another cam question

[95rayburn]

My friend is lookin at a 4/7 swap. Do many people use these and is there any advantages of using these cam's

[RCJ]

I use them in my l/m motors.I've never dynod them back to back but I wouldn't expect more than single digit hp numbers if that.They load the crank different and are suppose to be easier on the bottom end.

[dave41]

clears up rod interference on num. 7

[95rayburn]

clears up rod interference on num. 7

And what's that mean?

[dave41]

build a longer stroke engine , you will rod to cam interference.

[over4T]

The 4-7 swap, although relatively new to racing, is nothing new for GM engines. It's simply the firing order for the old Oldsmobile engine introduced as a 303 c.i. in 1949 and like RCJ said it's doubtful that you'll see much, if any, difference in horsepower. I'd direct my efforts to something more substantial.

[50j]

Some people feel like they are a little bit "smoother" on the track. Take that for what it's worth since on-track feedback can be subjective to other variables.

[w2racing#2]

My friend is lookin at a 4/7 swap. Do many people use these and is there any advantages of using these cam'sKeep in mind that u should use headers designed for the altered firing order if u wish to obtain maximum benefit from the 4/7 swap cam.

[perfconn]

Only true if you use tri-y headers.

[w2racing#2]

Only true if you use tri-y headers.My bad, I should have clarified. Thanks for correcting me.