LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

which valve springs

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Old 06-25-2008, 09:15 PM
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which valve springs

CAM: 224/236 .605/.622 with 1.6 SA Pro Mag RR

I broke some piece of sh*t cm 612's. Im wanting to keep stock diameter so I dont have to pull the heads off.

Thanks,
Waylon
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Old 06-25-2008, 11:16 PM
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I went with the Comp Cams Beehive 26928-18. Good for up to .650 lift.
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Old 06-26-2008, 01:27 PM
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Get the PAC 1518's. They are good to .650 lift. Make sure you set them up with max pressure for those aggressive lobes, though.
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Old 06-26-2008, 05:48 PM
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The springs guys are telling you to use will get beat up in just a few thousand miles.
Tht lobe is irresponsibly aggressive for street use and you are going to need even more spring.
wrd1972 battles this recently and has a good thread in the archives from just a few months back, had it "resolved" for now at least but no long term results on the spring he settled on yet.
Do a search, find that thread, it will help.
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Old 06-26-2008, 07:08 PM
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Check your other post. I would say try the Crane 99893 springs and install them at 1.80" (150# closed). At 1.80" installed height the Cranes are good to .650". If they don't hold up then you should consider Manley NexTeks or another equivalent spring. If you still have trouble I'd switch to 1.5:1 rockers.
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