New Springs for Vortecs - Team Camaro Tech
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post #1 of 5 (permalink) Old Sep 3rd, 03, 02:44 AM Thread Starter
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Did anyone happen to see the October '03 article in Car Craft (p.48-49) about the new Comp Cam spings that are designed for vortec heads ? They're designed to fit the vortec valve guides so that you don't need to have them machined. They are supposed to allow you to run a cam with up to .550 lift just by changing the springs. They are a bit pricey ($ 275.00 for springs, retainers, & keepers).

Does anyone know how big of a cam (lift) that you could use with a stock '96 truck vortec 350 and not have to worry about checking piston to valve clearance ? Thanks, Ron.
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post #2 of 5 (permalink) Old Sep 3rd, 03, 04:11 AM
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Yes, they do look like a good investment. Anytime I can reduce reciplicating weight and spring harmonics, I'll go for it. The beehive shape spring seems to put a dampener on the harmonics. One is paying for the "technology" of the product.

I believe the max valve lift a stock head could take would be .450" on the Vortecs. I don't know for sure. Maybe others would chime in......

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post #3 of 5 (permalink) Old Sep 3rd, 03, 06:18 AM Thread Starter
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Thanks for the reply Everett. I didn't really ask my question correctly; what I meant was if I changed to the new springs (which are advertised to support .550 lift with no machining of the guide), how much cam lift could I have without having to worry about checking the piston to valve clearance. The pistons are stock '96 vortec. I've had the oil pan off; the piston skirts looked kind of thick, like they are maybe hypereutectic ?
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post #4 of 5 (permalink) Old Sep 3rd, 03, 08:02 AM
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Crane also makes springs for this application they are listed for iron head lt1 engines and can support up to .525 lift they are around 150 bucks. I can't remember all the details but they are listed in jegs and summit.
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post #5 of 5 (permalink) Old Sep 3rd, 03, 08:57 AM
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I've got some EPN springs, 110lbs at the seat, and they support .550 lift. I checked, they actually do. They are installed at 1.800".

Oh yeah, they're under $50. Comp is raising the price 'cause they know everybody wants a new set drop-in springs for Vortecs!

Matt Jones
Lead Mechanical Engineer
Art Morrison Ent. Inc.
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