PSI Valve Springs
07-23-2017, 10:37 AM
#1
PSI Valve Springs Does anyone have any long term experience with PSI springs. Primarily two or more years and at least 30,000 miles. I'm looking at the 1511 beehive series for use on 243 heads as an install and forget. I realize that most if not all springs do need occasional monitoring.
07-23-2017, 10:56 AM
#2
TECH Senior Member
Which cam are you running? That makes a HUGE difference.
07-23-2017, 01:50 PM
#4
I just made the mistake of trying to use beehive pac12 springs with a BTR turbo cam... apparently the lobes were too aggressive for it and I ended up swapping in BTR dual springs... It all depends on what cam you have.
07-23-2017, 03:14 PM
#7
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Psi-1511ml Hi WS6, my experience AND Wegner Automotive's states the PSI-1511ML has NEVER broken.
The lift I use is in the .580"-.620" range with a HYD Camshaft.
This IS a common Valve Spring fitted onto GN-West engines.
Lance
The lift I use is in the .580"-.620" range with a HYD Camshaft.
This IS a common Valve Spring fitted onto GN-West engines.
Lance
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11-05-2018, 10:26 PM
#9
What do you mean setup correctly? Sorry to reply to a dead thread. I'm a novice and this will be my first time installing springs on heads. I have a set of 243 i want to put these on.
11-05-2018, 11:08 PM
#10
TECH Senior Member
I think what they are getting at is shimming them up so that at max lift, it is close to spring bind. This, I believe, prevents some harmonics that could present themselves if there is too much excess "lift room" in the spring.
11-06-2018, 07:05 AM
#11
You need to assess shimming requirements to get the required seat force (I typically shoot for 135# on the seat) and then look at lift and coil bind. I set all of this in a spreadsheet and track each valve spring when I set them up. PSI are fabulous springs, but they won’t support a donkey dick type of cam. I wouldn’t go over 0.600 lift since you will likely need some shims to get the proper seat value. Likely your heads won’t support a huge lift anyhow.
01-22-2020, 09:21 PM
#12
Thanks for the explanation. That makes allot of sense now
01-22-2020, 09:22 PM
#13
You need to assess shimming requirements to get the required seat force (I typically shoot for 135# on the seat) and then look at lift and coil bind. I set all of this in a spreadsheet and track each valve spring when I set them up. PSI are fabulous springs, but they won’t support a donkey dick type of cam. I wouldn’t go over 0.600 lift since you will likely need some shims to get the proper seat value. Likely your heads won’t support a huge lift anyhow.
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01-23-2020, 01:14 PM
#18
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01-23-2020, 06:31 PM
#20
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