Jump to content
SAU Community

Recommended Posts

Ive got a few bolt on mods to my R33 and its gettting very bad Fuel economy,

Im only getting 280km per tank on 98 octane, and to top it off its running like crap cos its not tuned for the new setup.

Question I have is how far can I expect to go after I get the new 2835 fitted and tuned at around 260rwkw or so.

Highway and around town figures if ya now what you get???? Or litres per 100 would be good.

Mine is getting 14L/100kms on flat road at 110kmph............

Dave

Link to comment
https://www.sau.com.au/forums/topic/177634-how-far-can-you-go/
Share on other sites

  • Replies 42
  • Created
  • Last Reply

Top Posters In This Topic

That's terrible fuel economy! I get about 400ks to a tank these days, but most people will say it all depends on how heavy your foot is!! Driving over to Perth from Qld I got about 580ks to my best tank, but my lowest has been just over 300. (Had 2 cruises in 2 nights hehe)

im lucky to see 300kms to a tank....!

highway i reckon i could just squeeze 400 out of a tank but i dont do that much highway... and i LOVE boost!

Try Resetting your ECU by disconnecting it and leaving it overnight... the ECU will self learn and possibly pick up your mods a touch better.... hence better economy.....

im lucky to see 300kms to a tank....!

highway i reckon i could just squeeze 400 out of a tank but i dont do that much highway... and i LOVE boost!

Try Resetting your ECU by disconnecting it and leaving it overnight... the ECU will self learn and possibly pick up your mods a touch better.... hence better economy.....

easier and quicker way is to take of ur negative terminal on the battery then hold down the brake peddle for about 1min (this just drains all remaining power out of the system) then put the negitive terminal back on, turn the car on and let it run for about 2mins on idle (this is auto adjust it as far as it can with stock limitations). This isnt gonna solve ur problem but it should help

Quigga

it really annoys me when people say "i got xxxkms to a tank". how many litres did you use? i can get an extra 50kms out of a tank by driving round for ages with the fuel light on. it doesn't mean i got any better fuel economy.

turbo dave: 14L/100km is pretty bad for highway driving. i got 10L/100km out of mine, but it was stock turbo. but then i would get 17L/100km round town.

have you tried changing your o2 sensor to see if that helps?

Im looking forward to fitting my 2835 to my RB20!

Highway driving is gonna be awesome! Well thats how im imagining it..... Since its gonna be a alot laggier than stock... So hopefully it will sit off boost @ 110 and be off boost in the city driving.

But thats an RB20 and yours is a 25.... Id be saying you could easily achieve more from that turbo with a RB25.... Im aiming for 260 with my RB20

I used to average 300km in my 32 IF i was lucky... Oddly enough the faster i went the less it would use..... Eg. 290km trip @ 110 had to refuel, same trip back @ 160km/h (1am in the morning) most of the way i still had almost 1/4 tank left

Edited by MADGT4

It really really depends on how heavy your foot is.

I was born with a lead right foot, so my car hardly ever sees over 300 to about 45 L.

With the bigger turbo, driving around town, it should be harder to get on boost, so if you're trying to drive economically, it should use less petrol. The stock turbo goes on boost at the lightest touch of throttle, or up the slightest hill.

But on the other hand, the bigger turbo, plus fuel requirements means that when you give it some, it'll use more fuel, because it makes more power.

So in essence.... It depends on how you drive it

I get 10L/100 always. Aftermarket map sensor based ecu.

Runs less on the F3 everyday to work.. but more round town... always fill up around the same time.. always 40-45 litres

Although might change when I pick it up this week... was on 263rwkw... is now on 300+rwkw... :)

*edit* I also tend to have a heavy foot.. occasionally.... maybe... :thumbsup:

it really annoys me when people say "i got xxxkms to a tank". how many litres did you use? i can get an extra 50kms out of a tank by driving round for ages with the fuel light on. it doesn't mean i got any better fuel economy.

well, i once drove my old manual 1.3L 16V Charade for 180km around the sydney metro area after the fuel guage touched the 'E' mark. it sputtered as i was driving towards a servo, i pulled in, and it stopped just as i pulled up next to a bowser, and wouldn't start again until i got fuel :thumbsup:

don't know exactly what economy that meant for the full tank, but it was in the 7L/100km zone

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

    • What does it look like with highway driving? And yes, I had a similar thought as Duncan. It looks quite similar in my Stagea and I have made myself accept it as normal. Might have to look into it some day  
    • While I was waiting for the new parts to come in for the charge pipe and radiator I decided to do some turbo modification. The drive pressure (exhaust backpressure) was a lot higher that I thought it should be. For 32lbs of boost drive was 55lbs. The turbine housing is a 1.10AR and my turbo builder has suggested to go to a 1.25AR. To test if a larger AR would do anything to reduce drive pressure AND not spend any money I decided to hog out the divider in my current housing. I removed it from the inlet and the whole way through the housing.  After reassembly and testing it doesn't look like this modification did anything for reducing drive pressure or requiring more fuel (making more power). Oh well, it was worth a shot. We'll get some data at the track if it makes it past the 60ft. I also machined a $7 shift knob off Amazon to fit my Stillway shifter since I didn't like the Stillway shift knob. Next on the list was the radiator replacement and fabrication of a new intercooler tube that had no silicon coupler. No pictures of this - I was short on time each night after work to get this done and didn't stop to take pictures.  Next was to get the clutch disks out and replaced. Previously when installing the dogbox I had ordered a set of the same sintered iron disks I had been running because I switched to the 26-spline input shaft. I thought it was odd that they didn't have any markings or brand name on them like all my old disks had but installed them anyway. At the track I could not get the clutch to lock up using my normal strategies. After two track nights I reached out to the clutch manufacturer and ask their thoughts. They said they had to switch the material out because they were having trouble getting the original material and that this new material would not take to being slipped very well.  So out with the first set of 26-spline disks and in with the correct material 26-spline disks. While I had the trans out I added an inspection/service hole. I've wanted one of these for a while. Now I can have a look at things and change the front cover shimming when needed (clutch wear). I hustled and got the clutch change done in a few hours on a Saturday. Hopped in the car and drove home. On the way home I did a 1-3 pull. When shifting from 2nd to 3rd the core plug in the back of the cylinder head popped out and dumped all the coolant. Thankfully I was only 30 seconds from home and coasted it there. Datalog showed nothing unusual and 2.5psi of coolant pressure. That plug has been in there since 1992 but I guess it worked its way out. Pulled the trans AGAIN and replaced the plug, JB welded it in, and made a brace. Also deleted the head drain I had added in during the bearing issue fiasco.  I am currently changing my boost control plumbing to make it cleaner. After that is done I'll make another attempt at getting past the 60.
    • Are you 100% sure this isn't tune related?
    • 140-150 across the board. At this point hoping the grounding harness fixes it. My grounds are all tied to the chassis and none to the battery. For SR and KA that’s never been a problem for me but had a few other guys here and Reddit who told me RB really like a very solid ground setup tied to the battery so going to try that next, I’m stumped if that doesn’t do it. Never had a car have spark and fuel and not fire off before. Only thing I can think is the spark is intermittent/weak because of grounds nothing else really makes sense at this point 
    • I am having close to the same issue. Can you help me with what wire you grounded to get your pump to trigger?
×
×
  • Create New...