Quote:
Originally Posted by Ryephile
Brilliant post!
The Chevrolet Performance Parts LT1 PDF [on page 10] is an easy enough step-by-step that the average enthusiast should be able to follow it.
The Clif Notes is like this:
*warm up engine near idle RPM
*varying loads for 30 miles of driving, no WOT or redline. That literally means figures like 75% throttle and 5500 RPM are within acceptability and necessary for "varying loads". Transients OK, sustained high RPM are not-OK.
*consistent 50% throttle pulls to 4k RPM
*WOT pulls to 4k and engine braking to idle
*You should have maybe 32 miles by this point. Oil and filter change. UOA for data
*Drive it normally for 500 miles, but no camping at redline and no track-days, then another oil and filter change and UOA.
-->Remember! By the time you've taken delivery of your car the engine has already gone through the majority of its break-in with just a few miles on the odometer. Doing the above procedure is good practice, but it's also not required or rigid.
LT1 Break-in PDF
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If this is what you're refering to as a 'hard break in' then I'd also be in this camp... I thought you more ment jumping on the throttle from a stand still, dropping the clutch, taking it to the redline ect. This is a great break in procedure
Mind you i think i was about 1500km before changing my oil out...