what dual valve springs for the 306 cam?
10-11-2007, 09:34 PM
#1
Melting Slicks
Thread Starter
what dual valve springs for the 306 cam?
Just wondering what a good dual spring is out there that will handle the comp cam 306?
10-12-2007, 09:50 AM
#2
Race Director
I don't remember, but I do remember on their website you can select a cam and then they will recomend a spring. It will show specs and part numbers. Try that.
10-23-2007, 03:24 PM
#5
Safety Car
Actually the 10308 is the PN to a kit with PN 99893 Dual springs, Retainers, spring seats and valve locks.
http://www.cranecams.com/?show=brows...Number=10308-1
PN 99893 Springs set up at 1.850 (which is +.100 tall compared to stock), they coil bind at 1.080. Assuming .060 before coil bind they will safely go to .710 MAX lift.
http://www.cranecams.com/index.php?s...&lvl=3&prt=123
IMO if your over .600 lift these springs are a very good choice. If your under .600 lift you better have very light retainers and locks to get as much weight as you can off the spring. "Spring surge" could be a problem because of all the free travel that would be left in the spring at lifts under .600.
Will
http://www.cranecams.com/?show=brows...Number=10308-1
PN 99893 Springs set up at 1.850 (which is +.100 tall compared to stock), they coil bind at 1.080. Assuming .060 before coil bind they will safely go to .710 MAX lift.
http://www.cranecams.com/index.php?s...&lvl=3&prt=123
IMO if your over .600 lift these springs are a very good choice. If your under .600 lift you better have very light retainers and locks to get as much weight as you can off the spring. "Spring surge" could be a problem because of all the free travel that would be left in the spring at lifts under .600.
Will
10-23-2007, 03:31 PM
#6
Melting Slicks
Thread Starter
Actually the 10308 is the PN to a kit with PN 99893 Dual springs, Retainers, spring seats and valve locks.
http://www.cranecams.com/?show=brows...Number=10308-1
PN 99893 Springs set up at 1.850 (which is +.100 tall compared to stock), they coil bind at 1.080. Assuming .060 before coil bind they will safely go to .710 MAX lift.
http://www.cranecams.com/index.php?s...&lvl=3&prt=123
IMO if your over .600 lift these springs are a very good choice. If your under .600 lift you better have very light retainers and locks to get as much weight as you can off the spring. "Spring surge" could be a problem because of all the free travel that would be left in the spring at lifts under .600.
Will
http://www.cranecams.com/?show=brows...Number=10308-1
PN 99893 Springs set up at 1.850 (which is +.100 tall compared to stock), they coil bind at 1.080. Assuming .060 before coil bind they will safely go to .710 MAX lift.
http://www.cranecams.com/index.php?s...&lvl=3&prt=123
IMO if your over .600 lift these springs are a very good choice. If your under .600 lift you better have very light retainers and locks to get as much weight as you can off the spring. "Spring surge" could be a problem because of all the free travel that would be left in the spring at lifts under .600.
Will
10-23-2007, 03:36 PM
#7
Race Director
Also, with stock valves/seats you will be lucky to get a 1.750 installed height. But, you can use a +.050 lock to get 1.80. However, then you will need non self-aligning rockers/hardened push rods/push rod guides.
10-24-2007, 08:49 AM
#8
Safety Car
If your only going .540 lift, the Comp 986-16 sets up at 1.750 (122lbs) and coil binds at 1.150. Assuming .060 for coil bind they will go .540 lift on the nose.
http://store.summitracing.com/partde...400114+300362+
Summit list all the associated parts (Retainers, Locks Spring Seats ect.)on their website also.
Will
http://store.summitracing.com/partde...400114+300362+
Summit list all the associated parts (Retainers, Locks Spring Seats ect.)on their website also.
Will
10-24-2007, 09:51 AM
#9
Safety Car
My AFR heads have Crane 99893-16 springs with Comp 730-16 retainers and I am running the CC-306 and have zero problems with this setup keep in mind with 1.6 Rockers you will be at .576 lift so dont spec your springs to .540 unless you plan onstaying with 1.5 rockers. It looks like Comp recomends the Behive spring P/N 26918-16 with a speced max lift of .600
Last edited by FD2BLK; 10-24-2007 at 09:59 AM. Reason: added Comp PN
10-24-2007, 10:26 AM
#10
Melting Slicks
Thread Starter
My AFR heads have Crane 99893-16 springs with Comp 730-16 retainers and I am running the CC-306 and have zero problems with this setup keep in mind with 1.6 Rockers you will be at .576 lift so dont spec your springs to .540 unless you plan onstaying with 1.5 rockers. It looks like Comp recomends the Behive spring P/N 26918-16 with a speced max lift of .600
10-24-2007, 11:54 AM
#12
Melting Slicks
Thread Starter
when I got the cam on the card it said to use the 918 but since the 918 has had alot of bad springs now for a while I went with the PAC spring. They used to be the supplier for the 918
10-24-2007, 12:50 PM
#13
Race Director
10-24-2007, 01:12 PM
#14
Safety Car
-- Joe
10-24-2007, 01:22 PM
#15
Melting Slicks
Thread Starter
Hmm, strange. Here are the recommended parts that is says to use.
RECOMMENDED COMPONENTS
VALVE SPRINGS 26915-16 OR 26918-16
RETAINERS 787-16
VALVE LOCKS 648-16
PUSHRODS 7608-16 OR 7940-16
ROCKER ARMS 1417-16 OR 1317-16
TIMING CHAIN 3206
LIFTERS 850-16 OR 875-16
RECOMMENDED COMPONENTS
VALVE SPRINGS 26915-16 OR 26918-16
RETAINERS 787-16
VALVE LOCKS 648-16
PUSHRODS 7608-16 OR 7940-16
ROCKER ARMS 1417-16 OR 1317-16
TIMING CHAIN 3206
LIFTERS 850-16 OR 875-16
10-24-2007, 01:23 PM
#16
Melting Slicks
Thread Starter
