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Supra Vs Gtr On Fuel Economy

Shidan

By Shidan,
in R Series (R30, R31, R32, R33, R34)

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Shidan Explorer

Shidan

Posted
Posted

Hi everyone,

I'm a supra owner but also a GTR fan.

For the far future i want to get r34 GTR, however, i've heard GTR's are bad on fuel.

I get 520kms on a full tank which is about 70litres. I was talking to a guy who had a r33 gts-t who said he only gets about 250 to 300kms on a full tank. If that's true i'm guessing GTR gets even worst milage.

I'm not sure if everyone is aware but because supra had a 3 litre engine some government co-opration (don't know what it was) in japan gave it trouble, so they had to make more autos and so forth, so because of that maybe supra put a lot of attention on making their car with better fuel economy. From my understanding GTRs and Gts-t's didn't get any trouble.

If a few GTR owners (especially r34) could tell me what milage they get and how happy they are with it, it would be great.

Thanks guys.

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GTR-N1 Grand Master

GTR-N1

Posted
Posted

Just did the Putty Rd Cruise with SAU + 2 runs down and then up Hawkesbury Hts to home.

After filling up before and after, the GTR fuel economy stood at "11.93l/100Km" !!!

Standard injectors and turbos but HKS ECU, HKS Induction, HKS 3" Exhaust, Blitz DSBC.

Hope this helps.

Talk to Benro_2 about his JZ

Tez

Shidan Explorer

Shidan

Posted
  • Author
Posted
Skyline + fuel economy = Shit

Skyline + my right foot + fuel economy = need a second job lol :cheers:

Haha really? you've got a r34 GTT? Sounds like GTR's are getting better fuel economy?:S

Apparentely TT supra's get better milage than NA supras. Good turbos help the fuel burn better.

Mayuri Krab Grand Master

Mayuri Krab

Posted
Posted (edited)

My auto R33 gets ~450km per tank & I would assume that manuals should only be getting better millage.

EDIT:

Apparentely TT supra's get better milage than NA supras. Good turbos help the fuel burn better.

Really? My parents were always under the impression that the main use of a turbo was to increase a cars fuel millage, now thats obviously not true, but maybe its not as complete of nonsense as I thought it would be with that info...

Edited by Mayuri Krab
Shidan Explorer

Shidan

Posted
  • Author
Posted

I did a bit of research, r34 GTR has a slightly bigger fuel tank.

According to this site it's got a 72 liter tank (http://nissanskyline.6te.net/GTR34_spec.htm)

According to this site supras got 70 liter tank (http://www.toyota-supra.info/models/1995_5/4519/)

So supra's still got better fuel economy. But Gtr's are faster.

GTR-32U Mentor

GTR-32U

Posted
Posted

I fail to see how a turbo car of the same model can have better fuel economy. NA is always better on Fuel. Turbo cars run lower compression than NA equivalent...The only instance i can think of where a turbo car would be better on fuel would be if it were a diesel....high compression engines will always have better fuel economy than Turbo unfortunately

WYTSKY Veteran

WYTSKY

Posted
Posted

my car is proof that turbos are better Depending on how you drive them, from n/a..

n/a used a lot of fuel to get up hills etc.. turbo just cruises...

used to get about 350-380 out of n/a

when I turboed with stock parts got 500km!

now, with bigger fuel pump/afm/injectors/turbo get about 400-450.

N1GTR Grand Master

N1GTR

Posted
Posted

Ive got one of each. They both chew through petrol like its the 1990's. If you're hard up for cash dont bother with either :)

If you're concerned about fuel economy get a shitbox as a runaround and keep the import for the weekend :blink:

Shidan Explorer

Shidan

Posted
  • Author
Posted (edited)
Ive got one of each. They both chew through petrol like its the 1990's. If you're hard up for cash dont bother with either :D

If you're concerned about fuel economy get a shitbox as a runaround and keep the import for the weekend :cheers:

You've got a Supra and a skyline?

Which one do you enjoy driving more?

I'm pretty happy with my Supra's fuel consumption though. It better than my old car which was a 1.8 litre eunos 30x.

I'm selling her though and me and my brothers are going to start investing in houses:P and when i get the money i'll probably ither buy a r34 gtr or a really good TT supra. I'm very young right now though i'll be okay with a crappy car.

I'm probably going to get a Daewoo Matiz so i can drive it as much as i want and not worry about Km's and fuel.

Some of you may laugh now, but i'm sure no one on this whole forum would want to mess with one of these bad boys:Pmatiz_gallery2.jpg

So i guess then its safe to assume that both supras and Skylines in NA dont run relatively high compression ratios 10.5:1 or anything like that then...?

Yeah probably, not too sure. I didn't know skylines came in NA.

Edited by Shidan
Bumblebee Experienced

Bumblebee

Posted
Posted

ROFL thats a bad boy alrite

i had one come into work and he wanted his head to be port n polished and a cam made up.. he also had his own CAI intake system that he made from PVC piping outta his gutters and a caved in K&N filter

very amusing.. u guys gotta see the insides of those motors... adorable :cheers:

from memory, the piston is like the size of the CAS on the rb motors hahah

RyleyMA61 Enthusiast

RyleyMA61

Posted
Posted (edited)

I also have both and the supra is better on fuel and more powerful- i attribute that to the supra being lighter (1300kg) and tuned better (has apexi gizmo). (only an ma61 supra- i can testify (weighbridge) a TT 6 speed supra JZA80 weighs 1480kg.)

the GTR has a mines ecu and therefore runs rich as f**k. they both have a similar compression ratio (8.5:1 ish)

as for the turbos are more/less economical debate, they are both.

what determines how much petrol is used is how much work (ie LOAD) is required for the engine to move the car and overcome restrictions (ie mass of the car, aerodynamics et al)

a turbo with more TORQUE (remember torque is what moves the car, and power is simply torque x rpm) than the equivalent n/a will use less fuel under cruise and light load because it requires less torque(and therefore fuel- remember an engine is *really* just an air pump, and will be under less load) to move the mass than the n/a equivalent. modern turbo engines tend to run higher compression and less boost because of this.

under heavy throttle though, turbos will drink more because of the power!

have a look of a typical ECU's fuel maps against manifold pressure- the results speak for themselves!

Edited by RyleyMA61
Shidan Explorer

Shidan

Posted
  • Author
Posted
I also have both and the supra is better on fuel and more powerful- i attribute that to the supra being lighter (1300kg) and tuned better (has apexi gizmo). (only an ma61 supra- i can testify (weighbridge) a TT 6 speed supra JZA80 weighs 1480kg.)

the GTR has a mines ecu and therefore runs rich as f**k. they both have a similar compression ratio (8.5:1 ish)

as for the turbos are more/less economical debate, they are both.

what determines how much petrol is used is how much work (ie LOAD) is required for the engine to move the car and overcome restrictions (ie mass of the car, aerodynamics et al)

a turbo with more TORQUE (remember torque is what moves the car, and power is simply torque x rpm) than the equivalent n/a will use less fuel under cruise and light load because it requires less torque(and therefore fuel- remember an engine is *really* just an air pump, and will be under less load) to move the mass than the n/a equivalent. modern turbo engines tend to run higher compression and less boost because of this.

under heavy throttle though, turbos will drink more because of the power!

have a look of a typical ECU's fuel maps against manifold pressure- the results speak for themselves!

Great explanation!

That what i imagined, turbo's would use less fuel under cruise cause they have more torque.

Which supra do you have?

I thought supra's would be more heavey than gtr's, well mk4 anyways.

RyleyMA61 Enthusiast

RyleyMA61

Posted
Posted
Great explanation!

That what i imagined, turbo's would use less fuel under cruise cause they have more torque.

Which supra do you have?

I thought supra's would be more heavey than gtr's, well mk4 anyways.

hey buddy i've got an ma61 supra (mk II) with a 7mgte turbo. good fun! just blew a headgasket so gotta fix that.

turns out the ma70/jza70/ga70 (mk III) are the heavy bastards. nearly pushing 1700kg some of them. i know they went to ridiculous lengths with the jza80 (mk 4) to save weight- hollow carpets and crazy stuff like that. they do look heavy, and everyone seems to think they weigh a lot but really they aren't too bad!

;)

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