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Author Topic: running in rebuilt engine...  (Read 4000 times)

Offline Horney

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Re: running in rebuilt engine...
« Reply #20 on: 14 June 2011, 18:44 »
Ask the builders is the best bet although if they build race engines they generally get an all out thrashing from the first turn of the key :grin:

I've built a few engines and and other than bedding in new cams on idle I've never "run them in". First 100 miles just pottered up and down the revs, checked for leaks and any problems and then given them full beans from then on.

nick
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Offline russ-vdub

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Re: running in rebuilt engine...
« Reply #21 on: 14 June 2011, 19:32 »
Ima firm believer that old engines need running in time but new cars dont. I wouldnt personally but its your choice.
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Offline andynorfolk

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Re: running in rebuilt engine...
« Reply #22 on: 14 June 2011, 19:36 »
really hope the garage tell me to thrash it, if there's one thing i'm good at it's thrashing ;) aha (once everything's up to temp obvs) :)
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Offline Wayne

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Re: running in rebuilt engine...
« Reply #23 on: 14 June 2011, 20:27 »
Quote from: andynorfolk on 14 June 2011, 19:36
really hope the garage tell me to thrash it, if there's one thing i'm good at it's thrashing ;) aha (once everything's up to temp obvs) :)

That is the one thing I would not do with a new / rebuilt engine.
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Offline andynorfolk

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Re: running in rebuilt engine...
« Reply #24 on: 14 June 2011, 20:33 »
well according to some people that will increase the power output and life expectancy of the engine...
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Offline Wayne

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Re: running in rebuilt engine...
« Reply #25 on: 14 June 2011, 20:43 »
Quote from: andynorfolk on 14 June 2011, 20:33
well according to some people that will increase the power output and life expectancy of the engine...

Or shorten it, trust me I have seen it happen, your choice but noit something I recommend.
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Offline andynorfolk

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Re: running in rebuilt engine...
« Reply #26 on: 14 June 2011, 20:47 »
i'll go with whatever the company that are rebuilding it say aha
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Offline Wayne

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Re: running in rebuilt engine...
« Reply #27 on: 14 June 2011, 20:52 »
Quote from: andynorfolk on 14 June 2011, 20:47
i'll go with whatever the company that are rebuilding it say aha

Well I would but what ever happens I would take it easy for the 1st 1000miles.
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Offline danny_p

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Re: running in rebuilt engine...
« Reply #28 on: 14 June 2011, 21:32 »
modern engines wear in quick

keep the revs down to start with but get the throttel open as well.

rings need to bed in to the cylinders and no throttel = no pressure and the cylinder can polish up before the rings have bedded in.  it'll use oil for about 30,000 miles then

i personaly run motors in hard and fast,   about the time it comes upto temp is when it'll start seeing full throttel only to 3000 rpm tho  after 5 or 10 minutes it'll see 4000 rpm then 5000 after 100 or 200 miles it'll meet the limuter
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Offline mk2bal

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Re: running in rebuilt engine...
« Reply #29 on: 14 June 2011, 21:33 »
That's the thing, if car producers dyno their brand new engines then surely you can't do much worse (I know it will be loaded more with car weight to pull along etc) but it makes you wonder.. However maybe its because the component materials are better nowadays? I'd prob still have to ease the power in over time myself though, build up to it physically, and mentally :)
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