valves staying open with new cams

[bigal07]

I recently pulled my motor and had the head off. I bought new brian crower 272 cams and fidanza cam gears. I installed the exhaust cam and turned it manually with a rachet and when the right valves open the ones that should be closed stay open about 1/16 to 1/8 of an inch. All the parts of the head are off a stock 7 bolt, nothing replaced in the build except for the cams. What could cause the valves to stay open when they shouldnt?

 

[DSM_ThuNDeR]

could be the valve springs might want to upgrade anyways since you got yourself 272's

 

[Black91TSiAWD]

did you bleed the lifters?

 

[bigal07]

I already had a guy tell me that the springs are just fine, with 280's you need new springs.

 

[PIMking]

I thought that 2g's had softer valve springs than 1g's. I know on 1g's that 272s are okay with stock springs as long as your not running in the mid 7k mark but they are reccomended to upgrade.

 

[redyute1]

u need to collapse the lifters put them in a vise between two pieces of wood and close the vise slowly till the lifter collapses one at a time and remember slowly

 

[1992awdlaser]

u need to collapse the lifters put them in a vise between two pieces of wood and close the vise slowly till the lifter collapses one at a time and remember slowly

Don't use a vise. You can easily damage them like that. Follow this vfaq. http://vfaq.com/mods/lifters.html

 

[PIMking]

if your that worried about the Lifters buy new ones they are not that exspensive.

 

[1992awdlaser]

I thought that 2g's had softer valve springs than 1g's. I know on 1g's that 272s are okay with stock springs as long as your not running in the mid 7k mark but they are reccomended to upgrade.

I have fp2's (272's) in my car with stock springs. I rev to 8k without a hint of valve float. Sometimes it goes higher than that since my limiter is set at 8250. Just so you know for the future.

 

[spooled_u_1st]

Definitely need to bleed your lifters or if your budget permits get a set of topline revised 3g lifters.

 

[peypey's ride]

Hey bigal07, its me Nick, the guy you talked to earlier. So how is it coming? Have you collapsed the lifters yet?