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73duster
New User
| Posts: 11
| Joined: 12/03
Posted: 07/20/04
11:02 AM
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What are the advantages and disadvantages of roller camshafts, and how do they compare do "regular" camshafts?
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Posted: 07/23/04
08:32 PM
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roller cams have rounded lobes and use roller tappets. this in turn induces less wear on the valve train. less friction = more power If I were a machine, I'd be a lot happier.
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drmopar
Enthusiast
| Posts: 456
| Joined: 02/08
Posted: 09/04/08
07:03 PM
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Yea the less friction is worth about 5 horse power.
The real power gain is in the lobe design.
However you really have to question the cost for a street car when a solid cam can make similar power for a fraction of the price.
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AndyF
New User
| Posts: 27
| Joined: 12/08
Posted: 12/07/08
10:30 AM
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If you follow along with the Project 505 series of engine articles that I've been writing you'll see that when we changed from a flat tappet cam to a roller cam we picked up about 60 hp.
The roller cam allows a lot more duration at higher valve lifts even if the seat duration stays about the same. Also, you can get a lot more lift with the roller cam since you can run a lot more valve spring pressure.
If you're going racing and need to make serious power then a solid roller cam is the best way to go.
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