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Old 01-10-2008, 08:40 PM   #1
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Default pipe outlet size matters?

hi,
just wondering what'll be the diff in performance/effect between a 5mm and a 6mm pipe outlet hole...
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Old 01-10-2008, 08:47 PM   #2
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hi,
just wondering what'll be the diff in performance/effect between a 5mm and a 6mm pipe outlet hole...
Overall power will increase.
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Old 01-11-2008, 12:40 AM   #3
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Overall power will increase.
that's for the bigger 6mm hole?

hmm...then why there's 2 choices? 5 or 6mm?

lastly, what's the biggest size suitable? we could bore bigger right?!?
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Old 01-11-2008, 01:57 AM   #4
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that's for the bigger 6mm hole?

hmm...then why there's 2 choices? 5 or 6mm?

lastly, what's the biggest size suitable? we could bore bigger right?!?
The reason there is a choice is that the 5.2mm outlet is the maximum Leagle size for sanctioned racing!
The bigger outlets are used in outlaw racing classes as i think that there is no limit!(I think)
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Old 01-11-2008, 05:26 AM   #5
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i got creative with stinger size or just plane board so i had an old pipe and drilled it out a little at a time. it started of with overal performance was better more torque and a little more mid so i keep going bigger and stoped about 6.6mm (i think its been awhile) sounded good but i took it to far lost my top end
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Old 01-11-2008, 12:11 PM   #6
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Roar .12 = 5mm
Roar .12 outlaw = 5.2mm

Other than that, those are the only sizes you can go to.

Roar .15 = 5.2mm
Roar .15 Open = 6.5mm
Roar .21 Open = 8mm
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Old 01-11-2008, 05:52 PM   #7
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Roar .12 = 5mm
Roar .12 outlaw = 5.2mm

Other than that, those are the only sizes you can go to.

Roar .15 = 5.2mm
Roar .15 Open = 6.5mm
Roar .21 Open = 8mm
The Outlaw Shark pipe has a 7mm stinger outlet from memory for 12 engines.
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Old 01-11-2008, 08:31 PM   #8
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i got creative with stinger size or just plane board so i had an old pipe and drilled it out a little at a time. it started of with overal performance was better more torque and a little more mid so i keep going bigger and stoped about 6.6mm (i think its been awhile) sounded good but i took it to far lost my top end
that's weird.. you're supposed to have more top end as the stinger size gets bigger..
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Old 01-11-2008, 08:37 PM   #9
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that's weird.. you're supposed to have more top end as the stinger size gets bigger..
it then gets to a point where you loose the back pressure resonance i thin due to the pipe being too open and not having enough pressure. I think this then ruins the pipes ressonance. only guessing
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