I agree ,have read similar statements,i remove the flaper on the ex manifold ,but run a muffler on pas side that is a bit more restrictive this helps keep a hot intake floor. hard start hot has no bearing onheat ed exhaust threw the int pasage

Best Gaskets makes the gaskets with the small heat opening.


54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

I have been driving the car with the blocked risers and it runs fine.The paint shows no discoloration at all.The only problem I am having is a hot start difficulty I believe is due to the aluminum spacer I am running under the carb.I was thinking of switching to phenolic.Any ideas about thay?

As I understand it, the restricted (smaller ) hole gaskets were originally supplied for trucks.  I bought a set from & believe they are also still available from Gasket City in Hamilton Ontario Canada. @ www.gasketcity.com or at 1-888-335-4686. ( as advertised in Hemmings Motor News) 
Interesting that this subject comes up now.  We are often lead to believe that totally blocking off under carb heat is the way to go, for performance. However, I just read an article in the Sept. 2013 issue of Street Rodder which touches on that issue. The article was actually part two of an article on early McCulloch superchargers. Maybe the following is out of context, but here it is. Under a sub heading of Heated Intake Air- " Heating the intake air is a good idea on a road going engine with a wet intake manifold (one that transfers air & fuel)... a warm manifold prevents carburetor icing. But a warm intake also keeps  fuel suspended as a finely atomized mist that more readily burns. It also improves combustion efficiency by accelerating the combustion rate"  That statement seems to contradict a commonly held belief..  Any comments?         


Paul

Most of the TBird suppliers have the restrictive intake manifold gaskets. I get mine from CASCO.   I tried to get some from Carpenters, they don't have them.  Mac's might have them.


54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Tee Bird Products sells a good intake manifold set with restricted heat passages.  They work very well, keeping the manifold from discoloring and also suppling enough heat to stop icing problems, even up here in the western NC mountains.

Larry

I bought my restricted intake gaskets from Larry's T-Bird and Mustang.(local for me) Been there for about 6 months without discoloring the paint. I have also wired open the exhaust thermo. I have one of those 1/4" thick insulators under the carb to keep the fuel from getting too hot. Drove in 100*+ temp last weekend with no trouble...good luck...

56 Vic, B'Ville 200 MPH Club Member, So Cal.

I have a 3x2 set up and was havin issues with carb heat soak, I fabbed a very similar rig-eventually ended up drilling a hole and made like a restricter plate. Has been in place and worked for a few years now.
Dunno if it was a good idea or bad, but it works so.....

Mike Rizzo

1963 F100 "Rudy"

Daniel Island, SC

Thank you.I live in Florida where we get lots of damp,but not much cool!

If you drive in a cool, damp climate, you will probably experience carburetor icing and poor low speed driveability.  If you are after maximum performance, the plugs will do the job.

John - "The Hoosier Hurricane"