26 replies to this topic

[ross_vxt]

Courtenay Sport (www.courtenaysport.co.uk) Say they can up a standard VX220 turbo to 224bhp with just an ECU upgrade/tune. Now a car being slightly more powerful than the VXR220 (220bhp) so you would assume it would be quicker 0-60mph than the VXR? How can vauxhall themselves only justify a 20bhp increase of a vxr in comparison to a vxturbo that hasn’t got an uprated hybrid turbo, reprogrammed ecu or free-flow air filter?

[JG]

there is a bit more to it than just engine mods...


grammar correction

Edited by JamesGray, 23 February 2006 - 10:46 PM.

[jules_s]

And 0-60 times...

[2GOOD]

Think that I read somewhere that the A048 tyres were a major part of the quicker 0-60.

[jules_s]

Think that I read somewhere that the A048 tyres were a major part of the quicker 0-60.

And the advanced sat nav

[2GOOD]

Think that I read somewhere that the A048 tyres were a major part of the quicker 0-60.

And the advanced sat nav

Advanced?? That one's prehistoric* my boy







*But perfect for the VX when it can find roads like those

Edited by 2GOOD, 23 February 2006 - 11:22 PM.

[cheeky_chops]

Courtenay Sport (www.courtenaysport.co.uk) Say they can up a standard VX220 turbo to 224bhp with just an ECU upgrade/tune. Now a car being slightly more powerful than the VXR220 (220bhp) so you would assume it would be quicker 0-60mph than the VXR?

How can vauxhall themselves only justify a 20bhp increase of a vxr in comparison to a vxturbo that hasn’t got an uprated hybrid turbo, reprogrammed ecu or free-flow air filter?

they reprogramme the ecu by upping the boost/fueling, this increases the work the turbo has to do and hence it generates more heat. The reason vauxhall "only" added 20 bhp to the VXR was they have v stringent tests the engine has to pass for longevity.

Dont forget "224" is peak power - you also have to look at the smoothness of a map thru the rev range. I would expect a stage 1 courtenay map to be better that a std vxr map *




* But not as good as a AMD stage 2 VXR map

[dunky]

Having driven both I think the power is not what matters most but the Ohlins (optional), tyres, ABS chip and Pagids make all the difference. I think if I had a VXT I would buy tyres, pads and Nitrons in that order.

[VXT Tim]

I remember reading an EVO COTYE where the VXR 220 they had was not as good as VXT's they had tested in the past. Obviously they could've had a bad car but they said it was overboosting and didn't feel as good as a VXT (can't remember word for word as it was a couple of years ago)

[philz]

Are there any ex Stage 1 VXT owners who "upgraded" to a VXR? How do they compare?

Edited by philz, 24 February 2006 - 09:51 AM.

[turboman]

And don't forget, the drivers of the VXR's are better than the VXT's which helps the performance a lot too.

[Mutt & Jeff]

Torque?

[JaceyBoy]

VXR is obviously more track orientated, so the VXT would be better for roads

[dunky]

Obviously? - I don't agree. I do 20k a year and I wouldn't swap for a standard VXT even for pure road use. Why don't I agree? I think the suspension and braking on the VXR is a vast improvment on the VXT road or track - although I do have Ohlins. The feel of the steering and the power of the brakes on the VXR over a stock VXT are much better. There is no lack of torque in the VXR even if it is measurably lower than a VXT and the extra power up the rev range is handy. It is well established that the N/a is quick enough - sure a turbo is quicker and the VXR quicker still, especially when there is no traffic but the n/as do just fine on the club meets and on the road. I don't think a VXR is worth the extra money unless you like red or the cash is not the most important thing but I do think it is a better road car. Of course I can't comment on the VXR with standard shocks because I have not tried that.

[Joss]

Hear hear. My previous vxt was standard, but there was a huge difference with the vxr even out of the box (quicker boost and much better handling - I have Ohlins too).Now I have a stage 2 and (even though there are a couple of minor issues with the map) there is another leap in performance. I think you have to drive both just to appreciate how different they are - bit like NAs and turbos.

[HRL]

I've got Easy's old car and that's a S3 VXT. Been out in Ratboilers VXR before he had some "work" done on it and it definitely seemed a fair bit quicker than a standard VXT. Does the hybrid turbo really make that much difference to the power range or is a remapped VXT very similar with it's power delivery?

[JaceyBoy]

Does the hybrid turbo really make that much difference to the power range or is a remapped VXT very similar with it's power delivery?

yes a Hybrid will, I had one on my Fiat Coupe 20v Turbo and it held boost much better and was a stronger turbo

[ShinyAndy]

I had one on my Fiat Coupe 20v Turbo

gLOL.. I love posts like that

I used to use clothes pegs to hold cards against the spokes of my pushbike when I was a kid. It used to make it go much faster and it sounded like a motorbike too

[garyk220]

The VXT turbo has a very flat torque curve, with maximum torque available from around 2500rpm. But this turbo cannot hold boost above 5500rpm, so the torque falls off rapidly above this, hence the relatively low power figures quoted even for modified VXTs. The hybrid turbos hold boost much better above 5500rpm, giving a much higher power output for the same torque level, but reach peak torque at higher revs, so the torque is lower than the VXT turbo at anything below 3000rpm. Peak torque is probably available from around 3500rpm. These turbos will give more off an off boost/on boost feel as you accelerate from low revs, but keep the revs above 3500rpm and you will be able to make much quicker progress, and use the full rev range up to the limiter, so should make quicker progress through the gears.

[HRL]

Very well explained. Now I want the hybrid turbo unit.