Re: Valve locks: 10 or 7 degree?
[Re: ragtop]
#582822
01/14/10 10:52 PM
01/14/10 10:52 PM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
What are the pros and cons of 10 dregree locks verses 7 degree locks. Thanks.
If you run high spring pressures you need the 10*,
the 7* can pull through.... I myself dont see any
down side to the 10*... JMO
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: MR_P_BODY]
#582824
01/14/10 11:26 PM
01/14/10 11:26 PM
|
Joined: Oct 2004
Posts: 1,752
detroit area
moderncylinder
top fuel
|
top fuel
Joined: Oct 2004
Posts: 1,752
detroit area
|
the down side to 10 degree is that it uses a greater percentage of the lock groove to hold the system in place,, there is "wedging" of the locks into the valve stem which assits in holding it all in place,, super 7, which is 8 degree wedges the lock into the stem more and puts less stress on the lock groove,,, most applications 10 degree is fine
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: Stanton]
#582826
01/14/10 11:55 PM
01/14/10 11:55 PM
|
Joined: Aug 2009
Posts: 2,054
Mooresburg, Tn
'72CudaRacer
top fuel
|
top fuel
Joined: Aug 2009
Posts: 2,054
Mooresburg, Tn
|
Quote:
So what would have been stock ... 7 or 10 ??
When I measured them (stock), they appear to be 7*
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: '72CudaRacer]
#582827
01/15/10 12:04 AM
01/15/10 12:04 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
Quote:
So what would have been stock ... 7 or 10 ??
When I measured them (stock), they appear to be 7*
Stock is 7*
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: dodgeboy11]
#582829
01/15/10 12:19 AM
01/15/10 12:19 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
Quote:
10 degree retainers are weaker than super 7's. If you cut through a 10* retainer you'll see there's less material in some critical areas than a 7 degree retainer. Does this affect most of our builds? Not very likely. Takes some pretty serious springs to need to worry about the strength of a 10* retainer.
I know that the engine guys I have dealt with said to
use 10* so I did based on their info... my springs
are a little over 900# at lift, I've had them out
a couple of times to check spring pressures and the
retainers and locks looked fine, they have been on
for about 5 years(4 years racing)
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: dodgeboy11]
#582831
01/15/10 12:40 AM
01/15/10 12:40 AM
|
Anonymous
Unregistered
|
Anonymous
Unregistered
|
don't confuse 7 degree locks and retainers with SUPER 7's, they're not the same. i won't run a standard 7 degree lock on anything. i've seen too many 7 degree locks pull through the retainers over time with only 330 lb springs.
i use super 7's occassionally. most stuff gets 10 degree, especially when running the "typical" roller spring pressures whether that's 600 lbs, or up to 1400 lbs. make sure to choose the right material for the retainers for your application also.
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: dodgeboy11]
#582832
01/15/10 12:43 AM
01/15/10 12:43 AM
|
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
|
Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
|
I didnt do it that way but I measured the height of the keepers in relationship to the retainers... I did this because I was concerned with the pressures and pulling through
|
|
|
Re: Valve locks: 10 or 7 degree?
[Re: ragtop]
#582833
01/15/10 06:49 AM
01/15/10 06:49 AM
|
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
Mike Swann
super stock
|
super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
|
Super seven's grip the valve stem more postively, than a ten degree. I have ran both and closely montiored the valve lock wear and fragmentation over time. I have cracked tens, but never a seven. The seven's are clearly superior. Also, this is the keeper arrangement of choice for NASCAR cup cars.
8.30's @3400 lbs
|
|
|
|
|
