HSV VZ Maloo R8 - Another Exhaust Thread...

[CUNNINGSTUNTS]

Howdy... I'm after some factual advise...please.

I have a stock 06, VZ Maloo R8 (Auto) and am looking to get some more performance with a nice note out of it. I have absolutly no plans to do any other modifications aside from Exhaust, Tune and Air intake the car will be sold in a few years.

I have spent the last 3 hours reading through many other posts about what other people have done on the LS1 forums and damn I am confused on what to go with...

From what I am told and have read, is that most people are going with 1" 3/4 headers 4 into 1, going to a dual 3" system.

And from that I can expect to see something around 270rw KW.

However this appears to be over kill for just a stock 6L engine, well at least the dual 3" system...

Has anyone tested any of the following configurations on an LS2 engine or can explain technically why I should not just get a 2.5" dual system with 1"5/8 headers and expect a similar power output?
(preferably on the same dyno).


Config 1
1" 3/4 headers 4 into 1.
Dual 3" system back.

Config 2
1" 5/8 headers 4 into 1.
Dual 2.5" system back.

Config 3
Stock headers
Dual 2.5" system back.

Any help much appreciated.:)

[taztassio]

go bigger if you have the intake and cam to make it work.

1 and 3/4 or 1 and 7/8 for a large cam, 1 and 5/8 for no cam.

and similarly, twin 2.5 for the 1 and 5/8, (or the 1 and 3/4 for low noise), or the 3" on the 1 and 3/4 or 1 and 7/8 for noise and performance (marginal on teh 1 and 3/4 though)

[CHL]

Hey mate. I have the same model maloo as you. Iputa custom 3'' exhaust on it and lost torque down low in all gears.. The sound is hot as though.. Have a look on utube under - VZ R8 Maloo. Its Ignition Orange..

[CUNNINGSTUNTS]

Hey mate. I have the same model maloo as you. Iputa custom 3'' exhaust on it and lost torque down low in all gears.. The sound is hot as though.. Have a look on utube under - VZ R8 Maloo. Its Ignition Orange..


Checked out the ute, yeah it sounds pretty good, how's the drone on the highway?

Did you also do headers or is that just from the cat back? if so what size and configuration?


I'd be keen to see what results anyone has for a 1" 5/8th Headers into a dual 2.5" system... and again for the 1" 3/4 headers into a 3" system on the same spec engine.

[jws]

Hi Cunningstunts, I would go with a 1 3/4 4into1 HPC Extractors with twin 2.5" exhaust, Best all round combination in my opion for a otr/tune/exhaust mod car. 1"5/8 are good for autos cause they help generate low rpm torque but use loose out on higher rpm HP. Twin 3" will draw away a fair bit of your bottom end power but will flow great a top end.
The other option which works great is 1"3/4 extractors with single 3". Good luck with it mate

[VY_SS_*%]

hey mate

i got the same car as u but in a manual

i got pacemaker 1 5/8 with a 2.5" twin system hi flow cats and a magnaflow cat back system sounds absolutly Hot ill try make a sound clip for u in next few days ull love it

the performance is great too

[CUNNINGSTUNTS]

Heading out to Castle Hill Exhaust on Friday for the day (man 6 hours driving return... better be worth it...lol)

Hoping to go from around 215-220kw at the wheels to around 270kw at the wheels....

I'll post up restults when I get the car back... can't wait 20odd % more power yes please!

[Veeate]

Mate you can't go wrong with CHE.

I have the VZ Clubby and couldn't be happier with CHE's work.

I went the twin 3" as i loved the sound and was always going to get a cam.

cheers
Dave

[CUNNINGSTUNTS]

Going the 1" 3/4 Pacemakers into dual 3" system....Seems to be the best option with the best output... next in line is a CAM.

Anyone want to suggest a good cam for an LS2?

[Veeate]

232/234 112 LSA. No bias in that choice of course :)

Talk to Dale but i think the above cam is what they installed in a lot of LS2 engines they have done before.

[vz300]

Gday I remember reading a post once from a man who recently won horsepower hero's just gone as well as a few times previous said the stock headers are capable of 300rwkw so my advice save the $700 - $1000 on headers and spend it on 3.7 diff gears...... They are perfect for the autos with heaps of punch and great for round town driving....... With the exhaust I would stick to twin 2 1/2inch by the sounds your not after a dyno queen just a nice streetable ute........

cheers

[lowhsv]

awesome wat did you end up choosing?

[vz300]

Mate to be perfectly honest you have a vz r8 maloo, it has a genuine twin 2 1/2 inch stainless steel mandrel bent system on it from memory....... Cut the old mufflers out stick some new ones in that are slightly more open and flow better and leave it. There is no point throwing good money after bad, 4 new mufflers at lets say $600 fitted and you have a great exhaust........

I would not over look the diff gears, with the above exhaust mods a cold air and tune setup and a set of 3.7 gears this thing will pin you in your seat when it gets traction and go like stink........

Let us know how you go.........

regards Brett

[CUNNINGSTUNTS]

Diff Gears are definatly an option, but driving at 120 down the highway at 2500rpm+ would be a little rough on the fuel... I drive around 30,000kms between NSW, ACT and QLD all year long, If anything I would like to see a little better fuel econonmy on the highway after the work being done, I had actually thought of dropping a Diff ratio to make the gears taller, the Auto sits at 2200rpm at 110 as it is now...
(Yes yes, someone is going to say should have got the 6 speed, but being a manual means I can't drive it when I'm broken, which happens far to often and the Auto handles lots of power)...:bawl:

So far I have decided to go with:

1" 3/4 Pacemaker Headers into a Dual 3" system, with OTR and a Tune to match, we are hoping to get around 270KW at the wheels, I had it dyno'd in Canberra (obviously on a different dyno) and it made 215Kw at the wheels. CHE reckon this is the best package for the LS2, gets the most power from a Zortst, Tune and OTR.

I agree I could save some money on the zorst just chopping up what I already have but on the other hand that isn't going to get me "good" power, but will get it a reasonable note, I am told one of the biggest issues with the LS2 and just doing a cat back exhaust is they drone alot. ???

Problem with doing it cheap now is it will cost me more $$$$ down the road when I want to do say a CAM or Supercharger and have to upgrade the exhaust to what I am getting now.

I did have a little brain storm eariler today which was to put a CAPA super charger on instead of the zorst but after talking to several different companies the reality is that I need to spend around $10,000 (opposed to the $7,000 that it "could" cost on paper) to get the job done right. Either way I will still need a good exhaust done to make good power.

Dammit, only 2 days to go! :smilesandbanana:

[vz300]

Sorry I didnt not realize you did not no what you wanted........ Your very first post said " otr exhaust and tune nothing more as I will be selling the car in a few years "......... Doing the mods I said with the exhaust will get you the power no worries and doing a cat back or a full system has no affect on the drone, its the size of the pipe and the mufflers you use that affect that.......

Chasing power of 270kw and wanting to go taller in diff gears to save fuel, whats the point...... If you want the seat of your pants power going taller in gears will ruin that........ Maybe you might be best donating your maloo to a charity and getting yourself an R1 road bike........ Super fast and cheap on fuel......

good luck with that

[CUNNINGSTUNTS]

LOL... What, ya can't have a more powerful car with taller gears?

I want a vehicle that sounds good and has the best output possible from an exhaust, OTR and a tune - which I think I am going to get.

Diff gears will probably never get done as I am yet to find someone who can sell me a taller ratio. (also yet to ask about on here).

As for work down the track, Yes I was originally thinking that I would only do these mods, but after chatting to a few mechanic mates, they reckon we can put a CAM in pretty cheap and eash down the track and will complement the other work being done, I can't say I am not interested... :)

I hear ya on the bike thing, I've been carving the streets since 2000 on the bikes, right now just kicking around on a 954RR + the two stunt bikes. :) Bang for buck, it's the best option... lol there isn't much around that makes it look slow. dunno about "Cheap on fuel" maybe if ya keep the revs under 5k.

[10sec_rx7]

Gday I remember reading a post once from a man who recently won horsepower hero's just gone as well as a few times previous said the stock headers are capable of 300rwkw so my advice save the $700 - $1000 on headers and spend it on 3.7 diff gears...... They are perfect for the autos with heaps of punch and great for round town driving....... With the exhaust I would stick to twin 2 1/2inch by the sounds your not after a dyno queen just a nice streetable ute........

cheers


VZ HSV's DONT have factory extractors.. they are the same manifolds that were on a VT SS..

[CUNNINGSTUNTS]

Quick Update.... Its been a while...

So I took the Maloo to Castle Hill Exhaust handed over my $4000 odd worth of hard earned cash, and the following was fitted:

1" 7/8th Pacemaker 4 into 1 headers.
Twin Cat - Dual 3" system.

OTR with a Tune.

When they ran it up on the dyno in Sydney it made 280KW at the wheels!

I brought it back to Canberra ran it again on the original dyno I put it on where is made 215 originally.... now making a healthy 257KW! (and that's running on regular ULP)...

This is a good example of different dyno's and how they measure KW, the figure doesn't matter so much its the gains that count.

Clean 20% gains across the board, picked up heaps of torque down low too...

Running the same Advan Sports tyres on the ute as I allways have, Now when I stomp on it now it will spin the wheels in 1st gear anywhere anytime and kicks into 2nd under accelleration.

One Very happy customer...

[Veeate]

Quick Update.... Its been a while...

So I took the Maloo to Castle Hill Exhaust handed over my $4000 odd worth of hard earned cash, and the following was fitted:

1" 7/8th Pacemaker 4 into 1 headers.
Twin Cat - Dual 3" system.

OTR with a Tune.

When they ran it up on the dyno in Sydney it made 280KW at the wheels!

I brought it back to Canberra ran it again on the original dyno I put it on where is made 215 originally.... now making a healthy 257KW! (and that's running on regular ULP)...

This is a good example of different dyno's and how they measure KW, the figure doesn't matter so much its the gains that count.

Clean 20% gains across the board, picked up heaps of torque down low too...

Running the same Advan Sports tyres on the ute as I allways have, Now when I stomp on it now it will spin the wheels in 1st gear anywhere anytime and kicks into 2nd under accelleration.

One Very happy customer...

Great result buddy. Gotta love the VZ HSV LS2's !