Quote:
Originally Posted by AndyUK
You are isolating an single statement and implying it means something that it doesn't. If you read all of the material available from GM on break in procedure it fills in the blanks.
There's a break in manual specifically for the LT1 engine.
It does not contradict that text from the camaro manual.
You will note that the camaro manual says avoid full throttle starts and abrupt stops, it does not say to avoid full throttle at all times.
It seems some people can't understand plain English. They assume "avoid full throttle starts" means "baby the throttle", but it doesn't.
The engine needs load to bed in correctly, the LT1 engine break in manual is very explicit in requiring part and full throttle runs (up to 4000rpm and with in gear rundown) as being the correct procedure.
If you drive the whole of the first 1500 miles with less than 50% throttle then you'll end up with a motor thats not sealed as good as it could be and down on power.
Given the hundreds of dollars people seem to be willing to spend to gain 5 to 10hp, taking the 5 minutes to find and read the engine break in manual doesnt seem too difficult.
Credit to Matt for posting these, please note that these do NOT contradict the chevrolet camaro manual instructions, they are just more detailed. The youtuber in the video has made the same mistake and assumed the wrong thing about what the Corvette/Camaro instructions actually mean.;
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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