xe 274 comp cam breakin

[95th67cam]

comp says to leave the inner spring out for breakin. any other suggestions? what oil do you suggest? my motor is a 350 with iron eagle platinum 200's. i bought the complete kit with springs and all. I heard one suggestion of using a 1.2 rocker arm for the breakin period. changing the springs seems, well, like a lot of work after its all together, but if that's the way it is then so be it. thanks for your advice.

[want-a-be]

The springs can be changed right in the car with out taking the heads off with the correct tool. I have one that I'll be marketing soon that beats out everything else I have seen or used. But of course that doesn't help you I guess.

I've had good luck breaking in flat tappet cams. I've not used the rockers or the lighter springs. I use a good molley lube on the cam lobes and the lifters. Make sure to prime the oiling system to where oil is comming out all the pushrods.

Works for me.

Don

[lun40119]

Just did a flat tappet breakin last weekend. We used VR1 20w50 with Lucas breakin additive, and some EOS. No inner springs!!!!!!!!!!!! Went very well.

[Awesome Bill]

Use the Break in oils that are now available. keep the engine rpm around 1500-2000 for about 10-15 minutes, do not turn the engine off once started so make sure everything is good. I don't do the inner spring or rocker deal. The moly lube is good but boron, and zinc and sulfur have to be in there for extreme pressures. The break in oils from LAE or the best!

[CNC BLOCKS]

Most of our solid flat tappet engines have around 160 @ the seat and 400 over the nose and we have either 1.2 rockers or 1.35 rockers for break in and on the shaft systems we remove the inner springs.

The oil we have been using the last few years for break ins is the http://www.cen-pe-co.com/ as it has 2300 PPM of zinc my shop and alot of the shops I deal have been using this oil with great success.

When ever we order flat tappet cams we order P-55 cam cores which is considered a performance core which is harder then a standard cam core, Lifters if they are hyd. we use only the lifters from GM which have a hard puck on the bottom and on the solid flat tappet cams we use tool steel lifters, So far no problems with break ins.

Good luck with your break in!!

[Awesome Bill]

that is very interesting, is this the Delphi lifter?

[CNC BLOCKS]

that is very interesting, is this the Delphi lifter?


Bill

That is the Delphia lifters, When lifter problems were showing up about 8 years ago and we were using the GM lifters and no problems but other shops I deal with were losing Hyd. cam on the dynos and fat tappet cams were a bigger problem because of the off shore lifters coming in the U.S.

99% solid flat tappet stuff we run .875 lifters and we bought every Eaton lifter we could find as they had the black bottoms on them and when that suppy ran abut 2 years ago we have been using the tool steel lifters by PPC and no issues so far, Plus we send them back to be resurfaced.

Even cam cores the P-55 should be raised lettering in the core if not a Chinese take off and it will fail.

[Awesome Bill]

I will keep that in mind. I have always used the Delphi Lifters and just learned 1 of the US lifter manufactures had about 22 million lifters go out and were not done correctly. The process in making them was corrupted and they did not catch it and they also did not correct it. They let them stay in the market. They were just purchased by the other company, you will know who being your in the business. I have used their lifters and had problems to the point I tell me customers not to purchase their cam and lifter kits and get us to install. It is very hard to get a street guy to go .875 even just the standard ream job. So .842 is still very popular. I have changed up the oil treatments and break in oils and have done 100% better. Thanks for the good advise.

[Trmnatr]

I will keep that in mind. I have always used the Delphi Lifters and just learned 1 of the US lifter manufactures had about 22 million lifters go out and were not done correctly. The process in making them was corrupted and they did not catch it and they also did not correct it. They let them stay in the market. They were just purchased by the other company, you will know who being your in the business. I have used their lifters and had problems to the point I tell me customers not to purchase their cam and lifter kits and get us to install. It is very hard to get a street guy to go .875 even just the standard ream job. So .842 is still very popular. I have changed up the oil treatments and break in oils and have done 100% better. Thanks for the good advise.

Street guys get something in their head to save $ and its hard to have them do it right. We get guys that want to save $ by no using a tq plate. Certain things like this i refuse to do

I have used 2 flat tappet cams since 2000/2001, i stopped using flat tappet cams then and went to nothing but solid roller or hyd roller

[Awesome Bill]

I use a few Erson cam kits for the 383 STREET HEAT series engine we do a lot of. I always push the hyd roller but don't get to do it much. I agree, flat tappet is a waste for what is at stake.