406 90hp to 110

[robtam]

hi i have a 406 90 hp estate which is ok but a bit no get up an go.my old 405td would piss all over it till it blew up.i have bought a 406 110saloon complete for parts .i have looked at the intercooler it has some wires on the manifold which i cant see on the 90 estate as i hope to put that on.any information on what else i can do or swap over would be helpfull .thanks

[steve_earwig]

Hi there, welcome

I guess this might be easy or it might be stupidly complicated, involving swapping loads of electronics including wiring looms.

Do you know if the 90 is Bosch or Siemens injection?

Can you tell us the build codes for both cars? See viewtopic.php?f=3&t=15713&p=153034&hilit=+09891#p153034

[binnzy]

you need to swap the injectors first, you will see a big improvement just with that.

[robtam]

hi thanks for both the replys.my mistake but there are no wires on the intercooler manifold.110 build code0913189 on 51 plate 90 build code0847489 on w plate on the 110 where the intercooler pipe goes from rubber to ali there is a sort of valve with one plastic pipe going to the right hand of three switches on bulkhead the middle one being egr the left hand one has a pipe going to left hand back of engine. my 90 has only got egr switch an no other connectors. i can change the injectors.do they tend to seize in head? . and can i put intercooler on without connecting this valve/switch up as its not worth changing the loom .could this mess up ecu .air flow ect. thanks for your help.may have to buy 110 estate.cheers

[steve_earwig]

110 build code 0913189 90 build code0847489

So the 90 is a semi-mux but the 110 is full-mux, damn. The valve on the egr is an air doser (it's controlled by the 3rd valve on the bulkhead) You'd need to swap over, umm, everything as you can't just stick the 110s ecu in, you'd also need to change the BSI and most of the other electronics on the car. Or just fit the intercooler and have it remapped, although if it's Siemens injection it might prove problematic.

Perhaps it might be worth seeing if there's any problems with it, a 90 will be slow but no catastrophically so.

[GingerMagic]

you need to swap the injectors first, you will see a big improvement just with that.

I assumed the 90 and the 110 injectors are the same? So are you saying if you put 110 injectors into a 90 engine then you could get an increase in performance..??

[Welly]

Fitting the intercooler from the 110 will do nothing for performance. Diesel performance is all about the amount of fuel injected. The I/C simply keeps a lid on the charge temps and helps reduce smoke.

[rwb]

Unfortunately, it all sounds like a bit of a non-starter
The 90 is an excellent piece of kit, but it's never going to be quick off the mark.

The best course of action to get more out of the 90 is a remap.

It may be worth talking to map developers about whether they can make any use of an intercooler if you were to fit it. (Colder air is denser so you can fit more of it into the cylinder and therefore if you inject more diesel then there'll be enough air to burn it.)
Of course, if you're squashing more air in then that air must all get sucked through the MAF so it may work itself out.

[madmadmax]

what a bundel of miss infomation the inter cool will drop strat in. just take all the pipes from the turbo to the manifold and the manifold elbow as it has difrent angel on it then go to hdi tuning or who ever and get a stage two remap and have your self 140bhp. he can turn on the wast gate controle on the ecu but you will have to then run the cabels for it so its not worth it imo, no need to do injectors or any thing like that.

just a bit of cutting out for the intercooler to get the air flow, thats the hard bit

you can cut the flap out of the air doser and use it

[Welly]

what a bundel of miss infomation

The OP said he wanted to fit the Intercooler to his 90 as if that would give a power increase, it won't on its own but you are right it needs to be in conjunction with a remap I just didn't think he was going down the remap route.

[Bailes1992]

The intercooler actually made my 90 feel a bit 'perkier'. The intercooler did increase lag ever so slightly though, I must admit.
I went straight for a custom stage two on my HDi90 but unfortunately the clutch started to slip very soon after. I ended up with a Stage 1.5. It was 128bhp and around 305NM if I remember correctly.
It was a very nice engine too with a remap and quite fast. Would sit on the rev limiter at 4750 at around 130mph quite happily.
The HDi90 has a very short ratio and close gearbox compared to the 110 which meant if you worked the gearbox it was actually a quick car! That said if I kept it I may have looked into upgraded clutches and maybe fitting a 110 gearbox but I got rid of it after about 3 months.