Jump to content
SAU Community

Recommended Posts

Hi

has anybody looked into remapping the ECU to run on a lower pump gas (maybe to switch hi/low depending on petrol prices!)

SYD is hitting $1.80L for 98 now so its becoming an issue. Also just ho much power would we really lose ?  20kw?  drop the 0-100 by a few hundredth of a second? (do you have any references to the impacts here?)

I looked on the web and read in the USA that the SpecialityZ shop with the Guru Seb tunner (a Guy) does make many maps using Uprev Pro Tuner. On their home page SAS is shown as the NSW dealer (David - He helped with my 200sx mapping years ago)

http://uprev.com/secure/dealers

I might ping him and see if its possible. Might also see if a E98 map could also be added for a bit more than 245 Kw ;)  hehehe

 

Link to comment
https://www.sau.com.au/forums/topic/475105-detune-v36-to-run-on-unleaded-91/
Share on other sites

it's tuned for 95 and can run on 91 but only recommend for short periods. Maybe a tank or 2.

It wont burn as clean and things get dirty over time.

you might lose 5kw. thats a guess

You would need to know exactly why 95 is specified.

In some cases it is due to the requirement for low sulphur fuel (our 91 has a max of 150ppm, 95 or 98 has a max of 50ppm).

Usually it is due to compression ratio, which is why the manual will often state to avoid full throttle if you need to use 91 in an emergency.

You can't 'tune' the compression ratio, you would need to modify the engine to reduce compression which would make the whole process cost prohibitive.

Hi Sonicii

True, cant reduce 11:1 compression on these  (check new QX50 variable compression block that does adjust bottom end cycle - wow)

From what I read on 307Z forum, its just cam timing to reduce valves/charge and retard. See all the maps people are running here

http://www.the370z.com/tuning/34422-what-maps-everyone-uprev-tune-running.html

PS Dave at SAS quoted 1500 to remap with dyno work and petrol swaps inclusive.

You want to spend 1500 bucks to let you use a fuel that's 20c a liter cheaper... in other words you need to buy 7500L of fuel to make it worth while, which means assuming you're getting 10L/100km thats 75000km to make it worth while. Doesn't make sense to me

And you have less power and would actually have slightly worse fuel economy that would mean it'd take even more km to break even.
 

  • Like 4
  • Haha 2

If you can't afford to run it on 98 RON, sell it and buy something more economical.
I run my daily on 98 (turbo Subaru), times are tough but if you want to drive something that run on 98, too bad.

I'm considering getting a Leaf in a few years' time.

  • Like 2

Just run it on united e10 (95 octane) just dont go ringing its neck everywhere and understand that it wont run as crisp as the ecu will most probably start retarding the timing.

Otherwise buy yourself a commodore, feed it 91 and thrash its tits off [emoji3]

Is it really so expensive?  

If you cant afford to buy 98octane then sell nissan and buy prius. 

Here in Finland, gasoline costs more than 1.7€L(2.75aud) have said that when gasoline costs more than 2€L (3.24aud) so only friends drive their cars?

21 hours ago, V35_Paul said:

it's tuned for 95 and can run on 91 but only recommend for short periods. Maybe a tank or 2.

It wont burn as clean and things get dirty over time.

you might lose 5kw. thats a guess

I would refrain from spreading misleading facts.

It requires 95RON+ to suppress knock not because it needs "clean" fuel, nothing about it won't burn as clean and things get dirty over time.

You might lose 10~30kW because you've go past MBT and/or in knock territory.

  • Like 1
7 hours ago, Dose Pipe Sutututu said:

I would refrain from spreading misleading facts.

It requires 95RON+ to suppress knock not because it needs "clean" fuel, nothing about it won't burn as clean and things get dirty over time.

You might lose 10~30kW because you've go past MBT and/or in knock territory.

Yeah.. I get a bit sick of saying this.  RON is a measurement of the fuel's resistance to knock or self detonation, in Australia there is also a considerably lower allowable level of sulphur in premium fuels, other than that, there is no difference beside what individual fuel suppliers may or may not decide to add to their premium fuels.

I'm also not sure about the newer versions of the VQ, but the DE does not 'adjust' to low octane fuels.  If it detects knock, it switches to a 'knock map' for timing and richens the fuel mix.  It is a safety mechanism to try to prevent engine damage, not a tuning mechanism.

As you can see, MyBrains, you're looking at this all wrong.

Remapping an ECU is not a cheap task, even if you can get your hands on a generic map to avoid the dyno. The math dispels any theory for cost savings.

The engine is mechanically set up to perform. If you're actually prepared to lose even 10kW of performance, then you really don't want or need a performance vehicle. Obviously, there's no point in doing an engine swap to an SR20DE (HA!) because of the math we spoke of before.

So that leaves you with a few options:
Drive with a much lighter foot
Sell the car and downgrade to a less-thirsty vehicle
Rip the motor and drivetrain out and pedal it like Fred Flintstone

That's the reality. Personally, I'm not made of money and I'm not happy about the rising fuel costs but I love my car too much to give up anything about it and potentially damage it.

  • 2 weeks later...
On 10/9/2018 at 8:18 AM, Dose Pipe Sutututu said:

I would refrain from spreading misleading facts.

It requires 95RON+ to suppress knock not because it needs "clean" fuel, nothing about it won't burn as clean and things get dirty over time.

You might lose 10~30kW because you've go past MBT and/or in knock territory.

clean fuel?? who's using dirty fuel?

98 is $1.64 at Cross Roads Costco, $1.60 BP Villawood ATM 

Get the "petrol spy" app or simular

In the end owning a car is expensive, sell car and pick something within your  budget.

My 86 uses 9L of 98 per 100km, I thrash it everywhere, and yes it is as slow as 10 slow things, but it is as fun as 10 fun things, and it's cheap to run.

Buy a VW Golf  or GTI or Tiguan MK2

I have the latter, I forget I even have a Skyline at home.

Newer DI turbo charged motors are so efficient at making power, torque and of course speed. 

4 hours ago, GTSBoy said:

Must have had 5 blocked injectors!  My RB20 routinely used 12 - 13 in traffic.  And by "traffic" I mean, 50+ minutes to drive 25 km.

100% stock but with a NEO6 turbo, it's off boost most of the time.
Seriously, easily got 600km out of a tank.
And I was driving across Sydney.

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

    • Welcome to my 2004 Toyota Mark ii IR-V Fortuna (series 2) With a 1JZ-GTE powerplant under the bonnet (hood) it'll give me plenty of scope for power upgrades. For those who aren't familiar with imports, the 1JZ-GTE is a 2.5L 6 cylinder VVTi engine with a single turbocharger. This has the factory R154 5 speed gearbox, along with a aftermarket 2 way LSD differential (brand unknown). Under the arches are a set of CST Zero 1 alloys, 18x9 +30 225/40 up front and 18x9.5 +15 265/35 on the rear. The car was quite low in Japan and there's evidence of the wheels catching the rolled arches/fenders. The tyre's aren't great so I'm in two minds whether to replace both or just the tyres and put up with the wider wheels on the rear. The car still uses stock brakes with the addition of some braided hoses. The exterior is stock with the exception of a BN Sports front bumper and a replacement Fortuna grill  Moving to the interior, the steering wheel has been replaced with a dished MOMO steering wheel (which will get swapped for my Momo Tuner for the time being) Defi Link Gauges are mounted above the climate controls and on the A pillar, the Oil Temp,Oil Pressure,Water Temp and Boost gauges should help with spirited and track driving  The stock seats have been replaced with some retrimmed Recaro bucket seats. Being a larger build these are a little snug, unfortunately the orange isn't for me so I'll look into replacing these down the line. Other modifications include a twin plate clutch, Blitz intercooler, Evolve alloy radiator, a stainless exhaust with decat, HKS EVC-S boost controller and coil overs
    • Apologies for the long read My R34 GTT was up for sale at the beginning of spring due to a few repairs creeping up. The strut tops needed replacing, roof and bonnet (hood) painting (yay for 3 stage pearl) and the underside stripped and treated. I sold the car which allowed me to be in a much better place financially. Leading up to the sale I was already thinking about the replacement. In an ideal world it needed to be a good all-rounder. Something I can mess around with, modify, do track days, do the school run, go on long drives etc.  Options included but not limited to... Laurel C35, Evo 8/9, Civic FD2, Impreza Hawkeye, Aristo and even an Audi S4 Avant (I've already got the Mazda 6 wagon). But there was always one car at the top of the list The Toyota Mark ii JZX110 I found an advert on a Facebook group for an example in Japan, from a seller called Jon at Rising Sun Exports. A few messages back and forth and Jon calls me from Yokohama one morning (or afternoon in his case). He briefly explained the import process, the costs involved and a repeat of the advert. After much deliberation, the price was agreed and the sale was locked in. I've never imported a vehicle so I jumped into the unknown head first. The money transfer was completed through wise.com (fees apply), very easy to use and the money was with him within a day or two.  The car suspension was raised for the vessel and the car dropped off at the port. It was 7 weeks later when the bill of lading was received and the freight invoice sent to me, followed by the export certificate a couple of days after (both digital copies) In the mean time the port had been in contact. I needed an agent to deal with the NOVA (notification of vehicle arrival) along with the tax/duty invoice, this was £75.00. The port also had a fee of £100, I'm guessing to cover the cost of the 10 day 'free storage' and for moving the car off the boat etc. They need a copy of the vehicle invoice, freight invoice and export certificate to allow the vehicle to pass through customs. The vessel arrived on Tuesday 5th August, the tax/duty invoice was generated and sent over. This is generally tax 20% and duty 10% of the vehicle value. Although the invoice came in at a higher amount than I had calculated. Once HMRC had received the payment the vehicle could be released from customs. I thought once the tax/duty was paid you could collect at any point, that's not the case. Your agent will need to book a collection slot, I requested Thursday 7th which was accepted, with a 9:00am slot allocated. It was a 5:00am start from Norfolk heading to Southampton. We eventually found the compound, upon presenting the bill of lading and some ID they released the car (they drove it out of the compound to the front ready for us to load up). The email from the port stated each slot had a 10 minute window, which seemed abit farfetched but the staff said it's not a strict rule. We were there for approx. 30-40 mins in total. A week prior to collecting I contacted my garage and explained the situation, I was able to get an inspection slot that afternoon. For the registration, DVLA require the car to be insured, for this I used a company called Adrian Flux who can insure the vehicle using the VIN number. 
    • Hey guys, looking for these side skirts if anyone can help me out. 
    • Wife and I are still looking for a new home. One condition was a large enough garage for a full-size lift in one bay. Now if only we could find something... We've been looking for almost a year now.
    • Thanks everyone for the ideas! Sadly, ramps are a no go for me. With young kids at home, I do most of my work late at night while they're sleeping. Starting the car multiple times wouldn't be a great idea.  I'll go see one of those new long reach low profile jacks and take a couple measurements to see if they will fit.   
×
×
  • Create New...