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VS commodore, mods don't seem to be as effective as thought..

low vs

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It's pretty easy to do, in most cases just a matter of squirting in the injector cleaner. Google a how to and it will show you exactly how its supposed to be done, and the do's and dont's. Simply, the main purpose is to clean all of the built up additives that are left (and dry) on the injectors from the last bit of petrol left on them when you turn off your car. Also goes through and cleans everything connected to them.
It is supposed to give you better fuel consumption (if they're dirty/clogged), and increase performance as the injectors are able to inject the petrol out without having to push or force it to get through any build ups.
Also i've found that it makes the acceleration a hell of a lot smoother.

i think hes talking about the tank not injectors
 

sleepa

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The tank accumulates all kinds of crap over the years, and then when the tank gets low some of the crap gets sucked up into the fuel lines and injectors causing them to clog. The injector cleaner is only a temporary fix as it cleans the lines and injectors but the crap is still in the tank so it will get sucked up into the lines again. To clean the tank properly you really need to take it out.
I had an old car with a carby and the lines on that even got clogged up a few times.
 

peckzz

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You need a tune to suit the modification.

Im not guessing or making this up, I know this from experience.

My VR with worked heads and roller rockers drove pretty much the same as a stock VR, and the temp would shoot right up at high rpm (like 90 seconds from C to past H). But then Delcowizid stuck a wideband oxygen sensor in the exhaust, plugged some computers and stuff into the car and we drove around for a few hours. Then he went home and made me up a tune.

The result was ####ing impressive.


lol is this the vr you ran 1 genuin extractor and 1 home made extractor ?

lmfao
 

Patti2912

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Are you driving it around on lpg? Because with a mixer system it does have less power than petrol, Also they have to put the mixer ring in the air intake which makes it smaller so therefore less air into the engine and less power on both lpg and petrol. This could be why you feel it has less power.

I don't drive it on LPG too often, only on longer drives or if im low on petrol as i prefer it on petrol and am aware that it loses about (or at least) 10% power when switched to gas.
There's no power substitution when its duel fuel whilst running on petrol though, right? Just want to confirm.
 

Patti2912

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The injector cleaner is only a temporary fix as it cleans the lines and injectors but the crap is still in the tank so it will get sucked up into the lines again. To clean the tank properly you really need to take it out.
.

I was told by a mechanic that for the most part a good quality cleaner disintegrates the crap that builds up, therefor most of it gets pushed out once a full tank goes through. I was pretty sure that this wasn't correct but took his word for it seeing as its not a complex thing, but if he was incorrect he should lose his mechanics license.
 

sleepa

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I was told by a mechanic that for the most part a good quality cleaner disintegrates the crap that builds up, therefor most of it gets pushed out once a full tank goes through. I was pretty sure that this wasn't correct but took his word for it seeing as its not a complex thing, but if he was incorrect he should lose his mechanics license.

It might help a bit, but after many years if it hasn't been cleaned then it will get to a point where it really does need to be drained, but yours sounds like it should be ok.

I don't drive it on LPG too often, only on longer drives or if im low on petrol as i prefer it on petrol and am aware that it loses about (or at least) 10% power when switched to gas.
There's no power substitution when its duel fuel whilst running on petrol though, right? Just want to confirm.

They put a mixer ring into the air intake which constricts the air intake down a few inches which is actually a lot, in my old car it turned out to only allow about 2/3 or the air through after the lpg installation. Anything that stops air intake is bad, which is partly why when you are able to remove the MAF on LS1 cars it helps. You have gone the other way making more of a restriction even when on petrol. The cold air intake may help but at the most it will only flow about the stock amount of air.
 

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I don't drive it on LPG too often, only on longer drives or if im low on petrol as i prefer it on petrol and am aware that it loses about (or at least) 10% power when switched to gas.
There's no power substitution when its duel fuel whilst running on petrol though, right? Just want to confirm.

Have you thought about the weight of the LPG tank and all of its other components compared to a stock vr (without LPG)?
And with regards to the injector cleaner, IF it acutally does anything, it'll break up the dirt very small, but the way out (through the tip of the injector) is even smaller than what the dirt is, so its possible your injectors are blocked. I'd say have them removed and cleaned out properly or replace them with new.
 

sleepa

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Have you thought about the weight of the LPG tank and all of its other components compared to a stock vr (without LPG)?

Good point, I forgot about the extra weight, equivilant to at least another person in the car. My car was slower after the installation by around a second to the 0 - 100km sprint. And that was on petrol.
 

Andrew426

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lol is this the vr you ran 1 genuin extractor and 1 home made extractor ?

lmfao
lol nah mate this was with a pair of coby extractors into 3 inch with a flowmaster and a big resi. Sounds mean, but still quiet enough for a daily
 

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The engine management can adjust the ignition timing to suit the higher octane fuel. It can advance the ignition timing further when running on 98 octane fuel.The more advanced the timing can be run at,(to a point),the more efficient the fuel/air mix burns at,which means better economy and more power.I get around 6-8 litres per 100 km's on the highway,and around 10-12 in town on the 98 octane fuel.On the normal 91 stuff,this goes up to around 10-12 highway ,and around 14-16 around town.Ive tried all different brands, also the E10 stuff etc,which didnt seem any different from the normal 91 unleaded.Ive found the shell Vpower and caltex vortex 98 are both good to use and a bit cheaper than BP ultimate(where I am anyway).Ive found the BP ultimate doesnt run as good as the shell or the caltex stuff,dont know why that is.The above fuel usage is when running on the factory standard chip ,VSV6.



Here are some links to articles on octane rating v's fuel economy and performance noting that non supercharged Ecotechs are designed for 91 RON and the amount of energy contained in fuel is not related to RON rating.

Is High Octane Gas Worth the Money? | Wanderings

Octane rating - Wikipedia, the free encyclopedia

There are a lot of factors that can have an influence such as engine condition. For example if the engine has oil consumption issues or a faulty EGR valve these can cause pre ignition and in an Ecotech would cause the ECU to detect this from the knock sensors and retard the timing so switching from 91 to a higher octane fuel the car would probably run more efficiently but on an engine working properly everything I have read and my experience tells me there's no cost saving or measurable performance gain to be had using 95 or 98 fuels
 
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