There's a local fella that has a pretty nice little roadster. He's a heck of fella. I'd like to help him with his carb problems but I don't know much about 94's. Long story short...... He bought 6 94's, sent them to Charlie Price, took FOREVER, had his attorney send him a letter, got them back. Look really great on the outside but I'm guessing they are **** on the inside....based on threads about Charlie...here......anyway....not wanting a debate on good ole' Charlie. Then, he took them to the local "expert" to set them all up.......now it's running rich...... 350 SBC said it's running a Petronixs dizzy fouling plugs back fires when first starts up 6 94's but only the two center ones are hooked up after he runs it to, say a cruise-in, it has some raw gas in the pipes i don't think it has a hot cam or anything...just a mild 350 the "expert" said to bring it back to him and he'd solder up the jets and drill a size in them that would be right..... do they make different size jets for 94's........what sizes should i start with.... give me some places to start... thanks, man!
Find out where the jets are NOW - if they're reasonable your problem lies elsewhere - PV as mentioned or excessive pressure blowing the needles off the seat - cracked float possibly - misadjusted float - dirt in seat - etc. Look down carb while running - any drips of raw fuel off the booster (or anywhere) indicates problems. By the sounds of things I would verify everything ELSE before fiddling with the jets - leave those for last. BTW an electronic ignition ought to have no problems firing a RICH mixture - (to a point) - which would also make me check the ignition timing.
What kind of intake is he running? Does he have risers under the carbs? Previous answer is correct, the backfire could take out one or both power valves if they even have any. Don't do the solder up and redrill thing that is not very accurate if you find the jets are to fat, I give you some jets to replace. Does it idle ok? Anyway, get back with some answers here and I think you can be helped. the ****ster
check that the 'expert' put the power valve in and not the spark arrestor. as with most 94 rebuild kits you get the power valve and the spark arrestor and they look similar and have the same thread so one will fit where the other does. dont ask how I know!
"Spark arrestor" = spark economizer valve They actually look real similar but the economizer won't seat in a power valve hole if I remember correctly (or vice versa?). They work backwards from each other so if anything I think he'd have a flat spot if they were switched. Is that what you had, Flatoz? For non-Ford applications any economizer should be plugged. I hope he isn't using the 94's spark advance port on a Chevy distributor, it is for Ford Load-a-matic's and will give some crazy advance curves! On old 94's I've rebuilt the emulsion tubes are always plugged. They sit vertically in wells in the venturi area. They look like a tube-within-a-tube. **** gets stuck up in between the two and bleed air can't mix with fuel, results in a rich mix at off-idle speeds especially. The outer tube has real tiny holes that need to be clear of any ****. If these are 8BA vintage 94's (15/16" bores) main jets should be in the low 50's, maybe 53's. Lots of people sell the full range of jets, I wouldn't solder and drill, it's a **** shoot.
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