[batman09]

crane specs:

Part Number: 100052 Grind Number: 272 H10
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 GOOD IDLE, DAILY USAGE, OFF ROAD, HIGHWAY TOWING, FUEL EFFICIENCY PLUS PERFORMANCE, 2600-3000 CRUISE RPM, 8.75 TO 10.0 COMPRESSION RATIO ADVISED. (50 STATE LEGAL, PRE-COMPUTER, C.A.R.B. E.O. D-225-21) BASIC RPM 2000-5000
Engine Size Configuration
262-400 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 3027 @Valve 454 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3027 @Valve 454
Rocker Arm Ratio 1.5

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 27 BTDC 65 ABDC 272 °
Exhaust 67 BBDC 25 ATDC 272 °

Spring Requirements: Triple Dual Outer Inner
Part Number 99848
Loads Closed 105 LBS @ 1.700 or 1 45/64
Open 265 LBS @ 1.280
Recommended RPM range with matching components
Minimum RPM 2000
Maximum RPM 5000
Valve Float 6500

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 3 BTDC 33 ABDC 105 216 °
Exhaust 43 BBDC (7) BTDC 115 216 °

comp specs:

Grind 268H, 454 Lift, 268 Duration, Great For 305-350, Provides Low End Torque, Mid RangeGreat For Daily Driver, And Tow Vehicles, Good Throttle Response and Good Torque, with Slight Noticeable Idle1500-5500 RPM Range .




I know these are super close in specs.Is one better then the other?For a sbc with 1800 stall convertor.bm

 

[coldknock]

Not enough difference between the two to really notice once it's in the car and running. I'd say the Comp grind might be a little stouter off idle that the Crane. But just a little.

Larry

 

[killerformula]

a stall alone with your current setup would make twice the difference either of those cams would make without. If I were you, I'd put the 272 in it and a 2400 stall. Bet it will be at least a half second faster-

K

 

[Frisco]

Here is another to look at for comparison.

Comp #12-242-2
CS XE268H-10

1600-5500 RPM
Gross valve lift with 1.5 rockers .477 intake .480 exhaust
Duration at .006 tappet lift 268 intake 280 exhaust
Duration at .05 224 intake 230 exhaust
Lobe separation 110

Slight lope at idle.
Can use stock stall converter.

This is the one I referred to in my reply to your PM.

Excellent cam with stock or modified or aftermarket heads.

 

[bullheimer]

you kinda have to tell us what you want to do etc. before we can help you much, bro.
i just putta XE262 in my 350 and you would probably like it since you are on the milder side. if i had it to do over, i heard about my same engine with the comp XE268 and i liked it alot better the way it sounded. napa was giving it away. but then again my painter's car had an XE272 i believe and it sounded flat out nasty. i think both of your selections blow. too mild for me. any time you see the words "great for tow vehicle" that's pretty much what they're for. i think the specs of my XE262 are the very SMALLEST cam anybody should put into a car and still call it a hotrod. it's close to what you have selected. @216 and .454 as well, which is why i wish i went bigger. runs great tho. wifey's car (72 camaro SS)

ps, just read Frisco's post (still at Square D?) and so now you have Two votes for the comp xe268
change the stall and alittle headwork and thats two for the 272. (maybe even three)

 

[Frisco]

ps, just read Frisco's post (still at Square D?) and so now you have Two votes for the comp xe268
change the stall and alittle headwork and thats two for the 272. (maybe even three)

Hey Bull, yes I'm still here. I'm still waiting for my official "60 day notice" required by the Government for plant shutdowns. I expect to get that in January which is OK because then I'll be out in March and can really get with it on building the "new" coupe I bought in August. Most of the lines are now in Monterrey, Mexico and about 2/3 of the employees are gone. The rest of us will be here after the New Year, but will also be gone by June. A few salaried folks will be here for a short while after that.

As to the XE272; I seriously thought of using that came when I bought the crate 350 but opted for the 280H Magnum. It would have been a better choice for that engine since the compression wasn't up to what I was quoted by AFR. They thought I had flatop pistons. Since the truck was so light the 280H Magnum still worked well at the bottom end but could have used a little more stall than what I chose.