Jump to content
SAU Community

E85/98 Flex-Fuel Mission Complete! Thanks To Chequered Tuning!

SS8_Gohan
 Share

Recommended Posts

  • Replies 163
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

SS8_Gohan
SS8_Gohan

It what i think may be an Australian, possibly world first for a GTR, Trent @ Chequered Tuning (formerly Status Tuning) has managed to turn my R34 GTR into a genuine Flex Fuel car I can now run my c

N1GTR
N1GTR

I'll ask him aswel what sensors he would go for and which sensors the ECU supplier likes. Agreed saving $50 isn't worth it, but it doesn't hurt to ask and see what they have to say, who knows the ec

Madaz Grand Master

Madaz

Posted
Posted

taken off another forum

User 1 - Caltex are only and have only produced 70% Ethanol content fuel.

Its consistant 70% all year around at three local servo's here.

User 2 - He's telling me he emailed them today and they are switching to a summer blend 85% on november 30

He has gone with the decision to tune for united and then run caltex if needed.

sits tight and waits for confirmation :D

SS8_Gohan Grand Master

SS8_Gohan

Posted
  • Author
Posted

i was running Eflex at the beginning of all this, and despite a batch or two or low to mid 60's, after that, my sensor only ever read E70,bang on every time. Even in summer. We know that Caltex up until this point has never switched to a summer blend.

Then united came back in the game (big time here in Melb) and they've been very consistent, i've never seen lower then 82 or higher than 85.

I'm more than happy to run a tank of Eflex after Nov 30th to confirm this for you :)

Madaz Grand Master

Madaz

Posted
Posted

cool cheers might make it like a week after to make sure their tanks have been over 90% refilled with a new blend

i found a quote from Martin Donnon saying Caltex had capped their E85 @ 70% for the first 2 years maybe theyre at the end of that 2 years

i will go look for quote

Madaz Grand Master

Madaz

Posted
Posted
Q: Whats better United E85 or Caltex E-Flex?

A: That depends on the application. The major difference is that United tends to test at around 85% - 88% Ethanol content while Caltex have frozen their E-Flex at 70% Ethanol for the first two years of production. This means that although there is around a 2% greater power potential with United, the Caltex is better in 'fuel system limited' applications where the injectors and or pump are becoming marginal

Source

SS8_Gohan Grand Master

SS8_Gohan

Posted
  • Author
Posted

to me (and i've just realised this.... hahahaha) it's like having Lindt's 70% dark chocolate compared to Greens organic single origin 85% dark chocolate... you can't go back, 70% is too sweet - you need the hard stuff from then on :D

maybe my subconscious has been directing me to choose the 85% dark chocolate lol :D haha, can't believe i haven't made this connection before!

seriously though, Greens 85% is the absolute shizzle.... just like United's E85 :D

but bring on the Caltex E85! It feels like a cop out using it at the moment, more 'true' E85 outlets the better!!

vspecIInur Experienced

vspecIInur

Posted
Posted

I will just stick to united 85 for now. Amazing how the powerfc is so robust still with an e85 tune still.

My car is still using the nismo intank fuel pump. Not far off from reaching the 400kw mark on basic mods. The id1000s are only maxing out between 73-78% duty. So definitely impressed it with.

Go to Trent at Chequered for any sort of tune :)

  • 2 weeks later...
roba Enthusiast

roba

Posted
Posted

Great write up Daniel.

I have a sensor ready to install in my boat, I was just wondering why you tee'd off your fuel return line and didn't run all the return fuel through the sensor?

Is the sensor restrictive?

I have twin 044's and was hoping to run the return through the sensor...

Piggaz Grand Master

Piggaz

Posted
Posted

Great write up Daniel.

I have a sensor ready to install in my boat, I was just wondering why you tee'd off your fuel return line and didn't run all the return fuel through the sensor?

Is the sensor restrictive?

I have twin 044's and was hoping to run the return through the sensor...

It's too small. Tee it off

scotty nm35 Grand Master

scotty nm35

Posted
Posted

It's only in the return line, it won't affect the maximum flow as the injectors are before it.

If you look inside your reg you will probably find a 2-3mm hole for the return bypass. It won't be an issue imo. I would still 'T' it off though just to be sure.

SS8_Gohan Grand Master

SS8_Gohan

Posted
  • Author
Posted

weird how Syd seems to vary more, and seems to be more on the high side? my united has been bang on E85 last few times, and before that it generally was 82-83 - but it's still been a very tight range.

owenliberts Enthusiast

owenliberts

Posted
Posted

It's only in the return line, it won't affect the maximum flow as the injectors are before it.

If you look inside your reg you will probably find a 2-3mm hole for the return bypass. It won't be an issue imo. I would still 'T' it off though just to be sure.

uhh yeah. restriction in the return so will bump up fuel pressure if anything, brain fade!

Piggaz Grand Master

Piggaz

Posted
Posted

its fine running it full return on a few 400 +rwkw cars now.

Wouldn't it depend on what the fuel system setup is? IE having 2 x 044's at full noise at idle (if they ain't setup in a staggered setup).

Lithium Grand Master

Lithium

Posted
Posted

its fine running it full return on a few 400 +rwkw cars now.

So you don't have any weird fuel pressure related issues at really low load with a big (300+lph worth) where the FPR would be dumping fuel back to the return?

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      RB25DE NEO with Haltech ECU

      By GTSBoy · Posted

      I saw you mention this earlier and it raised a red flag, but I couldn't believe it was real. Yes, the vacuum signal should vary. It is the one and only load signal from the engine to the ECU, and it MUST vary. It is either not connected or is badly f**ked up in some way.
    • Murray_Calavera
      RB25DE NEO with Haltech ECU

      By Murray_Calavera · Posted

      @Haggerty you still haven't answered my question.  Many things you are saying do not make sense for someone who can tune, yet I would not expect someone who cannot tune to be playing with the things in the ECU that you are.  This process would be a lot quicker to figure out if we can remove user error from the equation. 
    • MBS206
      R32 GTS (RB20DE) Injectors Replacement

      By MBS206 · Posted

      If as it's stalling, the fuel pressure rises, it's saying there's less vacuum in the intake manifold. This is pretty typical of an engine that is slowing down.   While typically is agree it sounds fuel related, it really sounds fuel/air mixture related. Since the whole system has been refurbished, including injectors, pump, etc, it's likely we've altered how well the system is delivering fuel. If someone before you has messed with the IACV because it needed fiddling with as the fuel system was dieing out, we need to readjust it back. Getting things back to factory spec everywhere, is what's going to help the entire system. So if it idles at 400rpm with no IACV, that needs raising. Getting factory air flow back to normal will help us get everything back in spec, and likely help chase down any other issues. Back on IACV, if the base idle (no IACV plugged in) is too far out, it's a lot harder for the ECU to control idle. The IACV duty cycle causes non linear variations in reality. When I've tuned the idle valves in the past, you need to keep it in a relatively narrow window on aftermarket ecus to stop them doing wild dances. It also means if your base idle is too low, the valve needs to open too much, and then the smallest % change ends up being a huge variation.
    • Haggerty
      RB25DE NEO with Haltech ECU

      By Haggerty · Posted

      I guess one thing that might be wrong is the manifold pressure.  It is a constant -5.9 and never moves even under 100% throttle and load.  I would expect it to atleast go to 0 correct?  It's doing this with the OEM MAP as well as the ECU vacuum sensor. When trying to tune the base map under load the crosshairs only climb vertically with RPM, but always in the -5.9 column.
    • CF.Panda
      R34 25GT Engine Light 21

      By CF.Panda · Posted

      AHHHH gotchaa, I'll do that once I am home again. I tried doing the harness with the multimeter but it seems the car needed a jump, there was no power when it was in the "ON" position. Not sure if I should use car battery jump starter or if its because the stuff that has been disconnect the car just does send power.
×
×
  • Create New...