I searched for an age and couldnt find the answer...am i right in saying that its 195bhp????? The reason i ask is that it has always been assumed (by me at least ) that US ITRs were at a disadvantage due to tighter and more strict emission regulations governing new cars whereas UK ITRs didnt have quite so strict regulations. But if my figure of 195bhp is right then it would seem that US ITRs are in a higher state of tune than their UK counterparts as UK ITRs are quoted by honda as being 187bhp and considering that US ITRs have 10:6 CR compared to the UKs 11:1 CR, it would be natural to assume they have been tweeked more to draw out more power from lesser compression and also the lesser rated fuel. UK ITRs are primarily designed to run on super unleaded (98octane) Arent US ITRs set up for 95 (possibly less) or are there differences in how fuel is rated bewteen the UK and the US and possibly also in how dyno's are configured between the two countries. Maybe i'm talking rubbish...tell me if i am...

 

USDM is 196 BHP.
do the math, (what I did) I and got 16% loss is 164 at the wheels.
But I also looked at the broshure and it said 195 HP.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenracer &raquo;</TD></TR><TR><TD CLASS="quote">I searched for an age and couldnt find the answer...am i right in saying that its 195bhp????? The reason i ask is that it has always been assumed (by me at least ) that US ITRs were at a disadvantage due to tighter and more strict emission regulations governing new cars whereas UK ITRs didnt have quite so strict regulations. But if my figure of 195bhp is right then it would seem that US ITRs are in a higher state of tune than their UK counterparts as UK ITRs are quoted by honda as being 187bhp and considering that US ITRs have 10:6 CR compared to the UKs 11:1 CR, it would be natural to assume they have been tweeked more to draw out more power from lesser compression and also the lesser rated fuel. UK ITRs are primarily designed to run on super unleaded (98octane) Arent US ITRs set up for 95 (possibly less) or are there differences in how fuel is rated bewteen the UK and the US and possibly also in how dyno's are configured between the two countries. Maybe i'm talking rubbish...tell me if i am...</TD></TR></TABLE>

I believe the european emissions regulations must have been more strict, resulting in the EDM ITR header design which counteracts the advantage of higher compression ratio and results in a lower bhp rating. I always had 197bhp in my head for some reason, I somehow remember this number from 1996 when the ITR was announced for the NA market and I *dreamed* of having this car... But every brochure seems to indicate 195 ... chalk it up to phantom memories...

As for gasoline, I believe the 98 octane your are referring to is RON (Research Octane Number), which probably is the standard over in Europe. And in NA, "MRON" (aka PON, pump octane number) is used which is the average of MON (Motor Octane Number) and RON. The difference between MON and RON are that MON rating is tested at higher tempurature and higher rpm, yielding a lower number. The spread between them being known as sensitivity.

That being said, the average gas station over here serves up 91 "MRON" as premium grade, so that is equivalent to 95RON approximately (which you were right about ) Though I personally have the luxury to use 94 "MRON" (98 RON) up here in the north

In Japan they have 100RON on tap and an even better header design (98Spec)...

 

SAE HP (US) is not the same as ECE HP (Europe) and is also not the same as JIS PS (Japan). In US they measure the power differently, like not taking P/S and alternator with it. Also different temp., air pressure etc.
In reality the Euro ITR has a bit more power than the USDM ITR. Not much more because of the shitty Euro header. A B18C6 with JDM header and cat should be the same as an JDM B18C-R.

BHP is also not exactly the same as HP or PS.
187 BHP = 190 HP ECE in Europe mainland.

US Octane = (RON + MON) / 2.
98 RON ~ 94 US Octane

 

You're not correct on SAE HP ratings for the US. What you stated was corrected back in the 60's and early 70's when MFG's would run motors without alternators, smog pumps, power steering pumps, etc. to get their HP figures, but now US horsepower ratings include all accessories and emissions equipment in their results. Their was/is an accompanying change in terminology for the calculations as well. The old method is referred to as SAE Gross and is typically overinflated by ~20% over today's hp values vs the new method called SAE Net.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 &raquo;</TD></TR><TR><TD CLASS="quote">SAE HP (US) is not the same as ECE HP (Europe) and is also not the same as JIS PS (Japan). In US they measure the power differently, like not taking P/S and alternator with it. Also different temp., air pressure etc.
In reality the Euro ITR has a bit more power than the USDM ITR. Not much more because of the shitty Euro header. A B18C6 with JDM header and cat should be the same as an JDM B18C-R.

BHP is also not exactly the same as HP or PS.
187 BHP = 190 HP ECE in Europe mainland.

US Octane = (RON + MON) / 2.
98 RON ~ 94 US Octane

</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by typer_801 &raquo;</TD></TR><TR><TD CLASS="quote">You're not correct on SAE HP ratings for the US. What you stated was corrected back in the 60's and early 70's when MFG's would run motors without alternators, smog pumps, power steering pumps, etc. to get their HP figures, but now US horsepower ratings include all accessories and emissions equipment in their results. Their was/is an accompanying change in terminology for the calculations as well. The old method is referred to as SAE Gross and is typically overinflated by ~20% over today's hp values vs the new method called SAE Net.

</TD></TR></TABLE>
OK, but there are some differences between all these HP ratings: http://www.superflow.com/suppo....html