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Cm
MMT Member
Joined: Thu Mar 11, 2010 10:24 am
Posts: 13
Location: south louisiana
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 compression i have a gtr 35 im running 145 150 in one cylinder and 130 in the other. jus wondering if that is good numbers for a stock motor?
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| Sun Apr 11, 2010 7:07 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression Yeah....thats about right.
How many hours on the engine?
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Sun Apr 11, 2010 7:13 pm |
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Cm
MMT Member
Joined: Thu Mar 11, 2010 10:24 am
Posts: 13
Location: south louisiana
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Re: compression 689
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| Sun Apr 11, 2010 7:19 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression Considering that those are great numbers! LOL
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Sun Apr 11, 2010 7:22 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression Have a good valve job done and they (comp. numbers) should come up a little.
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Sun Apr 11, 2010 7:24 pm |
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quackconsumer
MMT Elite Member
Joined: Wed Jan 14, 2009 7:54 pm
Posts: 5582
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Re: compression
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| Sun Apr 11, 2010 7:25 pm |
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Tenpoint
MMT 1000 Club
Joined: Thu Aug 27, 2009 5:22 pm
Posts: 2029
Location: Patterson LA
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Re: compression Should they be within about 10 pounds of each other like with outboards, or is that not really a big deal?
_________________
19x48 Rink/Aucoin Bateau w/35 GTR
20x60 Home-made skiff w/200 Merc
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| Sun Apr 11, 2010 7:29 pm |
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Cm
MMT Member
Joined: Thu Mar 11, 2010 10:24 am
Posts: 13
Location: south louisiana
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Re: compression Jus reset my valves bout 2 months ago. The gauge I used was kinda old it could of been a little off too.
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| Sun Apr 11, 2010 7:38 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: compression I think its a 10% tolerance not 10lbs, but not sure
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| Sun Apr 11, 2010 7:39 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Sun Apr 11, 2010 7:41 pm |
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Cm
MMT Member
Joined: Thu Mar 11, 2010 10:24 am
Posts: 13
Location: south louisiana
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Re: compression Wut should the compression be on a new stock motor? And is the compression that I have now good considering they r more than 10% defferent and I have 689 hours on my motor
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| Sun Apr 11, 2010 8:09 pm |
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craig
MMT Elite Member
Joined: Tue Jan 13, 2009 7:53 pm
Posts: 7515
Location: Chauvin
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Re: compression 130-150 is pretty much the norm for stock engines.
_________________
1750 GatorTail Extreme/Stage 3 37 GTR HD
Procrastination is a lot like masturbation. Sure it sounds great at the time but, in the end your only f--k--g yourself.
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| Sun Apr 11, 2010 8:11 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: compression
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| Sun Apr 11, 2010 9:35 pm |
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Cm
MMT Member
Joined: Thu Mar 11, 2010 10:24 am
Posts: 13
Location: south louisiana
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Re: compression Thanks for da info guys. I figure I'll run the motor stock till it craps out then head work an carb. time.
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| Mon Apr 12, 2010 5:26 am |
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