LS9/ZR1 .660" Lift Dual Spring Kit, first to market!
09-06-2012, 07:43 PM
#1
LS9/ZR1 .660" Lift Dual Spring Kit, first to market! I'm very proud to introduce my latest new product, a drop in Dual Spring kit for ZR1 engines!
Until now, no one has offered a dual spring kit for the ZR1 heads. The titanium intake valves use lash caps like the LS7 heads which forced GM to move the lock grooves down on the valves.
All other LS dual spring kit will lose almost .100" of installed height with these new LS9 valves and will cause coil bind by approximately .600" lift.
Our new kit features retainers designed specifically for the LS9 heads and valves. This kit allows the durability and safety of dual springs, at beehive spring prices! More info and orders can be placed here: http://www.briantooleyracing.com/660...r-zr1-ls9.html
Until now, no one has offered a dual spring kit for the ZR1 heads. The titanium intake valves use lash caps like the LS7 heads which forced GM to move the lock grooves down on the valves.
All other LS dual spring kit will lose almost .100" of installed height with these new LS9 valves and will cause coil bind by approximately .600" lift.
Our new kit features retainers designed specifically for the LS9 heads and valves. This kit allows the durability and safety of dual springs, at beehive spring prices! More info and orders can be placed here: http://www.briantooleyracing.com/660...r-zr1-ls9.html
03-14-2013, 11:08 AM
#3
This is worth a bump today. Shops are using the standard spring kits on LS9 engines, and that's a recipe for disaster.
The LS9/ZR1 heads have a lot shorter installed height than any other LS heads made and will put a set of .660" lift springs in coil bind by about .610" lift. GM moved the lock groove down to accommodate the lash caps for the titanium intake valves.
These retainers are designed with a taller installed height compared to standard retainers.
The LS9/ZR1 heads have a lot shorter installed height than any other LS heads made and will put a set of .660" lift springs in coil bind by about .610" lift. GM moved the lock groove down to accommodate the lash caps for the titanium intake valves.
These retainers are designed with a taller installed height compared to standard retainers.
Last edited by Brian Tooley Racing; 03-17-2013 at 01:51 PM.
05-18-2013, 11:43 AM
#6
This is worth a bump today, as I've had another standard spring kit sold to someone needing the LS9 specific kit.
The LS9 heads have a .100" SHORTER INSTALLED HEIGHT THAN ANY OTHER 15 DEGREE HEADS. So if the wrong retainers are used, coil bind will occur with a .600" lift cam.
The LS9 heads have a .100" SHORTER INSTALLED HEIGHT THAN ANY OTHER 15 DEGREE HEADS. So if the wrong retainers are used, coil bind will occur with a .600" lift cam.
