Xantiaman's Blog

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

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XantiaMan
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Xantiaman's Blog

Post by XantiaMan » 20 Jul 2008, 08:59

Some may recognise it as Jim's old Activa,we managed to do unbeatable and unmissable deal, one i could not turn down. I've wanted one of these for a while and Jim's looked ideal, although it needs some bodywork bits doing here and there, an afternoon spent polishing was very worthwhile and the colour has really grown on me.

It's done 106k, had everything done mechanically and it all works as it should. As ever with a new car some things need doing but ive never had a car that needs nothing!

A couple of pictures from this morning -

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I'll be seeing Jim more often, as he is currently looking after my TD whilst it undergoes heart surgery (overhauled injection pump!) It goes without saying how nice this chap is helping everyone out, definatly restored my faith in human nature, hopefully soon i will be able to return his help for some cosmetic attention on his new Activa :wink:
Last edited by XantiaMan on 15 Feb 2010, 20:45, edited 5 times in total.

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DickieG
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Post by DickieG » 20 Jul 2008, 09:10

Hi Gareth,

I hope you're enjoying your new car, it looks much brighter than when I saw it on Friday, well done.

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Post by XantiaMan » 20 Jul 2008, 09:17

DickieG wrote:Hi Gareth,

I hope you're enjoying your new car, for some reason the pics haven't downloaded for me.
Now sorted had to host them elsewhere.

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CitroJim
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Post by CitroJim » 20 Jul 2008, 12:34

It looks a different car already Gareth :D Watching you giving the bodywork TLC was like watching poetry in moton, always very enjoyable watching a craftsman at work..

I did a real double take this morning, I opened up the garage this morning and wondered what my Activa was doing up on stands in front of my garage door :roll: I'm getting old.. For those that are not aware, Gareth's TD is the same colour as my Activa and is a dead ringer for it as it is an accurate Activa look-alike :lol:

On that theme, every time I get in my new Activa I forget to enter the keypad code, even though in my estate it's second nature :lol: It's like my brain goes into Activa mode and I automatically assume it's my old MK2 which had no keypad :roll:

I have now had an opportuninty to compare the driving of a MK1 v MK2 Activa and there are some differences which I'll expand upon in my blog in a bit.

It was a very good day yesterday Gareth :D Thoroughly enjoyed.

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Post by XantiaMan » 20 Jul 2008, 20:36

Safely back home in Norfolk now, driven about 250 miles in it so far.

Took Vicky out in it but she couldnt tell the difference... and i think thats part of the experience, as it gets rid of roll so effectively it almost comes across as being normal behaviour.

Used quarter of a tank to get back from Kent so not bad, if im feeling flush i may top it up to see the mpg but i estimate in the 30's, as my TF would do 300 to half a tank and this should do about 220-230.

When driven in anger its when its chassis shines, in normal driving its just very composed and stress free, roundabouts being taken faster than you think, and when you push it, the tyres give you some indication of whats going on. Will take a while to get used to!

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Post by XantiaMan » 24 Jul 2008, 21:51

Got 220 miles to half a tank, but alot of this was city work and now the boost has gone up, its too tempting to try it out! It's still doing about 30mpg though.

Cleaned it again yesterday and another coat of wax but does need another mop to get some more scratches out, plus all the panel dings.

So far we have scared a Lotus Exige around corners, and a Volvo C70 T5 Coupe that was chipped to 300bhp. Has to be 0-60 in around 8 seconds and its still on unleaded but in this heat, needs to run 99 RON to keep the det at bay, the ECU tries very hard to knock the timing back to reduce it which affects power.

Just a fantastic car to cruise around in with the A/C on or step it up for some enthusiastic driving, its everything i wanted since the boost has been upped, they should have come out the factory like this!

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Image

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Post by XantiaMan » 29 Jul 2008, 19:19

Not much to add really, done well over a 1000 miles in it and its not used a drop of oil. Air conditioning has been working very well in the heat of the past week too.

Because of the heat, the night time temperatures have also been high, i recorded 24 degrees at 9.30pm :? Turbocharged cars really do not like hot air and the Activa is no exception, it does become a bit flat despite the higher boost.

I rechecked the boost today as the MBC has had a while to bed in, and all was well. I actually tweaked it a little further and saw a peak of 13psi, settling down to just under 13psi. However, the ECU was not happy with this, as mid-range in 5th the K-light would come on for 4-5 seconds when it hit this peak boost.

Tweaking it slightly down to a shade over 12psi stopped this from happening, with boost dropping off over 4500rpm down to 10.5-11psi.

This i expect is normal because the turbocharger is so small, a de-cat would help a little and hold the power longer at the top end, if needed.

I found an interesting thread about my gauges behaving odd, seems i wasnt the only one to notice :wink:

http://www.frenchcarforum.co.uk/forum/v ... ght+activa

Popping down to jim's next weekend to get my TD back on the road which i really miss, and may get a few odds and sods sorted on the Activa too!

Gareth

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MikeT
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Post by MikeT » 29 Jul 2008, 19:37

What turbo is fitted to your car Gareth? I've currently got mine on the bench and it's a GT15. According to specs, it's good for 90-150hp and I notice you think yours is dropping boost at higher revs - do you know what hp you're getting now?

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Post by XantiaMan » 29 Jul 2008, 19:43

MikeT wrote:What turbo is fitted to your car Gareth? I've currently got mine on the bench and it's a GT15. According to specs, it's good for 90-150hp and I notice you think yours is dropping boost at higher revs - do you know what hp you're getting now?
Remember i'm talking about a 2 litre Activa which has a different turbocharger to the 1.9TD. It's a T25 the exact trim i do not know but the compressor wheel is very small.

At an estimate i reckon its knocking out about 170-175bhp at 12 psi, up from the standard 9psi/150bhp.

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Post by MikeT » 29 Jul 2008, 20:19

XantiaMan583 wrote:Remember i'm talking about a 2 litre Activa which has a different turbocharger to the 1.9TD. It's a T25 the exact trim i do not know but the compressor wheel is very small.

At an estimate i reckon its knocking out about 170-175bhp at 12 psi, up from the standard 9psi/150bhp.
Sure, that's why I asked what turbo you had as even different 1.9TD's have different turbo's apparently.

Garrett T25 Turbo:
Garrett's T25 Turbos are compact, quick and powerful - very different from the slow starting Turbos of the 1970's and 80's. New technology has increased the efficiency of these Turbos, and their smaller size allows them to start up much faster. They deliver 5-15 psi to your intake. Get up to 230HP for engines 1.5 to 2.0

Perhaps you're right that the exhaust is the limiting factor rather than the turbo tailing off.

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Post by XantiaMan » 29 Jul 2008, 20:52

MikeT wrote:
XantiaMan583 wrote:Remember i'm talking about a 2 litre Activa which has a different turbocharger to the 1.9TD. It's a T25 the exact trim i do not know but the compressor wheel is very small.

At an estimate i reckon its knocking out about 170-175bhp at 12 psi, up from the standard 9psi/150bhp.
Sure, that's why I asked what turbo you had as even different 1.9TD's have different turbo's apparently.

Garrett T25 Turbo:
Garrett's T25 Turbos are compact, quick and powerful - very different from the slow starting Turbos of the 1970's and 80's. New technology has increased the efficiency of these Turbos, and their smaller size allows them to start up much faster. They deliver 5-15 psi to your intake. Get up to 230HP for engines 1.5 to 2.0

Perhaps you're right that the exhaust is the limiting factor rather than the turbo tailing off.
There are about 200+ variants of a T25, easily! You can get a turbo based on a T25 thats enough to flow to 300bhp. Infact any turbo can be called a hybrid as its always modified to suit its application.

In the case of the engine fitted to the Activa, it has to suit the characteristics of the engine size, compression ratio, the way the head flows, how many valves it has and how high it revs to.

Its for this reason that a diesel turbocharger is not a good idea for a petrol. It has to produce boost much earlier and this is done by smaller turbine and compressor wheels, the downside to this being the top end is reduced.

No problem for a diesel as most dont produce power over 4000rpm whereas a petrol will be making peak power typically between 5-6000rpm.

Diesels also run lower EGT's so the turbocharger can run at a higher boost, a good example being the XUD lump that runs about 14psi and can run more boost, to about 17-18psi before it starts to heat up the inlet temperatures.

There's alot to learn and know about turbochargers but alot of it goes over my head.

I do know from looking at an Activa turbocharger on the bench that the size of compresser wheel is ideal for low boosting, it does this well, as you can see 8psi just after 2200rpm, but the turbine housing is very small (as to be expected from a T25), the turbine wheel must also be fairly evenly matched.

A simple improvement would be to increase the size of the compresser wheel, which would mean running similar sort of boost but making more power because the wheel is shifting more volume of air and the inlet temperatures are also reduced. There would be very increase in turbo lag because the turbine wheel remains the same size.

Next step would be a different turbo with a better flowing turbine side an even bigger compressor housing and wheel. You could get big power from this engine because its head has massive valves, a bit of porting and matching on the inlet and exhaust sides of the head, bigger throttle body, more effective intercooling and inlet plus exhaust mods, your well into 200+bhp!

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Post by MikeT » 01 Aug 2008, 17:11

XantiaMan583 wrote:[Diesels also run lower EGT's so the turbocharger can run at a higher boost, a good example being the XUD lump that runs about 14psi and can run more boost, to about 17-18psi before it starts to heat up the inlet temperatures.
My XUD turbo is set to open at 10psi according to my foot pump :lol: I do have a manual boost controller to fit yet as well as a boost gauge and I would very much like to have an EGT gauge fitted if only for educational purposes as I've read how the EGT from a diesel is the best way to tune them by. Also that low EGT's indicate good economy making it a good tool all round.

It would be interesting to experience increased boost levels as this car drove quite smartly off the line as it was.

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Post by XantiaMan » 07 Aug 2008, 07:46

So far i have totalled 1500 miles in nearly 3 weeks, no wonder i'm skint! :) But they have been very enjoyable miles, as the ECU has nicely adapted to my driving style and strong pull from 1500rpm onwards, very much like a modern diesel but without the fuel economy! Its doing around the 30mpg mark which is pretty good as it does get the occasional blast, higher boost is too addictive :roll:

I was allowed to clean the inside of it yesterday evening, whilst i still have the loan of a carpet extraction machine from my dad i thought it time to give the grubby carpet a good going over. The job ended up being a 2 and a half hour one instead of 30 minutes :shock: .

The drivers side footwell was the worst, it may have been LHM on the carpet as it had a distinctive green hue to it in the middle, after 5 goes i was still sucking dirt out of it and in the end had to move on the the rest of the car after acheiving an acceptable result. I'll give that bit another go when i get my traffic film remover.

The rest of the carpet came up pretty good, plenty of split tea coming up too! A quick spray of neutradol to freshen it up afterwards and it will almost look new inside..

Me and Vicky are now starting the process of moving from Norfolk to Kent so from now until next Friday we are going to be flat out. Jack is staying with his nanny whilst we do the move, and inbetween i have to get over to Jim's to get my TD finished off, really looking forward to driving it again! We then have the logistical nightmare of getting two cars back to different places but i think me and Jim have figured that one out!

It's then off my grandads 80th in essex and a bit of a family reunion on Sunday and then back up to Norfolk once we have dropped Jack off in Kent again...this is why i have to get the TD sorted because of all the driving!

The rest of the week should be straightforward, not looking forward to handing the keys back as i always worry about getting the deposit back but never had a problem in the past, fingers crossed!

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CitroJim
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Post by CitroJim » 07 Aug 2008, 09:50

I thought I told you the story of the drivers footwell Gareth! I discovered the drivers side carpet was a bit wet with LHM shortly after I got the car. I lifted the carpet and ARRRRRRRRRGGGGGGGHHHHHH! everything was soaked in very old, very black LHM.

At some time in the past I reckon the brake dosuer valve sprang a leak and soaked everything. It took me ages to clean it up to a suitable state, especially all the LHM that soaked into the foam. I had to "squeegee" it out! I never used a proper carpet cleaner, hence the remaining green stain!

The past 18 monyths have proved it was an old wound and there has never leaked since and as you know, it consumes no LHM worth speaking of.



Looking forward to seeing you tomorrow and getting the TD sorted...

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CitroJim
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Post by CitroJim » 22 Aug 2008, 20:34

superloopy1 wrote: Can't see what Jim didn't quite get to like about it :wink:
I's just a me thing :) I love red cars with a passion and to be fair, Gareth's car never looked as good in my ownership :roll: Gareth has transformed it and it now looks rather stunning :D

My favourite car colours are red, white and blue. Curiously, I have owned more white cars than any other colour, around 15 at last count.

Anyone ever seen a white Activa?