alum. roller rocker life span

[wirenut]

How often should these be replaced when used for drag racing?
Are there signs of wear?

 

[sst3193]

I run the same set of Mopar (Crane) rockers for 8 years and never had a problem. Was running a Comp .650 lift flat tappet, but I would expect an aggressive solid roller could require rocker inspection or replacement on a yearly basis.

 

[70aarcuda]

depends on valve spring pressure....hydraulic cam with the appropriate springs probably last forever

 

[moper]

What camshaft do you have and rpms do you take it to? What brand of rockers?
A lot depends on setup and the quality of the brand.

 

[bOb shingler]

What camshaft do you have and rpms do you take it to? What brand of rockers?
A lot depends on setup and the quality of the brand.

this is a perfect statement.

 

[wirenut]

solid cam 588 lift
6400 rpm
I have not removed them yet but believe they are Harland Sharp

 

[70aarcuda]

solid cam 588 lift
6400 rpm
I have not removed them yet but believe they are Harland Sharp

solid cam...probably 140 lbs on the seat...350 over the nose...

probably last forever...

 

[CPDave]

Ran a solid cam -

Lift:0.541"/0.522"
Duration (Advertized):284°/288°
Duration (@ 0.050" lift):242°/246°

For nine years with the same aluminum rockers (a decent but not premium set (Scorpion I think)). Changed the valve springs out once about year 7.5. The motor spent most of it's life with a 7400 RPM chip in the MSD 6AL, then the last season I pulled the chip out of the MSD and stuck it in the shift light, and it pulled to 8200. This was for autocross, so the motor would get 4 runs at local events (around 9 events/year) spinning between 2500 and 8200 for somewhere between 40 seconds and a minute 10 or so. That motor is apart now and I won't be reusing the rockers (or the connecting rods), but it was running fine when it was pulled. It also had around 10,000 (juvenile) street miles on it.

Dave

 

[CHEATHAM]

ive had sharps since 1988 used on solids and rollers and circle track to drag cars theyr tuff, but im sure spring pressures and leaving them sit without turning a engine over with hi pressures may have an effect on there life span

 

[bad440]

Good ones years,cheap ones months or weeks....

 

[wirenut]

Thanks everyone for the feedback!!!