comments and suggestions solicited and welcome re: camshaft

jerry S

New Member
Sep 3, 2003
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52.22N 5.12E
I had corresponded earlier with 302 coupe and he was very kind to share his insight with me in this regard. I would like to survey as much of the SN population and get input in addition to his valuable opinions.

My heads are going in for porting and these are the post flow numbers:

Intake/Exhaust .100" 79/61
Intake/Exhaust .200" 145/121
Intake/Exhaust .300" 198/168
Intake/Exhaust .400" 241/178
Intake/Exhaust .500" 279/196
Intake/Exhaust .600" 284/205

I have 3.70s in the back and a 3000 stall. Forged flat top pistons with 11:1 CR, forged rods, stock crank.

After hemming and hawing, I have decided to throw common sense into the wind and do the hydraulic roller cam conversion after all. I don't want to make my peak power too much in excess of 6k. I am thinking that this would be a good cam to go with it:

Comp Cams part number 35-426-8, grind no. XR288RF-HR (Hydraulic roller)

Adv Dur:
Intake: 288
Exh: 294

Dur at .050
Intake: 236
Exh: 240

valve lift with 1.6 rocker
Intake: 555
Exh: 576

Do you you SN gurus concur?
 
rbohm said:
i would like to see a slightly smaller cam, but that is a good choice.

I would be interested in hearing your reasons behind your suggestion. If you would be so kind as to share, I would appreciate your insight.

This is my current flat tappet hydraulic cam and I can live with its power band.

- ADV DUR: INT 297, EXH 308
- LIFT: INT 538, EXH 534
- DURATION AT .50 DEGREES: INT 236, EXH 242
 
tylerrocks said:
I forget, do you have as 302? That is a very hefty cam if so. You would see peak much higher than 6K. More displacment would be a diffrent story.

I have a 351W bored .040 over, which gives me a 358 or 359, I don't remember. I like the idea of that cam analyzer software that was referenced the link posted by brianj5600.