ls6 Springs and these Lobes???
Thread Starter
Teching In
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ls6 Springs and these Lobes??? i was hoping these might work with ls6 springs whats Your thoughts.
Lunati 20540713 (Formerly Part Number 60513) GM V8 LS Gen III/IV, 3-Bolt Hydraulic Roller Voodoo 3-Bolt Core Camshaft RPM Range 1800 - 6400 Lift .549"/.549" Dur.@.050 217/223
i think lunati these lunati springs are speced for the cam.
Type: .600" Lift Ovate Beehive Valve Spring
O.D. Big End: 1.290"
I.D. Big End: 0.885"
O.D. Small End: 1.055"
I.D. Small End: 0.650"
Coil Bind: 1.140"
Seat Load: 130@1.800"
Open Load: 318@1.200"
Rate (lbs/in): 313
Quantity: 16
Part Number: 74818-16
Previous Part Number: 74818LUN
thanks
Lunati 20540713 (Formerly Part Number 60513) GM V8 LS Gen III/IV, 3-Bolt Hydraulic Roller Voodoo 3-Bolt Core Camshaft RPM Range 1800 - 6400 Lift .549"/.549" Dur.@.050 217/223
i think lunati these lunati springs are speced for the cam.
Type: .600" Lift Ovate Beehive Valve Spring
O.D. Big End: 1.290"
I.D. Big End: 0.885"
O.D. Small End: 1.055"
I.D. Small End: 0.650"
Coil Bind: 1.140"
Seat Load: 130@1.800"
Open Load: 318@1.200"
Rate (lbs/in): 313
Quantity: 16
Part Number: 74818-16
Previous Part Number: 74818LUN
thanks
Not a stock GM cam, don't bother trying to use a stock spring. I know some vendors try to attract cheapskates saying mild low rpm grinds are OK with these springs, but if a good spring is not in the budget neither is a cam.
You probably aren't going to be using it's lightweight valves and you will be needing to spin more rpm, two BIG disqualifiers even before we consider an aftermarket lobe likely being more aggressive a ramp than a production OEM cam.
If you want a cam to use stock springs stick to a stock cam AND limit valve weight to what was used with that combination of cam and spring.
For example LS6 springs will NOT work right with an LS6 cam and stock LS1 valves because the LS1 valves are solid and heavier.
You probably aren't going to be using it's lightweight valves and you will be needing to spin more rpm, two BIG disqualifiers even before we consider an aftermarket lobe likely being more aggressive a ramp than a production OEM cam.
If you want a cam to use stock springs stick to a stock cam AND limit valve weight to what was used with that combination of cam and spring.
For example LS6 springs will NOT work right with an LS6 cam and stock LS1 valves because the LS1 valves are solid and heavier.
For example LS6 springs will NOT work right with an LS6 cam and stock LS1 valves because the LS1 valves are solid and heavier.
***Not true, they work fine. I've had two with no problems, winding up to 7k rpm.
***Not true, they work fine. I've had two with no problems, winding up to 7k rpm.
The lobes on that cam have a ramp rate of 50, way to aggressive for the LS6 valve springs. I'd look for a cam that has at least a ramp rate of 55 or higher before even considering using LS6 valve springs. Even then I'd want better, stiffer springs.
Use the suggested springs for that camshaft as the LS6 springs have nowhere near those pressure specs. The Voodoo line of cams are more aggressive than a GM LS6 stick so even though the lift may trick you into thinking it will work....NOT the case.
A valve train is a system of engineered parts and needs to be matched correctly or the disaster can be catastrophic.
A valve train is a system of engineered parts and needs to be matched correctly or the disaster can be catastrophic.
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Verdad Gallardo Thread Starter
Teching In
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Great point! this is a budget build and yet i know i will want endurance. im not sure if there is any other budget routs other than just swapping to 243's. as for swaps as i prefer the 200 cc intakes for a tq build.
There is a lot of room to grow in cams before endurance is a problem.
Again talk to a vendor they can pick a mellow lobe and spring to handle it long term.
http://www.hotrod.com/how-to/engine/...st-comparison/
LS6/2 cam floated at 6200
Again talk to a vendor they can pick a mellow lobe and spring to handle it long term.
http://www.hotrod.com/how-to/engine/...st-comparison/
LS6/2 cam floated at 6200
Last edited by 96capricemgr; Jan 23, 2015 at 08:58 AM.
Thread Starter
Teching In
Joined: Nov 2008
Posts: 44
Likes: 0
There is a lot of room to grow in cams before endurance is a problem.
Again talk to a vendor they can pick a mellow lobe and spring to handle it long term.
http://www.hotrod.com/how-to/engine/...st-comparison/
LS6/2 cam floated at 6200
Again talk to a vendor they can pick a mellow lobe and spring to handle it long term.
http://www.hotrod.com/how-to/engine/...st-comparison/
LS6/2 cam floated at 6200
I would not use LS6 springs for anything aftermarket. There is no point...130-150.00 will get you a quality set of beehives or duals from BTR or PAC. Valve springs are the last thing in a motor you ever want to skimp on.
