sleepyhead416
Well-Known Member
Only number I can read is 69 16 89 HMV ???NC S/B HYD I think
Old crane cam help
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sleepyhead416
Well-Known Member
This came out of a 340 I think it HYD Had no heads or lifters.
Have you checked the lobes for any idea of lift?
Any idea of what year (vintage) the cam is from? (the cam - not the engine)...
Any idea of what year (vintage) the cam is from? (the cam - not the engine)...
The HMV Crane grinds: Early -mid 80's hyd tappet split pattern wide lobe centers (112 usually). Still make the same grinds today,under a different Crane name. The six digits, went nowhere.
If you have a vernier caliper, measure from the tip of the nose of the lobe to the back of the lobe.
Then measure across the narrow side of the lobe.
Subtract the difference, then multiply by 1.5. that should get you to the ball park of advertised lift at valve.
Make sure to check both intake and exhaust lobes to make sure that they are not different. Also try to check at least 3 of each intake and exhaust lobes to make sure that the readings are close.
Then measure across the narrow side of the lobe.
Subtract the difference, then multiply by 1.5. that should get you to the ball park of advertised lift at valve.
Make sure to check both intake and exhaust lobes to make sure that they are not different. Also try to check at least 3 of each intake and exhaust lobes to make sure that the readings are close.
The wide split patterns, are the original HMV based grinds...
Like Mr. A-Body-Bomber stated,
Crane HMV = Hydraulic Max-Velocity
The most popular Grinds were
* HMV-262
* HMV-272
* HMV-278
A 'dual-pattern' profile that emphasizes; good Low-End and very good
Mid-Range torque.
And a Camshaft that could provide a real-low Idle. Great for a 'Daily Driver'
with the best Power-Range at 2600 - 3000 RPM's.
Range ....... 1800 - 5400 RPM's
Max .......... 6000 RPM's
One of my old sheets on the HMV-272
Lift ...................... .454" Intake / .480" Exhaust
Duration ............... 272* Intake / 284* Exhaust
Duration @ .050" ... 216" Intake / 228* Exhaust
Center-Line ........... 112*
Overlap ................ 54*
Intake {Opens} BTDC ...... 25*
Intake {Closes} ABDC ...... 67*
Exhaust {Opens} BBDC .... 75*
Exhaust {Closes} ATDC .... 29*
Very nice with;
* 3.55 Gears
* Good Exhaust System
* A 'bit' of Compression
The only accurate way to measure lift is to v block it. You cannot measure lift with a dial caliper from the nose to the base. Because grinders can put the lobe literally anywhere on the core they want, there is no way of knowing where the lobe is in relation to the camshaft core center line, so v blocking is the only way.
Harvey Crane, was/is a genius. These cams, really do work....
Why are you the only guy,(besides myself, taught in the 80's..) that remembers this basic stuff?...
A-Body-Bomber,
A 'steel-trap' mind, or I'm stuck in the late-60's and 1970's.
I think its time to get rid of my Bell-Bottom Pants, and all those Incense Sticks.
And that 'Beach Boys' 8-Track Tape ..... 'Endless Summer'.
Oh wait, not yet.......... here comes 'Sloop John B'.
:coffee2: Morning Coffee
Crapped if I know. It's common knowledge......or so I thought.
Rusty,
Excellent 'Forehand Smash' right down the base-line.
Krazy Kuda never saw it coming.
Rusty Rat Rod '15' ......... Krazy Kuda 'Love'
I know the v-blocks or actually degreeing it is the best way, but for a quick ball park, I've been able to come close with calipers...
I was trying to offer a quick easy check for the layman, not everyone has v-blocks or is willing to degree their cam to find out what it is...
The lift at the lobe is the difference between the base circle and the lift at the nose. Since the camshaft spins at half the speed of the crank, the duration of the lobe is never over 360 crank degrees, which can means that the base circle should be able to be measured perpendicular to the peak of the nose of the lobe since the lift should be done in less than 180° of camshaft rotation. I have a few stock 360 cams that I've been able to measure this way and come within less than .005" of what the advertised spec for lift is.
PM me your paypal address, I will transfer a quarter so you can buy a personality... :glasses7:
What are you ?
Orland Park's top Comedian.
Two Shows Nightly > 8:00 PM and 11:00 PM
Tickets Available at the Box Office.
I'm here all week... :glasses7:
Be sure to tip your bartenders and waitresses...
If you want to start, I can dish it out as well as I can take it... #-o
I'm here all week... :glasses7:
Be sure to tip your bartenders and waitresses...
If you want to start, I can dish it out as well as I can take it... #-o
Stick around.....Karl has a million of em" LOL
Come on you two. Do we have to see this on every thread now?
To the OP, you MIGHT try an old Cam Dynamics catalog if you can find one. Crane made that line too and it could be one of those old numbers. Cam Dynamics also used the same prefix or suffix such as "HMV" as well, although it was only stamped on the cam and not advertised on the part number in the catalog.
To the OP, you MIGHT try an old Cam Dynamics catalog if you can find one. Crane made that line too and it could be one of those old numbers. Cam Dynamics also used the same prefix or suffix such as "HMV" as well, although it was only stamped on the cam and not advertised on the part number in the catalog.
I know Karl......I wasn't trying to slam disagree with you. I didn't mean it like that. Sorry if that's how it came across. Sometimes "in the ballpark" has a pretty big differentiation. LOL
sleepyhead416
Well-Known Member
Got it guy's 480 lift. Thanks for help It's already in waiting on NEW lifters from Summit
I didn't take it as you slamming me.
ale:We both know each other's knowledge and capabilities.
rayer:I was just trying to "keep it simple" on my reply... #-o
"Someone else" was trying to start something and twist it into something that it wasn't. He's not going to drive us apart... :finga:
I was asking what vintage it was in my first post, so I could know if it would be in my book. According to my old 1998 Crane catalog:
The Powermax camshafts replaced the HMV grinds.
If he has .480" lift, it's either the HMV-272-2 or the HMV-278-2.
Here's the pictures of both pages that they are listed on in the books for your reference. If you can't read them in the post, copy them to your hard drive and zoom in on them with picture software:
View attachment Crane A01 B.jpg
View attachment Crane A02 B.jpg
The Powermax camshafts replaced the HMV grinds.
If he has .480" lift, it's either the HMV-272-2 or the HMV-278-2.
Here's the pictures of both pages that they are listed on in the books for your reference. If you can't read them in the post, copy them to your hard drive and zoom in on them with picture software:
View attachment Crane A01 B.jpg
View attachment Crane A02 B.jpg
For anyone interested, here is a chart that I made back in 2005-2006 of all of the Mopar SB cams that were available at that time... I collected data on the most popular manufacturers from their catalogs and online postings and went through all of the information forward and backward... In the process I found some of the information was incorrect, like one spec would not match the rest of the data, so I did calculations forward and backward to find the true specs for the cams and corrected them in this final chart... The spreadsheet goes from columns A to columns BV for the whole spreadsheet, but I collapsed it to make a chart to give all of the corrected information on the different cams...
In this part, you can see the 107.5 for the lobe center on the Crane 272 H10 which I found was the corrected spec and not what Crane listed... This best fits the numbers for lobe center, lobe centerline, and valve open/close...
This chart is the best match for open/close, overlap, lobe separation, and lobe centers.. Not all manufacturers list all of this information, but it can be calculated from the specs that they give in most cases... I do have data from other manufacturers at that time also...Let me know if you are interested in it... But here's the Crane info for now, since this thread was originally about Crane...
In this part, you can see the 107.5 for the lobe center on the Crane 272 H10 which I found was the corrected spec and not what Crane listed... This best fits the numbers for lobe center, lobe centerline, and valve open/close...
This chart is the best match for open/close, overlap, lobe separation, and lobe centers.. Not all manufacturers list all of this information, but it can be calculated from the specs that they give in most cases... I do have data from other manufacturers at that time also...Let me know if you are interested in it... But here's the Crane info for now, since this thread was originally about Crane...
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