View Full Version : What's the best Octane boost?

01-09-2002, 01:28 PM
I could be wrong but I am sure that in chicago the highest octane at the pump is 93. I go to BP/Amaco I think Mobil is the same.

'97 S14 SE Turbo
01-09-2002, 01:34 PM
Highest is 91 octane in the SW, but that doesn't stop me from boosting at 1.0bar on stock internals.

01-09-2002, 02:05 PM
I run BPs 93oct. on my sr20det. And usually during the day I run stock boost and on the weekend if I go out to the races or drifting I usually up the boost to 10-11psi on the 93oct. with no problems.

01-09-2002, 02:11 PM
So then i really dont need to add octane booster to my gas then right? See this all stemmed from someone telling me that i needed to by a 1.1mm+ metal head gasket to run regular pump gas. Otherwise i had to add octane booster to prevent knocking.

'97 S14 SE Turbo
01-09-2002, 02:23 PM
Should I add that this is on a stock internal KA with it's 9.5:1 compression ratio.

So for SR owners, don't worry about it.

<BLOCKQUOTE><font size="1" face="Verdana, Arial[/img]quote:</font><HR>Originally posted by T.Y.:
Highest is 91 octane in the SW, but that doesn't stop me from boosting at 1.0bar on stock internals.<HR></BLOCKQUOTE>

01-09-2002, 04:54 PM
theres a couple places out here in so cal that have 106 octane (small places) well thats what i was told. http://www.freshalloy.com/

01-10-2002, 12:12 AM
I was just wondering what people are using in their sr20det engines in terms of gasoline (octane #?) and if so what kind of octane boost? I have the stock sr20det in mine with a walbro 255 hi-flo pump and i was wondering what works best (and cheapest) to avoid detonation and have it run well.

01-10-2002, 12:23 AM
we use sunoco ultra 94 up here in canada

it is 94 octane..not sure if its RON or MON though

ok..its RON+MON /2

[ 01-09-2002: Message edited by: ADAM H ]

01-10-2002, 12:26 AM
Here in chicago the highest octane at the pump is 92. i dont know if that is sufficient enough to keep the SR from knocking. i really dont want to risk it though.

import silvia
01-10-2002, 12:53 AM
Y'all can kiss my A$$ here in Tucson the best is 91 octane.

01-10-2002, 12:58 AM
cheapest is to buy some methanol and mix it to a 10% ratio MAX...

or buy some race fuel and spike your 92

those "octane boosters" are useless..ie 104+

when they are talking raising octane by 4 points...they are talking 92.4...not to 96

a good fuel is VP motorsports 103.. with 103 ron/mon...good to spike stuff with...plus it is unleaded...