Re: importance of WOT during compression test?
Posted by cdaiscool on Dec 10, 2012; 4:08pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/importance-of-WOT-during-compression-test-tp4033339p4033364.html
WOT allows the air to be pulled in. If you don't have the throttle to open it, it can't suck in the air to pressurize to give you readings. It'll pull in some, sure, but not NEARLY as much as it (theoretically) could.
As for warm vs cold, the rings will be slightly contracted, causing leaks around it. When warm, this is a better way to be sure your rings are sealing properly. However, it won't cause a huge drop, maybe 20 psi, for cold vs warm. And you can put just a little oil in 'em and retest to see if it changes at all. No change means the rings are sealing beautifully.
Careful how much oil you put in though - too much, and you're changing the size of the chamber and it will go up due to less space; oil doesn't compress.
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/importance-of-WOT-during-compression-test-tp4033339p4033364.html
WOT allows the air to be pulled in. If you don't have the throttle to open it, it can't suck in the air to pressurize to give you readings. It'll pull in some, sure, but not NEARLY as much as it (theoretically) could.
As for warm vs cold, the rings will be slightly contracted, causing leaks around it. When warm, this is a better way to be sure your rings are sealing properly. However, it won't cause a huge drop, maybe 20 psi, for cold vs warm. And you can put just a little oil in 'em and retest to see if it changes at all. No change means the rings are sealing beautifully.
Careful how much oil you put in though - too much, and you're changing the size of the chamber and it will go up due to less space; oil doesn't compress.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
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