Xantia XUTD Tuning - Effects
Moderator: RichardW
Yes hes open saturdays. discount for two (cash), mate and i went over so got discount. time taken depends upon fuel pump fitted.
Make sure he's got plenty of circlips. Lol, when Derv doctor did mine he lost the circlip for the turbo - it popped off never to be seen again.
At first you'll think that not much difference - he'll take u onto the main road for a test - usually the dual carriage way and let u nail it up the hill, so best have a run up it under normal tune. Once you leave the main road with its 50 limit and safety cameras for the twisty country lanes, you'll have a big grin on your face will pull much more strongly with the urge kicking in lower in the rev range - mine u can feel at 1800 (ish), then really takes off at 2k, no point revving it out as torque curve is flat by that point, so little in the way of speed increase.
have fun [:)]
Make sure he's got plenty of circlips. Lol, when Derv doctor did mine he lost the circlip for the turbo - it popped off never to be seen again.
At first you'll think that not much difference - he'll take u onto the main road for a test - usually the dual carriage way and let u nail it up the hill, so best have a run up it under normal tune. Once you leave the main road with its 50 limit and safety cameras for the twisty country lanes, you'll have a big grin on your face will pull much more strongly with the urge kicking in lower in the rev range - mine u can feel at 1800 (ish), then really takes off at 2k, no point revving it out as torque curve is flat by that point, so little in the way of speed increase.
have fun [:)]
I haven't bothered trying to access my max fuel screw which will restrict overall performance. Taking the pump off and angle gringing the plate off sounded far too much trouble! Despite that you can still transform the performance by adjusting how the boost fueling is delivered. Additionally, I'm not sure how much control the ECU has over the workings of these later type pumps - would adjusting the max fuel screw actually make that much difference?
Well angle grinding the thing off seems to be the way forward! He he...brutal but effective. Seems PSA cottoned on to people fiddling with the pumps to get more power. It probably jeapordised people's purchases of 2.1 TD's and HDi 110's as you can get the same grunt out of a 1.9 XUDT. 90 horse just isn't enough boys and girls....PSA know it hence the HDi 110 fitted to the 406's and Xantia's.
Im thinking about getting my zx done, how much (if anyone knows) does it cost, I know its got the lucas CAV pump on it, but unsure which turbo is fitted (not actually looked). I would do it myself but am unsure about the process (have looked at guides). Am I correct thinking id need a boost guage? If so how much do these cost?
The Derv Doctor near Derby charges £120 plus vat for the 22-26 bhp upgrade. I'd rather take it in than do it myself to be honest. I'm not that handy when it comes to cherry poppers. Petrols? Fine...let me at em. But I'm still new to weasels. The guide off t'internet talks about spilling diesel everywhere and fitting a boost gauge and fiddling with screws and looking at smoke etc....scary!
According to Gav @ The Derv Doctor it causes no extra stress on the engine....it simply takes up the slack in the manufacturers settings. As long as you take care of your engine (which should ideally be healthy to begin with) and don't drive like a t1t then you should be fine. Overboosting it past an extra 26 bhp will increase the risk of popping the head gasket though. It will probably also start to smoke like a swine too. Be reasonable about the gains and all will be well.
A mate of mine has chipped his Seat Toledo TDi and wound the boost right up on the black box. Now it does go well but it looks like the flaming bat-mobile as it goes down the road with plooms of smoke coming out.
A mate of mine has chipped his Seat Toledo TDi and wound the boost right up on the black box. Now it does go well but it looks like the flaming bat-mobile as it goes down the road with plooms of smoke coming out.