Jump to content
SAU Community

Recommended Posts

Hey guys

I'm wondering if it's possible to tune a rb26 on 95 octane and still produce decent numbers with out detonation.

At the moment I'm living in the sticks and 95 is all that's available right now. I have developed a real pesky itch to buy another skyline and the fuel issue is the only thing holding me back.

Cheers

Scott

Link to comment
https://www.sau.com.au/forums/topic/404677-running-95ron-with-300kw/
Share on other sites

i reckon it could be done but youll be limited by how much boost you can run

otherwise you will just comprimise tuning for boost which will give you that doughey effect

many people overseas from memory run spazzo power on penis fuel so it can be done

if you were going to try i would do a reasonable timing map - maybe even just a bit of a tune of the stock map and then run a small amount of boost

and slowly increase boost and go from there

intake temp, engine compression and boost will all work against the lower octane so make sure these are managed well

ie dont have a hot pod sucking hot air

many people overseas from memory run spazzo power on penis fuel so it can be done

That's very different, you can't really compare our octane ratings with other countries octane ratings. Not only does altitude affect the fuels performance, but some places like USA and Canada use the Anti-Knock Index instead of RON, so their numbers look different to ours but are in fact the same or better.

Hey wedge_r34gtr

I sold my r33 before I came to Hedland and now that I'm making good money I want to splurge on an insane gtr but the only thing stoping me is the lack of 98ron.

The only places that sell the required fuel that I know of are Capricorn road house near newman and down karratha way which is quite unfortunate.

Thanks for the info guys, I might just go and buy a road bike instead.

Hey wedge_r34gtr

I sold my r33 before I came to Hedland and now that I'm making good money I want to splurge on an insane gtr but the only thing stoping me is the lack of 98ron.

The only places that sell the required fuel that I know of are Capricorn road house near newman and down karratha way which is quite unfortunate.

Thanks for the info guys, I might just go and buy a road bike instead.

As someone said above - water / methanol injection! Would be perfect and would help in the hot climate up there.

I just done some reading up on the aem setup and it sounds good.

Anyone had any experiance with water/methanol injection?

How long would a tank last?

would placing the nozzle infront of the throttle body be better than placing it infront on the turbo housing?

Any info would be very much appreciated.

I just done some reading up on the aem setup and it sounds good.

Anyone had any experiance with water/methanol injection?

How long would a tank last?

would placing the nozzle infront of the throttle body be better than placing it infront on the turbo housing?

Any info would be very much appreciated.

There's a 16 page thread just a few down ...

the piont is, it can be done if you can be bothered, have no other fuel choice and are prepared to spend some time learning about different setups

if you cant be bothered, expect instant results and want to run the same boost and setup as 98 then yeah it wont work, but if you are open to some research and other options then you can do it with comprimises

  • 1 month later...

im also in hedland and had my GT-R tuned for 95.

You do miss out on alot of power but i would not get a GT-R because of the lack of fuel. i know of many performance cars that have also been tuned for 95 and all run fine without a problem.

My 33 will be up for sale soon, if your looking.

Wasn't Mr Mafias original octane drama because he didn't have a local supply of 98 ULP ?

People I know that work there tell me its often very hot and humid and not the best conditions for high performance petrol engines .

Water injection sounds good and is possibly the only practical alternative if you can't get higher octane fuel or E85 .

Dusty dirty hot humid salt air , enemy of machinery . A .

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

    • My thinking is that if the O2 sensor is shot then your entire above described experience is pure placebo.
    • Here is the mess that I made. That filler there was successful in filling dents in that area. But in the middle area. I can feel dents. And I've gone ocer it multiple times with filler. And the filler is no longer there because i accidently sanded it away. I've chased my tail on this job but this is something else lol. So I'm gonna attempt filler one more time and if it doesn't work I'll just high fill primer the door and see where the issues are because guidecoat is of no use atm.
    • Ok, so I think I sort of figured out where I went wrong. So I definitely overthinked it, and I over sanded, which is probably a large part of the problem. to fix it, I ended up tapping some spots that were likely to be high, made them low, filled them in, and I tackled small sections at a time, and it feels a lot better.    I think what confused me as well is you have the bare metal, and some spots darker and some are lighter, and when I run my finger across it, it' would feel like it's a low spot, but I think it's just a transition in different texture from metal to body filler.    When your finger's sliding on the body filler, and crosses over to the bare metal, going back and forth, it feels like it's a low spot. So I kept putting filler there and sanding, but I think it was just a transition in texture, nothing to do with the low or high spot. But the panel's feels a lot better, and I'm just going to end up priming it, and then I'll block it after with guide coat.   Ended up wasting just about all of my filler on this damn door lol  
    • -10 is plenty for running to an oil cooler. When you look at oil feeds, like power steering feeds, they're much smaller, and then just a larger hose size to move volume in less pressure. No need for -12. Even on the race cars, like Duncans, and endurance cars, most of them are all running -10 and everything works perfectly fine, temps are under control, and there's no restrictions.
    • Update: O2 sensor in my downpipe turned out to be faulty when I plugged in to the Haltech software. Was getting a "open circuit" warning. Tons of carbon buildup on it, probably from when I was running rich for a while before getting it corrected. Replaced with new unit and test drove again. The shuffle still happens, albeit far less now. I am not able to replicate it as reliably and it no longer happens at the same RPM levels as before. The only time I was able to hear it was in 5th going uphill and another time in 5th where there was no noticeable incline but applying more throttle first sped it up and then cleared it. Then once in 4th when I slightly lifted the throttle going over a bump but cleared right after. My understanding is that with the O2 sensor out, the ECU relies entirely on the MAP tune and isn't able to make its small adjustments based on the sensors reading. All in all, a big improvement, though not the silver bullet. Will try validating the actuators are set up correctly, and potentially setting up shop time to tune the boost controller on closed loop rather than the open loop it is set to now. Think if it's set up on closed loop to take the O2 reading, that should deal with these last bits. Will try to update again as I go. 
×
×
  • Create New...