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Old 10-13-2003, 10:32 AM
GearHead69's Avatar
'70 Chevelle '70 C10
 
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Valves

I'm building a 355 roller motor with 492 double humps, ported, flowed, 2.02/1.60's pocketed to 1.550. Anyway when I was building these heads my origional plan was to run a mechanical flat tappet cam and I bought all the stuff to do it (600 lift spring, retainer kit, Elgin street flo valves) I got talking to drag racers and they all suggested going roller everyting and swapping my old cam, springs, lifters for roller stuff. I did all of that.. cut out my pockets to put a set of Canfield 1.550 roller springs, got a roller cam and lifters. Only thing I didn't do was get different valves, will the street flo valves work with my roller set up or will it be to harsh. I really don't want to spend big bucks on severe duty valves.

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Old 10-13-2003, 04:10 PM
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It doesn't matter what type of valves you use with a roller cam. It does matter what kind of distributor gear you use. You also don't want your cam walking forward, so use a cam button.

The reason you need roller valvesprings is because of the faster opening and closing rates of a roller profile. I have used non roller springs with a roller cam and it worked great for about 2 weeks untill a spring finally broke in two.
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Old 10-13-2003, 04:47 PM
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I'm not really talking about what valves to use with roller cam.. I mean what valves to use with Roller Springs. I bought the Elgin valves for my regular 600 lift springs and they matched the spring rates great, but now that I have roller springs I think the valves I bought are not going to be strong enough to match with the roller springs because they have high seat pressure #'s.
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Old 10-13-2003, 04:51 PM
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Call the tech line at Elgin just in case but I think you will be fine.
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