i am doing a rebuild anyways so i thought forged will keep trouble away.
Do u know for what HP the original pistons are good for? will they take like 0.55 bar boost?
check this by the way:
http://www.youtube.com/watch?v=DDFJZTeKbR4

If you only plan on running .5 bar of boost, your fine with a stock bottom end. Forged pistons are a good way to go but compression ratio is a more important factor when running boost. Your stock M103 is at 9.2:1 CR which should handle 8 psi without any problems. The stock pistons are a very tough cast alloy and will handle a good beating. Don't waste your money or time on pistons unless you are looking for 1 bar + boost.

__________________
Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320

No problem with the .55 bar boost on a stock engine in sound condition.
The turbos supplied in the Mosselman kit were fixed at around .5 bar boost.
Did you install the full kit including the supplied electronics?
You want to make sure through the Mosselman engine/fuel management that you set your air fuel ratios to around .85 Lambda as you don't want to lean out under boost.

There was an article in the August 17, 1987 Autoweek written about the man who did my recent TurboTechnics install.
Willy Mosselman stated in that article that the USA installer made the M103-12V go faster then he could.
With a 3.64:1 rear the 0-60 was 4.96 and the 0-100 was 11.98.

My TT 300CE M103-12V TT with the stock 3.07:1 rear runs 0-60 in the low to mid 5 second range and two weeks ago in 40F ran a 14.39/98.68 1/4 mile with no traction off the line.
With traction I should see mid 13's and 100mph +

Who needs a V8 when you can have a 3.0L torque monster ?

__________________
http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES

Ed, you should get some wide rubber on your 300CE. I tried full throttle power braking with my car a few nights ago just before moving to Toronto and it was very stable launching at 5000rpm. Pretty good hook up, not much sideways wriggling. Only starts spinning the tyres above 4000. I'm running 255 rear and 225 front. I really need to get the GT25 turbos on. These T2 units mean that I can't actually rev past 5000 so I can only do 0-100km/h in just under 6 seconds (in 20*C heat) currently. With another 2500rpm to play with I'll be able to slash at least a second off that time.

__________________
1989 300CE "Project HWA124"
(400rwhp Turbo Technics AMG C36 engine)

BJ

I run 225/40-18 Falken FK-452 all around.
Great all around tire for road use, but lacking in ability to accelerate from a dead stop.

The day was cold and windy and I had dropped the pressure to 24PSI hoping for traction.
First run tried to launch at 2000 rpm and smoked both tires for about an 1/8 mile until they hooked up.
Results were a 19.721, but an encouraging 89.83 mph trap speed.
The 14.392/98.68 pass was basically idling off the line and trying to maintain traction.

When it warms up a bit I'll try with 32psi and varying launch techniques.

What brand tires are you running and what width rims do you have the 255's on ?
Did you roll the wheel arch for clearance?

Ed A.

__________________
http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES

I bot the 1986 300 E that was written up in the Aug 17 1987 Autoweek article from a friend 2 years ago. It had 69K on it... now has 80K. It continues to be servived by the orginal tuner, Brian Murphy of Willow Automotive in Chicago, IL. Fortunately for me, I have little reason to "visit" with Brian as the car has been very reliable. I drive it May thru November and really enjoy it. It's quite fun .... and quick. I am considering rebuilding the turbos this year, more as a precaution than out of necessity. I really enjoyed reading thru this post. I will post a few pics after the holidaze....

cooool, well my car has just crossed the 237kmiles today, and with that some 13k miles atleast after the kit install.
and am still on the original autobox and engine bar the head gasket issue,.

waiting ur pics

__________________
Jay,
-----------------
-1995 Blue W202 C36 AMG (M) SOLD ;(
-1995 Black W140 S500 (Lady)
-1992 Black W124 E300 (Dima) (Ex-Mosselman
Twin turbo Kit).
-1988 Black W124 300 E 4-Matic.(Nadeen)
-1983 Brown W126 500SEL.(Old Lady)(Sold)
-1981 Gold W123 280CE.(Dareen)(Sold)
http://www.youtube.com/user/jayrasheed

Merry X-mass all, whish u all the best.
Well an update is due I guess

I have decided to go with an alcohol injection system and should be ordering the coolingmist kit with the Vari-cool and smart injector controller this kit has gr8 potential and several features other than just the alcohol injection. The kit can read several inputs to generate a map for how much and when to inject.

Ill be using rpm vs. boost in setting up the map, my intention to use alcohol is based on several factors. First alcohol has 2 features; it raises octane and thus resistance for detonation and it cools the intake charge which helps in my case with my top mount intercooler and the lack of oil squirt under my pistons. Thus I need to cool my pistons down a tad. Secondly I need the extra alcohol in tuning the few lean spots I have in my tune.

second feature the kit has is the programmable out put triggers, ill use that to trigger the full throttle switch when running on part throttle. The controller can be set to trigger the switch when boost is present and rpm is below say 4500, above that its off. In my case I run lean when on part throttle in that range but fine above 4500 rpm but if I keep the enrichment on car gets very rich above 4500 on.


any way I should be getting the kit here by the 6th of jan 09, and will post the results once installed and running.
kit also has a flow sensor to detect clogged injector and it has several fail safe options, btw with alcohol I should be able to advance my spark which will yield more hp on same boost.

PS now in the cold of winter here (morning temps 7 degrees Celsius) my car is running 0.6 bar boost instead of the usual 0.5 bar

__________________
Jay,
-----------------
-1995 Blue W202 C36 AMG (M) SOLD ;(
-1995 Black W140 S500 (Lady)
-1992 Black W124 E300 (Dima) (Ex-Mosselman
Twin turbo Kit).
-1988 Black W124 300 E 4-Matic.(Nadeen)
-1983 Brown W126 500SEL.(Old Lady)(Sold)
-1981 Gold W123 280CE.(Dareen)(Sold)
http://www.youtube.com/user/jayrasheed

Well waiting for the kit to arrive, i needed to keep my self busy . so i went out got me a used washer pump for less than 10usd connected its power to the already existing pump and now i have intercooler sprays


http://www.youtube.com/watch?v=IpU6RON5wAQ

__________________
Jay,
-----------------
-1995 Blue W202 C36 AMG (M) SOLD ;(
-1995 Black W140 S500 (Lady)
-1992 Black W124 E300 (Dima) (Ex-Mosselman
Twin turbo Kit).
-1988 Black W124 300 E 4-Matic.(Nadeen)
-1983 Brown W126 500SEL.(Old Lady)(Sold)
-1981 Gold W123 280CE.(Dareen)(Sold)
http://www.youtube.com/user/jayrasheed

^Brilliant work been reading this thread for a while-but only just joined this site.
I have a M103 Mosselman TT aswell, the original management has packed up so using the same Split Second unit as RBYCC as recommended by him.(thanks Ed)
Need to source a 2nd hand plenum to get machined to mount the injectors.
How long did it take you to make your plenum out of fibreglass? also what injectors are you using?
and once again brilliant work!

Replace the washer pump with a cheap fuel pump and it will mist which will cool down the intercooler more effectively Its a trick we did to a top mount rx7.

__________________
1997 Mercedes E320 Turbo
Garrett T3/60-1 Turbocharger
Custom Water Intercooler Setup
352rwhp/366rwtq @ 8.6psi in '08

http://img78.imageshack.us/img78/1051/log7smallay9.jpghttp://img66.imageshack.us/img66/740...s3smallox0.jpg