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HS4 to HIF inlet manifold question
- Thread starter hottvr
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As far as the spacing and bolting-up requirements go, they are interchangeable.
Other considerations are the threaded fittings - are they the appropriate size for your anti-pollution equipment (if used). Also the exhaust manifold "ears" should be the same thickness as the intake manifold "ears" or you will need to shim them to prevent vacuum leaks. I think there is about an 1/8" difference between the HS4 and HIF4 manifold ear thickness. These are minor considerations though, you should be able to create work-arounds.
Other considerations are the threaded fittings - are they the appropriate size for your anti-pollution equipment (if used). Also the exhaust manifold "ears" should be the same thickness as the intake manifold "ears" or you will need to shim them to prevent vacuum leaks. I think there is about an 1/8" difference between the HS4 and HIF4 manifold ear thickness. These are minor considerations though, you should be able to create work-arounds.
Bob Claffie
Jedi Knight
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I swapped from HIF to HS4's without any fitting problems. Only glitch is the connecting shaft between the carbs is a different length. The HS4's requiring a longer shaft than the HIF's. Bob