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Old 04-20-2008, 02:46 AM
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Choosing a cam

could anyone recommend a good cam and intake. I have a 400 SB chevy .30 over with standard dish pistons. 5 speed tranny and a 3:08 ring gear. Thanks

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Old 04-20-2008, 05:11 AM
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Something along the lines of a 268/454 lift Competition cams, sounds ok.
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Old 04-20-2008, 06:10 AM
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What cylinder heads? What type of cam are you interested in, a Hydraulic or Solid Flat Tappet, Hydraulic or Solid Roller. What do you want this motor to do and what will you use it for? If it's a grocery getter I'd say hydraulic flat 218*-240*/480-525 lift 110-114 air-gap type dual plane. If you want more rumpitty-rump and all of that I'd find a solid flat 'bout 240*/250* and 525*550 on a 106-110 maybe a dual but prolly should single plane. Of course, if your heads are up to task and fit the bill, you could go roller either way... maybe be more specific. JMO
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Old 04-20-2008, 07:47 AM
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all of the cam grinding companies have a "cam help hotline" on their web sites....(isky/crane/lunati/comp/howards/etc/etc)

contact 5 of them then analyze/question each for why they recommended whatever

my $.02
leave the cam and motor alone....
swap to lower gears for alot more fun at ALL rpms...not just at peak HP rpms with a cam change...

400ft/lbs x 3.08 gears=1232ft/lbs twisting the tires
400ft/lbs x 3.55 gears =1420ft/lbs twisting the tires=15% more acceleration force
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Old 04-20-2008, 09:34 AM
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cams can and will add more torque too... especially when swapping from a stock one...
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Old 04-21-2008, 12:56 PM
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im running a set of double hump 63CC heads, not sure about valve size. I would prefer running a hydraulic cam
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Old 04-21-2008, 01:26 PM
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Isky #201271 270 Megacam. Use Isky#205D valve springs.
Isky cam timing specs Degree in this cam on a 104 intake C/L.
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Old 04-21-2008, 01:42 PM
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what compression ratio?
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