| [ Total Views: 816 | Total Replies: 11 | Thread Id: 58247 ] |
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 2443TT
A.k.a.: Ian
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| posted on November 5th, 2006 at 10:58 PM |
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Camshaft breakin, new engine, lube-a-lifters
Howdee,
I'm putting together my 2332 turbo engine again. This time with a set of new luba lifters from aircooled.net that have the full SLR hardening and
re-surfaceing treatment done.
I was thinking about the cam breakin procedure. Normal practice is to hold the RPMs above 1500-1800rpm so the camshaft gets enough splash oil
lubrication so that it runs in properly.
My question is, now that I have lube--a-lifters is this still necessary as they cam lobe gets direct librication from the lifter bore now...?
Or should I still do a normal break in, and get splash oiling plus lubrication from the lifters?
Cheers,
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 vw54
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| posted on November 6th, 2006 at 06:26 AM |
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I would be still running in the normal way so as to be sure its right
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on November 6th, 2006 at 08:32 AM |
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I would normally hold RPMs between 2000 and 2500, never below 2000.
Also use only your outer springs for as long as possible.
This is super important, even with the lube a lobe lifters,
especially with a ratio rocker cam, and heavy springs.
| Quote: | Originally
posted by westi
That's mad Alan.
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2443TT
A.k.a.: Ian
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| posted on November 6th, 2006 at 07:51 PM |
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The plan was to run the engine in again using just the outer springs, but they aren't exacly girly spring pressures either. The standard outers from
the dual springs that come with the comp eliminator heads are still pretty serious. At a guess good for 6000 rpm by themselves.
Thanks for the info.
It just makes be nervous starting a new engine and holding its revs at 2500 for 15 minutes straight off the bat. There is so much to be checking on
all at the same time, with monitoring afr's looking for oil leaks listening for noises etc. Plus that excitement of hearing your long coming project
breathing fire once again.
I remember last time the engine went together and I started it without a muffler to do the cam break in... well that was an experience! flames
occasionally blowing out the 2.5" turbo dump and loud! Can't wait to hear it again!
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on November 7th, 2006 at 09:04 AM |
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As long as the revs are above 2000 that will be fine.
Yeah, put a muffler on.
| Quote: | Originally
posted by westi
That's mad Alan.
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vw54
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| posted on November 8th, 2006 at 06:57 AM |
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I would be starting the engine and checking for oil pressure for the first min or so before you give it the revs take the tappet cover off and
make sure the oil is at the tappets then shut down and fit the covers before starting again
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on November 10th, 2006 at 08:18 AM |
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With a new cam and lifters the engine must not be allowed to idle below 2000
for that first 15 to 20 mins. (I do four, 5 minute sessions).
Before ever firing the engine, I have primed the oil system with no spark plugs,
or rockers and pushrods, (so as NOT to wipe off the assembly lube).
Once I have oil pressure on the guage due to cranking, I lube up all the pushrods and rockers, and valves and stems (...everything!).
Then fire it up.
I then vary the revs between 2000 and 2500 for a five minute session,
(never allowing the engine to drop below 2000),
all the while, keeping the eagle eye on guages and engine for signs and information.
If you are not happy or worried, don't be afraid to shut it down and have a look.
Even if you inspect the engine and rockers after each 5 min session.
This may sound like over kill, but when you step up to the big springs and ratio rockers,
they need all the help they can get.
Plus you don't need to waste the money you have in those good parts!
[ Edited on 9-11-2006 by dangerous ]
| Quote: | Originally
posted by westi
That's mad Alan.
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lugnuts
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| posted on November 11th, 2006 at 05:57 AM |
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Thats why i bought ceramic lifters so i wouldnt hafta do the break in.:kiss
Dont listen to what they say,just watch what they do.Oh yeah ive NEVER finished anything ive started.:o
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2443TT
A.k.a.: Ian
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| posted on November 11th, 2006 at 08:56 AM |
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Well thanks for the feedback guys. The engine is still being bult at the moment. Cutting barrels to length today and with any luck fitting the heads
too. Cheers, Ian
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on November 11th, 2006 at 08:58 AM |
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| Quote: | Originally
posted by lugnuts
Thats why i bought ceramic lifters so i wouldnt hafta do the break in.:kiss
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The break-in proceedure is for the cam primarily.
So I would suggest that you still do it.
Unless your cam is ceramic too....
| Quote: | Originally
posted by westi
That's mad Alan.
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lugnuts
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| posted on November 12th, 2006 at 10:51 PM |
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 thanks Dave,will do :thumb
Dont listen to what they say,just watch what they do.Oh yeah ive NEVER finished anything ive started.:o
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Stanley
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| posted on November 13th, 2006 at 08:05 AM |
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Is this a normal break in procedure for all, or more due to using heavy valve springs and ratio rockers. Either way I'll follow it.
I hope to be starting the turbo in the not to distant future this is valuable info. Let us know how it all goes Ian.
Cheers
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