| intocarss |
10-04-2012 11:27 PM |
Quote:
Originally Posted by GregWeld
(Post 439507)
Complete nonsense.... fire it off and bring it up to to speed... double check the timing and set as required... If there's something not right - you'll hear it in how the motor is performing. And if there's something wrong with it - not hearing it isn't going to fix what's "wrong". It's a do over if you start hearing stuff.
Don't just set it at 2000 rpms though - vary the rpms - your neighbors are going to love you!
Go into any dyno room - you'll see the operators wearing headgear... and they're noisy as hell - you can still hear a lifter ticking if ones gone bad and you can hear the off note.
:cheers:
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Quote:
Originally Posted by GregWeld
(Post 439536)
Yeah --- I'll bet I've been to 30 "run in's" and more than that - dyno runs... chassis and motors... and it's always been the same -- do your absolute best to set timing etc BEFORE fire up -- fire 'em off -- check the timing and start wingin' 'em to the moon.... The rings these days are lapped in by the time they've got all the pistons installed.... the bearings are all coated with break in lube... you've got break in oil with the right zinc and blah blah... So it's really just the cam/lifter that needs to seat... and that gets lubed by splash - thus the RPM's...
BTW -- this is ANOTHER reason we all love ROLLER CAMS!
The last two motors I've done --- the LS2 in Ricks '55 and the blown stroker in Rudy's were both fire 'em up and they idle... and you've got all the time in the world to check stuff out without the raucous rpms. With the LS"x" motors --- there isn't even anything to check out!! OMG - just twist the key and drive away! :D
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O'L GW IS 110% CORRECT on both posts,, we never wore head gear in our dyno room though, our dyno ran through mufflers and we could hear if something is a miss. I/we first pre oil it then would fire eng, look for leaks, set and check timing, adj carb if needed..... break in cam (if not a roller) Then let her rip
I like to vary my RPM's when breaking in a cam between 1800 -2300 for about 20-25 mins and remember to check your valve lash before and after the break in. Good luck, have fun and have Rev take some video please
Quote:
Originally Posted by Vegas69
(Post 439550)
They have these things nowadays called telephones. :unibrow:
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I agree with you... but all anyone wants to do now a days is text :rolleyes: |
