My w124 M103 e300 finally has the mosselman kit istalled - Page 4 - PeachParts Mercedes-Benz Forum

JayRash · #46 05-12-2008, 04:08 PM

Quote:

Originally Posted by RBYCC

You should be reading about .85 Lambda under boost to prevent detonation and get max power.

I still run the stock dual pumps as they provided sufficient fuel pressure.

What fuel pressure are you seeing....did you check the total full supply loop including the return.

Unfortunately i still havent measured fuel pressure and installing the gauge wont be easy as the the top mount intercooler makes for a tight fit. I will do so on
Friday as i am taking a day off from work. But can i bother u with an explanation regarding what u mentioned abt full supply loop test?

JayRash · #47 05-13-2008, 07:34 AM

I will be testing the use of the cold start injector at boost above 0.4 bar to see how it goes, so what do u think RBYCC? will it work?
as u can see i am still looking for the quickest way out here

and its all due to lack of time.

RBYCC · #48 05-13-2008, 01:53 PM

Quote:

Originally Posted by JayRash

Unfortunately i still havent measured fuel pressure and installing the gauge wont be easy as the the top mount intercooler makes for a tight fit. I will do so on
Friday as i am taking a day off from work. But can i bother u with an explanation regarding what u mentioned abt full supply loop test?

If you look at your fuel pressure regulator it has a return line to the tank.
The regulator if working maintains between 5,3 - 5.5 bar ( 77-78 psi ).
Internal is a spring loaded diaphragm that returns excess fuel to the tank during rapid load change.

If the spring in the regulator is weak, you may be seeing a pressure drop under boost.

RBYCC · #49 05-13-2008, 01:55 PM

Quote:

Originally Posted by JayRash

I will be testing the use of the cold start injector at boost above 0.4 bar to see how it goes, so what do u think RBYCC? will it work?
as u can see i am still looking for the quickest way out here

and its all due to lack of time.

Are you going to completely bypass / disconnect the stock control for the cold start injector and use it as an additional injector ?

JayRash · #50 05-13-2008, 03:22 PM

Quote:

Originally Posted by RBYCC

Are you going to completely bypass / disconnect the stock control for the cold start injector and use it as an additional injector ?

yes my friend, at least for the time being as for testing to see if it will be enough. so any thoughts?
I have a very good Bosch trained mechanic (in 1998 he was ranked no.4 world wide by bosch for repairing injection systems including cis) i still haven't used his resources due to the fact that he is extremely busy. but i think he might have some ideas, maybe installing a larger fuel distributor like the one on the audi 200 turbo which uses exact same injectors as in my car. i am in favor of such an idea as it will greatly cut working on building electronic boards.

RBYCC · #51 05-13-2008, 05:27 PM

Quote:

Originally Posted by JayRash

yes my friend, at least for the time being as for testing to see if it will be enough. so any thoughts?
I have a very good Bosch trained mechanic (in 1998 he was ranked no.4 world wide by bosch for repairing injection systems including cis) i still haven't used his resources due to the fact that he is extremely busy. but i think he might have some ideas, maybe installing a larger fuel distributor like the one on the audi 200 turbo which uses exact same injectors as in my car. i am in favor of such an idea as it will greatly cut working on building electronic boards.

You're in a warm climate, so your cold start valve rarely operates and when it does it is activated for only about eight seconds.

Not sure of its output and continuous pulse capabilities but the location may allow you to add an additional injector.

The real question is if you can achieve a fairly equal fuel distribution from this location.

If you can, then control it with a stand alone injector controller which will pulse based on RPM and boost...I use the Split Second AIC1 unit, about $350.00 USD to control two additional injectors.

JayRash · #52 05-13-2008, 06:42 PM

Quote:

Originally Posted by RBYCC

You're in a warm climate, so your cold start valve rarely operates and when it does it is activated for only about eight seconds.

Not sure of its output and continuous pulse capabilities but the location may allow you to add an additional injector.

The real question is if you can achieve a fairly equal fuel distribution from this location.

If you can, then control it with a stand alone injector controller which will pulse based on RPM and boost...I use the Split Second AIC1 unit, about $350.00 USD to control two additional injectors.

]
Well thats my worry especially abt pistons 1 and 6 being farthest from this injector especially since this injector is only designed to run for cold starts meaning spray pattern is surley not perfect. As i said i only want to test the idea. As for the split unit, well i will need to machine fit the extra injectors and getting the unit delivered here will end up setting me at least 600 usd when u factor in taxes here along with delivery. Any ways its seems i will go ur trusted way if all other options fail but that means more trouble for u too.

as i will need help from u to where to connect the fuel feed lines and the ecu lines.
Once again i have to thank u for all ur help man.

RBYCC · #53 05-14-2008, 08:23 AM

Quote:

Originally Posted by JayRash

]
Well thats my worry especially abt pistons 1 and 6 being farthest from this injector especially since this injector is only designed to run for cold starts meaning spray pattern is surley not perfect. As i said i only want to test the idea. As for the split unit, well i will need to machine fit the extra injectors and getting the unit delivered here will end up setting me at least 600 usd when u factor in taxes here along with delivery. Any ways its seems i will go ur trusted way if all other options fail but that means more trouble for u too.

as i will need help from u to where to connect the fuel feed lines and the ecu lines.
Once again i have to thank u for all ur help man.

If you go the additional injector route then consider the Split second controller.
It is fully stand alone and does not interface with the ECU or any stock system.

The control is self contained including a MAP sensor.
Vacuum connection to the unit along with +/- 12V, speed signal which can be taken from the tach signal at the fuel pump relay,and the harness out to the injectors.
Very small...

You might want to contact Hughes of Beaconsfield, a UK Merc dealer to see if they have the additional injector assembly that I posted a picture of still available. You would also need the deflector that mounts in this assembly.

The design is extremely effective and it is located between the air valve and throttle valve, replacong the rubber connector boot.
It gives great fuel distribution and is well designed.

JayRash · #54 05-15-2008, 12:31 PM

to RBYCC: well, tomorrow ill be installing a larger injector distributor than the one i have. The bosch trained mechanic will be finalizing he fuel issue, incidentally this guy back in the early nineties converted his w124 e300 from 3.0 to 3.6 l and then slammed on it a single turbo boosting 0.7 bars and ran it reliably using the cis system without using any additional injectors. so my hopes are a bit high for now, although i still feel the way ur kit is running is still one of the best options. any way tomorrow I'll have more concrete info. fingers crossed.

--
Jay

JayRash · #55 05-15-2008, 01:08 PM

RBYCC can i bother u to check for me the color of the plaque on ur fuel distributor? Is it red or black? For it seems the red ones are more economical of the 2. Dunno if that will make such a diff. But it might be the cause of my troubles since mosselman engineer assures me my car should run fine by just properly setting the eha. Mine is with the red one.:-(

RBYCC · #56 05-16-2008, 08:22 AM

Quote:

Originally Posted by JayRash

RBYCC can i bother u to check for me the color of the plaque on ur fuel distributor? Is it red or black? For it seems the red ones are more economical of the 2. Dunno if that will make such a diff. But it might be the cause of my troubles since mosselman engineer assures me my car should run fine by just properly setting the eha. Mine is with the red one.:-(

Not sure what you mean by "plaque".....I show nothing black or red on my fuel distributor...

JayRash · #57 05-16-2008, 11:39 AM

Quote:

Originally Posted by RBYCC

Not sure what you mean by "plaque".....I show nothing black or red on my fuel distributor...

my bad man, i am talking abt the metal identity card on the distributor. i think it should be on the opposite side from this pic. any ways i couldn't find a black label distrb but i found a blue one and boy is the car 's top end better. unfortunately my downpipe is a bit loose now and thus lambda wont read properly. but i think i am on the right course here. although i have to admit the car is still not as fast as i wanted and the top mount intercooler is a piece of **** for cooling. if anything its a heater lol. oh and my gearbox is refusing to let go before 7000 rpm and when it shifts it seems to be slipping a bit. but then again its a 370000 km unit and ill be rebuilding it to the E500 specs box.
--
Jay

JayRash · #58 05-17-2008, 12:12 PM

Well here is a short full throttle run:
http://www.youtube.com/watch?v=oPcL0hqCngc
Spin is an issue, then there is the slow shift into third and same for fourth. the box wont last if i dont get this prob sorted soon. oh and the car is still a bit lean in the top end and especially in fourth. but getting there

RBYCC · #59 05-17-2008, 03:41 PM

Quote:

Originally Posted by JayRash

my bad man, i am talking abt the metal identity card on the distributor. i think it should be on the opposite side from this pic. any ways i couldn't find a black label distrb but i found a blue one and boy is the car 's top end better. unfortunately my downpipe is a bit loose now and thus lambda wont read properly. but i think i am on the right course here. although i have to admit the car is still not as fast as i wanted and the top mount intercooler is a piece of **** for cooling. if anything its a heater lol. oh and my gearbox is refusing to let go before 7000 rpm and when it shifts it seems to be slipping a bit. but then again its a 370000 km unit and ill be rebuilding it to the E500 specs box.
--
Jay

NOW I KNOW WHAT YOU MEAN !!!

Mine is also red, believe the Bosch P/N ends in 012....
I bought the car new in May of 1988, and this is the original fuel distributor...

JayRash · #60 05-17-2008, 05:12 PM

Quote:

Originally Posted by RBYCC

NOW I KNOW WHAT YOU MEAN !!!

Mine is also red, believe the Bosch P/N ends in 012....
I bought the car new in May of 1988, and this is the original fuel distributor...

if u have checked my vid, can u tell me how it compares to ur car?
do u have some vids?
i am convinced u have alot more power and i am seriously considering ur injector setup.