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ddgonzal
Re: Modded A15 problem
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Quote:
single spring good enough or i must use the double 1???

Quote:
Then engine cant rev past 6k rpm


A15 valve springs are only good for a little over 6000 RPM. For higher RPM, Nissan Competition sold dual springs. The lighter A12 valves could go about 6400 with single springs. But the A15 has larger valves. And if yours are worn from age and use, they might not even rev to spec.

Quote:

Any other engine's single valve spring(heavier) tat i can use??
Yes, but your cam will wear out faster. Some use Austin Mini competition springs on the Nissan A Engine.

Dual valve springs are the best.

Posted on: 2009/9/1 19:16
Transfer the post to other applications Transfer

Subject Poster Date
     Modded A15 problem ronald_loulan 2009/8/31 6:34
       Re: Modded A15 problem Anonymous 2009/8/31 6:50
       Re: Modded A15 problem Rezlo 2009/8/31 6:58
         Re: Modded A15 problem ronald_loulan 2009/8/31 7:14
       Re: Modded A15 problem Rezlo 2009/8/31 7:42
         Re: Modded A15 problem ronald_loulan 2009/8/31 7:57
           Re: Modded A15 problem ROConnor 2009/8/31 8:16
             Re: Modded A15 problem ronald_loulan 2009/8/31 11:47
               Re: Modded A15 problem ddgonzal 2009/9/1 19:16
                 Re: Modded A15 problem ronald_loulan 2009/9/2 8:48
       Re: Modded A15 problem superbin 2009/8/31 20:37
       Re: Modded A15 problem LittleFireyOne 2009/9/1 14:06
         Re: Modded A15 problem ROConnor 2009/9/1 14:18
       Re: Modded A15 problem ronald_loulan 2009/9/1 15:04
       Re: Modded A15 problem ronald_loulan 2009/9/4 4:20




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