My S1 Activa

Tell us your ongoing tales and experiences with your French car here. Post pictures of your car here as well.

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CitroJim
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Re: My S1 Activa

Post by CitroJim »

Xac wrote:
Chris570 wrote:
CitroJim wrote:Good stuff on the Activa Chris :-D

Or you could moderate your driving.... [-X [-X
How does that work?
I think it's an urban myth.
The handbook tells you how. It shows a picture of a feather tickling the accelerator pedal....
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Xaccers
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Re: My S1 Activa

Post by Xaccers »

CitroJim wrote: The handbook tells you how. It shows a picture of a feather tickling the accelerator pedal....
Wouldn't that be dangerous, and ever so slightly kinky?
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CitroJim
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Re: My S1 Activa

Post by CitroJim »

Xac wrote:
CitroJim wrote: The handbook tells you how. It shows a picture of a feather tickling the accelerator pedal....
Wouldn't that be dangerous, and ever so slightly kinky?
Maybe it's what keeps them happy... Perhaps that's what your HDi needs Chris - a good tickle with a feather... All this clutch slipping nonsense is just a plea for attention... You know what you must do...
addo
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Post by addo »

Xac wrote:Wouldn't that be dangerous, and ever so slightly kinky?
A lot of young blokes seem to think there is a correlation between G-forces and the G-spot.
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myglaren
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Re:

Post by myglaren »

addo wrote:
Xac wrote:Wouldn't that be dangerous, and ever so slightly kinky?
A lot of young blokes seem to think there is a correlation between G-forces and the G-spot.
Inextricably linked if the way one of my neighbours drives her Lotus Exige is anything to go by.
Deanxm
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Re: My S1 Activa

Post by Deanxm »

Chris570 wrote: It also had a 'chipped' ecu, now i'm usualy very dubious of such claims as its a very difficult claim to prove/disprove the validity of this. but the rest of the deal was good without this little sweetener so i thought at worst i'd end up with a spare TCT ecu. After getting peeved with the XM exhaust i decided to fit the ecu this afternoon, i took it out for a spin and was very disapointed, it obviously wasn't oem as it was different to the original ecu, it felt a lot flatter really down on power. The setup it came from was with the OEM boost controller so i figured that maybe it was setup for a lot more boost than i was running so i pulled over and upped the boost to a point that would normally send the ec into a tizz and took her for a run...

This is what i found with mine very early on, it didnt seem to run any different to any other tct ive driven or been in except for the fact boost came on nice and early, more so than others but that wouldnt be ecu related, all it seems to do is stop the ecu throwing all its toys out of the pram at 14psi, with the fuel pressure turned up and a new filter ive been to 20psi and spiking to 22psi with no problems ecu wise a few times now, i was concerned about the engine running lean at such high boost but the knock sensor and lambda probe seem happy, it is an ocasional use thing though hence why i have in car control of boost.

Most of the time i run 6-8psi for pootling around then12-14psi which is nippy enough and well within what the engine can take for spirited driving, if you really want to upset standard impreza drivers i know one turn on the boost control will see 20psi and certainly enough grunt to leave them wondering what just happened, wouldnt like to use it all the time though, the acceleration is impressive at this setting i will agree, she will light up the front tyres in 3rd if you stab the throttle like a pillock, but like i say, ocasional use only with a nice fast cooldown run after to keep her happy, the massive intercooler helps.

You really need a boost guage, dont just go twiddling the controller, if the pipe sizes large or vent too small you can get massive boost spikes and of course could be running far too much boost, you really do need to keep your eye on things, temperature and altitude affect boost levels throughout the year too, by a surprising amount.
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Dommo
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Re: My S1 Activa

Post by Dommo »

Deanxm wrote:This is what i found with mine very early on, it didnt seem to run any different to any other tct ive driven or been in except for the fact boost came on nice and early, more so than others but that wouldnt be ecu related
I think you'll find the stock ECU does control the boost pressure, it limits boost at low RPM to make it a smooth 'off-->on boost' transition, which is REALLY annoying when you notice it doing it. That's why when you put a manual boost controller in it comes onto boost so much more aggressively and often breaks traction which it doesn't do as easily when standard.
Deanxm wrote:if you really want to upset standard impreza drivers i know one turn on the boost control will see 20psi and certainly enough grunt to leave them wondering what just happened
Funny you mention this, my mate used to own a turbo 2000 impreza, when I upped the boost to 14 psi/1 bar (just enough to keep the ECU from moaning) I always used to keep up with him in the straights, and shown any corners... Well, you know the score :lol: You have to remember though, the Impreza engine is only a 2 litre turbo just like the Activa engine, so there's no reason why Citroen couldn't make it that powerful from the start apart from being French and lazy :roll:
Deanxm
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Re: My S1 Activa

Post by Deanxm »

I think you'll find the stock ECU does control the boost pressure, it limits boost at low RPM to make it a smooth 'off-->on boost' transition
Yes, very annoying, i found it did give constant torque in that setup but unfortunatly it was constantly no torque at all, it now pulls from idle in 5th as smooth as silk whereas before it was a bit lacking.
Its such a shame, if citroen wanted to market the activa as family hack then why not fit it with a hdi engine, if they wanted to make a impreza ish car then why use a good strong engine and limit the power so badly from the factory? the setup just doesnt make a any sense.

D
KP
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Re: My S1 Activa

Post by KP »

The control valve plays a large part as well.

IIRC PRV's spike and attain boost very quickly but PBV are more linear in progression, ie gentler.

My old Coupe used to run in the region of about 300-330bhp from the mods i had on it and most of the time was on base boost so pushing about 280-290 and anyone who drove it wouldn't describe it as turbo but more of a big block V8 that was gentle and un-rushed in approach but when you watched the speedo it told a different story.

Standard boost had the car upto the speedo's top notches , 4 up, boot full and some bags between rear passengers ;)

The Apexi Boost controllers are very good for the money and let you set so much you can litterally have a standard plodder for day 2 day pootling and keep MPG up, and then an all out but still safe crazy boost mode that allows a lot more aggressive boost climb without spike and it just works everytime :D
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Citroening
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Re: My S1 Activa

Post by Citroening »

KP wrote:The Apexi Boost controllers are very good for the money
This. A friend has got one in his Scooby. Neat bit of Kit.
KP
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Re: My S1 Activa

Post by KP »

Ahh yes, it looks like an AVC-R.. very good bit of kit and 2nd hand as long as they have all the bits they are a true bargain :)
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Citroening
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Re: My S1 Activa

Post by Citroening »

That's the one! Lord knows what he's spent on that car. Link.
KP
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Re: My S1 Activa

Post by KP »

Small lottery win perhaps :D
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myglaren
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Re: My S1 Activa

Post by myglaren »

I find the whole thing baffling. :?
Why not just buy a proper car and be done with it.
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Citroening
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Re: My S1 Activa

Post by Citroening »

Well admittedly he didn't just start off with a standard Scooby and made it to what it is today. A good deal of the hard work and expense was done by this Powerstation company - it was their build car.

He's done a fair bit though and thats totalled a fair sum now I suppose. Compared to when I first saw the car when he got it, it looks a different beast altogether! :shock:

I've been passenger in it and it's a very rapid thing indeed - if you were at the CCC National 2011 you would've seen it on the Friday when he gave me a lift back. It's recently had a methanol mix done and all in all it's running about 420BHP which is good fun. 8-)