Fuel Usage & Safc

[dnbosiris]

hey guys

I've had my R33 GTS-T for a couple of weeks now, mods are turbo back exhaust, pod filter, cold airbox coming soon & R34 gtt SMIC.

The car came with an SAFC but it's not currently hooked up as the previous owner said it wasn't running properly with it connected.

It's currently using around 13L/100km's fuel, i don't know how normal that is but I assume it's running rich cause there's the popping of unburnt fuel out the zorst whenever you take it over 3-4k rpm and then change gears.

so my question: performance & fuel wise is it worth forking out the $150 or so to get it tuned at a workshop with the SAFC? how much difference does it make to performance when you lean out the AFR's?

and yeah i'm aware you don't buy a skyline because of fuel efficiency, i'm just wondering what difference it would make

cheers

Edited April 4, 2009 by dnbosiris

[Pal]

im getting around 11L to 12L/100. high traffic areas mainly with a little cruising and a few stabs here and there. performance wise, you will get a bit. depends how good your tuner is

Edited April 4, 2009 by Pal

[paulr33]

there you will get a good gain overall in terms of power, response, driveability, economy and overall car performance from any sort of tune

wether this is a remap, a complete stand alone solution or a tune of a piggyback system such as the safc

the safc system is bulletproof, cheap and does wonders for a mild GTST (like yours)

tune away, however id reccommend changing to a FMIC instead before you tune it

youll find the SMIC will just get heat soaked and provide little to no cooling of the intake charge once you fit an exhaust and up the boost to around 12psi. also before you get it tuned replace the standard 02 sensor. they die after around 50,000kms ish and the part is about $100

the 02 sensor is solely responsiblie for gettign good fuel economy. with a good setup you can have plently of power and 400km's to tank each time easily

[dnbosiris]

hey paul

I was actually planning a boost increase (bought a turbotech MBC) down the track however I decided to put that off until I can afford a new fuel pump to go with it, in case my 16 yr old stock one isn't up to the task once i up the boost. I was going to do the tune at that point all in one hit but now that I have delayed that I'm wondering if it's worth just getting the tune while on stock boost. From what you say it definitely is. not 100% sure about my o2 sensor but i think it was replaced 6 months ago.

[paulr33]

dont bother tuning with stock boost, its a waste of time and $

run around 10psi and tune around that, standard pump should be ok

around 12psi it might run out (mine did) and i fitted a GTR pump