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Old 20 November 2016, 07:43 PM
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Cullenmin
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Default Side exit exhaust - Classic

Hi Scoobynutters,

I'm planning a side exit exhaust in my classic type R.

Does anyone have any pictures of their side exit's. Any hints or tips, do's or dont's in doing this mod?

Cheers
Rich
Old 20 November 2016, 07:56 PM
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johned
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Each to their own.
Old 20 November 2016, 08:20 PM
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Cullenmin
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Because Race Car.
Old 20 November 2016, 08:22 PM
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JGlanzaV
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Originally Posted by Cullenmin
Because Race Car.
Most race cars comply with noise limits. And most tracks have noise limits these days....

So because pretend race car?
Old 20 November 2016, 08:38 PM
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Cullenmin
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Well to be fair, the Gobstopper seems to 'comply' with noise limits just fine!
Old 20 November 2016, 08:53 PM
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Arch
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I have a side exit on the RA it has one box and noise checks at 99/101 dB will see if I can find some pics
Old 20 November 2016, 09:15 PM
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Cullenmin
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Originally Posted by Arch
I have a side exit on the RA it has one box and noise checks at 99/101 dB will see if I can find some pics
Hi Archie, that would be spot on. I have gone flat boot floor and possibly planning the cut out bumper mod with side exit. Some pics would help my research cheers

Rich

Last edited by Cullenmin; 20 November 2016 at 09:16 PM.
Old 21 November 2016, 10:33 AM
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Arch
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No problem will get some later today. I will probably redo mine for next year with a smaller box as it is probably too big at the minute. It's easy to stay within track noise limits with a single box and also easy to stay fairly quiet for road use.
Old 21 November 2016, 07:41 PM
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gussy
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Rich I went side exit on mine to begin with but found it caught on my trailer when I was loading the car it exited on the drivers side just infront of the rear wheels and was quite low down this could have been fixed by welding/fabricating a tunnel in the floor pan and also cutting a tunnel into the sill but as my plumbed in system is just behind my seat i would have had to change all that also my sill stands holes were in the way.

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ended up changing it to a single box and due to having a flat boot floor was able to lift it higher the exiting through the rear bumper with a down turn to help with noise tests.

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Old 21 November 2016, 08:25 PM
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Mine comes out the rear passenger door, but it's a new age.

Quiet as a mouse.
Old 21 November 2016, 08:28 PM
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Old 21 November 2016, 08:29 PM
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Trying to find quality, quite boxes to enable a single box is the hard part.
Old 22 November 2016, 12:33 PM
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Ok thanks for the info lads.

I have reduced the size of my fuel tank considerably so I have plenty space on the passenger side to fit a back box.

I will keep in mind the points noted: loading on/off trailer, height, jacking point etc

Cheers
Old 22 November 2016, 02:28 PM
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alex_00s
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All my pics are on FB, but I've had a custom side exit made by a local engineer and also top notch exhaust place...

Pics will be in Banzai mag next year, sorry I know that doesn't help you right now.
Old 22 November 2016, 03:30 PM
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birchy2010
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Mines a new age but I exited it from the front bumper. Single box and iirc made 98db at donnington at 5k. All about the quality of the box to allow just one.
Old 22 November 2016, 05:06 PM
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Ash Webster
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Originally Posted by birchy2010
Mines a new age but I exited it from the front bumper. Single box and iirc made 98db at donnington at 5k. All about the quality of the box to allow just one.
what are the benefits of an exhaust that small (in length)? simply faster air can gets out = more power?
Old 23 November 2016, 05:31 PM
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Originally Posted by Ash Webster
what are the benefits of an exhaust that small (in length)? simply faster air can gets out = more power?

hotter gasses flow faster = more power
lower back pressure = faster flow = more power

the idea is just to get the gasses hot as poss and out as fast as poss with as little restriction as possible.

however you manage that its all good
Old 24 November 2016, 10:53 PM
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Arch
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Sorry not been able to get pics yet been busy at work.
If you have removed the standard tank it's very simple to go side exit if not its a bit harder and not as easy to get a decent flow.
If you exit forward of the front wheels and intend to compete in the car you won't be able to run in any MSA organised sprint event.
Old 25 November 2016, 09:09 PM
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Originally Posted by Arch
Sorry not been able to get pics yet been busy at work.
If you have removed the standard tank it's very simple to go side exit if not its a bit harder and not as easy to get a decent flow.
If you exit forward of the front wheels and intend to compete in the car you won't be able to run in any MSA organised sprint event.
Thats ok Arch, no rush mate

I will be reading the regs before I carry out any mods, I intend to exit just in front of the rear passanger wheel (or thereabouts making sure I still have a jacking point).

You will be more familiar with the regs than I am so as long as i dont have it coming out the front bumper then I should be fine.

Yes I have a large gap where the fuel tank was on the pass side so should get a backbox fitted in there, I will have a better idea of the space I have to play with once I get the car back together and put it up on a ramp. Its currently on axle stands in my single garage so not the easiest to work with when theres limited space

Cheers
Old 23 May 2017, 02:38 PM
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MY94BlueWRX
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Hi there,


Did you manage to get your side exit finished? As I've just finished one on our track car and wondered how you'd tackled yours?


Cheers,
Kim.




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