Bosch CIS in the '90 CE DOHC 3.0 vs. the SOHC M103
06-11-2007, 07:37 AM
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300TE / 300E / 300CE
Bosch CIS in the '90 CE DOHC 3.0 vs. the SOHC M103
Anyone know the difference between the Bosch CIS in the '90 CE DOHC 3.0 vs. the standard M103?
I plan to transplant my RENNTech SOHC 3.6 rom my wrecked 300E into it. I only know of the ICM is different...
Are the transmissions the same?
I plan to transplant my RENNTech SOHC 3.6 rom my wrecked 300E into it. I only know of the ICM is different...
Are the transmissions the same?
06-11-2007, 08:27 AM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
The 1993-1995 M104-24V used the Bosch HFM-SFI electronic system.
If you don't have a MAF ( mass air flow sensor ) before your throttle body, then you have the early KE-Jetronic III.
06-12-2007, 09:03 AM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
M103 from 9/86 to 8/92 were KE 3.1, M104 from 9/89 to 8/92 were KE 5.2.
M103 Control unit # 0 0280 800 216 used until 8/87.
From 9/87 on control unit was # 0 280 800 256.
M104 used # 0 280 800 376 until 8/90, the from 9/90 on used # 0 280 800 422.
The KE 5.2 added a Knock Sensor.
Problem with the OP is that he is going to install a Renntech 3.6 which requires the Renntech control unit.
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06-12-2007, 11:03 AM
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300TE / 300E / 300CE
06-12-2007, 12:23 PM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Make sure that I understand what you're doing.
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
06-12-2007, 12:29 PM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
No real electronics to fiddle with, which in a way is a good thing in an older vehicle
06-12-2007, 02:55 PM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Factor in inflation and it was a whole lot more then what a new E Class sells for now.
For a young guy, it's a great and classy boulevard cruiser................
06-12-2007, 09:00 PM
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Mercedes benz 1991 300ce(RIP), now an 89 300ce
Make sure that I understand what you're doing.
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
3.6 liter renntech only pushing 225 hp? seems almost worth it just to get the 3.2l m104, which pushes 220, right? what did the renntech cost back in the day?
06-12-2007, 11:40 PM
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88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Price doesn't include installation.
That was as of last year.
Based on those prices I went with the twin turbo which ended up a bit less, but with greater power output.
Oddly enough even though the numbers are similar to the later 3.2L M104, I would put my money on the worked M103.
M103's even stock aren't that slow, very flat torque band that comes in earlier then the M104 variants
06-12-2007, 11:53 PM
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Woi. Expensive. Does renntech do a complete rebuild of the engine when it tunes? I assume they must right? So wouldnt that, theorhetically atelast, add years to your engine plus the added benefit of more performance?
06-13-2007, 01:20 AM
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Make sure that I understand what you're doing.
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
You have a Renntech SOHC 3.6, which is based on the M103?
If so it's either the performance package 1 with 225HP/234LB-FT torque or the package 2 with cam and ported/polished head with 255Hp/264Lb-Ft torque.
Your 300E that it came out of and was running at one time with no problems has a "EZL" unit which is the "pea-brain" of the M103 and a "KE Control" unit which manages the fuel system.
I would transfer whatever you had from the Renntech install as the KE Control unit was probably modified by Renntech to deliver more fuel to the injectors via the EHA.
MY comments are based on what it appears you are trying to do
From what I understand, they use a unique crankshaft. The rest is typical performance parts and engine building. I think they start with a 3.2 block since the oil filter is cartridge type. Since it's SOHC it must be a M103 head.
