My friend is lookin at a 4/7 swap. Do many people use these and is there any advantages of using these cam's
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My friend is lookin at a 4/7 swap. Do many people use these and is there any advantages of using these cam's
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.
clears up rod interference on num. 7
And what's that mean?Quote:
Originally Posted by dave41
build a longer stroke engine , you will rod to cam interference.
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.
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.
Keep 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.Quote:
Originally Posted by 95rayburn
Only true if you use tri-y headers.
My bad, I should have clarified. Thanks for correcting me.Quote:
Originally Posted by perfconn