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Author Topic: Cut off the muffler  (Read 2847 times)

Iluvboost

  • Newbie
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  • Posts: 3
    • 91 xr2 turbo
Cut off the muffler
« on: August 25, 2014, 12:22:38 PM »
So I'm new to the forum just got my first 91 capri turbo
Has 110,000 miles hard top I cut the factory muffler off to run side exit free everything up
Now runs like crap not pulling as hard does these cars need muffler to run right I have had a bunch of turbo cars in my day and the first thing we do is cut off muffler and straight pipe it they allways run better thanks for help and I luv my xr2
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blueamber

  • Sr. Member
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  • Posts: 450
Re: Cut off the muffler
« Reply #1 on: August 25, 2014, 11:04:01 PM »
Sounds like you will be the expert on what running a turbo capri without a muffler is like.  Maybe the turbo needs a little back pressure to spin up properly, you still getting good indicated boost at the gage?

On a personal note, PUT THE MUFFLER BACK ON SO MY HEARING WON"T BE DAMAGED IF I RIDE UP BESIDE YOU.

Just a pet peave of mine, in Florida we have a no-muffler-ok law for motorcycles, and gets pretty noisy at times.  Of course, we also have a no helmet law, so the number of bikers is thinning out due to head injuries...

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Iluvboost

  • Newbie
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  • Posts: 3
    • 91 xr2 turbo
Re: Cut off the muffler
« Reply #2 on: August 26, 2014, 07:35:41 PM »
The capri with no exhaust side exit is not as loud as a honda with fart can it ended up being a bad battery cause runs fine after I put battery in
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Rocketman

  • Administrator
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  • Posts: 5493
    • 91 BPT AWD Capri & 1991 XR2
    • http://www.werbatfik.com
Re: Cut off the muffler
« Reply #3 on: August 26, 2014, 10:03:54 PM »
The turbo does a lot to help reduce noise - a straight piped turbo car is nowhere near as loud as a nonturbo.

A proper exhaust is always better than just taking the muffler off, though. Can't really say why you're down on power it should free things up a bit
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1.8L Turbo All Wheel Drive Capri... the "GTXR2"


Iluvboost

  • Newbie
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  • Posts: 3
    • 91 xr2 turbo
Re: Cut off the muffler
« Reply #4 on: August 28, 2014, 10:34:17 PM »
So update put my mass air flow adapter on an cone filter it helped it out
A lot but still not like it supposed to run it kinda cuts out threw powerband and won't go to redline I think the gas that's in it is bad anybody have this prob
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cjizzle252

  • Newbie
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  • Posts: 45
    • 91 Capri XR2 89 Suzuki gsx1100 Katana
Re: Cut off the muffler
« Reply #5 on: September 19, 2014, 02:45:49 PM »
saw zawed my muffler off the other day while installing a new one, did a test drive without it and definitly lost a few pounds of boost without a muffler, only other thing i  have done is intake boost is all stock
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