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07-24-2012, 11:45:13 PM
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#1
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Gold Member
Join Date: Apr 2002
Location: Fort Necessity, Louisiana
Posts: 1,046
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D shaped exhaust port heads
What headers are you using on your d shaped exhaust port heads?
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07-24-2012, 11:57:03 PM
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#2
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Lifetime Gold Member
Join Date: Apr 2007
Location: Chicago, Illinois..... Far S.W. Subs, RT 66 Area
Posts: 4,842
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.
I used standard headers.
The same as any port, you just need to match the flange to fit.
Mine was Hooker super comps IIRC, but that was 20 years ago.
.
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07-25-2012, 10:51:04 AM
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#3
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Lifetime Gold Member
Join Date: Mar 2001
Location: Joplin Mo. 64801
Posts: 11,980
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Round, oval or square port headers work well with D port heads.
The most flow is at the top of the port, the bottom has very little.
The mis-match works as an anti-reversation dam.
They used to sell anti-reversation adapters back in the early 80's.
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Originally Posted by Lowend
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Originally Posted by Lowend
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07-25-2012, 11:22:35 AM
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#4
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L. G. M. / Moderator
Join Date: Jun 2002
Location: out and about...
Posts: 9,686
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Make sure the top of the D is not restricted by the pipe. The GM D-port heads are assymetric- more opening above the bolt line than below. IIRC, most 1-3/4" round headers will go over the D-port, but I'd use a gasket or pencil/paper/crayon template/rub to verify before installing them. The last thing you want is the top of the pipe hanging down into the top of of the D.
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07-25-2012, 11:33:25 AM
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#5
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Gold Member
Join Date: Apr 2002
Location: Fort Necessity, Louisiana
Posts: 1,046
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Thanks guys. The heads that are on my new crate engine are pro-filer with the d shaped port. My old engine allready had headers, 1 5/8 primaries. I am wondering if I have to buy new headers. Trust me I want too. And I will if nessesary but won't if I do t have too. What is the best sealing gasket? Aluminum? Thanks, charlton
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07-25-2012, 01:11:26 PM
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#6
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Lifetime Gold Member
Join Date: Nov 2004
Location: Ringgold, GA
Posts: 4,808
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Hedman and probably a few others make D port specific headers. My RPM heads are D port and Eddy guys told me use a standard 1 5/8 header, I went with Hooker's.
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79 Z28 bought new, honeymoon ride same year, still have same wife, same car.
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07-25-2012, 01:18:06 PM
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#7
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Gold Member
Join Date: Apr 2002
Location: Fort Necessity, Louisiana
Posts: 1,046
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Quote:
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Originally Posted by CorkyE
Hedman and probably a few others make D port specific headers. My RPM heads are D port and Eddy guys told me use a standard 1 5/8 header, I went with Hooker's.
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Thanks Corky. |
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