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-   -   My w124 M103 e300 finally has the mosselman kit istalled (http://www.peachparts.com/shopforum/mercedes-benz-performance-paddock/218549-my-w124-m103-e300-finally-has-mosselman-kit-istalled.html)

JayRash 04-05-2008 04:56 PM

My w124 M103 e300 finally has the mosselman kit istalled
 
Yup finally did it, had the kit for years yet never had the guts to go through with it. Now its almost done
http://www.youtube.com/watch?v=wdZaz-R5IJw
any ways can any one advise me where to find forged pistons for this engine?
site links highly needed.

RBYCC 04-07-2008 01:17 PM

Quote:

Originally Posted by JayRash (Post 1815182)
Yup finally did it, had the kit for years yet never had the guts to go through with it. Now its almost done
http://www.youtube.com/watch?v=wdZaz-R5IJw
any ways can any one advise me where to find forged pistons for this engine?
site links highly needed.

Not good starting it and running the turbos without a filtered intake air.
Pull in a bit of dirt and you lose your compressor.

Why do you want forged pistons?

JayRash 04-07-2008 03:22 PM

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

300EVIL 04-07-2008 10:26 PM

Quote:

Originally Posted by JayRash (Post 1817000)
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.

JayRash 04-08-2008 02:34 PM

Then i wont man, will install a new orginal set with all that needs to go with the rebuild, boost it to 0.5. As u can see from the vid traction is an issue on our roads.
thanx man

300EVIL 04-08-2008 05:08 PM

Quote:

Originally Posted by JayRash (Post 1818254)
Then i wont man, will install a new orginal set with all that needs to go with the rebuild, boost it to 0.5. As u can see from the vid traction is an issue on our roads.
thanx man

Is their something wrong with the current pistons? I wouldn't consider replacing them unless they are cracked or extremely worn from infrequent oil changes. Now, If your cylinders need to be bored and honed that's a different issue. I have personally taken apart a few M103's with almost 300,000 miles on them and all the pistons have come out looking great.

I guess my question is what makes you believe the bottom end needs any work at all? Bad compression?

JayRash 04-09-2008 03:05 AM

man during the kit install and while the oil pan was off we did check the big, small bearings and the rods and all were in v good condition. Thing is the engine crankcase vent has some smoke puffing out on high revs. So thats y i want to rebuild.

300EVIL 04-09-2008 11:26 AM

Quote:

Originally Posted by JayRash (Post 1819053)
man during the kit install and while the oil pan was off we did check the big, small bearings and the rods and all were in v good condition. Thing is the engine crankcase vent has some smoke puffing out on high revs. So thats y i want to rebuild.

All forced induction engines are going to have "some" blow-by. Now if a smoke screen is gushing out, that's probably not a good sign. I'd suggest you run a compression test to see if your rings are up to par. If you really want to tear down the engine and rebuild it, go ahead, it definitely wouldn't hurt. However, you may be trying to fix something that's working just fine.

RBYCC 04-09-2008 03:15 PM

Quote:

Originally Posted by JayRash (Post 1817000)
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

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 ?

JayRash 04-10-2008 12:31 PM

thanx guys, will keep u posted for sure
did u check the vids?
car is promising to be very fast.

Ortolan 04-12-2008 01:04 PM

Quote:

Originally Posted by RBYCC (Post 1819569)
[COLOR=navy]
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 ?

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.

RBYCC 04-12-2008 06:09 PM

Quote:

Originally Posted by Ortolan (Post 1822279)
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.

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.

JayRash 04-13-2008 04:11 AM

Guys, what HP numbers do your cars have? and what boost are you running guys? Both of you :)
by the way one of the KKK K16 tubos needs a rebuild :(, tomorow i'll be ordeing a rbuild kit and a tuboshaft from Melett (UK).
Thanx guys

Ortolan 04-13-2008 08:07 AM

I run 14psi of boost and I was making 272rwhp prior to breaking the new engine in. Once the new turbos are on and I can rev higher, I would expect around 350rwhp at the same boost and 400 or so with an overboost setting. The torque will be immense. :cool:

I think I've got Bridgestones on 17x7.5 up front and Sumitomos on 17x8.5 at the back. Had to roll the fenders all around and run negative camber on the rears.

RBYCC 04-13-2008 04:53 PM

Quote:

Originally Posted by JayRash (Post 1822881)
Guys, what HP numbers do your cars have? and what boost are you running guys? Both of you :)
by the way one of the KKK K16 tubos needs a rebuild :(, tomorow i'll be ordeing a rbuild kit and a tuboshaft from Melett (UK).
Thanx guys

Initial pulls on a Mustang load dyno was 195 HP / 220 lbft torque versus stock baseline of 135 HP / 145 lbft torque ( 1988 published figures for a USA spec M103-12V was 177 HP / 188 lbft torque so a 30% drive train loss )
Twin Garrett T2's set at a fixed 7 PSI +/- .


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