ready to flush out break in lube...Brad Penn?

[RustyRatRod]

I've done cam break-ins with dual valve springs so much, I've forgotten how many. Never had a problem. Do it however you feel comfortable. But most anything under .600 lift you can get by with it.

 

[coloradodave]

"Thats what I figured. I'm not certain if it has double spring's, but I assume so. And I specifically asked the guy about it and he claimed it was ok to leave them in... What a joke. That's kinda why i'm excited about the fire up. I'm afraid of what it will do. Seems like the guy didn't know what the hell he was talking about."

The first and only thing to know is what the seat pressure of your springs is. If it is stock or close to stock, just fire it up and, as others have said, run the motor up to 2,000 - 2,500 RPM for 10 -15 minutes. Try to have the timing set pretty close before you fire it and it doesn't hurt to have a large box fan in front of the radiator to keep it cool. Use a break-in oil or an additive that contains zinc and phosphorous in regular oil.
Your mechanic should know best what the spring pressure is. If not, check your receipt and find the number and brand and look up the pressure at the recommended installed height.
Most builders don't use high pressure springs on street motors unless the customer requests them.

 

[fatecaptured]

Thank's a bunch, have been depressed all day over this. Glad to know I don't have to tear the valve train apart.:icon_salut:

Sorry for the thread hyjacking.

 

[wannadrag]

i was told not to use synthetic/ blend for at least 10,000 miles.

You do know Brad Penn also has 10w30

 

[RustyRatRod]

I would think approaching 150 seat pressure and you need to remove the inner springs.

 

[benno440]

just 1 question as to why you put 383 internals in a 400? just curious as to why not putting 440 internals in a 400 u generally dont go smaller do you?

 

[djais1801]

just 1 question as to why you put 383 internals in a 400? just curious as to why not putting 440 internals in a 400 u generally dont go smaller do you?

i went with the same internals because they are interchangable, and was able to re-use the parts from my original engine,thus saving me $$$

 

[RustyRatRod]

383 crank and rods are the same as the 400. Nothing "smaller" about them.

just 1 question as to why you put 383 internals in a 400? just curious as to why not putting 440 internals in a 400 u generally dont go smaller do you?

 

[1948 santa]

Just changed to Brad Penn on both of my cars on advice from a friend at machine shop,says it's the same as Kendall.

 

[snakeoil24]

Brad Penn is making their oil in the old Kendall facility.