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Anybody know this cam?

September 1 2013 at 7:39 AM
M.Rad.  (Login MRad)
Member
from IP address 173.147.76.207

Hi Guys- I have a cam I bought years ago, but never ran. It's a Crane "Hydraulic Energizer" single pattern with .554 lift and 228*@.050 (284*@.004). The operating range is listed as 2800 to 5800, with 6500 valve-float redline.

Has anyone used this cam, or know how it works? It's slated for a 70 Torino of about 4,000lbs with a C6 and 3.70.

As always, any help is appreciated!


Regards,
M.R.

 
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joe
(Login methylated)
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184.5.234.211

It's small enough to work well for those gears and a slushbox

September 1 2013, 11:28 AM 

I hope the LSA is 108-112 (higher numbers being preferred for the slushbox). Even though it is a small cam you still may only have 8-12 inches vacuum at idle ,that's not a big deal though.

I ran a juice cam very much like that one except it had lobes with a little more minor intensity (275 @ .006 225 @ .050) on a 108 LSA When you dropped the clutch in 1st gear it would JERK ! forward about 1 foot max then stop dead and blow the tires off .

A 108 along those lines will have a nice "pop" in the mids a 112 will be smoother throughout .

this was all in a 72 torino which weighs more than your car , but a 72 allows header tubes with more generous radiuses in the bends which has to be worth some HP .

I ran a variety of gears but the highest was 3.89 with a wide ratio toploader 2.78 1st .

on true street radials(275 goodyear eagle st) mine would not launch much higher than 3000 without wasting the tires . It has a traction lock , if you go drag racing with a traction lock add one extra steel .

YOU WANTED THE BEST ?
WELL THEY DIDN'T MAKE IT !
SO HERE'S WHAT YOU GET !

 
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M.Rad.
(Login MRad)
Member
70.195.193.203

Re: It's small enough to work well for those gears and a slushbox

September 1 2013, 5:25 PM 

Thanks Joe, that sounds encouraging. With a heavy car like the Torino I need the low end power.
I'm kinda confused about the LSA though-(geometry was never my strong suit).

The card lists:

I/O-31*BTDC (7*BTDC@.050) I/C-73*ABDC (41*ABDC@.050)
E/O-75*BBDC (51*BBDC@.050) E/C-29*ATDC (3*BTDC@.050)


Max lift Intake @ 107*ATDC
Max lift Exhaust @ 136*BTDC

But it doesn't give the LSA seperately. Is that calculated from the max lift numbers or from the lift at .050, or from lift at .004"?

If I calculate from the max lift it looks like I have 136* LSA-but that doesn't sound anywhere near correct!
Overlap looks like about 60*, which sounds more reasonable, but I'm not really sure about that either...
HELP!!

Regards,
M.R.




Regards,
M.R.


 
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George Pence
(Login gpence)
A1
108.218.153.39

Crane #133052

September 1 2013, 6:15 PM 

The timing figures based on maximum lift indicate this camshaft is utilizing asymmetric lobes. The LSA is 112°, which in a street motor with big valve 4V heads shall perform similarly to a camshaft with 108° LSA in an in-line valve motor. That's the Crane 284 H12 grind, part number 133052. This is not a bad cam, in fact its quite a hot performer.

60° of overlap is OK, its about the max I recommend if low rpm performance is a concern. Overlap based on the 0.050" duration figures is about 4° (hydraulic intensity is 56°), this is further indication you wouldn't want more overlap with these lobes in a street engine.

The intake valve is closing at 41° ABDC (measured at 0.050") which is one degree more than some engine guys recommend for a street Cleveland in order to avoid reversion, not the end of the world. The relatively late closing of the intake valve will also take a bite out of the motor's dynamic compression. The exhaust valve is opening at 75° BBDC, which is a little late for my preferences. So to avoid reversion, raise dynamic compression, and to open the exhaust valve sooner I'd run this cam about 4° advanced.

Four degrees advanced would look like this:

284°/284° advertised duration
112° lobe separation angle
Int lobe mathematic centerline = 107° ATDC
Ex lobe mathematic centerline = 117° BTDC
----------------------------------------------
Exhaust valve opening = 79° BBDC
Intake valve opening = 35° BTDC
60° overlap
Exhaust valve closing = 25° ATDC
Intake valve closing = 69° ABDC

Notice my lobe centers are based on the mathematical centerline of the lobes, not the point of highest lift. The overlap event is not centered around TDC, but that's something we gotta live with when we select a single pattern cam.

-G
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This message has been edited by gpence from IP address 108.218.153.39 on Sep 1, 2013 6:17 PM


 
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joe
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the 4 degrees may be ground in it

September 1 2013, 6:21 PM 

need a degree wheel and dial indicator to know for sure.

YOU WANTED THE BEST ?
WELL THEY DIDN'T MAKE IT !
SO HERE'S WHAT YOU GET !

 
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M.Rad.
(Login MRad)
Member
70.195.199.130

Re: the 4 degrees may be ground in it

September 1 2013, 8:30 PM 

Uh, thanks guys... I guess I'll have to do some more reading to figure out what that all means.

But, hey! at least you and George didn't tell me I screwed up royally!

Serriously, thanks for the response guys, I appreciate your input, I know it's based on many years of hard won experience.

Regards,
M.R.

 
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joe
(Login methylated)
Moderators
184.5.234.211

that cam is real close to the baseline we recomend around here

September 2 2013, 9:30 AM 

I like an LSA a little tighter than George even on a streeter
but anyway .

like I said I had a cam with 225 @ .050 and 275 @ .006 .550 lift 108LSA . With a holley strip dominator and dorton 830 annular carb it would pull out in fourth with very little clutch slippage and it would still get very angry from 3000 to 6000+ .

Thats the beauty of a four barrel cleveland !

YOU WANTED THE BEST ?
WELL THEY DIDN'T MAKE IT !
SO HERE'S WHAT YOU GET !

 
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tinman
(Login tinman351)
Member
108.83.220.115

Crane 284H12

September 2 2013, 12:33 PM 

it's ~at least~ 'a step over stock' as they say

http://www.cranecams.com/230-233.pdf

it's Crane's version of a 284H, very similar to my Crower 284H which George came up with the same summary

see if you can get it dialed in to about 107* / 108* intake centerline like George suggests & see how she rips!



there'll be phantoms, there'll be fires on the road... and the white man dancing


    
This message has been edited by tinman351 from IP address 108.83.220.115 on Sep 2, 2013 12:38 PM


 
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