The Ultimate Alloytec Performance Thread

Just picked up a twin 2.5 xforce exhaust catback of a VT wagon, I hope it fits on my WL caprice.

Anyone tried a twin 2 1/2 catback on their 6cyl 3.6L VZ or heard one on an alloytec?

 

It will fit, but you will have to extend the tail pipes as well as the arse end of the WL is longer than the wagon.

It will sound like poo though.

 

I have a twin 2.5, most of my mates say it sounds pretty good, and not loud. Although I still have standard cats and manifolds. Search YouTube impulsesv6, he has a few vids of his exhaust change from a single 2.5 to a twin 2.5 xforce

 

Yea I heard about having to extend the rear muffler pipes.

I might give it a shot, bolt it on and see how it turns out to sound.

After lots of reasearch half say it won't sound good and will drone other say it sounds mint.

Cheers
Dave.

 

Legend, thanks for that
I'll have a look at em when I finish work tonight at midnight.
Dave.

 

Also check my drag videos, you can barely hear my car compared to the others I race. Just search my user name in the tube

 

just wondering if anyone can shed some light
''Our latest dyno tests resulted in 422hp at an astonishing 8750rpm using ported heads, aftermarket camshafts and a free-flowing exhaust. In this test, the CPR6 added a whopping 161hp.'' does anyone now how much or who can port heads and get aftermarket cam shaft

 

That would be performance manifolds that does that package. Although they use a motec ecu to run that engine. Mace are currently making cams though

 

Hey there, really new to the forums...hoping not to piss anyone off with this post

I've got a SVZ with the standard alloytec, just wondering what mods people have done, whilst keeping it NA. What sort of power numbers are realistic with this engine? I have had some people telling me to leave it alone, some people saying you can get good figures with the alloytec and someone even described it as economic suicide....

From what I can see the CPR6 is pretty much a standard...

any advice is much appreciated

rock on,
Jimi

 

A nice CAI and cat back exhaust is a go'er. Maybe some Mace manifold spacers. There's nothing like a good old oil change with some real decent oil and spark plug change. Clean the MAF and when you do the spark plugs/manifold spacers clean the throttle body out and the manifold. Should run pretty good if you do all that.

 

True, although a CAI and exhaust are not. Bosch double plat plugs, a fully synthetic oil (if you can afford it) OEM air filter and oil filter if your not going the CAI way, also make sure you use actual MAF cleaner to do the job of cleaning the MAF and a can of carby cleaner to do the manifold.

 

Cheers guys, what sort of power are most people getting from their alloytecs?

Any idea what is realistically possible?

 

Considering it is only a 6 and I'm hauling around a wagon with 3 kids and my wife mine goes real nice. Never had it dyno'd but I am looking into a tune so in the future I'll have a idea.

 

Im not sure if that is 100% true as I had mine done last year by my uncle and it took 4 credits to unlock it have a look on vcm any ways they have all the listing and how many credits unlock what. ;-)

 

I just had a new ecu put in my car and needed the ecu to be unlocked again so that my charger tune could be loaded onto it. Cost me 2 credits at 75 each. 150 for both credits. This is a new price that was only done roughly 2 months ago.

 

Thats sound's a bit better because when I had it tuned last year and checked the HP tuners web site it was four credits to unlock.It's about time they changed it, it was one of the few computers that costed so much to unlock.

 

Hmmm interesting to take a look at this sticky thread again. Been terribly busy for the past several months, no time for my car at all... I'm thinking the main performance-killer for the V6 Alloytec is the extremely high gear ratios of the 4-speed gearbox... I mean come on flat out and in 1st gear till 80km/h till the next gear?! I'm sure acceleration would be greatly improved just by lowering the gear ratios... how much would that cost?

I know ECU changes are a good idea, but I don't understand... what exactly does it do to the car and how does it give an increase in performance?