Jump to content
SAU Community

Safe Afr's For Rb26 T04z

GreeceS13

By GreeceS13,
in Engines & Forced Induction

 Share

Recommended Posts

NYTSKY Grand Master

NYTSKY

Posted
Posted
I ask if you are seroius because if you dont know the answer to your own question, then there is no way you should consider tuning your own car. Will the next question be what is ignition advance?

It will be whats the cheapest you have rebuilt you engine for.

GreeceS13 Rising Star

GreeceS13

Posted
  • Author
Posted

Ok I am serious but I would like to hear a second opinion!

I will not tune the car! I am not tuner.

But I don't know what to tell to the tuner to do with afr's!

I was thinking to tune it about high 10's afr at full throotle!

But as you said 11.5 I will do it!

What is the ignition advance?

You mean my static? I don't know but as I read I must put it at 20!

If you have any suggestion for ignition map tell me please.

I have power fc d-jetro in my hands! On Monday we will install it!

DCIEVE Mentor

DCIEVE

Posted
Posted

I will be interested to hear what sort of injector duty cycle you end up with using 800cc injectors and afr's around 11.0.

More important question imo is how much timing do you give the motor, afr's are only part of the picture. You will no doubt get some suggestions here but the people you want to hear from, experienced tuners, tend to keep this sort of info to themselves.

Strik3r Experienced

Strik3r

Posted
Posted
I was thinking to tune it about high 10's afr at full throotle!

But as you said 11.5 I will do it!

depends on the use of the car.. Personally, i'd be thinking ~11 under full boost and 12 coming on to boost. This will keep your pistons a bit cooler if you plan on doing track/drift. Your 800cc injectors will be fine for that turbo I'd be surprised if you have over 80% duty cycle. To be honest, this shouldn't be something you need to worry about - your tuner should know all of this stuff. Pump fuel you should be able to run 24psi safely enough. In terms of timing, again, your tuner should be calling the shots there.

GreeceS13 Rising Star

GreeceS13

Posted
  • Author
Posted

Guilt-Toy who has stock bottum? You didn't read my signature?!?!? :ermm::(

Thanks for your replies!

We have pump fuel with 100octane!

With this fuel I can run only 24psi?

The using is DRAG :)

I am not disposed to use race fuels.. but can I use any type of octane booster like C5 VP Racing Octane booster?

http://www.vpracing.com.au/Data%20Sheets/c5.pdf

http://www.vpracingfuels.com/C5.html?mgiTo...5B7C89F13B2D1BB

  • 2 weeks later...
The Dan Grand Master

The Dan

Posted
Posted
Ok I am serious but I would like to hear a second opinion!

I will not tune the car! I am not tuner.

But I don't know what to tell to the tuner to do with afr's!

I was thinking to tune it about high 10's afr at full throotle!

But as you said 11.5 I will do it!

What is the ignition advance?

You mean my static? I don't know but as I read I must put it at 20!

If you have any suggestion for ignition map tell me please.

I have power fc d-jetro in my hands! On Monday we will install it!

Why would you have to tell your tuner what AFR's?

He/She should know that.

And 14.7 is safe provided you run the appropriate timing to suit it. But I suggest you stay on or below 12 if you don't know what you are doing.

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
Why would you have to tell your tuner what AFR's?

He/She should know that.

And 14.7 is safe provided you run the appropriate timing to suit it. But I suggest you stay on or below 12 if you don't know what you are doing.

X2

STATUS Grand Master

STATUS

Posted
Posted (edited)

well i was about to say 12-12.2..... but im a little scared by all your other questions now :/... if your in inexperienced hands stick to 11.5

Edited by URAS

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

    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      Nah, that is hella wrong. If I do a simple linear between 150°C (0.407v) and 50°C (2.98v) I get the formula Temperature = -38.8651*voltage + 165.8181 It is perfectly correct at 50 and 150, but it is as much as 20° out in the region of 110°C, because the actual data is significantly non-linear there. It is no more than 4° out down at the lowest temperatures, but is is seriously shit almost everywhere. I cannot believe that the instruction is to do a 2 point linear fit. I would say the method I used previously would have to be better.
    • GTSBoy
      DeAgostini 1/8 scale BNR32 Nissan Skyline GT-R Nismo

      By GTSBoy · Posted

      That's hilariously putrid!
×
×
  • Create New...