Really? I find that quite odd. I'd imagine if you have a 600-700F manifold, it shouldn't be too much of a problem to get 300+F air. Well, after I test the exhaust manifold temp warm up times, building the box/heat exchanger would be the next step to see how hot we can get the air to.
Thanks for the info. That means the heat exchanger will definitely need to be made with much thought put into it.
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