406 1.9 2.1 timing belt mileage and 0-60 times

philb · Post by **philb** » 08 Oct 2010, 05:55

whats the general feeling about mileage for a timing belt before it gets changed
and i would be realy interested in your 0-60 times just for fun of it
my 406 1.9 td estate is doing 14.4 0-60
before i start tuning her
tia
phill

spider · Post by **spider** » 08 Oct 2010, 10:56

Up until 98 (which will be a 2.1 and probably a 1.9 as the HDi replaced them) , every 72k miles or 5 (maybe 6) years if you did not do that mileage.

If in doubt, change it though

, a belt breakage on the XUD is very destructive (you cam ends up in three pieces) and given the design of the cam bearings, a replacement head is usually the best 'fix'

I do remember recommending it every 5 years if they had not done that mileage.

Probably worth changing water pump at that time too.

evilally · Post by **evilally** » 08 Oct 2010, 11:06

How are you measuring 0-60? I tested my 405 with a little application that uses my phone's internal G-meter. With only adjustments to the max fuel screw and waste gate, it got 12.8 running on 100% WVO. That was my first and only run, I think I could squeeze more out of it

philb · Post by **philb** » 08 Oct 2010, 15:40

thanks 72k mmn seems a lot -its done 45 k might think about that
sounds likea good 0-60 time
i havnt started tuning her yet but i will
its got the as3 pump =so might not be so straight forward as i dont see the max fuel screw its buried ..

measured it with stopwatch on phone from standstill to 60 in third gear
where to start though
i will fit a boost guage --what turbo pressure are u using btw

spider · Post by **spider** » 08 Oct 2010, 16:16

philb wrote:thanks 72k mmn seems a lot -its done 45 k might think about that

That's what they recommended, bearing in mind that's with a genuine belt (which are quite strong)

As a better guide, I do mine at about 30k to 40k

evilally · Post by **evilally** » 08 Oct 2010, 18:11

Running 18psi, which is about as much as I'll go with the standard top mount intercooler. I think the 406 has a front mount though? I might reduce the max fueling and try adjusting the on boost fueling. What's an as3 pump? The 405 is also a fair bit lighter than the 406, so will always be a bit quicker like for like.

Boost gauge is the first step, a standard engine will turn out 13psi. Loads of guides on the internet, most for the 306 but it still applies.

philb · Post by **philb** » 09 Oct 2010, 20:57

as3 is a bosch pump vp 20 i think very similar looking to standard bosch

Post by **CitroJim** » 09 Oct 2010, 21:34

It's a good job the maximum fuel screw is hidden. Sure it will give you more go but if overcooked it can cause the engine to overspeed and off-load, say in the event of a missed gear or during the MOT test it can overspeed to the point of possibly going bang.

MOT Man: "it passed but the engine is toast..."

The boost overfuelling screw on top of the pump seems to give good results...

When you do the belt, do the waterpump at the same time. If you don't it's almost guaranteed the waterpump will fail shortly afterward...

philb · Post by **philb** » 09 Oct 2010, 22:10

ok being methodical about this where do we start
the max fuel screw
the top boost screw
the offset mushroom withn the top bowl i am told tiring this increases fuel when in boost mode

othe actual rathcet cog

can someone explain what and how these work and what to look for to tell u they are adjusted correctly

i have read a few guides bit they dont give enought detail