|
Motor Break In
Taking delivery of a a new SPF w/a 351 stroked to 427. Now I know there are two schools of thought about the proper way to break in a fresh motor:
1. Drive it like you stole it; 2. Baby it for [approx.] 1000 miles. Any thoughts would be greatly appreciated. NEVER LIFT |
What motor is it? What did the builder tell you?
If there is a warranty, you should follow their instructions. If it's a Ford crate motor without warranty, you should baby it for the first 1,000 miles, and keep the revs 10% under max for the next 1,000
Then you can drive it like you stole it, if you aren't scared! :D OH, and change the oil at 500 miles, cut open the filter and take pics if there are any really nasty pieces or shards ! save the evidence if you have a warranty! |
Change the oil at a couple hundred miles, cut open the filter. If everything looks good, go for it.
|
agro1,
The link below shows break in procedures via Crane Cams web site. My builder suggested keep it over 1500 RPM - varying RPM for the first half hour between 2500 and 3500 RPM. Then change the oil after 1 hour or 100 miles. -wadesdad Crane Cams Installation Instructions |
For what it's worth, my engine builder advised keeping it under 3000rpm for the first 500 miles, then 500 rpm up for every additional 100 miles . Cam break in was not an issue due to its being a roller type. Plus usual stuff like not letting it slog, varying the revs on longer runs etc.
I found that full ring seal (and hence oil consumption stopping) didn't really happen until about 5000 miles, and I had surely been using the full rev range for a while before that. |
| All times are GMT -7. The time now is 08:46 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: