78 replies to this topic

[philz]

FlyCatcher, what other mods do you have on your car? (I assume a stage 2 map?)

[lilsheepshagga_turbo]

sounds lovely... i may have to part my cash for a blueflame......... ne guys with the milltek got a clip so we can compare? -ho

[FlyCatcher]

FlyCatcher, what other mods do you have on your car? (I assume a stage 2 map?)

No i haven't had a remap yet, as i work away alot, but that's next on my list of things to do!

Apart from the full system (inc sport 200 cell cat and pre-cat replacement pipe) and courtenay panel filter it's totally standard...

I've had the car up on ramps since it was fitted, and removed the undertray, and have to say the fit is spot on, and i can't fault the quality of it either

[FlyCatcher]

Have you removed the cat? You could be in serious danger of knackering the engine if so...

Sorry Paul it's the full system, so includes the motorsport cat and a pre-cat replacement pipe...

[paulf-cam]

Have you removed the cat? You could be in serious danger of knackering the engine if so... 

Sorry Paul it's the full system, so includes the motorsport cat and a pre-cat replacement pipe...

[philz]

Apart from the full system (inc sport 200 cell cat and pre-cat replacement pipe) and courtenay panel filter it's totally standard.

You gained 45BHP from just an exhaust and filter?

I wonder if the free flowing exhaust has allowed the boost to rise a bit perhaps as that seems an awful lot of power gain for very little money.

[jules_s]

Apart from the full system (inc sport 200 cell cat and pre-cat replacement pipe) and courtenay panel filter it's totally standard.

You gained 45BHP from just an exhaust and filter?

I wonder if the free flowing exhaust has allowed the boost to rise a bit perhaps as that seems an awful lot of power gain for very little money.

I suppose its just within the realms of reality

Very very good car to start with

Blue flame say 10bhp+ without map

Doubt the panel filter does much

Badly calibrated RR makes up the rest....

[trackman]

Ive had the blue flame with no cats at all on my vxt it sounds good and revs freely . and the mil light has not come on. :P

Sorry...not possible. The ECU needs a lambda feed, without a cat of any kind or MIL bypass it'll generate an error code and the car will revert to limp home mode.

Both sensors still fitted its been on for 300 miles hard driving not even a flicker and going great ;) who needs cats

[FlyCatcher]

Apart from the full system (inc sport 200 cell cat and pre-cat replacement pipe) and courtenay panel filter it's totally standard.

You gained 45BHP from just an exhaust and filter?

I wonder if the free flowing exhaust has allowed the boost to rise a bit perhaps as that seems an awful lot of power gain for very little money.

I suppose its just within the realms of reality

Very very good car to start with

Blue flame say 10bhp+ without map

Doubt the panel filter does much

Badly calibrated RR makes up the rest....

Badly calibrated you say...hmmm there was other zlet's there on the day, and they were all around the 200 - 210bhp mark, running totally standard... so there must be something in it!

Also some of the other drivers got exactly the same results to within 1-2bhp that they had several weeks before at another RR day somewhere else...

Regardless of how accurate the readings are... the bottom line is that the car revs more freely, the turbo seems to spin into action without the annoying lag that used to occur while waiting for the boost to come on line, and the dump valve seems more audible now too... then the smile starts as the car starts to roar lol... pound per smile...i'm happy

[nakajima]

[quote name='FlyCatcher' date='Apr 9 2006, 23:26 '][QUOTE= pound per smile...i'm happy B) :D[/quote]
and thats all that really matters isnt it your car, you chose the mods

[paulf-cam]

Both sensors still fitted its been on for 300 miles hard driving not even a flicker and going great who needs cats

Well, the ECU for one!

I'm surprised your EML hasn't come on because without a cat, your lambda sensor (after cat) will be reading the same value as the one before the cat. There is supposed to be a difference due to the cat which the ECU knows about.

Either your sensors are fortuitously broken, you've got two o2sims to fake the signals or you have a cat!


Cheers, Paul.

[philz]

Can I just clarify something here please? Turbo engines don't like backpressure so by removing any cats completely they'll thank you for it and you'll gain a fair chunk of power, however the ECU won't be happy as it will be getting dodgy signals from the Lambda sensors. This will result in your ECU going into limp home mode. BUT, if you fit a magical box of trickery to fool the Lamba sensors/ECU then everything will be ok? (obviously I'm completely ignoring the fact that your car won't pass an MOT without any cats)

[paulf-cam]

Can I just clarify something here please?

Turbo engines don't like backpressure so by removing any cats completely they'll thank you for it and you'll gain a fair chunk of power, however the ECU won't be happy as it will be getting dodgy signals from the Lambda sensors. This will result in your ECU going into limp home mode.

BUT, if you fit a magical box of trickery to fool the Lamba sensors/ECU then everything will be ok?

(obviously I'm completely ignoring the fact that your car won't pass an MOT without any cats)

Well, i know that thorney has strongly advised against it. However... my 2p is:

Because the VX has an air mass meter, the ECU should be able to adjust for the increased air flow by adding more fuel. At least, it should be able to adjust upto a point, then it will need remapping.

Happy to be corrected!

Ta, Paul.

[walkes]

what is the point in part combusting fuel and dumping it out of the exhaust? Surely it would be better to correctly combust the fuel you use... Aren't the sensors there to do just that?

[Thorney]

No cats and no MIL bypass means there HAS to be an issue with the ECU, I'm sorry but thats just a fact with these cars.

[vocky]

you can de-cat and not have an 02sim


what you do is move the lambda sensor away from the exhaust flow with a spacer, thus it only reads the gases in the spacer tube

works apparently

look here....spacer

Edited by vocky, 10 April 2006 - 03:49 PM.

[B5M_VX]

Apart from the full system (inc sport 200 cell cat and pre-cat replacement pipe) and courtenay panel filter it's totally standard.

You gained 45BHP from just an exhaust and filter?

I wonder if the free flowing exhaust has allowed the boost to rise a bit perhaps as that seems an awful lot of power gain for very little money.

I suppose its just within the realms of reality

Very very good car to start with

Blue flame say 10bhp+ without map

Doubt the panel filter does much

Badly calibrated RR makes up the rest....

Rolling road figures was spot on for everyone elses car on the day, I got spot on power to what i expected on the same set of rollers, It was very cold that day aswell so a big help,

[vrs_Russ]

Hi Chaps I too am thinking of going for a full system replacement for my VXT - obviously the Blueflame appeals due to the lower cost. My real reason for changing is for the sound - any increase in power is a bonus If I go for either full system will I need a remap? I saw it mentioned previously that the air flow sensor will compensate - but only upto a point... Will I need a remap to avoid future problems? Cheers Russ

[P11 COV]

Hi Chaps

I too am thinking of going for a full system replacement for my VXT - obviously the Blueflame appeals due to the lower cost. My real reason for changing is for the sound - any increase in power is a bonus

If I go for either full system will I need a remap? I saw it mentioned previously that the air flow sensor will compensate - but only upto a point...

Will I need a remap to avoid future problems?

Cheers
Russ

I don't think you will need a remap with the new exhaust rather that a remap will be more effective with a freeer breathing system if you should decide to have one.

Not heard that replacement exhusat causes any problems.