TU3?

[djoptix]

Yo peops,

Sometime next year if the BX is still going well I'm considering getting something a bit more small and chuckable. It'll have to be cheap to run and insure but still fun. I have been thinking about a 205 XS, as I believe a couple of people on here have recommended it, as far as I can see its good points are...

* TU3 engine, same as AXGT?
* Therefore shedloads of tuning bits available (I don't want to go mad with it anyway, filters and general tuning is fine for me)
* Small, good turn-in, throwable

But I was wondering if in fact the engine in the 106 XR is the same one as well? Or is it a TU3 but fuel injected? I want carbs really.

A 106 is cheaper to insure than a 205 you see...

[Simran]

I can highly recommend the XS, i have an XR with a GT twin choke carb and i have a GT (4 door XS) coming my way soon and they are awesome cars. lots of power low down and so much fun to chuck around. The point where the second butterfly opens is addictive. The XS has a different cam and short ratio gearbox, mine doesnt and i love it, cant wait to get my hands on the GT. Very efficient too if driven sensibly....

[tim leech]

Plus they weigh nowt so power to weight is great, hence why (dare I say it) mi-16v engined 205s go so well.

[Anonymous]

my little sister got a 205XS.
We've lowered it on the front, K&N filter, homemade exhaust, etc.
LOST OF FUN!!!

It drives about 1Liter on 18/19km

[robin hughes]

are you still keeping the bx as well though????????

[Kitch]

205 XS has the same TU3S engine as the AX GT (apart from the later crappy SPFI ones) 1360cc with twin choke solex carb. That spec has quite short gearing and the engines are buzzy little things that tune well. Raceland 4-2-1 manifold is £139 new for example, and stainless steel. I've had loads of AX GT's and the last one was the most tuned I've done. Manifold, full exhaust, skimmed/ported head, cam, uprated carb etc. Good fun.

All 106 TU3's with a carb are early models and have a single choke IIRC, as any sporty model had MPFI. They're all alloy blocks, apart from the TU3JP MPFI models fitted to the AX GTi and 106 XSi which are cast.

[ollie]

106 XSi are well fast, right to the red line in 5th, and a lot cheaper now than they were. The XSi engine is a much better unit than the standard 1.4 with quite a few usefull small differences which make it a whole lot more revvy - and a lot less harsh, prob a better and cheaper bet than tuning a carb one.
And the 205 XS is good too! just as the AXGT.
The earlier suitcase engined one was well rapid too with twin crabs rather than twim chokes! prob not many left now tho..

[Kitch]

The AX GTi's and 106 XSi's are a bit different to the normal ones I agree. They have a 7200rpm rev limit, and bigger valves. Same as used in the 106 Rallye and Saxo VTR.
Have to say I don't think they're as fun as the AX GT, although unquestionably quicker in standard form.

[Mike E (uk)]

We had a 205XS about 10 years ago, it was fairly new back then.

Seriously good little car. With the K&N filter it really growled when the 2nd choke opened, and the feedback from the steering was superb.

It was also surpisingly comfortable for such a small car.

It got crashed into one day, otherwise we would still have it I expect.

[djoptix]

Am I right in thinking this is the same engine as in the BX14? In which case I could just get another BX (as I want to strip it out anyway, and I could probably get the weight down to 205 territory!) - put 16v bodykit on it., wheels, etc but presumably the BX14 is longer geared...

[RobC]

basic engine's the same, but there's an uprated inlet manifold and twin-choke carb fitted to the 205 XS and AX GT, that takes the bhp from 75 to 95ish IIRC.
not sure about the gearbox.
having said that, i used to run a BX14 and always thought it was lively enough!

[djoptix]

Interesting... because if the only changes are on the induction side, it would be easy to do the same mods to a BX14. Presumably there's an HP pump which would lose 5bhp or so?

Quite like the idea tho, esp as an extra light BX14 could be made super stiff with a sphere change... (try saying that drunk! )

[Kitch]

It can be done easily. I fitted an AX GT carb and inlet to my BX 14RE when I was 16! Worked well.

Same engine bar those two obvious additions, and the AX GT has a slightly lairier cam. Power is 73bhp vs 85bhp, although most of that is down to the twin choke.

To be fair....when tuning an AX GT you would normally seek out a bigger carb/twin carbs anyway. The Weber 38DGAS is a good conversion, and the AX GT manifold can be adapted to fit.
The key to unlocking power from TU's is bigger valves and more air flow, so with a bigger carb, a ported head would go well. Hunt a 2nd hand one down on ebay. Skimming can also have dramatic improvements, as Luke found out with his AX GT.
So with that and a lumpy cam a BX 14 would be fun. Although I would definately fit an AX GT gearbox...the ratios are noticably shorter. But thats gonna be 100-110bhp and with a ligther body thats BX19 territory at least, maybe even GTi 8v. Why you'd do it I don't know, but it'd be funny

[djoptix]

TBH mate, the main reason would be cheap insurance!

[csg100]

I used to have a 205XS and blew a piston ring. Changed the engine for a standard 106 one I got cheap and just bolted on the Solex twin choke carb and manifold. Worked great. The original engine would rev to just under 8krpm, without loss of power, before valve bounce started (I seriously abused this car), but the new one only got to around 7krpm before it became useless and need changing up. But of course you got a bit more low down torque.

In a head-to-head race from standstill against my mates Belgian 205XS we were still level pegging at around 70, so couldn't have had that much of a detrimental effect! So bung the twin choke carb on a BX14 and you get a fairly hefty power hike for just a few quid.

And I wouldn't worry about the 16v bodykit/wheels - keep it looking bog standard and have a proper sleeper