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PostPosted: Thu Jul 20, 2017 6:57 pm 
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Joined: Tue Jun 07, 2011 6:37 am
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Location: Rio Rancho, New Mexico
https://www.youtube.com/watch?v=azPKIjxmmdU

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PostPosted: Thu Jul 20, 2017 8:18 pm 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 2367
One of the businesses I work is automotive based, I do HEI, MSD trigger only and EFI-HEI conversions to point distributors.

I get to go to a lot of perfectly useless dyno comedies, and see stuff like in the video all the time.

Just goes to show that when the wrong diameter primary pipe is used in a header, power gets better when a too big tube is altered smaller.

Old racer's saying, " you can't trade volume over velocity". Too Big, is too slow in stuff like this. One better way would be to use a tapered primary pipe in the header, just as our two strokes like.


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