if we have 98 octane and 100 octane at the pump what would you guys recommend?

i've searched but the problem is most of you guys run 93 at the pump?

currently 00itr with I/H/E and toda clutch combo

getting toda timing belt and power FC(cause no one reliable uses hondata here) and buddy club flat values, mugen head gasket to raise CR by 0.4

so do i get toda A's or B's with toda cam gears, springs and retainers.
or buddy club 3's or 4's with cam gears and retainers?

also getting custom made EFI ITB's to help the smoothing of the idle as well as throttle response what size would get guys reconmend? 50mm? and also what size injectors and fuel pump?

it's a daily driver with the occasional track day.
i luv the pull vtec has, but for racing purposely i would prefer a smooth power and torque curve, and prefer a wide power band over higher peak numbers

would be happy to get 130-140kw at the wheel
stock itr's are about 92kw here
last time i dyno was 108kw with intake, exhaust and vafc2 tuning

thanks in advance for your input

 

oh i forgot im going to port and polish as well

 

I would say run the 98 if thats the lowest at the pump.

If you prefer a smooth power curve with good torque, I bet you will like the buddy club spec 3. thats what they are known for.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITSUKA &raquo;</TD></TR><TR><TD CLASS="quote">if we have 98 octane and 100 octane at the pump what would you guys recommend?

i've searched but the problem is most of you guys run 93 at the pump?
</TD></TR></TABLE>

Are the Octane ratings between the US and Australia even comparable?????????
The reason we run 93 octane is because it's the highest rating available at most pumps (sorry CA). Trust me, if there was a horse pissing 100 octane at the pump we'd all be running for it!

 

i totally see you point! but i just assumed that octane rating is universal, i mean japan uses over 100 octane

we have here

92 octane
95-96 octane
98 octane
and now at some selected stations only 100 octane

anyhow regardless of that, would you guys still find any problems running toda b's or BC 4's on that set up? or would i not be getting the most out of the cams because of my CR being below 12

thx again!

 

i would prefer the more aggressive cam, but just wondering if my setup is rite!

thx again!

 

This is a little explanation on octane ratings:

Measurement methods

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.

There is another type of octane rating, called Motor Octane Number (MON), which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.

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.


With all that said and done I believe your 98 octane is comparable to the USA 93! After looking over your setup I recommend the highest Octane gas available. Detonation is your worst enemy so take every step possible to eliminate knock. Good luck!!!!!

 

wow

thx heaps for da info!

greatly appriciate it!

so 4 the last qns

toda b's or BC 4's?

 

I don't know how the todas are (haven't seen any graphs of them) but I do know that the Buddy Clubs almost always beat the competition for area under the curve. I'm sure with tuning most cams will produce a smooth curve.

 

thx

i'll keep that in mind i think the BC would be cheaper too

thx again