Richard Sweet
Well-Known Member
I'd like to start this thread discussing water flow through intake manifolds. For various reasons, we might alter our I.M.'s and those gaskets.
For example, on my 4 barrel, 273, I used a gasket without a passage for the exhaust heat riser into the stock, cast iron, single plane I.M. because I was getting carb boil, even with a 1/4" insulator gasket under the carb. (Now the center passages are very cold while the end passages still get warmed by the water flowing through the I.M. This is not true. I was mistaken. See my post #23).
I think I've heard of I.M.s with water flow through the heat riser passage, which sounds like a good idea. Not too hot and not too cold. So how could I modify my cast iron I.M. to accommodate this better idea?
Related discussion welcomed.
Thanks, Richard
For example, on my 4 barrel, 273, I used a gasket without a passage for the exhaust heat riser into the stock, cast iron, single plane I.M. because I was getting carb boil, even with a 1/4" insulator gasket under the carb. (Now the center passages are very cold while the end passages still get warmed by the water flowing through the I.M. This is not true. I was mistaken. See my post #23).
I think I've heard of I.M.s with water flow through the heat riser passage, which sounds like a good idea. Not too hot and not too cold. So how could I modify my cast iron I.M. to accommodate this better idea?
Related discussion welcomed.
Thanks, Richard
Last edited: