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EarlyBay Forums
Technical
Compression Readings and Oil Pressure For New Engine
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<blockquote data-quote="mike.s" data-source="post: 603766" data-attributes="member: 13548"><p>Ok, so just wanted to double check this i`ve built a new 1915 engine - run it up, etc. I caclualted all the deck height and head ccs so i`d end up with about 8.6:1 ish compression ratio.</p><p></p><p>In order of checking with all plugs out, engine cold and wide open throttle, i got - </p><p></p><p>1 - 170psi</p><p>2 - 170psi</p><p>3 - 160psi</p><p>4 - 155 psi</p><p></p><p>How does that sound is that too much (!) or looking ok?</p><p></p><p>Also, my the oil pressure when i started it up was about 2 bar at idle with the engine cold - i wired the pressure gauge to the wrong terminal on the sender when i ran it in for the 20 mins initially so don`t have hot readings (doh!), although the oil light didn`t come on at idle when hot so guess thats ok!</p><p></p><p>Does that sound about right aswell?</p><p></p><p>Cheers, MIke</p></blockquote><p></p>
[QUOTE="mike.s, post: 603766, member: 13548"] Ok, so just wanted to double check this i`ve built a new 1915 engine - run it up, etc. I caclualted all the deck height and head ccs so i`d end up with about 8.6:1 ish compression ratio. In order of checking with all plugs out, engine cold and wide open throttle, i got - 1 - 170psi 2 - 170psi 3 - 160psi 4 - 155 psi How does that sound is that too much (!) or looking ok? Also, my the oil pressure when i started it up was about 2 bar at idle with the engine cold - i wired the pressure gauge to the wrong terminal on the sender when i ran it in for the 20 mins initially so don`t have hot readings (doh!), although the oil light didn`t come on at idle when hot so guess thats ok! Does that sound about right aswell? Cheers, MIke [/QUOTE]
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Compression Readings and Oil Pressure For New Engine
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