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67regal
PostPosted: Thu Oct 04, 2018 10:20 pm 
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4 BBL ''Hyper-Pak''

Joined: Sun Aug 12, 2018 1:20 am
Posts: 29
Location: Australia
Car Model: VC valiant regal
Hey guys, just looking for a little advice on the best size of extractors to run on my 225.

Currently have 1 1/2" and will be ugrading and mild porting of head, increasing compression, new aussiespeed 4bbl intake manifold, Edelbrock 500cfm carb....

Do I need to move up to 1 5/8" ?
Thanks
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emsvitil
PostPosted: Fri Oct 05, 2018 12:21 am 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
See what happens first...…..

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)
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67regal
PostPosted: Fri Oct 05, 2018 12:55 am 
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4 BBL ''Hyper-Pak''

Joined: Sun Aug 12, 2018 1:20 am
Posts: 29
Location: Australia
Car Model: VC valiant regal
emsvitil wrote:
See what happens first...…..

Thanks but I was hoping to do it right the first time, and not have to change anything out afterwards and retune etc... Cheers.
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Dart270
PostPosted: Fri Oct 05, 2018 4:13 am 
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 16505
Location: Blacksburg, VA
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You will be totally fine with 1.5" extractors/headers. Only the most wild race builds need 1 5/8". Go for it!

Lou

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