Valve Spring specs needed.
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LSX RWD S/C conversion
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From: Maple Ridge, BC, Canada
Valve Spring specs needed.
I am trying to get all the parts ordered for the 300+hp Build now that I will have stage 2 shortly. The problem is that I need to know the outside\inside diameter and seat\open pressure of our stock valve springs. I have found the cam used in the build but for some unknown reason there is no cross reference to the springs\retainers that would match up for our valve train. If someone knows the answer I would really appreciate you letting me know. Thanks.
I'm old school
Joined: 02-16-05
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From: Nashville
I don't have the answers. But you can probably call Ferrea and ask them. They already have a product for the L61 engine, but not for the LSJ. They might be able to find out for you better then anyone.
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From: No where man
Originally Posted by victory_red_SS
I am trying to get all the parts ordered for the 300+hp Build now that I will have stage 2 shortly. The problem is that I need to know the outside\inside diameter and seat\open pressure of our stock valve springs. I have found the cam used in the build but for some unknown reason there is no cross reference to the springs\retainers that would match up for our valve train. If someone knows the answer I would really appreciate you letting me know. Thanks.
Valve Spring Load Valve Closed @32.5 mm - 271.0 Newton (61.1lbs) minimum 245 N (55.1lbs)
Valve Spring Load Valve Open @22.5 mm - 575.0 Newton (129.5lb) minimum 525 N (118.2lbs)
Valve Spring Load Valve Open @22.5 mm - 575.0 Newton (129.5lb) minimum 525 N (118.2lbs)
HTH
WopOnTour
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From: East Brunswick, NJ
Do you plan on revving higher than your limiter?
Also, does anyone know what is the highest RPM the M62 can spin up to without heatsoaking real bad and still generate power? Just curious.
Also, does anyone know what is the highest RPM the M62 can spin up to without heatsoaking real bad and still generate power? Just curious.
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LSX RWD S/C conversion
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Joined: 03-25-05
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From: Maple Ridge, BC, Canada
Originally Posted by WopOnTour
All I can give you tonight is the spring seat pressure spec, the dimensions I'll have to get you tommorrow
The OPEN spec is at 10mm valve lift
HTH
WopOnTour
The OPEN spec is at 10mm valve lift
HTH
WopOnTour
Originally Posted by NJHK
Do you plan on revving higher than your limiter?
Also, does anyone know what is the highest RPM the M62 can spin up to without heatsoaking real bad and still generate power? Just curious.
Also, does anyone know what is the highest RPM the M62 can spin up to without heatsoaking real bad and still generate power? Just curious.
I'm old school
Joined: 02-16-05
Posts: 6,905
Likes: 3
From: Nashville
Here's what I've learned about increases the RPM limit so far.
Ferrea springs without the optional valve seat are usable on the street and safe up to 8000 RPM. With the optional seat, they are not streetable, and can run to over 10000 RPM. There is some question as the ability of the stock hydraulic lifters maximum RPM. Bates engineering makes a solid lifter that is safe to over 10000 RPM, but makes for a non-daily drivable car (solid lifters driven daily will wear out your cams)
In discussing the benefits of increased RPM with many pros, the horsepower will increase, but the torque will start to drop. Plus, for every increase in RPM, the bearing load increases 4 fold, so reliability starts to drop as well.
Ferrea springs without the optional valve seat are usable on the street and safe up to 8000 RPM. With the optional seat, they are not streetable, and can run to over 10000 RPM. There is some question as the ability of the stock hydraulic lifters maximum RPM. Bates engineering makes a solid lifter that is safe to over 10000 RPM, but makes for a non-daily drivable car (solid lifters driven daily will wear out your cams)
In discussing the benefits of increased RPM with many pros, the horsepower will increase, but the torque will start to drop. Plus, for every increase in RPM, the bearing load increases 4 fold, so reliability starts to drop as well.
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