Hello to the list,
I recently had a rebuilt early MGB 1800cc, 3 main bearing engine installed
in my 62 MKII MGA roadster. Everything has gone well and the car runs nicely,
with the exception of one thing that needs attention. I have some gas that
drips from the bottom of both carburetors after I shut the car off and park
it in the garage. The smell of gas is distinct and the odor lingers for an
hour or so after shutoff. I assume the pressure built up by the fuel pump in
the line causes the slow but steady drip until the pressure is gone. There is
only a small amount of gas that is involved. And because the amount is small
it probably evaporates almost as quickly as it leaks. I put a pair of SU's on
this engine that were left over from the previous engine (1622 CC). I assume
these that are currently in use are the 1 1/2 inch variety. I know there are
also 1 3/4 inch SU's out there also. Were these larger carbs standard on the
larger 1800 cc "B" engine ? I have the carbs that came on the rebuilt motor
but they are not rebuilt and since they were questionable, I went with what
came off the previous motor. I didn't know their condition either, but they
physically looked to be in better shape. Would a pair of 1 3/4 inch SU's give
me any appreciable performance boost? If the carbs that came on the rebuilt
motor are actually the larger models I will have them rebuilt instead of the
ones I am using now. What cars were the larger SU's normally used on? Happy
Holidays, and Merry Xmas to all on the list.
Bill Dillstrom
1962 MGA MKII roadster
?
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