Hot carburator

[Stefan B.]

Hi, I have the problem with my 1963 R2 the engine always after 30min or so. Now, looking for the reason I found out that the carburator gets very hot so that the gasoline is almost boiling in there. Does anyone have the same problem and/or have an recommendations what I can try to isolate it so that it does not get that hot? 

[rhusak]

Stefan.. This is an issue we almost all deal with.. Indeed the gas is boiling in the carburetor and can actually cause vapor lock.

One big help is ilf you can find and use fuel with no alcohol... Makes a big difference... Beyond that you will have to block the cross over in the intake during hot weather.. Perhaps look at an electric pump with increased pressure which may also help some... 

Gasoline is a real problem anymore... I know some who put a quart of oil in a full tank of fuel which seems to help! I have the added issues of living at 9200 feet and no alcohol fuels.. Just hope for cool days..

 Good luck with it.. Drive that beautiful car..

 Ron Husak

[Kodjo]

But, if you live in a relative cool climate, normally, even with alcohol in the fuel, you should not get boiling gas in the carburator.

My Avanti did have a sporty cam and ran a bit hot. I did fit a thick gasket between intake and carburator, that solved the boiling.

Also, check the timing. If off (to late if I remember well), the engine runs hotter then intended.

 

[wildfelr]

RQB3263/81/305  .... very interesting ...two more easy things to try ... (1)   add 1 or 2 more carburetor base gaskets to act as insulators...    (2)  check ignition timing  at idle should be about 6 or 7 degrees advanced  .... check for vacuum leaks ....and yes remove and block off intake manifold head riser,  this may require removal of intake manifold or there may be a block off kit available for your application.... i also drill 6  3/16holes thru my thermostat to allow coolant to pass at all times. good luck and keep in touch .....BILL in Florida where we dont need heat risers !!