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I’m installing a Comp Cam CL34-227-4 High Energy with hydraulic flat tappet lifters. Summit specs say that aftermarket valve springs are required for optimal performance, but many people I know as well as some reviews say that the stock springs worked for them. I’m wondering whether or not I actually need to get the new springs or not, and if I do, will I need to buy spring retainers as well.
It’s a 1991 F250 460 4 speed automatic w/ OD. Stock heads and intake and bore specs. Any help is appreciated.
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Single pattern cam is inappropriate for a BBF.

Not a good choice if running factory EFI.

Use new springs with the cam. OEM springs are too light and likely worn out if original.







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Well yes sales are a given. As a manufacurer I would not make what people don't want which leaves consumer ignorance as the driving force behind the sales. Sorry about the tangent from the original post.
 
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