zz4 exhaust?
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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."
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St. Jude Donor '06-'10, '13
Re: zz4 exhaust? (dberry)
ZZ4 ports are smaller than regular exhaust ports, especially the bottoms. Any exhaust manifold can be used as the manifold would have an opening larger than the port.
GM says in the ZZ4 manual that using regular port headers showed no performance difference over using the special "D" port headers. Both worked just the same.
I ran the stock manifolds from my 1980 on my ZZ4 for 1 1/2 years with no problems at all. They just restrict the performance pretty well. With the stock exhaust mine dynoed out at 220 HP at the rear wheels.
So, the stock manifolds would work fine. If you want to go better, but stay with cast iron, check out Sanderson Headers -- http://www.sandersonheaders.com -- they have cast iron higher flow, better looking manifolds for Chevy engines in the Corvette.
P.S. -- Welcome to the forum ! :seeya
[Modified by BSeery, 10:52 PM 12/12/2003]
GM says in the ZZ4 manual that using regular port headers showed no performance difference over using the special "D" port headers. Both worked just the same.
I ran the stock manifolds from my 1980 on my ZZ4 for 1 1/2 years with no problems at all. They just restrict the performance pretty well. With the stock exhaust mine dynoed out at 220 HP at the rear wheels.
So, the stock manifolds would work fine. If you want to go better, but stay with cast iron, check out Sanderson Headers -- http://www.sandersonheaders.com -- they have cast iron higher flow, better looking manifolds for Chevy engines in the Corvette.
P.S. -- Welcome to the forum ! :seeya
[Modified by BSeery, 10:52 PM 12/12/2003]
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Joined: Apr 2001
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From: Was New Orleans but swam to Baton Rouge LA
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Re: zz4 exhaust? (dberry)
I think the stock Rams horns will be the best choice if you do not want to use headers. If you could look for some from the 60s that are 2.5 inchers.
