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**Tachyon** · 03-23-2010

I just broke in a new engine last weekend. I already had a tune for the setup so I could get on it without worrying about running lean.

I first let the car warm up to operating temperature, then I did repeated full-load, full-throttle 3rd gear accelerations followed by engine breaking in the same gear (18 psi). I did this for 20 minutes and then brought the car back for systems check. I've since then put about 300 miles on the engine and it feels very very crisp. I need to do a compression check, but will probably put another 500 miles on it before doing so.

I like to give the engine lots of load in the initial 20 miles or so. After that, just normal driving (which is quite heavy (weekend toy))

GL with your engine.

03-23-2010	#2
Tachyon Join Date: Jun 2004 Location: Prior Lake Drives: Icarus Posts: 1,375	Re: best break in method I just broke in a new engine last weekend. I already had a tune for the setup so I could get on it without worrying about running lean. I first let the car warm up to operating temperature, then I did repeated full-load, full-throttle 3rd gear accelerations followed by engine breaking in the same gear (18 psi). I did this for 20 minutes and then brought the car back for systems check. I've since then put about 300 miles on the engine and it feels very very crisp. I need to do a compression check, but will probably put another 500 miles on it before doing so. I like to give the engine lots of load in the initial 20 miles or so. After that, just normal driving (which is quite heavy (weekend toy)) GL with your engine. __________________ "The moment money becomes your motivation, you're immediately not as good as someone who is stimulated by passion and internal will" -Sebastian Vettel