Cam Break In
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Freshman User
Joined: Dec 2015
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Cam Break In
I was hoping someone could help out with this. I just put a new Summit Cam(285/.456 lift) and lifters in my 70 302, I also put in new valve springs from Trick Flow (115.0@1.700, Open 285.0@1.200, 340 rate, coil bind 1.113). My question is, are the valve springs pressure too much for the cam break in period. I have seen some online videos that suggest that the lighter the spring, the better. I just don't want to screw up my new cam. And the last time I installed one was 30 years ago. Would I be okay with this combination? Thanks.
Lead Driver
Joined: Aug 2003
Posts: 7,592
Likes: 10
From: **** hole San Jose ca.
In most cases best to use lighter springs for break-in. But what's the differences between the stock springs the new ones.
Second is most importance is using the correct type of oil for flat tappet motors.
And did you change out the push rods or reuse the old ones?
When using old push rods hopefully you rolled them on a flat surface checking for any bent ones. Bent push rods don't turn very good that can cause the lifter not to turn that ends up with cam lobe failure soon after start up.
But you may know all this stuff.
This may not may have answered your question, but as you may get more info down in the Engine forum page.
Orich
Second is most importance is using the correct type of oil for flat tappet motors.
And did you change out the push rods or reuse the old ones?
When using old push rods hopefully you rolled them on a flat surface checking for any bent ones. Bent push rods don't turn very good that can cause the lifter not to turn that ends up with cam lobe failure soon after start up.
But you may know all this stuff.
This may not may have answered your question, but as you may get more info down in the Engine forum page.
Orich
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Freshman User
Joined: Dec 2015
Posts: 26
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Thanks for the reply, I checked the pushrods and they looked good. I was not sure what the specs were on the old springs. I live fairly close to all of the race shops and I bought Joe Gibbs break in oil, it's ready to go, I for some unknown reason thought that I would check youtube for extra pointers on break in (since I have not done it in awhile), and now I am second guessing myself.
Post Fiend
Joined: Feb 2008
Posts: 5,831
Likes: 121
From: St Albert, Alberta
Yup that is the ticket Fill with a CI-4 rated oil like Rotella triple and add a break in additive such as Comp Cams break in additive. Summit has lots of break in additives available.
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