vy v6 in a vz for fuel economy

[holdenvtman1123]

i wanted to query putting a v6 3.8lt motor in a a vz. purely for the fuel economy. would it be cheaper to downgrade rather than modify??

[acarmody]

Wow that would be a waste of a VZ. Definately cheaper to get a VT-VY, would be WAAAAAAY to much work to put a Ecotec in a VZ. My brothers VZ SV6 has better economy than my VX V6.

[DanVG]

Don't really know much about the legal or mechanical side, but I imagine it would take a long time for and fuel saving to cover the cost of the conversion.

[BoNeZ-01]

An Ecotec is cheaper to run than an Alloytec?

[svsex]

ive drivien a vx v6 for a couple years and i cant say its better on fuel in anyway compared to the alloytecs, the 3.8 is probably better for towing, more low end torque, but IMO ur wasting a lot of time and money on doing what u want, if ur goin down that path just buy a pulsar, ours does great on fuel haha

[VzVzVz]

Well you're way off the money in saying the 3.8 is more efficient than the 3.6. How can an engine with a higher capacity and earlier technology be more efficient than a smaller engine with later technology? It doesn't add up.

Sure, the ecotec was more environmentaly friendly because it had EGR equipped, but saying that it's more efficient than the alloytec is silly.

Plus, why bother convertint the engine when the VZ is practically the same car as the VY. The only real difference is the engine. Just trade it for a VY if you really want an earlier engine.

[svsex]

Well you're way off the money in saying the 3.8 is more efficient than the 3.6. How can an engine with a higher capacity and earlier technology be more efficient than a smaller engine with later technology? It doesn't add up.

Sure, the ecotec was more environmentaly friendly because it had EGR equipped, but saying that it's more efficient than the alloytec is silly.

Plus, why bother convertint the engine when the VZ is practically the same car as the VY. The only real difference is the engine. Just trade it for a VY if you really want an earlier engine.

haha smartest thing i heard today

[holdenvtman1123]

Why do i only get 650 km a tank from my vz and i was getting over 800km with vt-vy? also at redbook it says that the ecotec uses less fuel than the alloytec? also i read on here the timing gear will need doing around every 150k km or major engine damge could occur. this cost is $700 just for the parts. not to forget the extra cost for the correct engine oil versus an alloytec. to change plugs u have to take the inlet manifold off, the thermostat is harder to get to than hose a back hose on a camira. a laggy throttle doesnt help. i cant wait to downgrade my vz 07 exec to a more optioned vy with the ecotec.

[VZ_SS]

Mate, i think that if you are that worried about fuel economy, perhaps you might need to look around for a smaller car as a daily driver. V6 commodores, ecotec or alloytec, are pretty good on fuel in the grand scheme of things. Just my 2 cents.

[impulsive]

Why do i only get 650 km a tank from my vz and i was getting over 800km with vt-vy? also at redbook it says that the ecotec uses less fuel than the alloytec? also i read on here the timing gear will need doing around every 150k km or major engine damge could occur. this cost is $700 just for the parts. not to forget the extra cost for the correct engine oil versus an alloytec. to change plugs u have to take the inlet manifold off, the thermostat is harder to get to than hose a back hose on a camira. a laggy throttle doesnt help. i cant wait to downgrade my vz 07 exec to a more optioned vy with the ecotec.

1. Over 800km from a 60L Tank, to save everyone the maths, that would be 7.5L per 100km (working on 800L) which i can get on the highway in my SV6. If you can get that around town then im going to go get a VY!!

2. Where did Redbook gather this information? Which car was the test, how was it tested. (i think they are shit)

3. If you have to replace a timing gear for $700 as opposed to $5000 at least to convert a motor, which is more trouble prone (harmonic balancer) oil leaks and not to mention if you going reco, who really knows what the motor has been used for.

4. 10 min job (prob a lot easier then on a VY)

5. Change the thermostat? 100,000km plus and it hasnt been an issue.

6. Try getting a tune, or some work

7. What more options are there in a VY (similiar car, newer more powerful motor)

I honestly think you are kidding yourself both ways, VZ are a far more superior car, and alloytec is a far better motor (get a blower, it will solve all your problems). Thats my opinion, hope it helps

[WogBoyz]

been driving my dads vz sv6 with exhuast and cai and i must say i much prefer and ecotec over a alloytec in saying that i deff wudnt bother putting one in a vz tho

[ephect]

forget the cost of conversion, its illegal to put an older engine and a newer car that it didnt come out in.

if u really want an ecotec, buy a vy..

[shozzy]

moght be able to get a better exhaust note from an ecotec if you like the sound of a fart rumbling in your ear all day, but the alloytec is definitely the better engine for fuel economy

[wortus]

From what I have read the alloytecs while on paper a superior engine there is not much of a noticable difference unless you have the 190Kw version. I have a VY and it usually gets around 10.5 to 11.5 L/100km around town and recently got 7.5 L/100km on a highway run
which is probably about as good as a VZ but fuel economy has a lot of variables.
Apart from the engine the 2 cars are almost the same except the following;
4 speed auto in a VZ has more shift points programmed in and changes a bit better.
Front suspension changes to sway bar link pins removes the troublesome rubbers from the top as well.
VZ has auto start, no need to hold the key in the start position.
Some VZ models have electronic stability control.
There is an improved braking system.

So to sum up unless a VZ has all the extra things like ESP and is a 190Kw it is not that much better.

[SMURFTEC.]

i wanted to query putting a v6 3.8lt motor in a a vz. purely for the fuel economy. would it be cheaper to downgrade rather than modify??

as mentioned, in NSW it's illegal to put an older engine in a newer model car, ie, you could put a alloytec in a VY but no ecotoec in a VZ, you could put a VE alloytec for it to be legal, but whats the point?

[holdenvtman1123]

something drastically wrong with my vz as i am only getting 10.5 Lt per hundred on the highway.

[wortus]

something drastically wrong with my vz as i am only getting 10.5 Lt per hundred on the highway.

Checked your air cleaner?

[holdenvtman1123]

going to change the plugs and see if that helps

[Trevor 062]

something drastically wrong with my vz as i am only getting 10.5 Lt per hundred on the highway.

That's basically what I am getting to in my wagon..

[Danoz]

Dumbest thread ever.

[sweefu]

I agree with you there mate this is insane

[naf33n]

i live in london and constantly have to tell people "that is the dumbest shit i have ever heard" but you sir take the cake you have less intelligence then anyone i have worked with in london....... london is smarter than you

if you like he ecotec, sweet get a VY, if you like the alloytec get a VZ, pretty simply champ

[W45H1NGT0N]

lol this is funny this time last year when i had my vz acclaim we did a trip from perth to kalgoorlie which is about 800Km. We got there on a tank of fuel and just made it to the servo in town with 20km left on the distance to empty and same on the way home. If you dont flog the living crap out of them there a very reliable and fuel economical car.

[showxpony]

I doubt an ecotecs more fuel efficient then an alloytec. I do 80% freeway and my alloytec averages 7L/100km... local driving is like 9/10L/100km... i dont think an ecotecs better than that..

[holdenvtman1123]

there are many people on this site that are not very smart if thats the case . too many threads to list here of people complaining of the crappy fuel economy. time to create a thread on peoples average fuel usage. can someone point me to a site that shows accurate fuel usage for the alloytec. as for saying im not very smart....... grow up....