Jump to content
SAU Community

Drag Rb25Det, Fuel ?

BloodBath

By BloodBath,
in Engines & Forced Induction

 Share

Recommended Posts

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Your going to need a fair bit more power to run consistant mid 12's from a 13... Id spend some time taking weight out of the thing first. Then a ethanol tune.

Or nitrous.

Agreed to an extend only given his current time of 13.30 @ 107 & 2.0 60ft is quite decent, so the OP can certainly pilot well enough.

If he can get the 60ft down to 1.7 with the ET Streets then he is looking at a 12.8 up the other end (or there abouts)

Get the 60ft down to 1.6 and then it'll be pretty close to 12.6-12.7

Not quite a 12.5 but it's not gonna be far off that marker.

Lithium Grand Master

Lithium

Posted
Posted

Does anyone know the answer though, as far as to how much timing I can add at wide open throttle??

If only we could tell what timing we could put into setup changes without looking at a car... "more" is usually the answer, but really it needs to be tuned to suit to find out the amount. Possibly none at some points, and possibly several degrees at other points :)

STATUS Grand Master

STATUS

Posted
Posted

What sare some of the fastest stock turbo RB25's that you all have seen out there??

How much timing can I add at full boost when going from 91 oct to vp 116???

I'm shooting for a mid 12 on 12 psi, stock turbo.

10.61 @ calder std engine.

Beer Baron Grand Master

Beer Baron

Posted
Posted

E85 could work quite well, fyi 98RON we get in NZ and Oz is equivalent to 89MON :(

yeah maybe, but US fuel is not MON either. it's an average of MON and RON so their 91 is still not quite as good as our 98 but not as far off as most people think.

Beer Baron Grand Master

Beer Baron

Posted
Posted

MON is tested under load. Someone do correct me if I'm wrong.

yeah kind of wrong. both RON and MON are a measurements of the fuels ability to resist knock on a test engine. MON is tested at a higher RPM that RON which makes it a bit more relevant in most peoples eyes (we are still talking very low rpm, like under 2,000). both tests run the fuel in a special test engine with variable compression till it knocks but the mon test is at higher rpm, with heated fuel and the also advance the ign timing. RON (and MON for that matter) is out of 100 as compared to the control 'octane'. however since some additives in fuel have better knock resistance than the control (iso-octane) you can get a number higher than 100.

US 91 AKI fuel is about 95 RON. our 98RON is about 94 AKI but there is no direct correlation between RON and MON. some substances will be as much as 20 or 30 points higher in RON vs MON, some will be only a few points apart and some (like the control octane) are actually equal in RON and MON.

if you want more info i'm sure there would be some fuel info site or even wiki or howstuffworks etc on this.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

yeah kind of wrong. both RON and MON are a measurements of the fuels ability to resist knock on a test engine. MON is tested at a higher RPM that RON which makes it a bit more relevant in most peoples eyes (we are still talking very low rpm, like under 2,000).

if you want more info i'm sure there would be some fuel info site or even wiki or howstuffworks etc on this.

Yeah Wiki says 900rpm for MON and 600rpm for RON. Pretty low indeed.

Link for the lazy: http://en.wikipedia.org/wiki/Octane_rating

Some interesting reading, and will just lead to more google action if you wanted to know even more.

  • 2 weeks later...
KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

You are doing very well for the power level you have. The answer to your original question is to be found only on a dyno if you want to keep your engine in one piece. Your next mod should be an aftermarket computer - Link or Motec or whatever you can get tuned where you are.

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

    • Kapr
      ECU sees many times the speed than speedo does (R34 swap)

      By Kapr · Posted

      The car/ECU will have all the sensor that it needs and expect to have. I think i do not have to explain to you how the Link is way better specialy if you have swapped engine   I just do not want to deal with any "problems" cuz i have only Nistune which i learned is not that great and in my case cant even deal with that speed problem (Link can) And of course it will be way more easier to tune and diagnose and safe. And for the ECU/speed problem...i dont know.
    • wizlb
      Who has a Infiniti Q60, Q50 (V37)?

      By wizlb · Posted

      Per Mark Roberts of Sonictune: Mark Robert Author At this time, no. No ETA either 2016-17 models. You will be able to purchase and install a 2018.5+ TCU though   TCU purchasing and pricing info! As we near the release of TCU tuning, I am going to answer some questions I get asked often.   What do I need for TCU tuning? At this time, you will need a 2018.5+ TCU to be able to tune. If you have a 2016-to early 2018, you will need to replace your TCU with the newer version. One good way to know if your TCU is good is if you have auto upshift in manual mode in 1st gear around 6500 rpms. If your manual 1st gear goes to 7k rpm and will hit the rev limiter unless you shift, you have the older TCU.   Why do I need to buy another ecu license/phone flash if I already have it on my ECU tune? The TCU is its own computer module. It is completely separate from the ECU. Because of this, you will be required to purchase a TCU license and, if your tuner has it, the phone flash license required to tune it via phone/bluetooth.   Do I need TCU tuning? TCU tuning is NOT required. However, the faster your setup, the more it will assist in track and dragy time consistency.   If I’m ECU tuned by (tuner A) can I get my TCU tuned by (Tuner ? Yes, since it’s a different module and a completely separate flash, you can have two different tuners. However, it is highly recommend that you have both tuned by the same tuner. For me, my TCU tuning will directly complement my ECU tuning style and features and running my ECU and another TCU or vice versa MIGHT cause some issues. At this time and for the foreseeable future, I will only be tuning my current ECU tuned customers TCUs.     I have a SYVECS AWD controller. Do I still need it? Yes! The AWD controllers main job is to control your AWD system. However, with TCU tuning, you will no longer need the auto-shift function as that will be done through the TCU. The AWD controller will still be very beneficial for racers looking to maximize traction on the launch.     Shift schedule changes: holding gears longer at lower pedal input as well as max shift rpm changes. Please note, the new ECU race rom coming out will address 90% of the shitty drivability issues these cars have through custom maps from myself and Racebox—as well as others I am sure.   Increase shift speeds: as seen in the videos I’ve been posting, the TCU shifts much faster once tuned.   Increased shift pressures: as also seen in the videos, much firmer full throttle shifts.      
    • wizlb
      Who has a Infiniti Q60, Q50 (V37)?

      By wizlb · Posted

      Per Mark Roberts of Sonictune:     Mark Robert Author At this time, no. No ETA either 2016-17 models. You will be able to purchase and install a 2018.5+ TCU though   TCU purchasing and pricing info! As we near the release of TCU tuning, I am going to answer some questions I get asked often.   What do I need for TCU tuning? At this time, you will need a 2018.5+ TCU to be able to tune. If you have a 2016-to early 2018, you will need to replace your TCU with the newer version. One good way to know if your TCU is good is if you have auto upshift in manual mode in 1st gear around 6500 rpms. If your manual 1st gear goes to 7k rpm and will hit the rev limiter unless you shift, you have the older TCU.   Why do I need to buy another ecu license/phone flash if I already have it on my ECU tune? The TCU is its own computer module. It is completely separate from the ECU. Because of this, you will be required to purchase a TCU license and, if your tuner has it, the phone flash license required to tune it via phone/bluetooth.   Do I need TCU tuning? TCU tuning is NOT required. However, the faster your setup, the more it will assist in track and dragy time consistency.   If I’m ECU tuned by (tuner A) can I get my TCU tuned by (Tuner ? Yes, since it’s a different module and a completely separate flash, you can have two different tuners. However, it is highly recommend that you have both tuned by the same tuner. For me, my TCU tuning will directly complement my ECU tuning style and features and running my ECU and another TCU or vice versa MIGHT cause some issues. At this time and for the foreseeable future, I will only be tuning my current ECU tuned customers TCUs.     I have a SYVECS AWD controller. Do I still need it? Yes! The AWD controllers main job is to control your AWD system. However, with TCU tuning, you will no longer need the auto-shift function as that will be done through the TCU. The AWD controller will still be very beneficial for racers looking to maximize traction on the launch.     Shift schedule changes: holding gears longer at lower pedal input as well as max shift rpm changes. Please note, the new ECU race rom coming out will address 90% of the shitty drivability issues these cars have through custom maps from myself and Racebox—as well as others I am sure.   Increase shift speeds: as seen in the videos I’ve been posting, the TCU shifts much faster once tuned.   Increased shift pressures: as also seen in the videos, much firmer full throttle shifts.      
    • The Bogan
      NC MX5

      By The Bogan · Posted

      The fancy pants red shock tower brace is finally incoming from MX5 Mania, getting it shipped from 'Merica has been a long and problematic process, and GWR, the 'Merican supplier will not ship directly to consumers outside of the US, Mania basically had to order a heap of them, the colour choice was silver, or red, and we all know anything red adds 5 killerwasps of dynotorques..... Whilst it does fit over a 2.5, and I've seen a few photos and videos of it being installed and fitting, google also says it might get real close to the FAB9 intake front runner, people in the US says it does fit with the FAB9 intake, except for one person who said it slightly touched.......so there is that.....LOL..... As it seems that I am the first in AU to have this combination of parts there's no local knowledge about fitment, so I'm just a willing guinea pig in this endeavour, I'll cross my fingers and toes and hope for the best In other news, I ordered stuff from China  on the same day I ordered the 23° silicone bend from Victoria, the stuff from China arrived a day ago, the 23° silicone bend is still travelling around Australia thanks to Australia Post, and "may" be here next week
    • Duncan
      Who has a Infiniti Q60, Q50 (V37)?

      By Duncan · Posted

      Very good news...I contacted Racebox about it last night. My car is a 2016 so remains to be seen if it is compatible, requires a TCU swap, or is impossible.
×
×
  • Create New...