One of my nephews just got this solid roller cam. Crane part # 118131, advertised duration of 282 intake 290 exhaust, duration at .050 is 242 intake and 250 exhaust, lift is 580 intake and 600 exhaust, lobe seperation is 106. Going in a 1970 chevelle with a 355, DART 200 cc PRO-1's, TH-350, 4.11 gears, 10 inch 3500 stall, 10.5 compression. I told him it will not idle well, he does not care. I think once he hits 3000 3500 rpm it should be a bear, but he is young does not care much about street manners, but will drive it on the street. What do you guys think? Thanks.

Somebody better versed in cams should probably toss in their .02 here, but if the 10.5:1 CR is static, isn't a cam this big going to take his dynamic CR way down? I would have thought he'd need more static CR. And no, I don't think I would want to run this as primarily a street car, but that's just me. I am too old for the tickets, the hassles, and with two teenagers in the house, I am too poor to pay for the gas. ;)

If the CR is 10.5, the cam is too small. The DCR is about 8.47. This will reguire extra care in assembling the engine and running it to avoid detonation. A 288º cam is about the smallest that can be run on pump gas. This is using a 106 LSA and 102 ICL. The 282 cam on a 110 LSA and 106 ICL will work, DCR 8.21. If the 106 LSA cam is installed at 106 ICL, the DCR is 8.21 and will work. With this DCR, the engine should make gobs of low end torque. Regardless of how the cam is installed, the quench distance must be tight, .035"-.045" favoring the lower number.

I ran a Crane 250/260 @.050, .600/.625 gross lift w/ 1.5 rockers, 106 LSA, 102 ICL. This is was in my 10.31:1 - 383 SBC. It made gobs of TQ and HP peaked at 6500 RPM. This was with a set of AFR 220's (too big). With a 4000 stall converter and 4.56 gears it made enough grunt to push my 3600 lb '71 Chevelle to 1.60 - 60' times. Cranking compression was 185 psi. Worked fine on 93 octane pump gas with no detonation issues with up to 38 degrees of timing.

It idled well and pulled 11 in-Hg with a 900 RPM idle speed. It would idle down to 700 or so. It was not a daily driver, but still had decent street manners. It ran power brakes just fine.

I'd say go for it. I think that cam would be just about right for a strong running 355 SBC.