Hy guys, it's been a while... nice to see so manny projects finished and on the way...
How did you manage the igniton part of the build? turbotechnics, mosselman or custom... Fuel mangement is important, and as I've uderstood, below 1bar of boost, the CIS-E is still upto it, with a piggy-back support. But what about ignition?

__________________
oasis-it's good to be free...

welcome back, well been calling Mosselman shop on regular basis, and been told (and proven to be true when i drove the car) that since the compression is just 9.2 and since i am only running 0.45 bar boost, the ignition as stock is ok. just set the R16 to either "7" or S position, 1 is a big no no, ping will occur at high revs just check my vid, u can hear it when i hit 5500 rpm in second gear, even on part throttle. as for fuel, a map sensor with a small microchip on it thats set to switch the EHA to flow more when boost is on is enough, tomorrow ill be tuning the car with a wideband, so ill let u know the exact settings ill be using.

BTW i doubt the CSI-E can cope with more than 0.6 bar boost, i know that VW golfs with a somewhat similar system hit trouble at 0.7 bar. but maybe mercs are a bit better.
will be costly to find out

I woud like to test it first, see if it can hold at 8psi, on stock, with piggy-back... I'm still researching the aftermarket systems, for higher boost down the road. Megasquirt is temting, with Edis... Will have to see how well it handles in the first stage!
Anyway, really nice to have someone to talk to about this.

__________________
oasis-it's good to be free...

as promised this is to update you all regarding my kit install.
One of the turbos has been completely rebuilt with a new turbo shaft and a Major rebuild kit bought from Melett company from the UK, this turbo also had a stuck wastegate which was replaced by one from another turbo i managed to locate locally.I haven't managed to thoroughly test the car yet, but during my short runs i can confirm that sofar the lowest boost i can run is 0.5 bar in first and second (wastegates set to maximum opening by the adjustment screw), as for third gear i still have no runs to check if the boost will stick to 0.5 bar or if it will increase to 0.6+.
I fear that that the wastegate of the second turbo is not functioning properly, that is it might be stuck open, as i have the feeling the turbos have more lag than they should.
This install has turned out to be one headache sofar, and i know its not due to the original design of the kit but rather to the age of the turbos and the fact that they were not used for a very long time.
I still have no firm data if the fueling is enough, but on a sad note the car sofar is not as fast as i want it, and now since the boost is much lower than when i first drove the car (video link in the first page of this thread) power is also less . i still have a few ideas regarding the fine tuning. i just hope it turns out worth it.

really sad to hear that (read...), and hope it all works out!
these things are never easy, so press on...
looking forward to some pull vids and numbers man, fingers crossed!

__________________
oasis-it's good to be free...

thanx, vids coming soon. on monday ill be testing the fuel and timing setups so i guess i'll have a vid showing some pulls. any ways i might opt to install a dumpvalve and set it to bleed boost above 0.55 bar, that way i can work the turbos abit harder so they provide more puff low down for better pickup.
let me know what u think....

Sorry guys for not providing vids yet . Drove the car yesterday and power is on the ok side, strangely the turbos can hardly be heard unless your going full on. Any ways I can confirm that the EHA ie CSI-E system can hold on boost level of 0.55 bar with ease which is nice. On a sad note seems I blew my old and tired head gasket (to be honest I never had faith it would last this far). Any ways will know in the coming days of whats wrong exactly.

Argh guys, been pushed till next Monday before we can have any work done on the car. My mechanic also provides rally support to some teams in the Middle East, so now he’s in Jordan for this weekends WRC event. Good for him bad for me Lol.

Piece of advice.
The tuning of a turbocar should either be done by someone familiar with them and preferably on a chassis dyno.
There´s tremendous amount of both power and function to be had from this.
No matter if the system is old.

When it comes to headgasket,stay stock i say.
Point being that the HG under these circumstances are sort of an engine life saver.
IOW,if things go astray the HG is easy and cheap enough to change in contrast to "other options".

One thing that can be of advantage tho is swapiing the OEM headbolts for more "mundane",common 12.9 ones.
Reason being that the OEM headbolts indeed lose a little torq over time,and installing 12.9 bolts will set YOU in control of head torq.Ie;you need to retorq after run in,and that way can be guaranteed that headtorq stays as set over time.
I´ve personaly seen OEM merc stretch ones losen at as little as 40Nm.

thanks ur input man.
On a side note, been driving my dad's 1984 w126 500sel euro and i must say i am impressed. this car has entertaining handling for starters and boy is it ready to pick up its heavy ass and sprint. especially with its long diff (2.24) highways is where it shines easily topping 130-140 mph on a relaxed rpm. too bad it needs a petrol station to run though, been driving this car for just over a month now and it might end up setting me back a fortune in fuel bills

Don't know your guys' thoughts on copper head gaskets, but there's a place, headgasket.com, says he'll make them for only about $110 for a 104 engine, IIRC. Seems to be pretty respectable. And obviously the price is pretty competitive.

As "Racing" said i'd rather have the HG blow than any other major part,
but yes i have heard and seen them used with stunning results.
Thing with copper HG's: copper is soft and can withstand the heat, thus usally its seals perfectly and sometimes so perfectly if ur setup is lean it wont leak or burn and u wont know before ur pistons have shrunk
But on a good tune they help.

Nice work guys. Enjoy it. That Mosselmen kit seams very well thought out twin turbos on a 3.0 liter with under 1 bar boost must be very responsive and it all seams to fit in one nice neat professional looking package.

John Roncallo

Well today my mechanic got back from the WRC Jordan event, and he got round to checking my car. So turns out ( so far and fingers crossed ) nothing is wrong with my engine's head gasket, but turns out my radiator is completely clogged up and it had to come off and sent to a specialist. We also checked the spark plugs of each cylinder and all seem fine but running slightly lean. anyways tomorrow i get to take the car home and we can start proper fuel tuning and set up.
will keep u posted guys, and thanks for all the help and advise.