collecting in the muffler. As a test, after you get done driving around get under your truck and flick some water on the muffler. I bet it sizzles off like it would on a hot frying pan....

If you live at higher elevations the boiliing point (bp) of water will be less, say 200*F.... This is why you have to boil eggs at high elevation longer - the water isnt as hot because the atmospheric vapor pressure is less.... [/chemistry stuff...lol]

But yeah if you had any water in the muff it would evaporate/boil off in very short order. The reason you get h2o out of the exhaust pipe is that in the last few feet the temperature is REALLY plummeting since there is a pressure drop.

Last edited by Bumpin' Yota; Oct 19, 2006 at 09:26 AM.
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Old Oct 19, 2006 | 09:43 AM
  #11  
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From: Oklahoma State
Originally Posted by JEDI87
I wonder why he did that. My old 94 truck was mounted like that too.
That's the way it fit in the best (it's a 24" Magnaflow), allowing the best clearance between the shock and traction bar. He ask me if I wanted it any different, but it looked fine to me.

Bumpin' I think the water is only a problem when you do a lot of very short trips and the muffer doesn't have a chance to get hot.
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Old Oct 19, 2006 | 10:42 AM
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I mounted mine horizontal for better ground clearance:

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Old Oct 19, 2006 | 11:06 AM
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From: Sarasota, FL
those leaf springs look like they are in some PAIN!! lol
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