Camshaft Balancing

« **on:** December 15, 2008, 05:50:57 PM »

What's next....Pushrod Balancing...w/t/f.

People are always making things more difficult

« **Reply #1 on:** December 15, 2008, 07:11:10 PM »

Some people!

« **Reply #2 on:** December 15, 2008, 07:36:20 PM »

When re-balancing the camshaft, be sure to split the mallory metal's total mass between two pieces placed betwen cam journals 1&2 and 4&5.
Timing chain lightening mods are not completed unless the cam gear and crank gear are also rebalanced 2-to-1 against each other (since the cam gear turns at half the crank gear speed).
Installing seal lip springs from the next size greater seal are a great friction reduction trick. Remember to crazy-glue that larger lip spring into place, or else.
Be sure to pre-torque connecting rod bolts on a "rod simulator spacer sleeve" prior to weight matching all 16 of 'em to each other; otherwise the total mass will be thrown off if only finger-tight (bolt preload affects total mass due to energy stored)
Matching the cc's on your carburetor float bowl volumes is the most overlooked step when fully optimizing air/fuel delivery.
Tapping vaccum gauges perpendicularly into the 4-inch collectors of OT headers will allow precision tuning of exhaust pulses by playing with valve timing events via lash settings (flat tappet and solid lifter only).

;D

LO

« **Reply #3 on:** December 15, 2008, 08:24:27 PM »

Hey LO you is getting to dammn technical

Now put it in laymans terms, or is it you is ful of CACA

« **Reply #4 on:** December 16, 2008, 01:28:34 PM »

Heres some info you folks might enjoy

regarding this issue :

http://www.aera.org/ep/downloads/ep1/EP012008_30-32.pdf

« **Reply #5 on:** December 16, 2008, 07:30:28 PM »

Ok.! Give me a call so that we can get more tech. about this....
Maybe we can teach each other a thing or another.(714) 879-9671

« **Reply #6 on:** December 16, 2008, 07:40:43 PM »

My point is that "customers" don't even want to spend the money
on balancing the rot/recip....In which case . ,I have no choice
but to send them to the local engine butcher shop.
It's all about educating the Customer.

Then again...People make their own mind up.

« **Reply #7 on:** December 16, 2008, 07:51:05 PM »

I find my "customers" very smart and very much on the ball , more so than ever in todays world where an incredible amount of information is readily avaiable "at thier finger tips" I "learn" from my customers regularly Tom

« **Reply #8 on:** December 16, 2008, 07:55:49 PM »

OK I read this and think I get the concept. BUT on a HP/$$ ratio is this really money well spent? As far as I know, not too many engines have ever been lost due to a cam shaking itself apart. I imagine this job is a hundred bucks or more and like the article says, you still have an entire valvetrain assembly that is probably made to less consistent standards than most quality camshafts. I would surely have to have someone like Tom or EngDoc explain why I must have this done.

« **Reply #9 on:** December 16, 2008, 10:15:28 PM »

Honestly ponder this, most jet boat motors we know and love are going to spin around 5k WOT (maybe 6K under some circumstances) ,then consider that what the cam is turning (rpm) not to mention the very small circle of rotating "mass" then ask yourself if it would really make any real sense to give a second thought (or spend $) on balancing a precision made production popular brand camshaft like Comp, Engle, Isky ,Lunatti, Crane etc ,etc

« **Reply #10 on:** December 16, 2008, 10:53:15 PM »

Quote from: 76NORDIC on December 15, 2008, 08:24:27 PM

Hey LO you is getting to dammn technical Now put it in laymans terms, or is it you is ful of CACA

CaCa? Ya think?

LO

« **Reply #11 on:** December 16, 2008, 10:59:12 PM »

Quote from: jet boat performance on December 16, 2008, 01:28:34 PM

Heres some info you folks might enjoy regarding this issue :

http://www.aera.org/ep/downloads/ep1/EP012008_30-32.pdf

Uhh...well...it made for some interesting reading.

Anyone one else here every put a cam on a lathe, on the cam's centers, so as to polish the journals and, during the process, take note of the affect of the cam being out of balance?

And this is without the 5 cam bearings supporting the juornals accross the camshaft.

I could see Formula 1 working with this....

LO

p.s.: I like to look for every IOTA of hp too, so I won't dispute the theory or reasoning but...

« **Reply #12 on:** December 17, 2008, 01:28:05 PM »

Great info. guys...Interesting subject

Also I have never had a cam shake my lathe apart either

« **Reply #13 on:** December 17, 2008, 03:23:21 PM »

Quote from: enginedoctor on December 17, 2008, 01:28:05 PM

Great info. guys...Interesting subject

X2 I like having stuff like this to consider - no matter what the ultimate group-think ends up. Everybody keep posting the fringe stuff!

« **Reply #14 on:** December 17, 2008, 04:01:50 PM »

Why couldn't you just go with a more aggressive cam lobe to increase power instead of balancing? LOL

« **Reply #15 on:** December 18, 2008, 05:45:36 AM »

Because the more aggressive lobe will make the cam even more out of balance

« **Reply #16 on:** December 18, 2008, 12:02:43 PM »

Great question Tahit Girl...But in my opinion,rather than balancing the cam,
consider simply finding the correct engine parts combination to suit your needs
and balance the rot/recip. weights which is definately $ well spent opossed to cam balancing.
Course I am not against this process, but If you max your rpm's at 6,500 or so
I dont see the need for cam balancing... Any ways did you enjoy the fireplace last night
and my hand keeping your transom warm

p/s good answer Crewchief22!

« **Reply #17 on:** December 18, 2008, 12:38:53 PM »

Gotta make fun where you can

If you're considering spending the money to have a cam balanced, I thing you would be ahead by using that money to have someone spend more time doing port work to the cylinder heads!

« **Reply #18 on:** December 18, 2008, 01:39:38 PM »

Crewchief22....Absolutely agree w/you

« **Reply #19 on:** December 19, 2008, 07:03:38 PM »

For my own personal builds up to this point, I think I'd rather spend that "camshaft balancing money" where it is better put to use, such as weight matching my testicles so that my ball sack hangs symmetrically.

LO

« **Reply #20 on:** December 19, 2008, 08:11:45 PM »

Quote from: LakesOnly on December 19, 2008, 07:03:38 PM

For my own personal builds up to this point, I think I'd rather spend that "camshaft balancing money" where it is better put to use, such as weight matching my testicles so that my ball sack hangs symmetrically.

LO Too funny

« **Reply #21 on:** December 23, 2008, 12:26:49 PM »

Interesting thought..never crossed my mind

enginedoctor

Marcsrollin

LakesOnly

76NORDIC

jet boat performance

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jet boat performance

GlassCutter

jet boat performance

LakesOnly

LakesOnly

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Stevecat

Tahiti Girl

crewchief22

enginedoctor

crewchief22

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76NORDIC

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