Toyspeed.org.nz Message Board

When modifying a car for increased horsepower, are you more conserned about "how much horsepower is it going to make?" or "how much is it going to cost to run?"

Poll is for fuel cost only, not maintainence eg; oil changes, warrent repairs

I select that I want both.

But I know it would never happen

i have two cars, three if you count the aristo, so have the luxury of choosing either. from a modifying point of view though, more after horsepower/reliability over economy, mainly because the supra isn't a daily driver mind you it's not even a weekend driver atm, waiting on suspension work to be finished

If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

i assume your talking about when the cars idling or foot isnt flat
horsepower, company van and fuel card FTW

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

I laughed so loud I pee'd a little. And of course wept when I realized that my Nissan burns 60 liters of avgas per hour.

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

Please go home.

Thank you, come again!

Depends how often you use the car?

For me I have the turbo ae92 which gussles when being thrashed but don't use it everyday or even weeks on end so it doesn't matter. Or the landcruiser with 3.8 holden petrol motor which gussles especially when 4wd'ing in Low Ratio, but its just a toy and wouldn't ever use it to go on a trip or anything. I plan on fitting a supercharger to the Landcruiser too

Then there is the gf's 20v, which has good consumption and is standard. So we use that all the time.

Spose this poll should have been for people who only have one car?

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

So long as you don't use the extra power at all, or have cams/porting which compromise you cars engine efficiency at cruise revs, and so long as your ECU is able to keep a good handle on your new fuel system at low flow levels if you have upgraded that?

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

HAHAAHAH Yea right!

Please explain then how my supra now only manages 250km off 60L of fuel and when I bought it it was doing aroun 450km off 60L.

Py7h0n wrote:

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

Steve

HAHAAHAH Yea right!

Please explain then how my supra now only manages 250km off 60L of fuel and when I bought it it was doing aroun 450km off 60L.

Clearly because you have modified incorrectly, according to some people if you tune it properly. You can have 600hp and use no more petrol than standard...cause its tuned properly...

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.

That's only if you fit a water to Hydrogen kit, a micro compressor and overclock the ECU

All joking aside, while it is possible to increase power and also reduce fuel consumption at the same time, the only way to do this that I know of is to replace the stock ECU with an aftermarket one, tune it leaner and spend a long time finding the correct injection timing that give the best economy. After that is done any increase in HP will result in more fuel being used.

Economy FTL. The ZX is getting 5km/L

I barely get a shade under 7km/l in my BA falcon stock. 400 km from 60l. Mind you this is lots of cold trips and all about town driving. I try to nana it but the noise the dual vct makes is too nice at higher revs! Besides if I was overly worried about economy I wouldnt have bought a 4litre straight 6 car!

The mrs caldina gt doest fair much better, but she can be quite lead footed with it. Very on(to the fire wall)-off. Need to teach her to nana it a bit better. Probably doesnt help that whenever I drive it I keep it revving high, as a beams motor should.

The economiser of the bunch is my prject car. Uses no gas, at all, whatsoever! It doesnt even move!
When I bolt everything back up I will check how thrifty the 2e motor is before it gets replaced by the blacktop...eventually.
At high school it used to live off 10-15 a week in gas, at 30 kms a day. Petrol was about 90c/l then though

xsspeed wrote:I barely get a shade under 7km/l in my BA falcon stock. 400 km from 60l. Mind you this is lots of cold trips and all about town driving. I try to nana it but the noise the dual vct makes is too nice at higher revs! Besides if I was overly worried about economy I wouldnt have bought a 4litre straight 6 car!

My JZS147 is probably about the same, but i also have a heavy foot . The auto PWR button is always on lol I expected that a 2 tonne 2JZGE powered beast would cost alot

I'm with steve on this one if you have a well tuned ecu you can get some pretty decent economy, my car isn't huge power (240 rwkw) but i still see 13km/L without trying to drive it easy, and I know of a few hard tuned evos returning better economy than an equivalent unmodified model.

Even at pukekohe in my starlet doing 1:12's it was returning 10-km/litre,
it should be even better with the taller diff.

mjrstar wrote:my car isn't huge power (240 rwkw)

Until you mention it's a Starlet, then it's nuts!

MAGN1T wrote:If your car is tuned properly then your mods won't increase the fuel consumption.
Steve

I raised the compression in my engine, put bigger cams in, and kept the stock ECU, so it is a little leaner and cruises on the road a little more economically than it was, but when i'm being a lead foot it drinks the gas way worse than it ever did.
Generally more power = more fuel use, unless the thing was running really rich in the first place.

Aftermarket ECUs are a downgrade.

Good for a wind up, you guys are easy.

Steve