VZ SV6 CAMS and CAI?

[IMPULSIVE VZSV6]

Hi guys..

I have an sv6 vz, goes pretty hard with extractors and 2.5" Exaust. havnt done much more other than put in a K&N Air filter... But just wondering if anyone has put in bigger cams? the local experts down this way(tassie) say they've never really worked on alloytechs let alone put bigger cams in so is this possible being quad cam? If so is it really worth the money? And Is a CAI really worth the money(5/$600) on a V6? when the 2 hole mod could possibly be just as sufficient? thoughts anyone??

cheers

[impulsive]

It really depends on what you want from your car mate, if you want the very most out of your alloytec and your willing to spend big, then i say go for it.. but you will need a large wallet and a big set of bollocks to back your wallet up.

There is a lot of power to be made and found out of alloytec's, a lot of people here will discredit and bag the alloytec, mainly V8 owners who think power is in Litres, little do they realise a lot of the supercars are running V6's that go faster then the LS1 backwards. Much to dissapoint them also, but there are some 4 pot screamers out there that eat LS1s aswell.

Cams, as expensive as they are, have made significant changes to motors out there, see Peformance manifolds ute. It is definately possible, but as i said earlier, you need the wallet to back it up.

Cold air intake is sceptical on standard block's, with no other mods. You may notice acceleration improvements or responsiveness changes. But ultimately it is really only a supporting mod, much similiar to an exhaust. The big power is in head work, tuning, and forced induction at the moment for the alloytec.

For the best imporvement see forced induction or speak to Phil at peformance manifolds, his alloytecs were off the chart, spinning upwards of 9000rpm if i remember correctly.

These are my thoughts from a few years of owning an alloytec and seeing what others and myself have done. I'm sure some will contest or agree with me.

Best of luck

[DI.57.BD]

if you want to go turbo look up Proflow performance they make a turbo kit to suit the alloytecs, there demo car was putting out about 280rwkw if i remember.

EDIT- its only a single kit seen a twin kit else were.

[impulsive]

if you want to go turbo look up Proflow performance they make a twin turbo kit to suit the alloytecs, there demo car was putting out about 280rwkw if i remember.

Twin or single?

[Not_An_Abba_Fan]

As I have always said, the alloytec is a high revving engine that loves to breathe. The sooner people realise it's not a Buick, the better off everyone will be.

[impulsive]

As I have always said, the alloytec is a high revving engine that loves to breathe. The sooner people realise it's not a Buick, the better off everyone will be.

amen to that!

[torana355]

As I have always said, the alloytec is a high revving engine that loves to breathe. The sooner people realise it's not a Buick, the better off everyone will be.

Are you talking in relation to exhausts or the motor in general? I know they love to rev as CHE raise the rev limit to 7k when they do the VCM tune mine made power all the way to 7k. I recon with cams and headwork they could easily rev to 8k+

[impulsive]

i dare say his comment has nothing to do with exhausts.. wierd for you abba...

[IMPULSIVE VZSV6]

Cheers guys for the replys,
well impulsive as for the cams they can wait.. my wallets not that full at the moment hehe

The alloytechs love to breathe indeed.. although i went the original euro 3 cats obviously as the standards are too big to fit under the car plus hearing alot from people high flow cats dont sound the greatest plus the alloytechs love back pressure... if i was to ever supercharge the vz then high flows it would be but im not sure id notice any difference with high flows other than a raspy loud noise. Thats what the local pacemaker dealers told me anyway aswell as the exaust specialist.

What cats do you have Impulsive?

[Not_An_Abba_Fan]

Are you talking in relation to exhausts or the motor in general? I know they love to rev as CHE raise the rev limit to 7k when they do the VCM tune mine made power all the way to 7k. I recon with cams and headwork they could easily rev to 8k+

Haha impulsive....but yeah, the engine in general. I have heard a lot of good things about the potential of the alloytec and what can be achieved with a bucket load of coin. Also, once the restrictive exhaust is taken care of it goes better as well lol.

[richardpalinkas]

my car surprisingly makes 315rwhp with standard manifolds, twin 2.5 cat back and raptor supercharger. keep an eye open for things that pop up on the market, you may get a steal. its not so much as to whats available that makes these cars a pain, its the tuning side of things, which an aftermarket computer may help.

another interesting thing, i went for a drive in an older holden, cant remember model, but it had an ecotec in it, standard untouched, custom exhaust and custom air intake with an aftermarket computer and 3.9 diff gears. that thing flew, it felt quicker than my mates vs that runs 13.1. essentially where im heading with this is that i think that if you set your money asside for an ecu, you could do wonders with the alloytec unopened

[torana355]

Also, once the restrictive exhaust is taken care of it goes better as well lol.

Yeah i think the extractors are the main bottleneck, i just had my catback done and there is almost no difference in top end power and a small loss is down low torque, im sure the extractors will help with scavenging/bottom end torque aswell as giving the top end a nice little boost.

[Stewlz]

Proflow do a single turbo kit, if you watch the YouTube clip it sounds like a 747 at idle. By the way toranna335 what sort of exhaust did you get?

[kuzman89]

Mace eng. (forum sponsor) are a few weeks away from releasing a cam for these motors.

[torana355]

Proflow do a single turbo kit, if you watch the YouTube clip it sounds like a 747 at idle. By the way toranna335 what sort of exhaust did you get?

A custom 2.5" single catback from Castle Hill Exhaust. Its a dyno proven setup but it needs extractors to get any real gains as the factory headers are very restrictive.

To the OP, im going to get a MACE CAI in the next few weeks, everyone has good things to say about it. I also installed some MACE manifold spacers today but i have not driven the car enough to see how they affect the cars performance.

[ashbox]

i will admit, i do have a soft spot for my old sv6, and if i had the money, i would've gone down the s/c road but alas, i didn't so bought a v8 instead..
i'd love to see what someone could do with one of these motors

[impulsive]

my car surprisingly makes 315rwhp with standard manifolds, twin 2.5 cat back and raptor supercharger. keep an eye open for things that pop up on the market, you may get a steal. its not so much as to whats available that makes these cars a pain, its the tuning side of things, which an aftermarket computer may help.

another interesting thing, i went for a drive in an older holden, cant remember model, but it had an ecotec in it, standard untouched, custom exhaust and custom air intake with an aftermarket computer and 3.9 diff gears. that thing flew, it felt quicker than my mates vs that runs 13.1. essentially where im heading with this is that i think that if you set your money asside for an ecu, you could do wonders with the alloytec unopened

do you really believe dyno's though rich? They can be setup to achieve higher then normal results to make the workshop look good... remember that. Terry was right about the ECUs but there are other problems with that

[Not_An_Abba_Fan]

A single 2 1/2" is probably the worst exhaust you can put on the alloytec. The bottle neck is actually the merge at the Y pipe. Take the exhaust off at the cats and do another dyno run, you will pick up at least 5 kW.

In fact any exhaust is a restriction as far as peak power goes. But we all know power is just a pissing contest. The real figure is the torque and how long the curve is.

Extractors help getting the exhaust out of the engine, but a well designed system will keep it flowing as fast as possible. Manta dyno tested their system too, but power was never an issue, they focussed on torque. The twin 2 1/4" into single 3" works because the merge into 3" actually speeds up the exhaust flow due to the pressure differential between each pulse as it enters the merge from each 2 1/4" pipe.

Having said all that, the best exhaust will never work to it's optimum level if the intake and fuel delivery isn't enhanced as well.

[torana355]

A single 2 1/2" is probably the worst exhaust you can put on the alloytec. The bottle neck is actually the merge at the Y pipe. Take the exhaust off at the cats and do another dyno run, you will pick up at least 5 kW.

This is starting to get off topic but Castle hill Exhaust actually tried every combination and the Single 2.5" gave the best power, torque and sound. Mind you the way they design their exhaust may be different to the way Manta set theirs up. The only way to see which is better is to do back to back dyno runs with the Manta and CHE setup Chances are there would be stuff all difference, especially on an unopened alloytec motor.

[Not_An_Abba_Fan]

Without having seen the CHE set up, I couldn't really comment. Any chance of taking a picture of it? I'm curious as to how they are made now.

[torana355]

Without having seen the CHE set up, I couldn't really comment. Any chance of taking a picture of it? I'm curious as to how they are made now.

There is a whole set of pics of a setup exactly the same as mine on the CHE facebook page.

[MACE]

Cams soon

[impulsive]

from that i take it mace is engineering alloytec cams? More info?

[Macca86]

Yes yes. More info on the cams??

[Stewlz]

On a scale of 1 to extremely illegal, how illegal will it be for a p-plater to drive a cammed alloytec