noluck
Probationary Member
- 24
- 0
- Feb 1, 2007
-
Atlanta,
Georgia
I have BC stage three cams. Can a stock valvetrain handle it? The head has been rebuilt.
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Even with 272's you would have to shim the springs, and it would still be risky, with 280's...... NO
Don't post info that you don't know about. Stock springs are not an issue with a 272 varient cams & no spring shimming is requiured. Sure an upgraded spring or shimming isn't a bad idea but defently isn't required for this cam size. I would only look at upgrading my springs if my stockers were origionals with high milage. 280's on the otherhand will require upgraded springs, & BC offers an upgraded single spring that will work perfect with the 280's.
I disagree. If you plan on fully using the 272's you are going to rev past redline. Ive personally seen 272's break stock springs. But he was revving the motor above 8k rpm I believe.
Then he was running wore out stock springs. . . Research.
I've seen 3 setups run stock springs to the common 8500rpm level (where 272s peter out), w/ zero float.
Broken valve springs due to 272s w/ "normal" ramp rates and 8500rpm rev limit is so very unusual that it shouldn't be a purchaser's concern.
Why research when this was from personal experience. I myself would not install 272's on stock valve train. My mechanic blew his valve train on a newly built head and on another guys car when he installed them. He wont even install them on stock valve train if you ask him. Its Jack at jackstransmissions.com and he knows what he is talking about.
Anyways there is a risk of them breaking so I would not just go around saying its ok and they will work perfect. I even emailed BC and they said they would work only if you are staying within the stock redline. Any higher revving gets risky.