NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 07, 2008 07:20 PM
Compression question......
Okay, I have the full factory manual.........., and I know what the warm engine compression psi should be.........
But I have a cold motor, on a stand, and want to check the compression........., I know the reading will be higher, but what am i looking for , stock internal motor........
Just want to make sure all is good inside before I split the cases and swap trannies...........
Thanks.........., I would assume somewhere around 250psi or more per hole........., like 230 is for a warm motor.........,
____________
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Two Wheel Werkz
Novice Class
Posts: 34
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posted March 07, 2008 09:26 PM
the main thing would be as long as all cylinders check the same or close to
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entropy
Moderator
Posts: 8671
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posted March 08, 2008 12:01 AM
 Edited By: entropy on 8 Mar 2008 04:23
Nox,
i would be real surprised to see 250psi on a stock motor. I see that at about 14.5:1.
Something nearer to 200-210?
like 2WW says, look for consistent readings, and remember to open the throttle all the way as you are cranking the motor.
as we tapped, a leakdown will give much more useful info
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 08, 2008 05:50 AM
Leakdown test shows good...........
Just wanting to check all my bases........, other than being dirty on the outside, this motor looks to be in great shape, will check valves after breakfast with my daughter.......
No need to open the throttles........., motor is on a KnL stand......
Thanks guys.......
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 08, 2008 10:01 AM
Valves all within spec, one exhaust is .0002 to .00004 out of spec......., nothing to worry about.........., time to put the valve cover back on, and take the tranny out.......
Basket, and clutch components in good shape, does not look to be abused......
Lubricity, ( it did not have a billet basket, you got lucky.....lol)
I hope the bottom end looks as good as the rest........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 08, 2008 11:30 AM
All seems good, bearings look to be in great shape, all is tight......., tranny is in excellent condition....., it will look good on my shelf........, time for Blue Moon and Turkey sandwich break........
Now, if it will run like my old stock motor.......
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 10, 2008 05:06 AM
It lives............, has good oil pressure
Purrs in the garage, lets hope it knows how to growl come Sat testing.........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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zx12mark
Pro
Posts: 1654
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posted March 10, 2008 08:24 PM
nox--- how many miles on that engine. how did you check your main bearings-plasti gage
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entropy
Moderator
Posts: 8671
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posted March 11, 2008 02:24 AM
OEM 228psi = 12.2:1 (from manual)
i knew i had that # somewhere
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This moderator uses moderation in moderation
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted March 11, 2008 05:13 AM
Yeah, I had it too........
But when you check it cold, it measures higher.........., we mainly just wanted to see how sound it was before I started pounding the heck out of it.........
Pretty hard to destroy one of these in stock trim.........
____________
42 Wins
21 Runner-ups
2010 TMRC Super Street Points Champion
2010 PMRA Super Street #3 Points
2009 PMRA Super Street Points Runner-Up
6 Time Centerville Dragway Points Champion
Sponsored by:
Scorpion Helmets
Galfer Braking
AMSOIL
Steve's Speed Shop
Kawasaki Sports Center
Mickey Thompson Tires
Catalyst Racing Composites
Conway Cycle
Syed Leathers
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