dual intakes..??

[claybill]

on the EDMUNDS dual intake there is a water passsage tube integral with outer part of the intake......WHAT IS THIS FOR?...ADVANTAGE? ( currently on ebay)

offy and many other intakes dont have one....IF it is for warming up the intake for better starting , sems of no use cause the engine is always cold when starting. after warm-up there is plenty of heat from manifold and motor. why the water

tube?

bill

[martybose]

My mechanic said that it is there to aid in fuel vaporization. Most of the Edmunds manifolds have rather long runners, and since there isn't any exhaust heat riser connection, the manifolds are rather cold. It just helps you get a good air/fuel mix into the engine.

Mine is hooked up with water from below the heater control valve, then back to my non-stock thermostat housing; most would return to the fitting in the top of the waterpump housing.

Marty

[blueskies]

I'm running a vintage Edmunds water heated intake on my 230.

The purpose of the water heat is to keep the intake the same temperature as the rest of the engine. Most cars have some form of manifold heat to keep the intake warm, and with the Edmunds dual intake, there is no provision for the factory type exhaust manifold heat.

The purpose of the manifold heat is not only to aid in warming up the engine after a cold start, but to keep the intake from getting too cold after the engine is running. As air moves through the intake, it cools and causes the air/fuel mixture to condense on the cold surface. Sometimes it is possible for the intake to actually ice up. If the air fuel mix condenses, it can cause the engine to load up and run rough. This won't happen with the Edmunds intake because it always stays the same temperature as the coolant in the cooling system.

The pipe cast into the intake is connected to the heater hoses, so coolant circulates even if the thermostat is closed.

I'm running a pair of Holley/Webber carbs, and do not have the chokes hooked up at all. Even when the air temp outside is near zero degrees, the car will start right up, and by the time I have the car backed out of the garage, it has warmed up enough to idle on it's own. The coolant in the block comes up to temp pretty quickly, warming the intake at the same time. Works pretty good...

Pete