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06-26-2017, 11:21 AM
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#1 |
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Not Yet Wild
Join Date: Jun 2017
Location: Urbana, IA
Posts: 64
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90psi Compression Enough?
I checked compression on my new cart last week. One cylinder showed about 155psi, and the other only about 90 or 95psi. I thought 155pis seemed pretty high, but is there such thing as "too much compression". On the other hand, I thought 95psi was too low. I'm thinking closer to 120psi is what I want. Am I close?
I'll dig into it and check the valve seats on the bad cylinder one of these nights. Any other suggestions out there? |
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06-26-2017, 12:04 PM
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#2 |
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Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: 90psi Compression Enough?
155 isn't and issue 90 is on the other hand have you set valve lash?
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06-26-2017, 12:50 PM
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#3 |
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Not Yet Wild
Join Date: Jun 2017
Location: Urbana, IA
Posts: 64
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Re: 90psi Compression Enough?
I have set valve lash, can't remember if it was before or after checking compression. I'm thinking it was after, so I better recheck compression first. When I did the valves I couldn't get my feeler gauge in a single one of them, so I wouldn't be surprised if fixing that didn't fix my compression.
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06-26-2017, 01:09 PM
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#4 |
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Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: 90psi Compression Enough?
That could be when they are tight valves won't seal properly
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06-26-2017, 02:21 PM
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#5 |
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Not Yet Wild
Join Date: Jun 2017
Location: Urbana, IA
Posts: 64
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Re: 90psi Compression Enough?
Ok I'll put the gauge on the motor tonight and report back. Thanks for the help Spicy
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06-26-2017, 06:45 PM
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#6 |
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Gone Wild
Join Date: Jul 2014
Posts: 349
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Re: 90psi Compression Enough?
Setting the valves is easy and free. Bad compression once you get them set correctly will be a little more costly.
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06-27-2017, 07:13 AM
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#7 |
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Not Yet Wild
Join Date: Jun 2017
Location: Urbana, IA
Posts: 64
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Re: 90psi Compression Enough?
I've got 160+ in each cylinder. I must have checked it before setting valve lash. Thanks for the help fellas!
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06-27-2017, 08:18 AM
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#8 |
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Not Yet Wild
Join Date: Jun 2017
Location: panama city beach florida
Posts: 54
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Re: 90psi Compression Enough?
there is never too much compression however if you get around the 260 psi range it makes turning a motor over a little complicated and if you get higher than that they don't like regular gas
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06-27-2017, 08:35 AM
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#9 | |
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Not Yet Wild
Join Date: Jun 2017
Location: Urbana, IA
Posts: 64
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Re: 90psi Compression Enough?
Quote:
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