Fouling plugs, could carb be overfuelling?
Hi there guys at the moment i have a stock 351 with single plane manifold and a 600 holley,i put the manifold and carb on about 6 weeks ago, before that it was running the 2v manifold and a 350 Holley, occasionally it would foul up a plug or 2 but recently it has gotten worse, and when it drops to 7 or even 6 it runs like crap (naturally) Now this engine has been great and has it's original internals, i pulled the plugs out today and inspected them, a few of them were wet, but it didn't seem oily, more fuel, is it possible that the carb is over fueling my engine, causing the plugs to misfire and foul? Is it possible that the carb is washing the bores and making oil consumption increase?
The exhaust system has decided to crack as well in the last 2 months where it bends under the car where the fire wall is, because of the twisting motion etc , can this decreased back presssure cause it to run richer as well?
My plans are get a brand new exhaust system in a few weeks and to put a fully worked Clevo in at the end of the year, i just need a few more months out of this one, but there is nothing worse than driving it 1km down the road and then it decides to drop a cylinder, so annoying.
Should i get the car onto a dyno so they can test the a/f ratio and change jets / power valves etc in the carby?
Any suggestions would be fantastic, thanks in advance - Mark