Holy Cow...3500 miles 6000 miles...!!! That's an awful lot of STREET miles..!! my guys have the springs out of there cars in a 1000 miles.But they REALLY use every bit of rpm there cams make and all the time too.
You guys driving on the hi way with all these miles racked up.
I put spray bars in any engine that I build that is going to see 3000 rpm for sustained periods.
Every set of comp roller lifters I've seen have been DEAD after 2 summers of street use with 275/600..Dirty oil with a bit of valve float I'm sure had plenty to do with it.
The oil in these 700 hp roller street engines is pretty much used up around 250 miles around here.
How hard are you guys driving these engines...
My guys stuff sees their red line 30-40 times a night when they drive them.
I don't think in all the time I've been building these roller engines have I EVER seen a set of rings go 6000 miles up here let alone a set of valve springs last that long