Manifold heat cross over physics and benifits

I think you hit the nail directly on the head right here.

How do we get the best of both worlds?

TBI and MPFI are sweet as pie but expensive and challenging as hell to most. Lots of economical TBI don't flow much over 300 - 325 HP. Obviously TBI still has some wet manifold issues but they are much less.

How the heck do we get a cold start and driveability, longevity of engine rings and cold air charge, all wile running a carburetor?

Maybe a heating element plate molded into the floor of the intake under the carb of some sorts? With a thermostatic operation based on engine temp / coolant temp?

Hmmm. Yessss its all becoming :violent1:now.. Air gap intake with a plate in the floor which gets toasty for 10 minutes or so, then kicks off.

I used to work with these a bit in an R&D de-icing system.

340-4spd said

I'm convinced manifold heat is only really important for cold driveability and associated quicker warmup in cold climate. I struggled for years getting my 440 to run right during the summer where it would constantly be suffering the carb boiling and hard starting issues associated with heat and ethanol in the fuel. The thing that finally cured it was new intake manifold gaskets with the crossovers blocked. It's a little longer to idle right until 10-15 minutes or so after startup, but then again it always was.

That was the only difference apart from curing the main problems(s).

Click to expand...