Classic Engine Tech 1967 - 1981 Engine Related

camshaft question. Please help

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Old May 4, 2005 | 05:47 PM
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detroit1994z28's Avatar
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camshaft question. Please help

Bought a solid lifter camshaft the cam specs are
lobe separation 106.0
gross valve lift .532. .555

Does anybody know if this camshaft is aggressive or will it sound aggressive. Does anybody have similar sound clips of this cam. I'm really not to fimilar with camshafts. I just wanted to know if this is going to sound really aggressive - Mike
Old May 4, 2005 | 06:12 PM
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damnyankee36's Avatar
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From: Alamogordo, NM , USA
Re: camshaft question. Please help

There are enough specs listed here to determine that this is a racing cam that will sound wicked, but will have lousy street performance. Off idle torque will probably be lower than street cam. If you have an automatic, it will be hard to idle the motor at normal RPMs. The RPM would have to be set at least 1000. You would need about an 11 or 12:1 compression ratio just to have any type power. The lobe separation is what determines a lot of these characteristics along with the duration. I wouldn't recommend it.
Old May 4, 2005 | 06:24 PM
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detroit1994z28's Avatar
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Re: camshaft question. Please help

It's only going to be like a weekend type car. It's a 67 camaro with a 355. Dart heads with 10/1 -2 compression with this camshaft. I know to run a 3,500 torque converter. Would the camshaft still make awesome power??
Old May 4, 2005 | 06:46 PM
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Re: camshaft question. Please help

I would delete your post in Advanced tech. Cross posting is a no-no and you didn't provide much information. First look at the part number on the front of the cam and provide that to us. Typically cams with 106 deg lobe seperation will have a rough idle and have good low/midrange power. The intake valve closes sooner than a cam with the same duration but wider lobe seperation. The earlier closing intake valve builds higher cylinder pressure and provides more torque. So while the idle will be rougher, it can be a good choice when high vacuum isn't a priority. If you can help out with a part number we can better help with determining rpm range (via duration numbers) and help with your converter selection. But yes, it should sound pretty good as a rule.
Old May 4, 2005 | 08:09 PM
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damnyankee36's Avatar
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Re: camshaft question. Please help

Originally Posted by detroit1994z28
It's only going to be like a weekend type car. It's a 67 camaro with a 355. Dart heads with 10/1 -2 compression with this camshaft. I know to run a 3,500 torque converter. Would the camshaft still make awesome power??
That sounds better. The engine combination might not be ideal, but depending on how well the heads flow, it will work. Just be ready to have to rev it it get it moving! Don't forget to choose wisely on the exhaust/mufflers too. That will obviously have an effect on the sound.
Old May 7, 2005 | 08:52 PM
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sheppard00's Avatar
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Re: camshaft question. Please help

what is the duration on that cam. it might not be as big as you think.
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