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> Valvetrain lightening, For higher revs....
alpha434
post Mar 11 2006, 04:19 PM
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Here's a picture of a rocker that we did for a 356.

And BTW. Our 356's rev 8000.


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Brett W
post Mar 12 2006, 10:26 PM
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The gains found in lightening the rocker arms ar most very minimal. As TimT said. MOI is very small. The biggest change you can make to the valve train is in the valve and lifter pushrod side.

You can take the stock rockers and fit them with needle bearings for a decent upgrade. You really won't see much in the way of HP improvement, but the "rev-ability" of the engine will improve as will heat going into the oil.

One thing that many people over look is camshaft design. That is one area where our engines are at a major disadvantange. When we start "lofting" the valves over the nose of the cam we really haven't gotten into anything exciting.
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Posts in this topic
alpha434   Valvetrain lightening   Mar 11 2006, 04:19 PM
Aaron Cox   vey cool! (get a digital camera ...   Mar 11 2006, 04:57 PM
alpha434   We've got a stockpile of them. We are not wor...   Mar 11 2006, 05:06 PM
McMark   Palm doesn't make digital cameras. Palm makes...   Mar 11 2006, 05:19 PM
Jake Raby   I lighten mine without drilling any holes... All d...   Mar 11 2006, 06:02 PM
Cap'n Krusty   ...   Mar 11 2006, 06:12 PM
MattR   Last time I pulled off my valve covers on my 912 f...   Mar 11 2006, 06:13 PM
Gint   Who the hell is "we"? And "our"? Pretty sure you...   Mar 11 2006, 08:22 PM
Aaron Cox     Mar 11 2006, 08:23 PM
alpha434     Mar 12 2006, 02:20 AM
kwales   Alpha, Jake, Ever considered using wire EDM or ra...   Mar 12 2006, 10:53 AM
kwales   Need a really good house? Here are the guys I usta...   Mar 12 2006, 11:11 AM
alpha434   Yeah. I've got access to EDM equipment. And I...   Mar 12 2006, 12:01 PM
Racer Chris   Type IV rockers are forged and the outer surface i...   Mar 12 2006, 12:58 PM
alpha434     Mar 12 2006, 09:44 PM
alpha434     Mar 12 2006, 09:47 PM
TimT  
  Mar 12 2006, 10:07 PM
Brett W   The gains found in lightening the rocker arms ar m...   Mar 12 2006, 10:26 PM
Jake Raby   Wait till you see the heads that we just finished ...   Mar 12 2006, 10:40 PM
alpha434   NHRA top fuel drag cars use aluminum rockers. Hi...   Mar 12 2006, 11:59 PM
Brett W  
  Mar 13 2006, 08:31 AM
Mueller   ...   Mar 13 2006, 09:05 AM


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