my engine is a L31 383 stroker, comp cams xe282hr cam, edelbrock performer rpm air gap intake, Demon 750 carb. as the weather gets colder in New England, I have to really let it sit on the fast idle and get some heat into the manifold and carb for fuel atomization. the air gap intake definitely isn't helping my situation with the obvious gap of air paired with not having an exhaust crossover. This is making me want a more street friendly/ cold weather friendly intake. Hood clearance is of no concern.

I was considering getting the regular edelbrock performer rpm intake manifold but decided to check out other brands beforehand. I see Weiand offers a low rise and high rise warrior intake, both with exhaust cross overs and no air gap.
1. https://www.holley.com/products/engi...e/parts/8150BK
2. https://www.holley.com/products/engi...e/parts/8120BK

My concern is that the powerband of the high rise with longer runners suits my stall and cam better but I don't want another tall intake that takes forever to get heat into it. Is this a reasonable concern or does it not really matter between these two intakes since they both don't have an air gap and both have an exhaust crossover?

 

Since the intake is aluminum and not an air gap, I'd think that the heat would soak through the intake at a pretty similar rate, either style.

 

The Performer RPM does not have exhaust cross-overs.
The Weiand does if I remember correctly...

 

The RPM manifolds DO have the exhaust heat crossover provided they are for a traditional cylinder head and not a Vortec. The Vortec one has a hot coolant crossover.

 

'Sorry, I AssUMed that it didn't since the Performer RPM for the small block F#rd doesn't have the exhaust cross-overs (I wonder why that is)...

 

That is odd that Edelbrock decided to do that on the SBF manifolds. The RPM is designed to be a high performance street manifold. With a carb, cold weather drivability gets wrecked without some kind of plenum heat.