I now it’s a newbe question but how to a translate from a ratio to actual psi...

Btw what’s the highest compression you have seen in a beta…

Tanks…

 

I see a lot of views and not a lot of answers to an easy question so before someone comes on here and flames out on you I'm going to say, since this is not really a Tib specific question you should really do some outside research (Wikipedia, google search...).

Short and simple answer: By the way you worded your question you need to learn some basic terms and concepts before you go and start to relate it to your own car. I'm guessing you are referring to the amount you boost your car (i.e. how much psi are you pressurizing your air to. And as for compression ratio maybe you should read up on it before you try to max your compression ratio out. If you boost you'll wnat to lower it, if you are N/A you'll want to raise it slightly without causing knock.

Do a quick search on Howstuffworks.com that place is a goldmine of information.

 

^^^


no its not like that i understrand all about high compresion and low what a whant to now is how the ratio works... because my stok engine gave 210 psi of compresion por cilinder and i what to know what compresion ratio that wold be... and my quiestion is base on the fakt that i can rise ir over 250 psi but i whanted to now if some one has don that here...

 

WTF did you just say lol.

i have stock compression, and i ran about 210 per cylinder.. its close to where it should be..


do a search for the conversion. there should be a formula out there that will take in a bunch of different factors to give you what psi is 12:1 CR.

 

^^^


i did befor posting this but i didn't fin enything i dont'n now if i did the search correcly but i didnt fin anything...

 

Compression and compression ratio (CR) is 2 different things.

Compression is the pressure that is made by pistons inside the engine. It may be different through engine life as engine worn out.

CR is a geometrical ratio of volumes (displacement of engine + displacement of combustion chamber)displacement of combustion chamber). This number is constant.

 

I think before anyone is going to take your questions more seriously, you need to learn how to type proper english and then type out some coherent sentences...

Most of what you've said was really hard to read. We have rules here about stuff like that.

 

^^^^^ exactly

Technically there is a way of determining your actual compression ratio from your actual compression but that involves being able to figure out the pressure of the air that enters your combustion chamber (which is not the standard 14.7 psi due to your intake manifold and the runner design, usually around 20ish psi).

 

<div class='quotetop'>QUOTE (Kantizuni @ Feb 13 2007, 02:18 PM) <{POST_SNAPBACK}></div><div class='quotemain'>I think before anyone is going to take your questions more seriously, you need to learn how to type proper english and then type out some coherent sentences...

Most of what you've said was really hard to read. We have rules here about stuff like that.</div>

when i introduced myseft i sed that engish is not my first language and that i was not good in grammar and no one said nohing abaout that...

 

I'm sorry I was trying to quote Dmitry, didn't realize Kantizuni had slipped that comment in. I saw that you're from PR so i figured to give you the benefit of the doubt.