TwinTurbo.NET: Nissan 300ZX forum - Stock valves strong enough for dual coil valve springs?
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Subject Stock valves strong enough for dual coil valve springs?
     
Posted by KongZTT GT28RS MD on June 04, 2013 at 5:23 AM
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Message I have been doing alot of research and it seems that our stock valves are fairly large and it isn't really worth going with larger valves except for certain types instances (race etc). The goal with my car is an aggressive street car

I however have read up about JWT HD valves springs seat pressure actually being a little too light for JWT 500 cams. Even though JWT springs are made for the cams. It has been found they are a little low on seat pressure.

Can the stock valves handle the pressures of dual coil valve springs and ti retainers? Thinking ferrea springs. I am thinking of going with dual coil for a little more rpm to play with and also for better reliability as in terms of eliminating the chances of valve float at my rpm limit and boost pressures on race gas +n20.

Thanks!

May go with ferrea stock sized valves but would rather save some money and go with stock.


Anyone have flow

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teambushido(San Diego, CA) 19:24:51 12/11/04

-1991 Stage _ TT 5spd (Upgraded to hell and back)
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-2000 Nissan Altima SE (Daily driver)
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-1997 Acura 2.2 CL, 5spd. Daily Driver.. (black ice victim
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