I've wanted to equip my 806 in Gillier-Pantone for a while.
In the meantime, he's been using a VSLA for 2 years, and consumption has already dropped from 0,5 to 1,5 / 100 (16%) depending on the season and the routes (best results in summer and beyond 100 km / h).
But as it is a heavy vehicle with a "small" engine, the exhaust should provide a lot of calories to the engine, and logically a severe drop in consumption.
For the moment I don't have any photos yet, everything is still in the planning stage. I explain the topo to you:
My 806 recently exceeded 250000 km. Unfortunately, I sometimes encountered difficulties in disengaging, or in engaging, because of an "automatic" (pfff!) Catch-up cable of the joker type.
A few days later, it was the clutch's turn to make its own. Suddenly it became completely impossible to change gears.
The car is now on holds (for a month
), and I have already taken apart a lot of things to access the gearbox. On the opposite side is the distribution which is in the air, that I had planned but I was hoping to be able to wait for spring since I do not have a garage. I am at 2 sinusitis for having worked poorly covered (what it is to be in a hurry!) By strong west wind (well yes, it's Brittany). 
While I'm at it, I also take the opportunity to dismantle the exhaust manifold and finally install a reactor.
Hey, funny detail: this 1997 model does not have an EGR valve: probably because with 90HP for 1800kg, the engine is rarely "at low load". On the other hand, I have a connection all found to send the steam into the intake (it is not mine, that one)!
In addition, to increase the efficiency of the GP, I have planned 2 modifications which in my opinion could improve doping:
- Change the turbo setting: the bypass will open earlier, to leave fewer calories in the turbo and more in the reactor.
- Change gearbox: to have observed it on the AX, the "optimal GP torque" is available below the original one. So I try to "find" the maximum output around 90-110 km / h.
I read on another forum that someone put a box of 405 on their 8O6, so it doesn't seem impossible?
As an indication, Alex56 obtained better results with his R21 by "grafting" Nevada rims, higher: but no need to go to the CT with that: failed!
In principle, the PSA gearbox casings are identical, and sometimes even the entire gearbox: it makes sense if the engine is the same. On the other hand, the manufacturer has adapted the axle ratios to each model (PTAC, sCX ...).
In addition, according to a colleague, it seems that 806 / Evasion / Ulysse gearboxes have encountered lubrication problems: because of the strong inclination of the engine, the 5th gear "splash" badly with the oil level. original, and can drop around 250.000 km. Fiat also recommends adding a supplement (0,2 l?) After filling the level.
The moment therefore seems well chosen for this modification ...
To absorb the extra torque, if possible, would I use a gearbox designed for a more powerful engine (110CV)? If of course the housing is identical ...
Another problem: the diameter of the wheels is different from one box to another: it might be interesting to choose a box intended for less tall tires, but the information on the meter will be distorted ... I don't know what what would the technical controller think if he realizes it? And I'm not talking about the insurer ...
Those of 806 are 205/75/15 (additional number 94T)
- diameter 64.75 cm
- rolling circumference 203.42 cm
source
NB: for the circumference, the manufacturer gives 1970, i.e. -3% ...
Okay, I'm going: RTA 806, p 118 and 69:
:
* 5th gear: 1,4838
* Bridge ratio: 0,2203
* Total reduction: 0,3269
* Speed for 1000 rpm: 38,63 km / h
If on your side you have an RTA or Haynes review of a PSA model (ex: 406, Xantia ...), it would be nice to indicate the corresponding values to me. thank you in advance
