Originally Posted by davis419b
JP, I think that is too fat, 154,s would be my chioce with a 496. I ran a 1050,1150 and 1250 on my 565 with never bigger than 165,s. Call Rupert and ask him whatever he tells you will be a little fat!
The reason you can use a smaller jet is because you have a larger motor that is pulling more air through the carb at a faster rate and this rate (velocity) will determine what jet you can use. I think you will find that, in general, the smaller the motor the larger the jet has to be with a similar sized carb. But that's just my experience. In the end, it doesn't matter what I, Rupert, or anyone else says. The motor will tell you what it wants. All you have to do is listen to it.
George