406 2.0L Turbo project

[mikey s]

Hi everybody,

My plan is to take my 2.0l Turbo 406 from luxo barge to track weapon on as tight a budget as possible and as a result need some help planning out the mods.

I'm going to start with handling issues by replacing the suspension with a new full set and getting some lightweight wheels with some fairly focussed tyres. Any suggestions on suspension providers that deal with the 406 and wheels that are particularly light and have the right fitment (at the moment i'm thinking team dynamics)? Also a wheel to replace the huge standard one is well on the cards.

After this I'm going to change brake discs and pads which I've already decided on. By this point I will have spent a small wad of cash and hopefully will be in position to get an economical runaround so I'm going to strip out the interior, replace the front seats with something light and supportive and get a cage welded in. Then it will be time for performance mods, my intial target is 200bhp which shouldn't be to hard and with all the weight reduction should produce something quite competent. For track use however I'm up for a hardcore clutch, short shifter kit and an LSD. Does anyone know where I can get these for a 406 and how much an LSD would cost!

That's the plan so far, I'm form sheffield so any local stuff would be appreciated and thanks for helping if you can!

suspension kits can be bealt with by all of the regulars, koni, spax etc. tyres would have to be toyo r888's for hard track use matched with some nice speedline wheels. i would personally leave the brakes well alone. there 283mm 306 gti-6 spec so they dont really need to be upgraded especially if your stripping the car for weight loss. if you do suffer from brake fade try some mintex 1144's or equivalent.

lsd's are not available for the me/ma type gearboxs. a change to the be series gearbox is possible but then driveshafts etc will become an issue. tuning the 2.0 turbo to 200 bhp will be nigh on impossible with the standard turbo if you want an ounce of reliability. the t28 from a nissan pulsar/200sx is a bolt on fit to the pug manifold, that will see a few more ponys from standard boost pressure compared to the old t25 standard turbo. youre only limited to one bar maximum boost as the ecu only runs an 2 bar map sensor. for the price of a remap and a map sensor change it would be more beneficial to change to a standalone system which can be remapped to suit other mods. youre only limited as much as your budget.

hth and good luck with your project.

[niz406]

My Turn :

Suspension = APEX Lowering Springs / Bilstien Gas Dampers or Avo Sport Adjustable both will cost around the same for a full set
Wheels.... well if you want light weight for racing then, I have to agree with the speedline's unless you can get some 15" 306 ralley wheels (steelies) I think they were 15"'s

Brakes are fine, no need for caliper change... just get yourself some black diamond fast road pads and discs or EBC redstuff for the track with some quality grooved discs.

LSD is available, but for 200hp, you are not going to need one !

200HP is possible from the stock turbo, and to be fair the block will piss it, contray to popular belief I have it on good authority that stock internals of the XU10J2TE will run 270hp reliable... meaning fuel, cooling and forced induction are the only area's that need attention. Of which I can give you pointers if needed?

You can build your own hybrid turbo if you want, utilising a T28 60 Trim comp wheel and cover, with only basic machine shop work being required... that'll be good for 250hp

If you want to increase boost pressure for more kick, then you need a penumatic fuel cut defender, which TurboSmart do.. then you only have to address fuel, well a walbro 255lph intank pump kit from FSE Glenco will sort that with the addition of an FSE Power Boost Valve to compensate for the extra boost being used, thanks to it being a rising rate pressure regulator. You will need the adjustable one with the gauge though!

I did read somewhere on here that someone is doing a remap for like £250 or was it http://www.Highflowheads.co.uk think it might be them to be fair ! !

Anyway let me know if I can be of any further assistance

[zoomer]

Don't mean to go against the grain here, but- is it worth doing it! It would be far easier and cheaper to change the car to say a Saab 9000 2.0/ 2.3 turbo which with a few cheap mods will easily give you 250/270 bhp + both engines have steel cranks, steel rods and fored pistons as standard so you have the potential for even more power if need be

[steve_earwig]

Or bolt a jet engine on the roof

[niz406]

but- is it worth doing it!

Having a taxi that will outpull most generic, commercially produced fast cars..... errrrmmm YES

300hp would be sooo much fun, although it would be expensive fun, what with the price of fuel at the minute!

[sriturbO]

niz gimme the lowdown i want a scooby eating taxi

[niz406]

niz gimme the lowdown i want a scooby eating taxi

Whats your budget and what power output you looking at getting?

[sriturbO]

budget will be around about 500 ish looking for around 250-300 from it

currently running 12 psi boost dump valve ct back exhaust induction kit etc ony 87 on engine

what power u reccon it has as is now

[niz406]

budget will be around about 500 ish looking for around 250-300 from it

currently running 12 psi boost dump valve ct back exhaust induction kit etc ony 87 on engine

what power u reccon it has as is now

With what you have said.... about 175 - 180 need to decat or get a sports cat and a ported exhaust manifold, then sort out fuelling... before a remap and you could have about 200 but that will be pushing it with the standard intercooler (plastic end caps). It will cost you a lot more than 500 notes for 250 - 300hp, 8 times that as a minimum!

[zoomer]

Guys with moded 406t's- would be nice to see some under bonnet pics, i.e. uprated intercoolers and pipe work etc...thought about replacing the standard intercooler with something better, don't think factory one does a particulary good job, but it looks a bit tight at the front for anything bigger?

[cthulhu]

With what you have said.... about 175 - 180 need to decat or get a sports cat and a ported exhaust manifold, then sort out fuelling... before a remap and you could have about 200 but that will be pushing it with the standard intercooler (plastic end caps). It will cost you a lot more than 500 notes for 250 - 300hp, 8 times that as a minimum!

niz, is there a suitable doner car out there with a more sturdy intercooler that can be pinched as a replacement, or is it a case of getting some new end caps made up for the factory item?

also re the exhaust manifold - is it a good candidate for port matching?

[niz406]

Well, I have heard that saab turbo intercoolers are good, and also standard RS500 / Cossie coolers are good, both are all ali coolers. If you can go to a scrap yard and find a galant turbo, they have a larger capacity All Ali extruded tube and fin design intercooler as standard. You will need to sort out the plumbing and use a two silicon reducers but that would be a better bet, plus you would have to custom mount it some where, and for all that effort you might as well do a proper FMIC kit and have your bumper extended. Unles you can fit say a PACE RS500 intercooler behind the rad in place of the stock one?

Anyone know the difference in size?

Also the Exhaust manifold is perfect for porting, mine is.. and with a more free flowing exhaust system you will be surprised at how much of a difference it makes on the turbo's responsiveness.

[TurboTaxi]

i own a 406 2.0i 8v turbo, its currently sitting on K&W variant suspesnsion which is jus stiff enough to keep the big old girl in check as for tyres personal preference, im running federals at the moment and theyre fine till it gets damp...... them im screwed. but team dynamics are probs the best bet for lightweight hard use wheels ive got 18" Moza alloys on mine and theyre not too heavy but at ther same time arent piss weak so i know when im puttin her into a roundabout at 70+mph its sterdy im not gonna warp a spoke like i did on my 306....