Jump to content
SAU Community

Recommended Posts

Plan on taking our extensively enhanced GTR R34 to Tassie for a short trip. As there is no 98 octane fuel available there it has been suggested to lower my boost to say .8 bar ( currently it is configured through an Apexi AVC-R boost controller at 1.2 bar) and use a good octane booster with premium fuel (95 octane) which is available over there.

Any one had any experience or comments re the suggestion ? I'm presuming these octane boosters work.

Of course being a retiree the beast probably won't even get to its boost parameters (chuckle). What am I saying! I lie.

post-25792-1136464128.jpgpost-25792-1136464009.jpg

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/
Share on other sites

octane boost is good, only use it if you have to... e.g. when your using 95 or when ur gonna race someone :D

i've used it before and yes i feel the extra boost not much but it works magic :) cheers hope that helps

also the come in different brand but the all work the same u wont notice the difference in brand unless u put it on a dyno and you wouldn't wanna waste ur time seeing which one is better they all do the job. :)

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1839782
Share on other sites

Be careful using octane booster! I, personally will never use it again!

Recently I had to use octane booster due to the lack of 98 ron fuel. Not long after using it my car developed a 'miss' during idling and acceleration.

After taking the car to my mechanic, the spark plugs were removed and had to be replaced. As soon as my mechanic saw the condition of the spark plugs he knew that I had been using octane booster and hadn't told him.

Rarely do I drive the car hard as I value my licence and my car too much! Not sure how common this kind of thing is, but just thought I would let you know of my experience with octane booster and why I will never use it again!

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1840016
Share on other sites

I'm pretty sure octane booster only adds 1/10th of a RON...so you can go from 95 to 95.1 if you add a bottle....not good enough.....

Also AFAIK there is only 95 octane at one place in Hobart and that won't get you around the whole state.

At targa we run 98 octane, nothing special, but we have to get it trucked around the state it drums.

I reckon the best thing to do is turn the boost as low as you can, and retard the timing a few degrees, I'm sure Ali can give you a hand.

Maybe post up in the Tassie section and see how thsoe guys are doing it? Its a great place for a driving holiday, enjoy!

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1840031
Share on other sites

It says on that pretty spec sheet that it's running a Powerplay-tuned ECU.

Best bet is to call Alistair and ask him what fuel he tuned it to... Hopefully he tuned it on 95 for safety, but if he tuned it to 98, just turn the boost down a bit like you planned, and she should be fine. If you're REALLY worried, get the timing retarded a bit.

Forget those octane boosters. They don't work and just foul your plugs.

edit: Damn you Dundan, stop copying me :D

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1840283
Share on other sites

Hmm.. wasn't aware of the fact that tasmania is so removed from the rest of australia and doesn't have 98RON.. was thinking about doing a road tour down there..

What do all the Tassie people do for fuel?

I'd check what they say in their little forum area. Good luck - let us know..

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1840296
Share on other sites

After taking the car to my mechanic, the spark plugs were removed and had to be replaced. As soon as my mechanic saw the condition of the spark plugs he knew that I had been using octane booster and hadn't told him.

maybe you need to run hotter plugs.

octane boost will give a brown layer of crap over your spark plug tip. it will eventually need to be replaced but it wont immediately effect a decent set of spark plugs.

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1842011
Share on other sites

As Duncan said above, octane boosters only raise the octane level of fuel one or two tenths of a point (0.1 to 0.2) at best. They are a waste of money and would be better sending the $20 or $30 on regular fuel instead, whilst running less boost and not loading the engine too much. Retarding the timing is the best insurance against detonation.

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1842501
Share on other sites

what a lovely looking car. not bad for an old retiree. much better choice than a tinny and a caravan. hehe. very nice taste indeed!

duncan, andrew and nxtime have the right idea. octance booster can cause more trouble than it's worth. start with a full to the brim tank (of 98ron) before you hop on the ferry then try and fill up when you still have half a tank left. that should effectively give you a full tank of 96.5 octane (plus you have been able to use half a tank of 98 in the meantime). do the same again at half tank and you get a tank of near enough to 96 octane. after that, you are down to pretty much straight 95. which should be fine on your low boost setting. just keep a little eye on your MFD for anything abnormal, and have fun.

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1847794
Share on other sites

maybe you need to run hotter plugs.

octane boost will give a brown layer of crap over your spark plug tip. it will eventually need to be replaced but it wont immediately effect a decent set of spark plugs.

I had NGK spark plugs in it, almost certain they were NGK iridium spark plugs, aren't they supposed to be good?! Are there better plugs?

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1849704
Share on other sites

Guest Mashrock
eh? Tassie has the best driving roads in Aus.

And I'm sure that with standard boost and a few degrees timing retarded you will still be able to get to the speed limit ok......

they have speed limits in tasmania?

p.s. say hi to uncle chop chop for me

Edited by Mashrock
Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1850647
Share on other sites

From the BP web site..............

2. How can I boost my octane?

The octane of a fuel can be boosted by adding proportions of a higher octane fuel. Also available is toluene, which can be used as an octane booster in both unleaded and leaded fuels. Generally each 5% addition of toluene will increase the fuel's octane rating by one number. It is not recommended to add more than 30% of toluene to the fuel. Because of the dangers with incorrect mixing, individual motorist are advised against mixing additives with fuels without first consulting their car engine manual or their fuel supplier.

So check with the Tassie guys where you can get toluene.

:P cheers :D

Link to comment
https://www.sau.com.au/forums/topic/100810-octane-booster/#findComment-1853026
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The fab work can be as simple as a couple of silicon hoses and clamps to the factory piping. 
    • Just sounds like either way you need to do some fab work to get everything to fit, so why limit yourself at that point? If the GCG high flow option is zero effort in and out swap though I'd probably do that. It's almost certainly lowest risk, lowest cost, etc. The HKS GTIII-RS option that Kapr mentioned is laughably expensive for what it is, they charge the exact same for two turbos on the RB26 so their margins are off the charts on that thing.
    • Intake manifold is not a part of the issue. The turbo bolts to the exhaust manifold. That is easy. But close your eyes and picture the physical situation. That is a T3 flange on the manifold and a T3 flange on the turbo. As long as any new turbo has a T3 flange on the exhaust housing, that exhaust housing will bolt to the exhaust manifold. This places the exhaust housing in the same place as the stock one. But now move your mental attention a little further forward. The location of the compressor housing is set by the length of the turbo's core. The stock turbo had a long core. Let's say that it is..... 100mm long. So that would place the compressor housing 100mm forward of the exhaust housing. But a highflow, might well have a centre core that is shorter. Let's say that it is only 70mm long. Now the compressor housing will be 30mm further back in the engine bay than the stock one. This DOES move the turbo's compressor outlet backwards. It also moves the compressor's inlet backwards. You will very likely have to do some work to both the inlet and outlet piping to make everything connect again. I am not say this to make it out to be a bigger deal than it is. I am just pointing out that "bolt on" is sometimes not quite bolt on. The highflow from GCG that Murray linked above (https://gcg.com.au/turbo-charger-upgrade-skyline-gtst-2iu-xtrgts-s1.html ) uses a core that is the same length as the stock core, and so does not require this extra work. It will look very much like the stock turbo. No-one uses GTR turbos of any flavour (stock, or aftermarket) in a single turbo application on RB20/25. It's not a thing. Yes, people have been putting on GT3076, GTX3076 (and bigger and smaller versions of those) and G30s (of various sizes) onto RB20/25 since forever. But these are not "bolt on". Everything except the 4 bolts to the exhaust manifold change with these. And genuine Garretts are expensive. Non-gen, like Pulsar, etc, are cheaper, variously as good or nearly as good. But still not bolt on. No-one in the right mind would pay for an HKS turbo. Not in this modern day and age. Well, yes, the GCG highflow. You could ask HG what he can do to make the compressor housing sit in the original location. There are surely others doing highflows around the world. And some of the eBay/Temu ones (as reported by Dose) work and don't die. Bit of a lottery though. I would send your turbo to GCG (here in Oz) to be highflowed if you want a trivial no-extra-work option. But seriously, the work required to change inlet and outlet piping is not that hard. That's a boost control problem, not a turbo problem.
    • Thank you all for the replys 🙂 I know that intake would be different but that is one pipe at it is not that hard to get(custom one). I meant mainly bolt to the stock manifold and the turbo elbow. I looked and many sites/forums but they are just "old" with some old HKS turbos from GT-R i guess? What about some Garrets?  Or any other turbo? Is there even a turbo which i can just bolt on? 😄 And yeah i know about that new HKS but that is like 2000k USD without taxes/shipping in here   Iam getting a touch up tune but my "problem" is that on the "not" hot day iam getting peaks around 0,9 bar...and when it was around 15 Celsious i saw peak around 1 bar which is just too much for stock turbo. And of course turbo is old and i like to get some new one for a piece of mind 🙂 
    • I'm working on the assumption that our friend Jasmine here is a Russian (or, possibly Ukrainian) spammer/spambot, based purely on the number of such that I have been having to neuter in the last few weeks. IP address for the OP above was in WA. But that could have been via VPN. Posting at quarter to 4 in the morning is a good sign of being from somewhere in Europe. The last Jasmine that I kicked in the cooch was IP addressed in Ukraine. Even that could have been via VPN, and the bitchbot could have been from Russia, Serbia, China or anywhere. Regardless, was a spambot, so I killed it with fire. The fact that our new friend Jasmine here did not respond in any way to my tart query strongly suggests to me that this OP was just the establishment phase of a user able to be activated for spamming in a week, or 3 or 10.
×
×
  • Create New...