i remember one company did a dyno graph compare... between a 2.3 and a 2.0 both with Full-race manifolds... both with AEM's and he said the same supporting mods...and the 2.3 had MUCH better under the graph with like 23 more ft/tq .... then the 2.0 ... and the 2.0 only had like 6 more whp ... and it wasnt there until the VERY TOP up it's powerband...

 

Even if that were true, the small hp difference is not the advantage a 2.0L has over a 2.3L. When it comes to high speed, high rpm performance, the advantage of a 2.0L is better high rpm efficiency and the ability to rev higher (read: more safely) in 4th gear.

 

2.1L 10:1c/r

 

2.1L 4G64, yes.
10:1 c/r, no.

 

Don't know how much this helps, but my power drops off just before 8.5k on my dyno with the white rabbit. If I can figure out how to get it on here I'll post it for you. I went with a built 2.0 instead of the 2.3. Haven't driven it yet but I hear it's a blast

 

pump gas here is 98 octane Car was tuned without alky at that boost level but im spraying meth anyways

 

10:1 c/r + boost = BOOM

 

But how is that octane rating obtained? Be careful, as I'll bet it isn't the same. 98 pump octane in Europe is less than 98 pump octane in the U.S., and it is different elsewhere as well.

The U.S. pump octane is obtained this way:

Research Octane + Motor Octane / 2.

Taiwan may very well rate it differently (e.g. Research octane only), so do not automatically assume that 98 octane in Taiwan is the same as the 98 octane in the U.S.

From Answers.com:

"In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 91 in Europe."


Chances are your '98 octane' in Taiwan is the equivalent of 93 octane ('pump gas') in the U.S. Be advised!

 

it is true .... well my numbers were off... top end the 2.0 picked up 14awhp .. and the 2.3 picked up 83 more TQ ... with a MUCH mid range... which for majority of all street races... it's all about under the curve...

however i would agree.. it is much safer to rev higher in a 2.0 however.. there are guys out there.. hitting 8.5k rpm on a stroke'd motor with no issues

https://www.evolutionm.net/forums/sh...hlight=2.0+2.3

 

The test in question shows the 2.3L hp taking a nose dive above 7500rpm, which means that the optimum shift point has one shifting into 5th gear around 120mph - and racing in 5th doesn't work very well. Meanwhile, the 2.0L keeps building power past 8000rpm.

But this discussion isn't about street races, it's about highway races.


When they disassemble the motors after 30-40k miles (assuming they go that far - or go that far between rebuilds), then we'll find out if there are issues.

 

good topic,

I've been trying to figure out the same things...2.0L or a 2.3L

 

2.1L slowboy racing.

 

i think of highway being apart of street... i really dont race on the street much... too many dangers.. anyways... look at Chris with his black evo .. most of his races go past 120mph and thus past'd 4th and into 5th and it does AWESOME on highways..

you are right at stock/bolt on power levels 5th is useless... but after 600+whp longer gears are better imo.. ESP .. if ur midrange is still strong... which is why i would push for the 2.3 ...

a 2.0 wouldnt be able to carry as strong in 5th gear due to it's midrange power... yes your probaly right about being able to hold in 4th for longer... what maybe 10 to 15 mph.. but then soon or later in a highway race.. you'll need to go into 5th ... esp if u racing a decent v8 (ie.. Cobra, Stroke'd LS1, or any of the new Vettes)

ps dont get me wrong .. i realize u probaly do know more about cars then i do.. but i'm just putting my 2 cents in from what i've read on this board and a few others..

imo a 2.3 is a much better street/highway and daily car... and 2.0 is a much better drag car

now the 2.1 i know a lot less about.. why is there a big push for 2.1 all of a sudden? the 2.1 are 4g63's with the 4g64 crank? ... how would a longer stroke be good for rev's?

 

So you can rev higher w/ the 2.0 but if you're gonna keep max rev at 8000rpm anyway why not go w/ the 2.3 which has the recommended max rev set at 7500rpm for longevity by shop such as Buschur or AMS.
Go w/ the 2.0 if you're willing to rev to at least 9000 rpm.

 

2.0ltr, built head, Good intake manifold, 35R. rev to the moon.
Honda owners Rev to 9500rpm with a 35R all day long.