Thread: Cam Choices

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P.S. The cam I chose is ground on 110* lobe centers. If you want a little more lope to the cam, call up Crane and have them grind it for you on 106* centers but retaining the 30* ABDC intake closing point. You'll give up some manifold vacuum, but hey, there's no free lunch. You have to give up something to get something.

That cam is too small thanks for the thought though, it just looks like a stock 350 cam with a little more duration and a tighter lsa, wanting a cam that will make good power to about 6200 rpm's and work with a 24-2600rpm stall.

O.K., then you'll need more static compression ratio. I would resist the temptation to do it with domed pistons though. The dome gets in the way of the flame kernel as it is travelling across the chamber. Do it with flat-tops and a smaller chamber.

The motor you were describing ran good because you had optimized the DYNAMIC compression ratio with high static compression ratio and a relatively short cam with an early intake closing point.

I think the only way you're going to be able to do what you want to is with 64 cc chambers or use the 56 cc heads with a dished piston. With 64 cc heads and flat-tops, you'd be at 10.44:1 and could run pump gas with the tight 0.040" squish and a cam such as this.....(112 LSA)
http://www.cranecams.com/?show=brows...tType=camshaft

Originally Posted by techinspector1

O.K., then you'll need more static compression ratio. I would resist the temptation to do it with domed pistons though. The dome gets in the way of the flame kernel as it is travelling across the chamber. Do it with flat-tops and a smaller chamber.

The motor you were describing ran good because you had optimized the DYNAMIC compression ratio with high static compression ratio and a relatively short cam with an early intake closing point.

I think the only way you're going to be able to do what you want to is with 64 cc chambers or use the 56 cc heads with a dished piston. With 64 cc heads and flat-tops, you'd be at 10.44:1 and could run pump gas with the tight 0.040" squish and a cam such as this.....(112 LSA)
http://www.cranecams.com/?show=brows...tType=camshaft

Oh,come on Richard you sound like a "broken record" now.

Originally Posted by erik erikson

Oh,come on Richard you sound like a "broken record" now.

Erik, coming from you, I'll take that as a compliment
You may have noticed that I don't respond to every thread, because my area of expertise is limited to certain areas of car building, but I'm pretty sure that engine combinations is one of those areas.
You know that I value your knowledge and opinion, do you agree that I'm giving the correct advice in this instance, or is there something different that you would advise?

Originally Posted by techinspector1

Erik, coming from you, I'll take that as a compliment
You may have noticed that I don't respond to every thread, because my area of expertise is limited to certain areas of car building, but I'm pretty sure that engine combinations is one of those areas.
You know that I value your knowledge and opinion, do you agree that I'm giving the correct advice in this instance, or is there something different that you would advise?

We where only five degree's different on our cam recommendations.
I would recommend that he favors the exhaust by 6-8 degree's.