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SAFC II Tuning for R25de engine

Anel Datt
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KiwiRS4T Grand Master

KiwiRS4T

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1 hour ago, Anel Datt said:

Hello I need help in tuning  SAFC II which is installed in RB25de non turbo. Can any help 

Since I guess you won't want to pay for a dyno you will need to pay for someone to stick an AFR sensor in your tail pipe ...but as above...why would you?

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Murray_Calavera Mentor

Murray_Calavera

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Yeah ok, so the short version is - your mixtures would be fine with the stock ECU. Which you should be able to see on your AFR gauge. 

Why did you replace the factory FPR?

Also, what are you trying to achieve by 'tuning' your essentially stock car, with a SAFC II?

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Anel Datt Apprentice

Anel Datt

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Well Im using this car for 1/4 Mile drags race in Fiji Islands. I took a advice from someone to install a SAFC II where it can be tuned... can it be tuned or need more or other options 
 

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GTSBoy Grand Master

GTSBoy

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46 minutes ago, Anel Datt said:

can it be tuned or need more or other options

Need a reason to tune it. (Which you do not really have, even if drag racing is what you are wanting to do). There is precious little you can do to wring more power out of an NA engine. Advance the CAS a couple of degrees and you will save yourself the thousand seashells that it would cost to "tune" it with the SAFC.

If you want more power, you are going to have to put something onto the engine that will add power. That can be NA mods (cams, porting, compression), or nitrous or a turbo or a blower. The NA mods are a bad idea (on power per $). Nitrous will see you destroy your engine. A blower is always too hard for everyone. So, you need a turbo. Then, you need an ECU, not the SAFC, which is a pig's breakfast way to tune an engine.

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KiwiRS4T Grand Master

KiwiRS4T

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Since you have the SAFC (already installed?) and an AFR gauge you may as well play with it so long as you understand it will give you little or nothing in the way of performance gains. Just Google SAFC II tuning and you will find articles and a couple of videos on how to do it.

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Murray_Calavera Mentor

Murray_Calavera

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1 hour ago, Anel Datt said:

Well Im using this car for 1/4 Mile drags race in Fiji Islands. I took a advice from someone to install a SAFC II where it can be tuned... can it be tuned or need more or other options 
 

Nissan has already tuned your stock ECU. You will not be able to improve on the factory tune by playing with your SAFC. 

If you want to play with it for fun, go ahead and enjoy yourself. Just be mindful that there is nothing to be gained power-wise and there is the potential to damage your motor if you don't know what your doing (eg if you lean the mixtures out too much under high load). 

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Ben C34 Grand Master

Ben C34

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Glad to help 

It's good you can come here to get the advice that drag racing a non turbo skyline is not the best idea. Unless of course you are racing people on push bikes

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niZmO_Man Grand Master

niZmO_Man

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Probably a good idea to detune the engine so it doesn't grenade itself with the fuel they get over there.

You can't really make the N/A go faster without spending big money, and then you'd be far better of with a turbo car to begin with.

So look at weight reduction and suspension tuning+tyres.

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