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  #1 (permalink)  
Old 11-15-2016, 08:44 PM
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Default AFR 205 Heads

My new 427W engine from (Keith) Craft Performance Engines came with these heads, and there are two exhaust flange mounting holes. Inner holes 2" apart, and outer 3" apart.

I'd rather use the outer holes so the header tubes won't have to be crimped in because the bolts are so close. But I've found the outer holes are shallower, about 5/16" deep vs. the inner holes at 1/2" deep. The bolt size is 3/8".

The AFR flange bolts I have are 1" under the head and they bottom out on the outer holes.

I worry about the shallower holes having to support the weight of the header and sidepipes... Has anyone else tackled this dilemma?
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Old 11-16-2016, 03:34 AM
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5/16 thread engagement is sufficient
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Old 11-16-2016, 07:15 AM
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Where the shallower holes meant for studs?

Mark
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Old 11-16-2016, 01:58 PM
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Quote:
Originally Posted by MAStuart View Post
Where the shallower holes meant for studs?

Mark
Thats a very good point.
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Hurricane HM-2008 build is done!! (for now....)
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Old 11-17-2016, 10:19 AM
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I never noticed that the outer holes are shallower. I used studs in my AFR's just for ease of taking off and installing the headers.
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