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Cam for 418

 
Old 03-14-2019, 05:02 PM
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Default Cam for 418

Attention cam gurus. I have a 418 stroker that is being put togather. Undecided on heads. Have 823's and 243's currently leaning towards 823's cause I figure the cubes and a proper cam can make up for lack of low end from the 823's. Feel free to comment on that. 3.73 gears, would be racing @rpms between 1500-4500 most of the time but occasionally 3500-6800? So all in all needs to make power from 1500-6800, or some where in there. It will probably be a smaller cam. I know cam grinders/manufacturers have an "operating rpm" but they seem all over the place from similar grind-grind.

thanks for any reply
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Old 03-14-2019, 05:07 PM
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823s for sure with that many c.i.
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Old 03-14-2019, 05:12 PM
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Originally Posted by 64post View Post
823s for sure with that many c.i.
thanks, makes me feel better about leaning that way.
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Old 03-14-2019, 05:43 PM
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This is very interesting. What kind of racing? Gear? Converter? The rest of the package and goals for drivability off idle?
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Old 03-14-2019, 05:49 PM
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Originally Posted by Summitracing View Post
This is very interesting. What kind of racing? Gear? Converter? The rest of the package and goals for drivability off idle?
this particular car is 3100 w/o driver. Second gen camaro 3.73 gen. 6 speed. Car is 90%track 10%street. Dont really care about peak power. Tire height and gearing suggest the the rpms I listed and will be in for the speeds I will need for autox and road race. Glad you chimed in Summit. I was looking at a Summit truck cam 8719

Last edited by Bearden4242; 03-15-2019 at 07:41 AM.
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Old 03-15-2019, 08:28 AM
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The 8719 would certainly do the job, but our Stage 3 truck 222//231 112 + 5 .550/.550 would be an absolute bruiser. We close the intake valve at 38 degrees, so it's going to make a lot of power in the low and midrange. We rate it at 2200-6500 with a 5.7 and your cubes are going to use up that air earlier. The seat timing is pretty tight so it behaves like a 218 cam but makes more power everywhere.
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Old 03-15-2019, 09:53 AM
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Originally Posted by Summitracing View Post
The 8719 would certainly do the job, but our Stage 3 truck 222//231 112 + 5 .550/.550 would be an absolute bruiser. We close the intake valve at 38 degrees, so it's going to make a lot of power in the low and midrange. We rate it at 2200-6500 with a 5.7 and your cubes are going to use up that air earlier. The seat timing is pretty tight so it behaves like a 218 cam but makes more power everywhere.
Thanks for the reply and suggestion. Makes sense that more cubes will shift the start of the operating range. Will definitely look at the stage 3
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Old 03-15-2019, 11:09 AM
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Pay the fee that PAT.G charges ( roughly $50-$100) and get it custom. Pat G has stellar results with cam ing rect. port setups. Cam Motion can do a custom spec'd for free too. Either way, Cam Motion would be the cam supplier hands down.
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Old 03-15-2019, 12:07 PM
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Originally Posted by Jimbo1367 View Post
Pay the fee that PAT.G charges ( roughly $50-$100) and get it custom. Pat G has stellar results with cam ing rect. port setups. Cam Motion can do a custom spec'd for free too. Either way, Cam Motion would be the cam supplier hands down.
All my options are open. Trying to understand how and why a cam operates in certain areas better than the next cam. I like to know how clocks work not just tell time. I understand duration lsa and advancement determine valve events. Which determines overlap. I take it PAT. G uses cam motion for grind?
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Old 03-15-2019, 02:06 PM
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Originally Posted by Summitracing View Post
The 8719 would certainly do the job, but our Stage 3 truck 222//231 112 + 5 .550/.550 would be an absolute bruiser. We close the intake valve at 38 degrees, so it's going to make a lot of power in the low and midrange. We rate it at 2200-6500 with a 5.7 and your cubes are going to use up that air earlier. The seat timing is pretty tight so it behaves like a 218 cam but makes more power everywhere.
Reminds me a lot of a Crane SBC grind that was real popular with the Impala SS crowd back in the 90's and early 2000's. Crane cams never won the peak hp wars but were torque monsters, which helped our heavy cars. I knew lots of guys running stock LT1 heads with a similar cam that were running mid to low 13's at around 106 to 108 mph. That was on the old gen 2 vortec heads, in a 4500 lb car (including driver).
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