6-71 vs 8-71 blowers - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-17-2008, 01:32 PM
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6-71 vs 8-71 blowers

i need to no if i should use an 8-71 or 6-71 blower on my 68 gto's 400 cui engine

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Old 07-17-2008, 03:19 PM
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A 6-71 would do just fine for street use.

Have you decided what brand blower you are going to go with? You could always call BDS and give them your specs, and what you want out of it, they will tell you what would work best for you.

Jason
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Old 07-17-2008, 07:38 PM
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A roots type 6-71 over 400 cid will be fine for a street deal with a driver frendly blower cam and stock flowing heads.If you build the engine with a big stick and honking cyl heads..the additional cfm the 8/71 delivers will allow you to underdrive the unit vs the 6/71 and reduce intake charge temp and ward off detonation issues.
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Old 07-18-2008, 06:57 AM
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Quote:
Originally Posted by fatblock
..the additional cfm the 8/71 delivers will allow you to underdrive the unit vs the 6/71 and reduce intake charge temp and ward off detonation issues.
I went with an 8-71 on my 392 Hemi exactly for the reason stated above.

Steve
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Old 07-18-2008, 03:06 PM
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6-71 Or 8-71

Quote:
Originally Posted by steve392
I went with an 8-71 on my 392 Hemi exactly for the reason stated above.

Steve
I went with an 8-71 as well,turn it slower making the same boost,and less heat.
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Old 07-18-2008, 03:58 PM
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Take a look at the new Popular Hot Rodding issue on the newsstands, there is an excellent article on blowers and recommendation in this months issue. Good reading!
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