Tuning For Detonation
Cool, still need the flapper to heat the bottom on the manifold.
Again, a complete myth for a performance engine. Manifold heat needs to be blocked off on peformance engines. That's why there are gasket sets with block offs included in some sets.
Cool, still need the flapper to heat the bottom on the manifold.
This is both correct and incorrect. Lemmie splain, Lucy.
As we all know, combustion causes heat. In a high compression, high performance engine, heat is the enemy. The more heat the incoming air/fuel charge has, for example makes it more difficult to combat detonation in a pump gas situation. So, for this build.....and lots of similar ones, blocking manifold heat is not only correct, but very beneficial to the engine.
Now, were we talking about a stock or mild build I would tend to agree with you. Also, there's the argument for people using headers or Dutra Duals. No manifold heat there.....unless they go to the trouble to make a coolant box under the intake and most don't and they see zero side effects, except maybe a longer warm up period. But they do see increased performance due to keeping heat off the intake charge. All of the "fuel atomization" crap you read and hear about putting heat in the manifold is really only beneficial before an engine reaches it's intended operating temperature. Once there, there's no need for it and it actually costs power and mileage, too.
