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

    • Dose Pipe Sutututu
      The Evolution Of "night Fury"

      By Dose Pipe Sutututu · Posted

      glitch in the matrix haha
    • Dose Pipe Sutututu
      Why am I hitting a power wall with my stroked RB25?

      By Dose Pipe Sutututu · Posted

      A few suggestions: Do you have the option of retarding your exhaust cam gear to bring the power band over to the left? VCT would be turned off after you make peak torque, you see the power/torque will decay faster with it left on all the way to the limiter Once VCT is turned off, you'll find the motor will take a bit more timing being ramped in Send its mum, more boost! Of course, depends on your exhaust pressure.
    • dyl33
      The Evolution Of "night Fury"

      By dyl33 · Posted

      Tow a boat... people won't know wtf is going on 🤣 
    • TurboTapin
      Why am I hitting a power wall with my stroked RB25?

      By TurboTapin · Posted

      I was back on the dyno again yesterday after completely revamping my methanol injection system. I was making 440kw at 19psi. Great, this is more then I was making last summer with my old meth system at that pressure, and I figured it would be smooth sailing up to 30+psi. We continued increasing from there and by 25psi, I had only hit 455kw. Dyno sadly lost utility power at this point and I left. We seemed to be on course to hit the same power wall as last summer (477kw@27psi). This is a built RB25 S1 stroked to a 2.8. Built and ported head with Kelford 272/262 cams. Precision 6466 Turbo. Tuner last year believed the power wall is a mix of RPM limitations (Hydro lifters/Limit set at 7600RPM) and fueling. With my new meth system, we're seeing zero knock now but it still won't go up.  What else can I do at this point? Here's my train of thought.  - It's clear from the dyno graph that I would easily make power to 8500+RPM but I'm limited to 7600RPM. I could risk increasing my limiter, but hydro lifters have me worried. What are my options here besides going NEO head or solid lifter conversion? I'm rocking a 1.05AR turbine on my 6466. Would dropping down to a .84 help shift that power down in anyway? - We're only seeing roughly a 30kw difference at the top end with VCT on or off. Is this normal? I want to confirm VCT is working properly. - Should I look into other cam options?  - Should I just keep increasing boost and see if she wakes up later on? I would expect to hit 600rwkw around 35psi with my 6466.   
    • Murray_Calavera
      iPad gauge cluster

      By Murray_Calavera · Posted

      First thought is to use a ram mount (to hold the ipad) + windscreen suction mount. The arms on the ram mount can be as long as you like, should be able to position the ipad pretty well with that setup. 
×
×
  • Create New...