AMC Eagle Den Forum

The Mighty 258 => Exhaust System. => Topic started by: 85AmCfreak on March 08, 2012, 11:58:00 AM

Title: 1980 intake manifold 1985 exhaust manifold???
Post by: 85AmCfreak on March 08, 2012, 11:58:00 AM
Is it at all possible to use the 1980 intake manifold with the 1985 exhaust manifold?
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: doc65 on March 08, 2012, 12:23:17 PM
I see a problem with the EGR interconnect & the fact that the 80 should bolt together Intake & Exhaust.  Why would you want to?

Doc
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: carnuck on March 09, 2012, 12:16:50 AM
Are you close to Seattle? I have an '83 J10 intake/exhaust and BBD carb (all functioning) for $30
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: 85AmCfreak on March 12, 2012, 10:21:22 PM
I am not using the EGR interconnect I am in New York its a ways away from Seattle LOL but thanks anyway
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: BenM on March 13, 2012, 02:24:55 PM
You may have to grind down the riser mounting on the bottom of the intake a bit. The later exhaust sticks out a bit further than the 80, but I don't believe it affects the intake so much as the power steering pump bracket.
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: 85AmCfreak on March 17, 2012, 06:49:23 AM
So the 85 power steering pump bracket is not going to bolt up to the 80 intake??
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: BenM on March 17, 2012, 08:21:47 PM
Quote from: 85AmCfreak on March 17, 2012, 06:49:23 AM
So the 85 power steering pump bracket is not going to bolt up to the 80 intake??
It should be fine on the intake, the mountings there didn't move; an 80 bracket won't fit over an 85 exhaust without cutting. Sorry, not sure what mix of parts you're using for everything
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: carnuck on March 17, 2012, 10:13:31 PM
The '80 intake is conjoined to the exhaust manifold. Later intake flows better.
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: 85AmCfreak on March 20, 2012, 05:08:17 AM
Quote from: carnuck on March 17, 2012, 10:13:31 PM
The '80 intake is conjoined to the exhaust manifold. Later intake flows better.

Your kidding....I would think it was the opposite way.
Title: Re: 1980 intake manifold 1985 exhaust manifold???
Post by: BenM on March 20, 2012, 11:20:45 AM
The aluminum intake and exhaust combo was actually redesigned by AMC to be better flowing, not just lighter. There is a wider radius turn down on the exhaust manifold for less back pressure and the aluminum intake flows quite well, even with the heater sticking up below the carb. I recall even seeing flow bench numbers on that at one time, but I can't remember where.