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Lousy Fuel consumption

Muz

By Muz,
in Engines & Forced Induction

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Muz Experienced

Muz

Posted
Posted

Mind if I ask S/K about fuel consumption of 230klm per 50 litres (and that's with a very light right foot) around town but on the highway I get an even 10 klm per litre (various speeds). Would this signify toooooooo rich at around town speeds or am I barking up the wrong tree?

(Power FC + Apexi boost control kit+Apexi Pod filter+Z32 AFM+ 3" turbo back system+FMIC)

Or is someone helping them selves to my fuel?

Just joking about the last part

Cheers

Muz

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Muz Experienced

Muz

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  • Author
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Sure is terrible and yep had two tunes done (same bloke - that could be the problem) and produces good HP (210rwkw at 1 bar) but I have it set at only .7 bar most times. Our best local tuner is not PFC literate and those tunes were done at another location.

Cheers

Muz

wilch Grand Master

wilch

Posted
Posted

That doesn't sound too good re: fuel consumption.

Plus shouldn't an r34 be making more than 210rwkw with those mods at 14psi? (sure it might be the dyno, but to me that seems to be 10-20+ odd rwkw off the norm?)

I know it's bad to start saying check this and check that when you don't really have a clue (I'm still new to this thing), but have you had the timing checked? Maybe try a different tuner..

wil..

Muz Experienced

Muz

Posted
  • Author
Posted

Thanks wiich,

Ahh no, an R34 GTT in standard form will only put out about 206 kw at the flywheel. That equates to somewhere around the 140-150 mark at the wheels (I'm open to correction from those that will know the correct equation) so 210 is not too shabby under those circs. The problem that I have is reasoning why I get excellent mileage on the highway and really disasterous figures around town.

Go to another tuner you say. Not all that easy when you live 2000klms from the capital city and there are no decent PFC tuners in between. We have to work with what we have unfortunately.

Cheers

Muz

Bass Junky Grand Master

Bass Junky

Posted
Posted

How does your boost come on?

Is it tuned for an aggressive boost ramp?

Maybe if the boost is like a light switch, you are boosting more than you should around town, and when you get on the freeway you aren't boosting, therefore not using much fuel......

Abo Bob Grand Master

Abo Bob

Posted
Posted

How many Litre per 100kms Muz?

I use 13 L/100km on the highway and 15-18 around town normally but have been known to hit 33!

I am also concerned about fuel consumption but I only have a modified stock ECU. I think there must be something in the tune.

Muz Experienced

Muz

Posted
  • Author
Posted

Hi Bass Junky,

No, I have a very progressive boost setup and rarely get on boost around town. (can't afford the points after my travels thru NSW).

ABO BOB, Good to hear from you mate. How is the 4 door going, any more trips down to Wakefield? Consumption on the highway is an even 10 or better and around town up above 20. I also think it has to be in the tune but when I look at all the numbers in PFC H/C they mean squat to me. Looks like I will have to invest in a data logit set-up.

tang0 Proficient

tang0

Posted
Posted

yeah, i know mine is running pretty rich as well, gets lots of burps and pops from the zorst ...

pfc is on route from jap (well, when they are in stock) will be interesting to see if it makes a difference

cheers

i get about the same as tang0 maby the s2 mods are more economical but i know my car is running rich  

running 0.9 bar

Abo Bob Grand Master

Abo Bob

Posted
Posted
Hi Bass Junky,

No, I have a very progressive boost setup and rarely get on boost around town. (can't afford the points after my travels thru NSW).

ABO BOB, Good to hear from you mate. How is the 4 door going, any more trips down to Wakefield? Consumption on the highway is an even 10 or better and around town up above 20. I also think it has to be in the tune but when I look at all the numbers in PFC H/C they mean squat to me. Looks like I will have to invest in a data logit set-up.

Highway is very good Muz. Around town there must be something in the tune rather than anything broken. I get 13.6ish on the highway.

I've been to the creek once since I last saw you but I've now had my racing wheels and tyres stolen from my garage so no more racing for a while.

MicK51 Community Regular

MicK51

Posted
Posted

i struggle to get 300kms to 55L driving to work and back (all 60kph zones)

as soon as i hit the highway its awsome, 600kms to 55L when i drove down to grafton.

It must be the closed loop kickin in, i have a standard ecu with a tuneable chip. makes about 200rwhp in a r32 sedan.

Muz Experienced

Muz

Posted
  • Author
Posted

Geez A/B,

Sorry to hear about the wheels mate and yes I'm beginning to think that it is all in the tune. Checked the system out this morning on the way to work (via H/C) and all voltages appear to be where they should be so it has to be in the numbers. Oh for a decent PFC tuner up here. Getting to the point where I'm thinking about flying a tuner up from Brisbane just so he can coach our local tuner in the finer points of a PFC. PM'd the other reply to ya.

Mick, I would be happy with anything over 300 around town.

Cheers

Muz

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