Jump to content
SAU Community

Recommended Posts

With my R32 I get about 300 km per fuel tank - 55L. Rarely I would get over 300 km.

It seams like it doesn't really matter much if I gun it quite a bit or not, it's always within 20kms. I'm still using stock computer and stock injectors. A/F ratio is on the ritcher side, low 11s.

Even the boost I run doesn't play major role when it comes to the fuel consumption. Is it the O2 sensor or something else?

  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

I have consistently got 500km out of each tank with my R33 since I got it. Love it, it has saved me on fuel compared to the '99 Ghia V8. Although I have had to baby it a bit in the wet, the simex tyres on it are pure shit, like driving with bald tyres.

Thanks for all the help guys.

I have taken out the new O2 sensor and replaced it with the old one as my microtech ltx-12 does not use the O2 sensor.

I am selling the new O2 sensor on www.firesport.com, so if anyone with a stock ecu or one that needs the O2 sensor want to try imporve fuel economy the sensor.

Am getting more tunning done soon to try increase my fuel economy.

Ps. after the last time my car went on the dyno managed to squeze 330km out of a tank.

Get rid of the Microtech, they are essentially an electronic carbie, and save having to re-jet the carbs:)

I sue to get shocking fuel economy with my old LT8 runnning on a lightly modded RB20. It took a lot of work to get the eeconomy acceptable... and it took an Autronic dealer to get it right...all the Microtech tuners seemed to be wide open throttle jockeys who expected you to live with poor throttle response, poor economy albeit with good WOT power.

Now with my current car i am getting 400-450kms of city driving with a PFC and 235rwkws. (Thats not boosting it very much and 50 of my 120 daily kms are on the highway.

Ditch the Microtech or go to a tuner who is willing to work on the light load maps

I'm having the same issues. standard ecu with new o2 sensor and still getting barely over 320kms.

I have a SAFCII. SHould I ask my mechanic to lean it out?

What is a safe AFR to run at for a stockish (SAFCII, FMIC, 11.5PSI Boost, 3" exhaust) R33? Please note that i'm from tas and we only have 95RON premium down here.

Oh yeah. The car seems to run really rich too. always popin/backfire noise when I change gear. I'm not getting any soot though.

Mine has always got good fuel consumption, even when it had the stock ecu and running in to the 10's at full throttle.

However I did notice at WOT around 3000-3500rpm it would hover around the low 13's. I was told it was normal as the Nissans run a little leaner in the mid to help fuel consumption.

On the dyno afr's were spot on 14.7:1 and would hang in there until 2psi of boost was being made. That was with the stock ecu and the rb20det.

It has never really backfired or popped. Only if I were to ever so slightly have my foot on the throttle.

A few things I would be looking at.

Fuel injectors, AFR's, O2, ECU's Water Temp sensor (one for the dash, one for the ecu), cam timing, compression.

http://www.skylinesaustralia.com/forums/at...achmentid=27315

this is my current tune. I've been told the AFRs look good.

From what i understand though an R33 should be able to produce a fair bit more power than what I'm running so should it be leaner?

The Lambda sensor sends the results to the Dyno Computer. With this reading they can work out the AFR.

Here is a picture of a Dyno read out with the AFR on them.

BTW I hate my fuel economy, only @250km per tank, really sucks!! Wish I could get @350 per tank.......mmmmmm 350 per tank :wassup:

Get rid of the Microtech, they are essentially an electronic carbie, and save having to re-jet the carbs:)

I sue to get shocking fuel economy with my old LT8 runnning on a lightly modded RB20. It took a lot of work to get the eeconomy acceptable... and it took an Autronic dealer to get it right...all the Microtech tuners seemed to be wide open throttle jockeys who expected you to live with poor throttle response, poor economy albeit with good WOT power.

Now with my current car i am getting 400-450kms of city driving with a PFC and 235rwkws. (Thats not boosting it very much and 50 of my 120 daily kms are on the highway.

Ditch the Microtech or go to a tuner who is willing to work on the light load maps

Finally somebody who know something about engine managment. Best piece of advice I could offer you firefox is to ditch the electronic carby and revert back to you standard ECU and have it chipped.

Sorry.. I was meaning that ~170kw could very well be 190kw on a Dynamic Dyno.

EDIT: I find it interestering how Racepace ran slightly richer afr's as torque hits then slightly richer once again once peak power is made. :P

I've seen a few cars now that have been tuned by RacePace.

One being an RB30DET.

They sure do know what they are doing. :)

Sorry.. I was meaning that ~170kw could very well be 190kw on a Dynamic Dyno.

 

EDIT: I find it interestering how Racepace ran slightly richer afr's as torque hits then slightly richer once again once peak power is made. :P

I've seen a few cars now that have been tuned by RacePace.

One being an RB30DET.

They sure do know what they are doing. :)

Hi there Cubes,

Would my AFR be contributing to what I believe is bad fuel economy?

Spoke to Ben at Racepace today about my fuel economy, he said Big Cams (Step 2 280)on my engine means that its out of its efficiency range on the freeway.

Couldn't I have a setting where it could lean out or something on the Autronics when it sensors highway use to go into an economy mode on light loads or something?

It very well could be the cams are not working well on the freeway.

With such large lobes it would require a bit of playing to improve fuel economy.

No doubt you will also loose a little top end to in order to improve bottom end torque, VE and fuel economy.

Everything has its trade off's. ;)

It may be worth dropping 20kw at the top end to pick up decent fuel economy.

250km's per tank is unbelievable. What injectors are you running?

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



  • Similar Content

  • Latest Posts

    • This^^^ 100%. Endless Male Attention. "buy a cool car, attract females". No reality is the opposite. "Buy a cool car, attract males".     
    • Just wanted to share the recent dyno results on my car. 20lbs of boost on pump gas. Pulled the fuse on the AWD so it was only rear wheels on the dyno. It made 484 hp at the wheels. I asked the tuner to see if we could do something so it breaks the 500hp level, but he said that we were maxxed out on pump gas. If i wanted to make more power, id have to go to E85.      8739a97a-9408-4eeb-b769-108ff1678736.mp4
    • While there is no current law for the spoon, let's swap to a different utensil. Example, does the store get fined for selling a butter knife if it ends up being a murder weapon? Perhaps they cpuld be done for assisting if they *knew* it was going to be for such a purpose. But, if used properly, which was its primary design, it's a tool for a job that's legal. I could understand companies being prosecuted if they advertise their products for being road legal if they in fact, are not. Possibly, but not necessarily, the tuners for tuning a car to a non legal fashion(emissions), but there is always the possibility that the customer really doesn't intend to use the car, in that configuration, on the road. So long as the companies can prove they have conveyed how illegal it is to use the now illegal car, in a place where the vehicle must meet the laws, they shouldn't be punished. Not sure about other countries or states, but I've been made aware that I can't legally stop a client from taking and driving their own car in NSW, Australia, even if they owe the shop money. It must go through court to get the funds from the customer, and you need to get the police or roads covering body representatives to come and stop the owner from driving the car, even if I know how hazardous the vehicle is.
    • probably around the $1700-1800 fitted in his sizes.  The ar1 is heaps cheaper. Get on scumplace I got some A052 295/35/18 for $400 that had done maybe 20-25 hot laps of SMP. 
    • People are going faster on CRS than AR1, so there's that 😕
×
×
  • Create New...