Air box mods??

[mcd]

www.users.on.net/~pedroj/ute/vy_ute_airbox.html

Is this worth doing? I did simialr on my old vectra GSI, but i added ducting run to the front of the bumper etc....

That said, i have a HSV airbox fitted... so will it already be optimum?

Is this mod just for making noises? induction roar etc?

Mike

[uk hsv]

That mod should be standard practice on all 2004 model Monaro's.......

If it was not done on your car do it now.......

It is documented here from a year or so ago....

www.pistonheads.com/gassing/topic.

If you talk to a Wortec dealer they can supply and fit a OEM pipe instead of using a drain pipe!!!


here are the missing pictures








>> Edited by uk hsv on Wednesday 9th November 15:08

[comm_SS_V8]

I have the K&N Air filter and the hole cutter for sale if you want it. Everything is brand new. I bought it shortly after I got the car but did the STAGE1 instead. EMail me if you're interested.

I also have the original unmodified airbox + OEM filter which you can have as a spare.

>> Edited by comm_SS_V8 on Wednesday 9th November 19:25

[caspy]

STAGE1 ???

[comm_SS_V8]

WRC STAGE1 = WORTEC Performance Pac (W410)

Basically the CAI, Headers, Exhaust, Remap, etc.

[paulcv8]

Is this mod relevant to 2005 cv8 monaros? or is it only for up to 2004?

Thanks Paul

[mcd]

Interesting, cheers for that, will pop the box open tomorrow in the daylight and have a look!

All i know is that the box has been swapped out for a HSV item at Linden & also has a K@N fitted!

Mike

[uk hsv]

[quote]Is this mod relevant to 2005 cv8 monaros? or is it only for up to 2004?

Thanks Paul[/quote]

for 2005 you make the hole in the side of the box and add a 90deg bent pipe........

[BigNige]

I'm a bit confused.

What are the benefits of hacking the airbox about like this?

[eliot]

BigNige said:

I'm a bit confused. What are the benefits of hacking the airbox about like this?

The idea is that cold air is denser than warm air, therefore you get more power. However, I would say the gains are marginal. Probably only talking of a few BHP I would think. Probably less than the repeatability of a dyno.
Here try this online calculator, its for turbo's but Ive set it to zero boost, so you can see the effects of the inlet temp.

www.not2fast.com/turbo/glossary/turbo_calc.shtml?FeetASL=0&Tamb=21&Bore=101&Stroke=90.5&nCyl=8&RPM=5500&VE=85&Boost=0&Ec=100&Eic=0&PdropIC=0&TambIC=21&wiPercentMethanol=50&wiRate=100&wiTemp=21&SFC=0.49&AFR=12&maxInjectorDutyCycle=85

If you current inlet temps are high, then there's a gain to be had.

>> Edited by eliot on Wednesday 9th November 23:39

[uk hsv]

the second hole makes a big difference to air flow at throttle transitions on the Monaro......much better pick up.

Maybe this mod is not revalant to other cars but on the 2004 Monaro it is very worth while.

[BigNige]

Even with a proper Cold Air Intake fitted?

Looks like a good mod and common on many bikes, Ducati's for instance.
Can't help but think though that it's an AWFUL lot of hacking about.

I shan't be doing it, I wanna keep my warranty intact.

[308mate]

This is an interesting thread for me.
This mod was very popular when I had my VS 5.0L. Most people had already established at that time that the cold air intake was a waste of time and money. It was more pipe, taking air an even longer distance, through an opening around the same size as standard. So VN/VS owners set about simply carving the front of the airbox open. The idea was simply: lose the plastic shroud in the front of the airbox, cut out a larger square shape in the box itself and simply leave it open just like that. The downside was the odd horror story about 5.0L engines sucking up their own airfilters as the water could then get straight in and sog the filter if you drove through a big enough puddle. Few people noticed a tangible difference in performance though.
My own (quite possibly ill-informed) opinion is that Im very dubious about airbox mods. By opening up the airbox youre making the assumption that the airbox opening is the inefficient part of the induction system. If any flow system is only as effective as it's narrowest point, how does opening up the airbox help if you leave the pipe from the airbox to the throttle-body the same? Even a K&N filter is a dubious mod in my opinion (in isolation). Most mechanics Ive spoken to say that stock air filters on GM V8s (or lots of other engines) actually flow okay as they are and if youre not helping take air out (upgraded exhaust), why try and put more in?
I'd say (as is my experience with motorbikes) if you want more in, do the WHOLE induction system and do the exhaust aswell. Open up the airbox, whack in a K&N, match the new air-flow with more fuel (re-map/bigger jets) and then get the shitty air out better aswell by doing the exhaust.
Until Im told otherwise (and Im always open to more info), Im sceptical about any isolated changes to induction and exhaust for tangible performance benefits.

PB

[uk hsv]

this mod is genaraly done in conjuction with a GTS maf pipe.............

>> Edited by uk hsv on Thursday 10th November 22:49