5.7 (04) vs 6.0 (06)
Discussion
Hiya Guys,
I have finally decided after 6 months of looking around to buy a Monaro, ticks the most boxes for me!
But as I am a serial modifier of cars and would probably go down the Wortec route I can't decide on whether to get an 04 5.7 and use the money I would save to pay for the upgrades or to get a 06 model with the larger engine. I know the 06 has the larger engine, but is this more tunable than the 5.7? I believe the suspension is also uprated on the new version?
In general terms what can the 5.7 power be increased to using well proven modifications (i.e Wortec)?
I do like the new bonnet vents on the latest model as well but are all these worth an extra 4k? As I dont care what registration the car is (only bothered about mileage and how it has been cared for) I want to make an informed decision.
I have finally decided after 6 months of looking around to buy a Monaro, ticks the most boxes for me!
But as I am a serial modifier of cars and would probably go down the Wortec route I can't decide on whether to get an 04 5.7 and use the money I would save to pay for the upgrades or to get a 06 model with the larger engine. I know the 06 has the larger engine, but is this more tunable than the 5.7? I believe the suspension is also uprated on the new version?
In general terms what can the 5.7 power be increased to using well proven modifications (i.e Wortec)?
I do like the new bonnet vents on the latest model as well but are all these worth an extra 4k? As I dont care what registration the car is (only bothered about mileage and how it has been cared for) I want to make an informed decision.
If it helps, my 5.7 HSV had c.540bhp with a Vortech S/C & various other mods. all done at LSV.
Used it as my work car for 3+ years & c.35k miles. It had been the HSV(UK) press car & had a tough start in life, with various articles on it inc. several 0-60 & 0-100 shoot outs. The only engine problem I had was a seized pulley bearing. Probably the most relable car I've owned, one of the cheapest to service as well.
I'd go for nearer 600bhp if I was to do it all again, which IMO would be the ideal amount for an everyday useable car. I never actually wanted more bhp, but I was aware that the car could have comfortably managed another c.50bhp.
Used it as my work car for 3+ years & c.35k miles. It had been the HSV(UK) press car & had a tough start in life, with various articles on it inc. several 0-60 & 0-100 shoot outs. The only engine problem I had was a seized pulley bearing. Probably the most relable car I've owned, one of the cheapest to service as well.
I'd go for nearer 600bhp if I was to do it all again, which IMO would be the ideal amount for an everyday useable car. I never actually wanted more bhp, but I was aware that the car could have comfortably managed another c.50bhp.
Just ask who has 6.0 Litre tuning software in UK, I know WRC-Tech has...
“V8hsv are you not getting on with wortec, because you will find that wortec has the 6.0 litre tuning software as well!!”
I am sorry if you feel my post was to the detriment of Wortec but then I never made reference to them in the first place, glad to hear they too have it and only have praise for Wortec so I will apologise unreservedly.
Having been involved in a lot of development work since 02 using without tuning software I was putting my opinion forward that it is not a fruitful exercise trying to tune an engine without the appropriate tuning software.
“V8hsv are you not getting on with wortec, because you will find that wortec has the 6.0 litre tuning software as well!!”
I am sorry if you feel my post was to the detriment of Wortec but then I never made reference to them in the first place, glad to hear they too have it and only have praise for Wortec so I will apologise unreservedly.
Having been involved in a lot of development work since 02 using without tuning software I was putting my opinion forward that it is not a fruitful exercise trying to tune an engine without the appropriate tuning software.
Edited by V8HSV on Tuesday 15th August 08:48
S/Charger for 490bhp is £2,500 + VAT. AP Racing brakes (you'll have to get these) are £2085 inc. all from LSV. Other suppliers available but I haven't looked up their prices, you can check them via the links & banners at the top of the page.
You'll need headers & exhaust & I'd tweak the suspension as well, but I'd guess you should get some change from £10k if you want 500-600bhp.
When you consider that a Monaro can be purchased for c.£17-20k, you'd have a genuine super car slayer that you can use everyday for less than £30k!
Bargain.
You'll need headers & exhaust & I'd tweak the suspension as well, but I'd guess you should get some change from £10k if you want 500-600bhp.
When you consider that a Monaro can be purchased for c.£17-20k, you'd have a genuine super car slayer that you can use everyday for less than £30k!
Bargain.
Edited by A57 HSV on Monday 14th August 15:34
IMHO the 5.7’s are much better due to the size of the boot (but I would say that wouldn’t I)!
As for the engine, when the difference represents 5% of the overall capacity I don’t think it will make much difference at all.
What might make a difference is the range of tuning products available for the different engines. As the 6lt is newer there is likely to be less choice around and perhaps more expensive?
Best thing to do would be to get a ride in both and see if you can tell the difference. I have driven both and I can only just tell.
As for the engine, when the difference represents 5% of the overall capacity I don’t think it will make much difference at all.
What might make a difference is the range of tuning products available for the different engines. As the 6lt is newer there is likely to be less choice around and perhaps more expensive?
Best thing to do would be to get a ride in both and see if you can tell the difference. I have driven both and I can only just tell.
The 6L has a 4" bore the 5.7 has a 3.9" bore.
Also the 6L has much better heads and a higher compression. The heads are the same as the LS6 Corvette heads. In addition it has electronic throttle rather than cable and I believe its a 90mm throttle instead of the stock 5.7 78mm one.
The cam sensor and knock sensors are also different.
Its worth paying a little more for, except you lose boot space (due to gas tank location) it might be worth a litte more power with the heads and displacement. But It will cost more.
You can get a heads and cam LS1 to blow away the 6L no problem for less cost.
Id get an earlier one mainly due to the boot space. The 5.7L VXR gets my top bet as its an HSV with uprated suspension, brakes, engine tune and larger boot.
Also the 6L has much better heads and a higher compression. The heads are the same as the LS6 Corvette heads. In addition it has electronic throttle rather than cable and I believe its a 90mm throttle instead of the stock 5.7 78mm one.
The cam sensor and knock sensors are also different.
Its worth paying a little more for, except you lose boot space (due to gas tank location) it might be worth a litte more power with the heads and displacement. But It will cost more.
You can get a heads and cam LS1 to blow away the 6L no problem for less cost.
Id get an earlier one mainly due to the boot space. The 5.7L VXR gets my top bet as its an HSV with uprated suspension, brakes, engine tune and larger boot.
There is a bit more to your question as its a question of 04 or 05, its also CV8 or VXR of either. Plus to confuse things there are a large number of 04 CV8's on 05 Registrations!!
The 04 CV8(£17K+)and 05 CV8(£21K+)use the same 5.7L V8. Newer car has extra 20bhp, bonnet vents, different bumper, slightly bigger breaks and twin rear exhausts at the cost of most of the boot space which is filled with petrol tank.
The 04 VXR (£22k+) and 05 VXR (£27k+)are both upgraded by HSV over the base Holden (CV8) in terms of suspension, breaks, instruments, exhaust, aerodynamics, engine output, bigger 19" wheels. The 05 car has an extra 20bhp but the 04 car has 380bhp with a shorter final drive so there isnt a massive difference in terms of acceleration / on road performance. The 06 car has bonnet vents and twin rear exhausts, but again at the cost of most of the boot space. Plus the question of 2004 fuel tank under floor vs 2005 high up in boot on handling.
My view is that the bargain a year ago were the low mileage 2004 CV8's in the low 22k price bracket, but this year the VXR's have dropped below 30k making it perhaps the best option given its starting spec and the relative price difference between it and either CV8.
Bennno
IMO, if you intend tuning the vehicle, the 6.0 has nothing better to offer in terms of performance, as you would likely change the same items for both engines anyway ( heads, cam, exhausts etc )
Although I guess that also depends how far you intend to tune it. If its only exhaust, induction and a re-map, then the 6.0 probably is the better option. If its further, little odds which engine you start with.
As for the VXR....it has some cosmetic bits, that are to the individuals taste...but again. If you are buying a car to upgrade, likely you will change brakes, suspension. So is the VXR worth the extra ??
Is having a non existent boot worthwhile ???
A friend bought a basic CV8 for all of the above reasons.
He will eventually tune the car along the same lines as my own engine, and quite simply the VXR had nothing to offer, nor would a 6.0 for his application anyway. So he saved circa £6-7k, which can be spent on real tuning mods.
Although I guess that also depends how far you intend to tune it. If its only exhaust, induction and a re-map, then the 6.0 probably is the better option. If its further, little odds which engine you start with.
As for the VXR....it has some cosmetic bits, that are to the individuals taste...but again. If you are buying a car to upgrade, likely you will change brakes, suspension. So is the VXR worth the extra ??
Is having a non existent boot worthwhile ???
A friend bought a basic CV8 for all of the above reasons.
He will eventually tune the car along the same lines as my own engine, and quite simply the VXR had nothing to offer, nor would a 6.0 for his application anyway. So he saved circa £6-7k, which can be spent on real tuning mods.
stevieturbo said:
He will eventually tune the car along the same lines as my own engine, and quite simply the VXR had nothing to offer, nor would a 6.0 for his application anyway. So he saved circa £6-7k, which can be spent on real tuning mods.
Spinny whooshy 'charger by any chance...
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