Time for someone to build billet cam cap replacements.
I just bought all new bolts. journals all look good.
bbundy
07-01-2016 02:04 PM
Originally Posted by 18psi
(Post 1342859)
was the car overrevved?
It broke as the car was pulling through a finish at near the rev limit I have set. 8600 rpm.
18psi
07-01-2016 02:07 PM
I have a theory why it broke ;)
psyber_0ptix
07-01-2016 02:17 PM
boop
Originally Posted by 18psi
(Post 1342863)
I have a hypothesis as to why it broke ;)
bbundy
07-01-2016 07:01 PM
Im using Carrillo A-beam rods as well. small bolts. probably living dangerously.
EO2K
07-01-2016 07:57 PM
Cripes Bob. Did you pull the head yet? What do the #4 valves look like?
thumpetto007
07-01-2016 08:17 PM
holy shit. 8600rpm?
I can't even imagine the drivetrain vibration and noise at that rpm. It is almost unbearable in my (street) car at 7200rpm.
bbundy
07-01-2016 11:32 PM
Originally Posted by EO2K
(Post 1342969)
Cripes Bob. Did you pull the head yet? What do the #4 valves look like?
Valves and cam journals and everything look perfect didnt pull it. I put a new cam and cam cap bolts in and it runs great again. The only lifter buckets that showed odd wear were the two on the #4 intake. they are on back order though. They were Supertech shim under bucket lifters quite a bit lighter weight than stock. springs are also Supertech the medium doubles.
the intake valves are also Supertech and I think they are ones made before supertech changed there manufacturing process because I have never expeianced seat wear with them that other people have.
I suspect one of the cam cap bolts on the back cam journal broke first and with the end of the cam not being suported it had some bending moment and the reverse bending cycles eventually killed it.
Stealth97
07-02-2016 12:31 PM
I hope this never happens to me with my unobtanium cams...
