05-29-2020, 06:28 PM | #1 |
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Location: Jurupa Valley, Ca
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Cam Downgrade
Guess I'm officially old now. Getting tired of the cam in my new crate engine. It has great power but the idle is pretty bumpy due to a 108 LSA. thinking about going to mild cam with a 112 LSA or similar or even the stock L31 cam. Has anyone done this and did you really notice any loss in power during normal driving? I know I'll lose some top end power but what about the low end?
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
05-29-2020, 06:33 PM | #2 |
driving is in my blood
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Location: Mesa AZ
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Re: Cam Downgrade
Dude the stock L31 cam is pathetic. At least get an LT1 [gen2] cam.
Best option would be the smallest modern grind. I think comp has like 203/210 with a 110lsa.
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05-29-2020, 06:49 PM | #3 |
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Location: Eastern TN
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Re: Cam Downgrade
Go custom grind so you can get that 114 lobe separation and still have some duration. Look at the LS cams and you will follow what I am saying. The only concern will be DCR if the crate motor has alot of compression to begin with.
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05-29-2020, 08:18 PM | #4 |
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Re: Cam Downgrade
What's so pathetic about it? Have you ever run one? I have been running one for about 3 years now and it does everything I want out of a cam. I have around 300 hp and 375 pounds of torque and the power is in the low rpm range where you need it.
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05-29-2020, 08:48 PM | #5 |
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Re: Cam Downgrade
looks like the LT1 cam has a little too much lift. With Vortec heads max is about .480.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
05-29-2020, 08:53 PM | #6 |
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Re: Cam Downgrade
its a sp350/357 crate motor with 9.0 advertised compression ratio. the cam is 215/223 @ .050 with .473 lift and 107/109 lobe centers equaling 108 LSA. I had no idea when I bought the engine that it had a 108 LSA and that equated to a bumpy idle.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
05-29-2020, 10:24 PM | #7 |
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Location: Austin, TX, USA
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Re: Cam Downgrade
Marine cams or nitrous cams are great street cams for smooth idle and decent power. Looking through Comp's catalog there are a lot of options.
The XM262H has 218/224 @.050 and 112 lsa. And the XM256 is 212/218 @ .050 and 112 lsa to really smooth it out.
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05-29-2020, 11:46 PM | #8 |
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Re: Cam Downgrade
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