04-11-2009, 11:57 AM
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#17 (permalink)
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Grand Prix of Endurance
Join Date: Nov 2008
Location: Tennessee
Posts: 3,476
Drives: Mulsanne Straight
Rep Power: 27
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Quote:
Originally Posted by In2Deep
An engine-builder friend once told me that over the first 1,000 miles
- Drive a new motor as you would normally around town
- For a performance engine -- run her through some higher rpm's every 75-100 miles, but not to redline. Ever. So, 10-12 run-throughts up through higher rpms within the first 1000 miles
- NEVER drive for a long period at the same speed (long trip) during this 1000 miles. but...
- take a 250 mile drive somewhere, on the freeway without stopping, and spend 10 minutes at a time holding various speeds, faster and slower. something like this.
10 mins at 55...then speed to....
60....10 minutes at 60...then speed up to...
70....10 minutes at 70...then slow to.....
55....10 minutes at 55...then speed up to...
75....10 minutes at 75...then slow to...
50....10 minutes at 50...then speed up to...
60....
Repeat.
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Quote:
Originally Posted by spearfish25
What benefit is there to holding the car for 10 minutes at a time at RPMS that are only going to differ by maybe 1000rpm b/w the slowest and fastest speeds (50 and 70mph)? Seems to me that varying between 2000rpm and 3000rpm won't be of much additional value.
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The engine it self needs a variety of fluctuating speeds, it will help it in the future to handle different speeds and performance.
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