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Old 02-03-2011, 11:33 PM
mbaldwin mbaldwin is offline
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Cam opinions wanted.

Does anyone have experience with the Crane Cams Powermax hydraulic roller cams?
I am looking at this cam for my Chevy 383 build,
part number: 119701
Grind Number HR-222/345-2S-12.90 IG
Duration at 050 inch Lift
222 int./230 exh.
Advertised Duration
288 int./296 exh.
Valve Lift with Factory Rocker Arm Ratio
0.518 int./0.539 exh.
lsa 112
I am most likely going to be going with AFR 195cc heads, performer rpm air gap,750 cfm 4 bbl carb.
Engine is most likely going to go in an 81 Monte Carlo. the tranny needs rebuilt, so i can match the stall converter to what is needed.

here are the numbers fromDTD2k
RPM HP TQ
2000 189 495
2500 239 501
3000 289 507
3500 339 508
4000 381 501
4500 415 484
5000 435 457
5500 436 416
6000 418 365
6500 384 310
7000 343 257
7500 300 210

The engine will most likely not see the north side of 6000 rpm's.
Static comp ratio is 11.08 and dynamic comp ratio is 8.10
I have also been considering the 1 smaller cam in this line, the
Grind HR-216/339-2S-12.90 IG part #119671
RPM HP TQ
2000 192 504
2500 241 506
3000 291 509
3500 336 504
4000 375 493
4500 404 471
5000 417 437
5500 414 395
6000 385 337
6500 352 284
7000 306 229
7500 260 182
SCR = 10.95:1 DCR=8.16:1

had to drop SCR a little to get the DCR under 8.25:1
Not sure what my rear gear ratio is, probably what ever was stock in an 81 Monte.

your thoughts and opinions are welcome.

Thanks,
Michael
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