Jump to content
SAU Community

Limits of 550cc injectors running E85

Chris32

By Chris32,
in Engines & Forced Induction

 Share

Recommended Posts

Chris32 Veteran

Chris32

Posted
Posted

I've read and searched but can't find too many answers as most seem to opt for 1000cc injectors

Basic run down - HKS 2535/550cc KPM Injectors/Walbro 255 pump - 260kw at 18psi now

I never planned on using E85, however plans change :) My plan is just to fill it up with E85 and see where we get with the tuning

Given the turbo hasn't got much left in it, what's people's thought's on this being enough?

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

They are too small, unless you bump up the base fuel pressure to 4 bar.

You'll need about 35% more fuel flow. Say if you're already at 80~90% DC then you won't have headroom for E85.

You'll be able to get more power out of your setup, as I can imagine you're pretty knock limited on 98RON with that small turbo. Don't expect miracles but a 10~15% gain in power is possible :) 

joshuaho96 Veteran

joshuaho96

Posted
Posted

ID1050x still has a very narrow spray angle, most of the fuel will go straight down the intake divider. Toyota made that work by using air assisted fuel injectors but as far as I know the RB26 has no such system and is much more reliant on the injector itself providing the spray pattern and atomization. Bosch motorsport has the 040 980cc injector which works great, just make sure you get a flow matched set.

  • Like 1
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted
37 minutes ago, joshuaho96 said:

Bosch motorsport has the 040 980cc injector which works great,

They also don't mind high rail pressure too, at 4bar they become "1150cc" as most retailers advertise them at which is misleading. Just like how plenty of eBay retailers called the Bosch 1550 a 1650cc injector 

  • Like 1
statue Enthusiast

statue

Posted
Posted (edited)

I had 257 kw using 98 fuel: 525cc XSpurt Injectors and 255 LPH Pump at 20~18 PSI.

Told my tuner I just wanted E85 and see what it can do.

Tuner said not enough fuel pumping and had to upgrade to Walbro 416 LPH .

 

End of the day it made 295 kw 21PSI on E85 using 525cc Injectors at 100% duty cycle

 

In my experience, never go weak on fuel. I now have XSpurt 1000cc + 2xBosch 044's in a surge tank, the same 416 pump in the stock tank. Don't limit yourself just to upgrade it again later :D

Edited by statue
  • Like 1
GTSBoy Grand Master

GTSBoy

Posted
Posted
26 minutes ago, statue said:

In my experience, never go weak on fuel. I now have XSpurt 1000cc + 2xBosch 044's in a surge tank, the same 416 pump in the stock tank. Don't limit yourself just to upgrade it again later :D

With the caveat that too much/many pumps leads to fuel heating problems unless you put the effort in to control the pumps properly.

  • 2 weeks later...
Chris32 Veteran

Chris32

Posted
  • Author
Posted

Got to 278 without too much hassle, swapped the pump out to a Walbro 460lph unit prior to tuning

As per most E85 results, picked up power and torque everywhere. Still some more left in it if I really wanted to squeeze it, but the tune was done with some upcoming track days so it's reasonably conservative

 

Happy with the results given the basic mods it has

72095395_641766156351874_6274794159706472448_n.jpg

mr_rbman Grand Master

mr_rbman

Posted
Posted
On 10/16/2019 at 2:19 PM, Chris32 said:

Got to 278 without too much hassle, swapped the pump out to a Walbro 460lph unit prior to tuning

As per most E85 results, picked up power and torque everywhere. Still some more left in it if I really wanted to squeeze it, but the tune was done with some upcoming track days so it's reasonably conservative

 

Happy with the results given the basic mods it has

72095395_641766156351874_6274794159706472448_n.jpg

good results, you appear to have very similar mods to my track car so will be interesting to compare, which dyno in Adelaide is this on?

 

Chris32 Veteran

Chris32

Posted
  • Author
Posted
On 10/19/2019 at 10:07 AM, mr_rbman said:

good results, you appear to have very similar mods to my track car so will be interesting to compare, which dyno in Adelaide is this on?

 

Boostworx does all my tuning

  • Like 1

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

    • Turbodoc
      Noobie Stagea owner..

      By Turbodoc · Posted

      Hey Dave, welcome aboard! Good to see another soon-to-be Stagea owner here. The wagons are awesome — plenty of space, still got that Skyline DNA, and loads of potential if you’re into mods. Definitely post up pics when you get it, everyone here loves seeing new builds. What model/year are you looking at?
    • GTSBoy
      Duncan's V37.......race car?

      By GTSBoy · Posted

      See if you can thermal epoxy a heatsink or two onto it?
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      The other problem was one of those "oh shit we are going to die moments". Basically the high spec Q50s have a full electric steering rack, and the povo ones had a regular hydraulic rack with an electric pump.  So couple of laps into session 5 as I came into turn 2 (big run off now, happily), the dash turned into a christmas tree and the steering became super heavy and I went well off. I assumed it was a tyre failure so limped to the pits, but everything was OK. But....the master warning light was still on so I checked the DTCs and saw – C13E6 “Heat Protection”. Yes, that bloody steering rack computer sitting where the oil cooler should be has its own sensors and error logic, and decided I was using the steering wheel too much. I really appreciated the helpful information in the manual (my bold) POSSIBLE CAUSE • Continuing the overloading steering (Sports driving in the circuit etc,) “DATA MONITOR” >> “C/M TEMPERATURE”. The rise of steering force motor internal temperature caused the protection function to operate. This is not a system malfunction. INSPECTION END So, basically the electric motor in the steering rack got to 150c, and it decided to shut down without warning for my safety. Didn't feel safe. Short term I'll see if I can duct some air to that motor (the engine bay is sealed pretty tight). Long term, depending on how often this happens, I'll look into swapping the povo spec electric/hydraulic rack in. While the rack should be fine the power supply to the pump will be a pain and might be best to deal with it when I add a PDM.
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      And finally, 2 problems I really need to sort.  Firstly as Matt said the auto trans is not happy as it gets hot - I couldn't log the temps but the gauge showed 90o. On the first day I took it out back in Feb, because the coolant was getting hot I never got to any auto trans issues; but on this day by late session 3 and then really clearly in 4 and 5 as it got hotter it just would not shift up. You can hear the issue really clearly at 12:55 and 16:20 on the vid. So the good news is, literally this week Ecutek finally released tuning for the jatco 7 speed. I'll have a chat to Racebox and see what they can do electrically to keep it cooler and to get the gears, if anything. That will likely take some R&D and can only really happen on track as it never gets even warm with road use. I've also picked up some eye wateringly expensive Redline D6 ATF to try, it had the highest viscosity I could find at 100o so we will see if that helps (just waiting for some oil pan gaskets so I can change it properly). If neither of those work I need to remove the coolant/trans interwarmer and the radiator cooler and go to an external cooler....somewhere.....(goodbye washer reservoir?), and if that fails give up on this mad idea and wait for Nissan to release the manual 400R
    • Duncan
      Duncan's V37.......race car?

      By Duncan · Posted

      So, what else.... Power. I don't know what it is making because I haven't done a post tune dyno run yet; I will when I get a chance. It was 240rwkw dead stock. Conclusion from the day....it does not need a single kw more until I sort some other stuff. It comes on so hard that I could hear the twin N1 turbos on the R32 crying, and I just can't use what it has around a tight track with the current setup. Brakes. They are perfect. Hit them hard all day and they never felt like having an issue; you can see in the video we were making ground on much lighter cars on better tyres under brakes. They are standard (red sport) calipers, standard size discs in DBA5000 2 piece, Winmax pads and Motul RBF600 fluid, all from Matty at Racebrakes Sydney. Keeping in mind the car is more powerful than my R32 and weighs 1780, he clearly knows his shit. Suspension. This is one of the first areas I need to change. It has electronically controlled dampers from factory, but everything is just way too soft for track work even on the hardest setting (it is nice when hustling on country roads though). In particular it rolls into oversteer mid corner and pitches too much under hard braking so it becomes unstable eg in the turn 1 kink I need to brake early, turn through the kink then brake again so I don't pirouette like an AE86. I need to get some decent shocks with matched springs and sway bars ASAP, even if it is just a v1 setup until I work out a proper race/rally setup later. Tyres. I am running Yoko A052 in 235/45/18 all round, because that was what I could get in approximately the right height on wheels I had in the shed (Rays/Nismo 18x8 off the old Leaf actually!). As track tyres they are pretty poor; I note GTSBoy recently posted a porker comparo video including them where they were about the same as AD09.....that is nothing like a top line track tyre. I'll start getting that sorted but realistically I should get proper sized wheels first (likely 9.5 +38 front and 11 +55 at the rear, so a custom order, and I can't rotate them like the R32), then work out what the best tyre option is. BTW on that, Targa Tas had gone to road tyres instead of semi slicks now so that is a whole other world of choices to sort. Diff. This is the other thing that urgently needs to be addressed. It left massive 1s out of the fish hook all day, even when I was trying not too (you can also hear it reving on the video, and see the RPM rising too fast compared to speed in the data). It has an open diff that Infiniti optimistically called a B-LSD for "Brake Limited Slip Diff". It does good straight line standing start 11s but it is woeful on the track. Nismo seem to make a 2 way for it.
×
×
  • Create New...