BBC Valves 11/32 Stem

brian schuetta · 10-29-2016, 10:28 AM

Anybody have a source for BBC valves 2.25 & 1.88 with 11/32"stems? I found some Ferrea types for $40 each but looking for something cheaper. To be used in a bracket motor.

MAURICE BLENDHEIM · 10-29-2016, 10:52 AM

Try Competition Products. MB

Tom Goldman · 10-29-2016, 01:54 PM

Manley Severe Duty valves are available everywhere for under $30 each .
Cheap valves are just cheap to buy , when the head comes off one of the intakes and takes out your piston ,head and maybe the whole engine ,they aren't cheap anymore.
And yes ,I have personally been taught this lesson , more than once .
Don't take this as a knock, but most Bracket racers tend to believe lower spring pressures make the engine live longer , but nothing could be further from the truth .
Higher spring pressures help keep the valve from bouncing when closing , this especially true with a BBC intake valve.
Valve bounce causes most failures .

brian schuetta · 10-29-2016, 09:07 PM

I understand that. I m trying to take weight out of the valve train and the heads have 11/32 guides already. I wanted a valve that is narrowed behind the head also. Are tool steel retainers a good move?

Tim H · 10-29-2016, 09:11 PM

Yes, as to the tool steel retainers. Also just to add many Edelbrock BBC heads are equipped with 11/32 stem valves ... just sayin ... And I think I have a set of Dart Pro 1 heads that came with 11/32 as I recall

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.

10-29-2016, 10:28 AM	#1
brian schuetta Member Join Date: Apr 2005 Location: san antonio tx Posts: 259 Likes: 5 Liked 28 Times in 15 Posts	BBC Valves 11/32 Stem Anybody have a source for BBC valves 2.25 & 1.88 with 11/32"stems? I found some Ferrea types for $40 each but looking for something cheaper. To be used in a bracket motor.

10-29-2016, 10:52 AM	#2
MAURICE BLENDHEIM Senior Member Join Date: Jun 2011 Location: Langley (no igloos), British Columbia, Canada Posts: 566 Likes: 305 Liked 264 Times in 85 Posts	Re: BBC Valves 11/32 Stem Try Competition Products. MB

10-29-2016, 01:54 PM	#3
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,473 Likes: 878 Liked 855 Times in 234 Posts	Re: BBC Valves 11/32 Stem Manley Severe Duty valves are available everywhere for under $30 each . Cheap valves are just cheap to buy , when the head comes off one of the intakes and takes out your piston ,head and maybe the whole engine ,they aren't cheap anymore. And yes ,I have personally been taught this lesson , more than once . Don't take this as a knock, but most Bracket racers tend to believe lower spring pressures make the engine live longer , but nothing could be further from the truth . Higher spring pressures help keep the valve from bouncing when closing , this especially true with a BBC intake valve. Valve bounce causes most failures . __________________ Tom Goldman 1500 SG , 1506 STK

10-29-2016, 09:07 PM	#4
brian schuetta Member Join Date: Apr 2005 Location: san antonio tx Posts: 259 Likes: 5 Liked 28 Times in 15 Posts	Re: BBC Valves 11/32 Stem I understand that. I m trying to take weight out of the valve train and the heads have 11/32 guides already. I wanted a valve that is narrowed behind the head also. Are tool steel retainers a good move?

10-29-2016, 09:11 PM	#5
Tim H VIP Member Join Date: Jan 2007 Posts: 1,039 Likes: 1,062 Liked 481 Times in 158 Posts	Re: BBC Valves 11/32 Stem Yes, as to the tool steel retainers. Also just to add many Edelbrock BBC heads are equipped with 11/32 stem valves ... just sayin ... And I think I have a set of Dart Pro 1 heads that came with 11/32 as I recall

10-30-2016, 05:55 AM	#6
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.