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  #16 (permalink)  
Old 11-09-2012, 11:12 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
none of the Crane hyd cams are speced at .006" lifter rise.

.004" or .0042" is common for the Crane Hyd cams.
On some the advertized seat duration check spec is not stated at all.

i have never seen one with a published .006" spec.

But of you really want to know you can call Crane Cams tech line . They do kn ow and can tell you
what the cam duration at .006" lifter rise is. (There is a typical approx 8deg difference)
Or you can measure it yourself when you degree in the cam in the motor.

If you want to see how a comp cam stacks up when measured at .004" you can do that too.
When measuig at .004---.006" you must be very accurate with the dial indicator and degree wheel.
But you will see....for your self and now can make a valid comparision.

You do have a valid point in that many many people bite off more than they can chew.
By buying the latest fastest action cam for their street car that will see way more idle time and operation at less than 3000 rpm than it will ever see a rpm that can actually benefit from a XE or voodoo cam.

I like the Crane HMV designs, for a lot of reasons. When you make a really good wheel, you don't need to re-invent it every week.
Comp and Crane and most other big box cam companies use adv. durations that vary all over the place (measuring point)- and many times its not published as such. Also, because its not published as such many times their own tech line can't tell you that.

Don't ever think that not having something published to the contrary means you're correct in your assumptions.

I believe Isky, and Schneider, and Jones, and a few others are all consistent when they give adv. numbers but I could be wrong about that.

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  #17 (permalink)  
Old 11-09-2012, 11:32 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
none of the Crane hyd cams are speced at .006" lifter rise.

.004" or .0042" is common for the Crane Hyd cams.
On some the advertized seat duration check spec is not stated at all.

i have never seen one with a published .006" spec.

But of you really want to know you can call Crane Cams tech line . They do kn ow and can tell you
what the cam duration at .006" lifter rise is. (There is a typical approx 8deg difference)
Or you can measure it yourself when you degree in the cam in the motor.

If you want to see how a comp cam stacks up when measured at .004" you can do that too.
When measuig at .004---.006" you must be very accurate with the dial indicator and degree wheel.
But you will see....for your self and now can make a valid comparision.

You do have a valid point in that many many people bite off more than they can chew.
By buying the latest fastest action cam for their street car that will see way more idle time and operation at less than 3000 rpm than it will ever see a rpm that can actually benefit from a XE or voodoo cam.

I like the Crane HMV designs, for a lot of reasons. When you make a really good wheel, you don't need to re-invent it every week.
The recent Crane "Z cams" have a very intense fast action lobe with
lots of lift area under the curve and really push the limits of cam lobe design.
They are at least as radical a design, probabaly more so, than the XE cam lobes.

Yet you do not hear of premature cam-lifter failure with these Crane Z cams.
Again IMHO quality control is paramont with any all of these cam designs,
and correct install and break in method is critical.

I have not tried one of the Crane Z cams , yet.

I have only had one comp cam fail on me and it was a used solid lifter racing cam that I reinstalled in a different motor. At My risk. It did not fail right away.
IMHO you have about a 50-50 chance when moving a cam from one motor to another motor, even with new lifters, on SBC's and BBC's.

Mopar engines seem to be much more tolerant of this.
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  #18 (permalink)  
Old 11-09-2012, 11:40 AM
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Quote:
Originally Posted by ap72 View Post
Comp and Crane and most other big box cam companies use adv. durations that vary all over the place (measuring point)- and many times its not published as such. Also, because its not published as such many times their own tech line can't tell you that.

Don't ever think that not having something published to the contrary means you're correct in your assumptions.

I believe Isky, and Schneider, and Jones, and a few others are all consistent when they give adv. numbers but I could be wrong about that.
I had no problem getting the .006" hyd cam duration specs from Crane.

It's an eye opener.

I believe Isky uses .007" on some hyd cams. Some Isky have a different spec or the opening and closing side. Another eye opener.

You are tying to compare apples to oranges unless you sue the same check spec

The Isky Hyd Mega Cams have a very intense fast lobe design yet again you do not see the cam lifter failures.... Quality counts.
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Old 11-09-2012, 11:45 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
I had no problem getting the .006" hyd cam duration specs from Crane.

It's an eye opener.

I believe Isky uses .007" on some hyd cams. Some Isky have a different spec or the opening and closing side. Another eye opener.

You are tying to compare apples to oranges unless you sue the same check spec

The Isky Hyd Mega Cams have a very intense fast lobe design yet again you do not see the cam lifter failures.... Quality counts.
isky lifters fail,, I've never had any luck with their lifters
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