910 springs
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Lead Driver
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910 springs
Read Joe's remark to high mileage..etc on a motor, in regards to a BP-brake. Instead of hijacking the thread, i'd figure i'll throw it out.
Can these springs be installed anytime, and installed on a stock motor? What are the benefits of them, with a stocker motor...etc/ thanks.
Can these springs be installed anytime, and installed on a stock motor? What are the benefits of them, with a stocker motor...etc/ thanks.
Lead Driver
Joined: Sep 2005
Posts: 9,399
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From: Norco,CA
Most guys install them when they change the turbo. Some say it helps with the higher boost levels. They say a valve can stay open to long with all that pressure and higher RPM's. Same with the install of a higher lift cam.
Laughing Gas
Joined: Nov 2010
Posts: 1,193
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From: D.C. but heart's in TEXAS
Dunno, but someone did an AWESOME write-up with photos when Mueckster did his 910 springs. Might want to contact him to borrow his patented "McTool."
Here's a link: https://www.ford-trucks.com/forums/1...0-upgrade.html
Here's a link: https://www.ford-trucks.com/forums/1...0-upgrade.html
9 ECHO 1
Joined: Aug 2009
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From: Missouri
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Lead Driver
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Ok, but does different hp/tq #'s come into play? My stocker motor delivers 3k+ rpms at 500+ tq, is these numbers producing valve float?
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Joined: Jul 2006
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From: Bend, OR
Valve float is a boost/back pressure issue.
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
Valve float is a boost/back pressure issue.
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
Thread Starter
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Lead Driver
Joined: Sep 2010
Posts: 7,793
Likes: 50
Valve float is a boost/back pressure issue.
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
You could have a crap turbo making 25# of boost but 80psi of drive pressure float an exhaust valve ( extreme but making a point) or you can be making 40-50psi and float an intake valve.
An exhaust brake will increase the likelihood of valve float, which is why I suggested the springs. Make sure you shim them at install. I believe Swamps has a write up on there site, but I dare not link to a "non" sponsor...
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Valve float is not a constant issue. You can have weak valve springs allow valve float at lower PSI's but not have any other runability issues.
12psi boost should be about 18-20psi drive pressures on a stock turbo, I doubt your issue is valve float.
12psi boost should be about 18-20psi drive pressures on a stock turbo, I doubt your issue is valve float.
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