Import Guy, Looking for Cam Advice
Thread Starter
Staging Lane
Joined: Sep 2010
Posts: 94
Likes: 0
From: Austin, TX
Thanks again for the valuable advice Duffster and everyone. I believe I understand the advice just as you intend it. I really like the idea of the 224 cam with .56x lift and 918 valve springs. Should be just the combination I am looking for.
I'm playing with that link to calculate overlap. It looks like I get -4* with a 114LSA. It would take 117LSA to get to -10*. What would change powerband-wise going from 114 to 117LSA? I read somewhere that -10 overlap is a good goal to shoot for when concerned with streetability.
I'm playing with that link to calculate overlap. It looks like I get -4* with a 114LSA. It would take 117LSA to get to -10*. What would change powerband-wise going from 114 to 117LSA? I read somewhere that -10 overlap is a good goal to shoot for when concerned with streetability.
There is still overlap with a -10* cam, just not at .050 lift. Lobe profiles also have a lot to do with it. Also, that rule you're following is a very blanket statement, and seems to not consider very much else. Engine size, compression and tune are all large factors in being streetable, and the cam profile is a consideration on these and more. Larger engines need bigger cams, so they need a bigger valve events. Designing a cam with a certain amount of overlap may compromise more important valve events, mainly intake open and close. If the valve events are close for the intended application, which have a lot of factors, then I wouldn't be too concerned with the amount of overlap.
