k20a octane

[02civicSI]

i just have a quick question because i am undecided between a k20a or k20a2 swap. what octane does the k20a run at? i know it has to be atleast 91 but somebody said 101?

[Brettnyt]

Originally posted by 02civicSI
i just have a quick question because i am undecided between a k20a or k20a2 swap. what octane does the k20a run at? i know it has to be atleast 91 but somebody said 101?

Eh, 101? That seems a lil... uh... crazy? My guess is 91 should be perfect...

[02civicSI]

yea 101 did seem a little high but i want to make sure before i get a k20a. dont wanna be like "s**t...they dont sell that octane at the pump..."

[2k2ep]

Onthe type r motor I think you should run 96-98 minimum. Think about it if our motors run on 9.8 and see gains running 90+ octane whatdo you think you should run with 11:1 compression.

[02civicSI]

the highest octane that california sells at the pump is 91 so that is playing a big role in my decision making process.

[j spek chucks]

all the mags that have done anything with the K20 said that it should run 100 i think that sport compact put it into a rsx about a year ago and it said that there was a difference in 91 and 100.
in texas we have 93

[ep3guy]

You can get your ECU flashed by Hondata and you will be able to run 91 octane here in CA.

[eurosteez]

There was another thread where someone said k20a is good on 93 possibly 91. 98 n 101 octane is the japanese octane rating which is different than ours.
101 jdm octane = 93 octane over here.

I tried to search and find this old thread but no luck:(
*goes and continues search*

[eurosteez]

Originally posted by mullogutherum
I believe the US octane rating system is a little different than yours (I know it's different from the one used on the European continent, but am not positive that the UK follows the EU standard in this area). The number shown at the pump in the US ("road octane") is (R + M)/2, i.e. the average of the Research & Motor octane numbers (RON & MON, respectively). The European system uses RON only, which is a slightly higher number.

Roughly, 87 octane (US) = 91 octane (EU).

What really sucks here is that California is stuck with 91 octane as the best "premium" fuel. Since California is the largest & richest state, the auto manufacturers typically tune their US-spec cars accordingly, to avoid pinging in factory tune.

Ok not what I was looking for but ya get the point. It would be interesting to compare octane ratings from Europe, japan and here.

[civicSIracer]

B16a is at 10.2:1 and runs fine on 89-91 octane. 00ITR ran on 93 octane and had like 12:1 compression. you sould be fine on 93 octane man.

[D16Y8_Turbo]

For the K20A you should be in great shape using premium fuel whether it is 91-94. My EP always has 94 from Sunoco in the tank. Keep in mind the E46 BMW M3 has the highest compression ratio of any production vehicle here in the states with 11.5:1 compression ratio. If the highest they have in Cali is 91 and the M3 uses it, i can't see why the K20A couldn't use it with a tad lower compression. I think you and the K20A will be fine.

[PoRT]

agreed.. im am running 93 with my K20A and it runs great. no detonation at all. i also know people in Cali running 91 on their K20A... no problems there either. naturally, it will run stronger with higher octane, but it will not hurt running 91-93. still runs VERY strong. with better tires and a better launch, i would be at mid to low 13's. easily

[87gn]

the highest octane that california sells at the pump is 91 so that is playing a big role in my decision making process.

ever herd of toulene or xylene?

[k2ep3]

Originally posted by eurosteez
There was another thread where someone said k20a is good on 93 possibly 91. 98 n 101 octane is the japanese octane rating which is different than ours.
101 jdm octane = 93 octane over here.

I tried to search and find this old thread but no luck:(
*goes and continues search*

I don't know how you get this, but it's not true about the octane. Well, Japanese Type R require regular gasoline in Japan, which is 97 octane. So, you can run with 93 octane, and maybe octane booster.

[Rey]

You could use a stronger head gasket to lower the comp a little. There are other ways, but I don't know them. If you can lower the comp to 11.0, then you can run on 91 with ease. You WILL lose about 5-10 hp though.

[eurosteez]

Originally posted by k2ep3
I don't know how you get this, but it's not true about the octane. Well, Japanese Type R require regular gasoline in Japan, which is 97 octane. So, you can run with 93 octane, and maybe octane booster.
dude read my second posts quote.

[k2ep3]

Originally posted by eurosteez
dude read my second posts quote.

yeah, i read that. but, it didn't say anything about
Japanese gas so... you have mentioned japanese
octane, but in the second one, it was US and UK.

[PoRT]

anyone read my post.. i am running this motor with 93 and i know a few people in cali running 91.. it will be fine. no detonation.:D

[sniperSI]

There are plenty of k20a swaps going around and I do not think they are dependant on 100 octance gas, ask port he drives his daily.