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98 Plus Octane Booster

MRHD66

By MRHD66,
in Engines & Forced Induction

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Joshbigt62r Proficient

Joshbigt62r

Posted
Posted

You can get e85 delivered in drums but it's quite expensive isn't it compared to at the pump.? Better off going water methanol + 95-98 octane fuel preferably 98 octane and water/meth as jet_r31 mentioned.

Cheers Josh

XR Pilot Contributor

XR Pilot

Posted
Posted (edited)

I looked into this a fair few years ago before E85 was available - octane booster will generally raise a fuels given octane by a few points. Ie point-something of an octane. So 98 will become 98.2 octane for example. The only way to get a decent boost in octane is to mix something like Toluene with 98 (121RON, turbo F1 cars used an 86% Toluene/14% n-Heptane filler blend. It's pretty nasty to handle but you could get it in drums as of a few years ago). Mixed at 65% 98 / 35% Toluene this will get you up to around the same octane as E85 at a much higher cost vs pump E85.

I think your only viable options are either reduce the compression ratio of that motor to run 98, run water/meth like Darren said (if you do run water/meth I'd listen to this man!), buy E85 drums or take a trip to either Newcastle or Kempsey and fill up a few jerry cans.

Edited by XR Pilot
WMDC35 Experienced

WMDC35

Posted
Posted

Octane booster is also completely unreliable and probably doesn't even add half as much octane rating as claimed. I made some from mothballs and petrol in the 1990s that was probably at least as effective (ie it didn't really do anything).

mythbusters did a test with fuel additives, the moth balls seemed to do pretty well haha

JustinP Mentor

JustinP

Posted
Posted

I definitely would not recommend using 98 + octane booster. Due to some flooding that we had a few years ago, I got stranded in my R34 and was forced to use 91 RON fuel as it was the only option I had to get home. I added octane booster as a safeguard. Still suffered engine failure haha :P Thankfully I can laugh about it now! 3 years and counting and I still have not finished rebuilding it!

I would recommend the water / methanol option. But remember, as you are relying on it for everyday driving you need to make sure the setup is ultra reliable and has the appropriate failsafes.

Super Drager Mentor

Super Drager

Posted
Posted (edited)

I definitely would not recommend using 98 + octane booster. Due to some flooding that we had a few years ago, I got stranded in my R34 and was forced to use 91 RON fuel as it was the only option I had to get home. I added octane booster as a safeguard. Still suffered engine failure haha :P Thankfully I can laugh about it now! 3 years and counting and I still have not finished rebuilding it!

I would recommend the water / methanol option. But remember, as you are relying on it for everyday driving you need to make sure the setup is ultra reliable and has the appropriate failsafes.

Well that sounds wrong, if you weren't on boost and loading the car up it shouldn't matter. Baby the car and you can drive it on 91 octane easily. I've never seen a car so aggressively tuned on the low load part of the map that it detonates on 91 octane.

Edited by Super Drager

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