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Old 01-29-2013, 07:34 PM   #1
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Default Matching exhaust manifold to exhaust port?

This is probably a dumb question, but is the stock HPI manifold rectangle supposed to be dramatically different than the engine port?

Would performance increase or decrease if I matched these?

I just noticed this after an exhaust leak developed at the gasket interface due to loose screws.

Any help for a newbie to nitro?
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Last edited by tperazzo; 01-29-2013 at 09:28 PM.
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Old 01-30-2013, 03:25 AM   #2
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Yes. You can use a dremel to enlarge the hole in the manifold. I think it will not be much but it should be noticeable.
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Old 01-30-2013, 09:29 AM   #3
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Thanks Roelof, This abrubt mismatch seems very restrictive to me so I thought this might be intentional by HPI to prevent over-reving or something like that.

I will give it a try and report back.
Thanks,
Tom
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