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Stupid Belt Question


paulram

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Confirmed... Air pump with no ac.  Looks like the thermal reactor manifold with tubing hooked into the air pump. When I remove all that crap, do I need or can i remove the nozzles in each of the ports on the exhaust manifold? Is that just a waste of time?

 

I also read on another post you and just seal the large threaded hole with a screw plug.

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Leave the nozzles and plug the port.  Or switch to a tii manifold or a header.

+1

And Jim's old manifold -- his last photo -- is like the majority of exhaust manifolds in carb'd cars. It's an air injection manifold, but it's not a thermal reactor manifold. Any car with an air pump had the four air injection nozzles in its manifold and a fitting on that manifold's nose to accept the air coming from the air pump. If you, indeed, have a thermal reactor manifold (all '75 U.S. cars and the California version of '76 U.S. cars), you would ALSO have, I believe -- as I've seen precious few CA cars, even fewer with thermal reactors still in place -- a fitting at the rear of the manifold that feeds or is fed by the thermal reactor apparatus. In the latter case, you'd have to plug two holes...or get rid of that thermal reactor manifold!

(I'll be honest, I'm not certain anyone has ever "flow-tested" a thermal reactor exhaust manifold, comparing it to a plain old air injection manifold. But, not fully understanding how it works, it sure sounds to me like an undesireable manifold! I would suspect that all that "thermal reaction" gets in the way of the exhaust!)

Good luck,

Steve

1976 2002 Polaris, 2742541 (original owner)

1973 2002tii Inka, 2762757 (not-the-original owner)

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