340 Stock Camshaft

dodge freak said

I have two Holley 750's right now. A down leg booster and one annual type booster 9379-that seems to help low speed power-which already was great.

My mileage was 10 mpg with the 318 heads, then with the 360 heads and a single plane Holley street Dominator intake, it went to 9 mpg. Now with the RPM intake its back to 10 mpg, maybe 10.5 and has more power than ever.

My cam is 30,000 miles, 6 years old, so I guess my chain is loose-timing does move at high rpms, 4000- no race motor. The cam must have seen its better days too, so I might be doing a in the car cam swap soon. Done it before, same car. Cam slips just out without removing the grill-no A/C.

I just need to decide what to get :geek:

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So basically are you trying to improve gas mileage?

If so I guess the smaller 650 class carbs would do you justice and the cam that I installed might not be to bad a deal either. From your top post you almost described my cam that I just installed so that's what got my attention. Bobby and I did some research on his computer and found that .446/.446 lift cam was the stock 340 cam. So the cam I installed is close to that BUT I don't know the true LSA on the 340 cam. The cam that you found on ebay is nothing but a brute for a smaller motor. I found that .474 lift is to much on my motor. The main thing is to have every part work with each other cam, carb, intake, heads, need to be in the same RPM range. That is what I did with my motor recently. It runs better than it ever has.