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1320racer · 10-30-2016, 05:55 AM

Brian, FYI...

I ran Manley Severe Duty 11/32" stem valves, 2.25/1.88 in my cast iron oval port heads atop my roller cammed 700+HP 468 BBC bracket engine for many years and thousands of passes turning 7400rpm in the lights. Those valves were actuated with Manley polished Nextek springs # 221443P 235 closed/610 open. Never broke a valve, valve spring, rocker arm, rocker stud, etc.

Further, the valves in my Brodix 3 xtra heads atop my 522 are 11/\32" stem as are the valves in my Brodix HH heads atop my 600" engine.

10-30-2016, 05:55 AM	#5
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 2,628 Likes: 160 Liked 759 Times in 379 Posts	Re: BBC Valves 11/32 Stem Brian, FYI... I ran Manley Severe Duty 11/32" stem valves, 2.25/1.88 in my cast iron oval port heads atop my roller cammed 700+HP 468 BBC bracket engine for many years and thousands of passes turning 7400rpm in the lights. Those valves were actuated with Manley polished Nextek springs # 221443P 235 closed/610 open. Never broke a valve, valve spring, rocker arm, rocker stud, etc. Further, the valves in my Brodix 3 xtra heads atop my 522 are 11/\32" stem as are the valves in my Brodix HH heads atop my 600" engine. Last edited by 1320racer; 10-30-2016 at 09:43 AM.