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Old 06-01-2005, 09:47 AM   #1
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Question MAF and/or Throttle Body size / sizing chart ?

May be a bit naive on my part (over simplifying?) but is there a MAF sensor and/or TB sizing chart out there. From a novice perspective it sure seems like it would be a decision based on having a MAF and/or TB sized to match/support the flow of the intake and heads. If so it seems like there must be some sort of maf size to supporting flow type chart. Did a search and couldn't find anything. Found one link that referenced a pro flow web site but link/site returned "no site found".

Replacing stock intake to better match my heads very soon. Would like to better understand whether the need for a MAF and/or TB is in my future and/or whether I'd benefit from upgrading same.

If it is not as easy as referencing a chart how does one determine scientifically (much prefered over pure anecdotal recommedations) what the proper maf size is for a particular setup?

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Old 06-01-2005, 05:03 PM   #2
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a rough guideline only...flywheel HP

stock can make about 350
65 can make about 450
75 can make 550

this ASSumes naturally aspirated and are ball park #'s
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Old 09-03-2006, 05:40 AM   #3
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Question

Quote:
Originally Posted by 351Freak
a rough guideline only...flywheel HP

stock can make about 350
65 can make about 450
75 can make 550

this ASSumes naturally aspirated and are ball park #'s
Is this still considered accurate ?

What size does a 91 GT have as stock ?
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Old 09-16-2006, 04:25 AM   #4
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Question

Can someone please expand on how to pick the correct size Throttle Body and MAF for one's application ??
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Old 09-16-2006, 11:38 AM   #5
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See Holden's book in my sig.

A MAF 75mm or bigger won't be a restriction. A 70mm TB or bigger won't be a restriction. A 65mm TB is not a restriction until ~600 HP.

As you go to a bigger TB, you loose low-end throttle response. It's minor and not important for most people.
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