Another Alloytec performance-related thread

[Milky2106]

Hi guys,

I'm looking at improving the performance of my 175 Alloytec.

I'm not looking for huge numbers and an empty back pocket once i'm finished.

Just a nice overall package, that includes improved acceleration off the mark, and more power through the rev range.

I've got a bit of money to spend and am just wondering how you think a combination such as the one below would improve the performance of the V6.

- Already got exhaust, (twin 2.5' exhaust to Y-piece, to single 2.5')
- Extractors, would cats definitely be needed?, or is 'opening up' of the stock ones sufficient?
- Bigger injectors, 440cc??
- CAI, Growler item, etc?
- VCM Tune, torque management removal/modification etc, at a place such as Castle Hill Exhaust?

From what i can see this package should improve the overall performance of the engine as a whole,

More efficient Fuel delivery (bigger injectors) +
More air intake (CAI) +
Re-tune to tie it all together +
Extractors to f*&% off all the bad shit once it's done

=== Significant power increases?

If i'm incorrect or wasting my time, please... I'm open to opinions or suggestions,

but NO 'Get a V8' suggestions please, I'm only 19, so Insurance costs and bans on V8's for P-Platers make them a waste time for me at the moment. (As much as i would LOVE one)

Cheers,


Milky2106

[soop]

You're basically wasting your time and money.

Do the suspension mate. Heavier springs and shocks with some dirty big fat sway bars. Urethane bushes with good tyres. You'll transform the car, and if you keep it all you can transfer it to an SS later

[VZ_commo91]

If you want some better off the mark punch, get some 3.9 or 4.11 diff gears. In my opinion bigger injectors are a waste of time.

[Milky2106]

Thanks guys, anyone else??

[soop]

Whats your budget?
If you want some noise and a LITTLE more go, hit up a pacemaker system.

If you're going to do it, do it properly don't skip buy using second rate products.

[WogBoyz]

Id just do exhuast cai and tune, that will get it moving a bit better, but dont expect massive gains, im not sure if u can the cpr6 manifold for the 175kw engine but may b something else to look in if your really keen

[soop]

I wouldn't waste money on a CAI frankly. Just leave it standard.
Do the exhaust and a tune, replace the pipe going from the airbox to the TB to open up the flow a little. You might get a little extra throttle response. CAI is slightly pointless IMO. (Guaranteed there's about 30000 people on here that are going to jump to the defense of their beloved flexy pipe)

[06Calais]

Hi All. Im looking for some advice on Injectors for a Standard Alloytec 190. My current Stock injectors are making some noise. Pretty much a clicking type sound. when I bought car @ 72,000 km there was no noise. Then there was a little, it sounded like 1 injector. now its sounds like there are maybe 2 or 3 injectors making noise. I ran some Injector / carby / fuel system cleaner and it reduced the noise a little. I should mention also that I have a rough idle, even with brand new plugs and have lost some power in recent months. Not much but im sure I may have lost around 10 to 20 kw. I hoped putting new plugs in would have helped but it made little to no difference. But the fuel system cleaner seemed to work great. So now I want to replace Injectors. I looking for reliability more than I am looking for more fuel flow. i think the flow of stockies will be fine for now. Im just more concerned about reliability. ill worry about higher flow when I do heavier mods and tuning.

[one_and_only2004]

The only time you'll need bigger injectors is if you go forced induction - it's a waste of time otherwise. I'd suggest getting either a set from holden or a set of cleaned second handers.

[VZ_commo91]

List for more power should at least go like this.

Exhaust ( full ) > CAI > diff gears > ( maybe CPR6 manifold and some manifold insulators ) > 20% underdrive pully > Tune.

tune is the last thing you want to do. just always remember that part, the rest doesn't matter in what order. Just tune last.

[one_and_only2004]

I agree with the tune being the last thing, but I'm with Soop - don't go chopping up your standard air box, all you'll gain is an annoying hissing induction noise.

If you're going to do anything, the tried and tested path is extractors, opened up stock cats and a twin 2.25" (your 2.5" twin setup into single 2.5" will do fine) then a set of diff gears.
CPR6 manifold is 'hella crazy expensive for the gains you achieve, and so is a tune.

[Munz]

Hi All. Im looking for some advice on Injectors for a Standard Alloytec 190. My current Stock injectors are making some noise. Pretty much a clicking type sound. when I bought car @ 72,000 km there was no noise. Then there was a little, it sounded like 1 injector. now its sounds like there are maybe 2 or 3 injectors making noise. I ran some Injector / carby / fuel system cleaner and it reduced the noise a little. I should mention also that I have a rough idle, even with brand new plugs and have lost some power in recent months. Not much but im sure I may have lost around 10 to 20 kw. I hoped putting new plugs in would have helped but it made little to no difference. But the fuel system cleaner seemed to work great. So now I want to replace Injectors. I looking for reliability more than I am looking for more fuel flow. i think the flow of stockies will be fine for now. Im just more concerned about reliability. ill worry about higher flow when I do heavier mods and tuning.

06calais get your car to someone that can check the injector cycle and power ie tuner with a dyno they should be able to work out whats wrong before you faulk out big money for injectors

[jezz736]

I agree with the tune being the last thing, but I'm with Soop - don't go chopping up your standard air box, all you'll gain is an annoying hissing induction noise.

If you're going to do anything, the tried and tested path is extractors, opened up stock cats and a twin 2.25" (your 2.5" twin setup into single 2.5" will do fine) then a set of diff gears.
CPR6 manifold is 'hella crazy expensive for the gains you achieve, and so is a tune.

A tune makes all those mods worth it though. Its also the one mod on that list that will give u the most gains.

[one_and_only2004]

A tune makes all those mods worth it though. Its also the one mod on that list that will give u the most gains.

No, that's diff gears.

[VZ_commo91]

Matt stoker ( or what ever ) in browns plains told me himself that the tunes for the alloytec are a waste.... He said he will gladly take my $1,000 But I will drive out of there thinking * why did I just waste my money on this? *

His exact words.

If I tune was only $500. I would do it, as its only small gains for the big price.

[06Calais]

hi all, thanks for the advice, But... I dont think I worded my post as well as I could have.

I dont want to get bigger injectors than standard, I just want something more reliable and perhaps quieter. I can see how I may have been miss understood though, so sorry about that.

Im no where near ready for major mods and tunes, however a tune is starting to look almost a necesity. Anyway I was hoping that there maybe a good after market brand of injector with the same or very similar flow rates to the standard ones in there now. The reason I dont want to upgrade to higher flows is because of the very same reasons mentioned above.

Im hoping maybe that there are injectors with the same flow rates as standard injectors but perhaps ones that atomise the fuel better, a better spray pattern, and therefore possible better burning and fuel economy. Stock ones are not too expensive, so I dont mind. Or is it the case that GM - Alloytec Injectors are already at the pinnacle of Injector technology and therefore after markets (with the same flow rates) can not be made better, last longer, or cause fuel to be burnt better?

A few days ago I bought some more Fuel system cleaner that one bottle will do two 75 litre tanks. I put the whole lot into 50 litres and the noise has gone. Last time it just reduced the "clicking sound" this time the "Clicking sound is gone"

In fact even if there are no injectors available in the specs I am asking, is there any better fuel filters available than Stock or Ryco. I need a fuel filter, and Im looking at buying a Ryco from Super Cheap. Ive not ever had a car as nice as my Calais so for one, I want to buy good reliable parts, but secondly im not necessarily looking for more power (of course that's a nice bonus) just reliability and perhaps better economy, and maybe for less money than Stock Parts.

I chase thunderstorms across vast un-inhabited distances so I really want reliability and economy.

In fact the first big $$$ Ill be spending will be on bigger brakes and suspension mods, and even with suspension, im looking for toughness more than performance increases, though of course any increase in performance while seeking reliability is most welcome.

So yeah, I totally agree with the comments above re: bigger injectors etc. Those sort of things need to be added in a total package.

In fact this is prolly not the right thread for what I am asking as we are in a performance mods thread. I should find / Start a reliability durability thread.

So if you guys could just give me another chance to access your knowledge I would be most greatfull.

[jezz736]

No, that's diff gears.

In this instance I'm talking about power gains which is what a tune is for, I'm lead to believe that the more mods done, the more gains you can achieve with a tune. I'm aware that torque should be what your after and i agree and that's what a taller set of gears will achieve. Ive done this to my car and definitely a good mod to do. As for the tune I'm just going off here say. reading through this site it seems that a lot of people feel they got their money's worth out of a tune.

[tunner]

paint ur ride red. red goes faster. winning!

[06Calais]

Please bare with me on this question I have, but when you install an OTRCAI obviously it has no MAF anymore. What is the result of that? i mean like how does the ECM or PCM cope with there not being a MAF anymore? Obviously its doable coz people are doing it. i was wondering on a technical level how this is worked around. I mean is it just a matter of when re-programing the ECM or PCM to make it learn to liove with out the MAF Im really trying to learn about my Alloytec. My whole life I have had only older technology so its quite a big jump for me considering I have only ever owned Cars with Carby's and the one that did have injectors was only CFI not MPFI. Any education on the matter would be most appreciated.

[richardpalinkas]

the otr for the alloytec has the maf still in place, its directly in front of the throttle body. as far as im aware there is no otr available for the alloytec except on ebay, which is not exactly an otr, as it snakes around

[Fishman88]

Ive played around with my alloytec190, been there done that n really save your money n get a LS1 u will spend less n get alot more go but use more fuel obviously n they somewhat cheaps these days. Dont waste your money on injectors!! with cai just whack a k&n panel filter.

[richardpalinkas]

even that, just throwing a k&n air filter will do nothing except be a reusable filter as the stock ones flow well enough to allow the engine to breath easy enough. think about the flow through the airbox, not exactly ideal for performance...

[Hicomp]

alloytechs make a fair bit of power! More then the old clubsport 185i, but still a nugget. No matter what motor your not going too make massive power without spending money, so no matter a v6 or a v8 theres only what 60 kw difference when they come out? ss 270kw alloytech 210, espessially with the ss at the weight of 1800kilo. Diff gears will make your car's 0-100km/h time much quicker and having a solid flywheel in there will make it rev alot more freely, N/A cars suck unless you want too spend big bucks.