stingray_76

Dur. 272°/284° , Dur. @ .050” 216°/228°. Lift: .454”/.480”
what can i expect to get out of this cam (hp/torque) and how do i get it :confused:
The car is a 1976 L-48 completly stock other than the Crane Cam described above. :)

thanx in advance for your help

Rob

PatG

To step up to a cam like that you are going to want to do some head work and dual exhaust as well. Just guessing I would say with good heads and dual exhaust you should be able to get 325-375 crank HP out of a cam like that. I dont think that stock L48 head springs are good for that cam profile, you will want to check with the cam manufacturer.

tnt76vette

Better head springs needed for sure, along with better heads, a good dual plane intake for the street, headers, and true duals exhausts. What is your transmission and rear gears BTW? You might be unhappy with that much cam with a 3.08 rear end and an automatic. You would probably need a higher stall convertor too if you have an automatic. My $.02


[Modified by tnt76vette, 12:12 AM 7/15/2003]

boredsoIstrokedit

That cam is not much more than the L-82 cam. Headers FOR SURE with it, then an intake, then carb, then new heads if they are in the budget, then a new cam with the new heads. If the rest of the motor is pretty much stock, cam + headers w/exhaust should give you quite a bump in SOTP. Maybe 30-40 HP provided timing and carb are tuned for it. You will probably want 9.0-9.5 compression ideally. :cheers: Check with the cam manufacturer, but I would bet Z-28 springs would be a perfect match for that cam. I don't know what springs came with that engine, but I do know of several SBC running the edelbrock cam (junk IMHO) with .488" lift and stock smog springs.


[Modified by boredsoIstrokedit, 11:40 PM 7/14/2003]

stingray_76

the car has 3.08 gears and the stock auto trany
what gears would you suggest???
what stall torque convertor??
should i get a slap shifter???
performer intake???
tune rochester or get a demon or something??? what cfm???
:confused:

redwingvette

Corvette Fever did an article back in 96 where they used that cam, did some head work (larger valves, ported) and ended up with 326hp.

vettfixr

The cam you're describing is a Crane HMV 272 Max Velocity cam also called Powermax. I have it on my 74 and I think it's great. My engine has a stock bottom end including stock pistons and rods. I swapped the heads for World Products SR Torquers with 2.02 x 1.60 stainless valves in a 67 cc combustion chamber size and used 1.5 Summit full roller rockers. I'm running an Edelbrock Performer manifold (knockoff) with an Edelbrock Thunder series 650 cfm carb. The car has Dynomax ceramacoat headers going into 2 1/2 inch stainless exhaust pipes and out through dynomax Ultraflow mufflers. I asked someone to run a desktop dyno for me and the results are in my sig. I've never raced the car so I can't give you et's. What I can tell you is the cam will idle down to 750 rpm with a nice lope and has a fairly good bottom end for it's size. Once it hits 2000 rpm it starts to breath and pulls strong past 5K. I would highly recommend this cam to anyone with a mildly warmed up small block.

PS
I forgot to mention it gets 15 inches of vacuum at idle so it plays nice with all the accessories in the car.


[Modified by vettfixr, 9:13 AM 7/15/2003]

The Money Pit

That's not much bigger than Edelbrocks Performer cam.Good for just over 300hp/380 lbs.Nice low end though. :yesnod:

flynhi

I ran this cam for several years in my 355. I can't recall the numbers but with headers and a home port match and bowl cleanup, it performed very well for general use.

Tominator

I would run 1.6 rockers with that ti get the lift a little higher.

boredsoIstrokedit

1.6 rockers are a quick fix for an undersized cam. You are much better off buying the right cam the first time. I am not talking about cams designed for 1.6 rockers, just ones that crane engineered for 1.5 Full roller rockers are good, 1.6 IMHO, should not be used as much as they are. :cheers:

GrandSportC3

low 300's...

joe73vette

I did a lot of research and picked that cam for my upcoming rebuild this winter. It appears to be a good cam, better than the similar Comp XE 262 or XE262 4x4 cams. However, I am starting to have second thoughts and might go back to the Crane Powermax 266 for a little more low end with my 3.08's and future OD tranny. I;ll have to call them and ask for their recommendation. Joe


[Modified by joe73vette, 10:11 AM 7/15/2003]

Glensgages

stingray_76, maybe I can offer some 'ideas' of the performance you can expect. In '81, we put a similiar cam (.450"/.450", 288*, 224* @ .050") into my '79 Z28's stock short-block (block/crank/rods/pistons). We added 'well-used' 1.94"/1.50" heads w/ smaller (64cc) chambers, an old 327"/365HP Vette intake, a 650 dbl-pump Holley, 'on-sale' (Hedman?) headers, and a B&M shift-kit. With approx 9:1 cr, it ran on most anything (I prefer SUNOCO94). The stock torque converter, rear-end (a non-posi w/ 3.42:1 gears), and tires (GR70x15 UNIROYALS) remained on the car. It ran 16.40s before; after the mods, it ran 14.40s @ 97+ MPH thru open headers. It was a GREAT street set-up!!! :thumbs: :chevy

stingray_76

ttt :D

SuperFast80

I ran that cam with worked heads and lrger valves, headers, Performer, flat-tops and true duals w/ 3.08s and I found (1) it was a DOG under 2800 and (2) a MONSTER after it. I ran a best of 14.1/97 with it.