Jdm spec vs US spec
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Jdm spec vs US spec
So in my days I have understood one thing jdm spec is better than US spec but when it comes to engines is there a big difference one time I heard jdm has higher compression but idk! So let me know
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From: Beale AFB, CA
Quick google search. http://en.wikipedia.org/wiki/Honda_F20C_engine Japanese F20C does indeed have a high compression ratio.
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From: Berkshire
Hi guys, just wanted to add my 2p into this, (or 2 cents for you in the states 
).
I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
).I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
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Hi guys, just wanted to add my 2p into this, (or 2 cents for you in the states ).
I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
).I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
I believe you'll find two key differences. Cars for sale in the US have to follow strict emissions standards and our Arizona/California/Nevada gas is of the worst quality in the country to meet California emissions requirements. All cars shipped to north America meet California standards (toughest at the time) and I believe the Euro cars did as well.
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From: Indiana
Originally Posted by Riknos' timestamp='1359626413' post='22304622
Hi guys, just wanted to add my 2p into this, (or 2 cents for you in the states ).
I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
).I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
I believe you'll find two key differences. Cars for sale in the US have to follow strict emissions standards and our Arizona/California/Nevada gas is of the worst quality in the country to meet California emissions requirements. All cars shipped to north America meet California standards (toughest at the time) and I believe the Euro cars did as well.
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to clarify----
RON==Research Octane Number
MON==Motor Octane Number
these are two different methods of calculating the Octane rating of gasoline---(MON will always be a lower number than RON due to the methodology used)
In the US, we add the two together and divide by 2 to get what we just call the "Octane" number of the gas we buy
(RON+MON)/2 ---the calculation is on the side of most of our gas pumps
RON==Research Octane Number
MON==Motor Octane Number
these are two different methods of calculating the Octane rating of gasoline---(MON will always be a lower number than RON due to the methodology used)
In the US, we add the two together and divide by 2 to get what we just call the "Octane" number of the gas we buy
(RON+MON)/2 ---the calculation is on the side of most of our gas pumps
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Originally Posted by rob-2' timestamp='1359649526' post='22305172
[quote name='Riknos' timestamp='1359626413' post='22304622']
Hi guys, just wanted to add my 2p into this, (or 2 cents for you in the states ).
I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
Hi guys, just wanted to add my 2p into this, (or 2 cents for you in the states
).I'm not a mechanic, but you'll find the fact the Japanese 'kept the best spec for themselves' is nothing to do with that, it's all to do with fuel.
Here in the UK, our standard fuel is 95 RON, and our premium is 97-99. The S2000s we get over here are mapped to run on 98.
Now I've never been to Japan, (I have a friend out there now) but I believe their standard fuel is 102 RON, so obviously their cars are mapped to run better fuel, and as such, produce better power.
Out in the US, you guys have lower RON ratings (My Fiancé lives in MA, so I have used it myself) 91 RON for premium means that the JDM spec cars wouldn't be able to run, so that's why Honda had to develop a different tactic for you guys (and produced the 2.2 litre engine).
I believe you'll find two key differences. Cars for sale in the US have to follow strict emissions standards and our Arizona/California/Nevada gas is of the worst quality in the country to meet California emissions requirements. All cars shipped to north America meet California standards (toughest at the time) and I believe the Euro cars did as well.
[/quote]
If you hondata 06+ you get better midrange, but without higher comp it's hard to make more total power out of this motor.
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