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Hey Guys long time! After many years I have done this with EGS51. It took years of research on the forums but I finally got it done. They said it couldn't be done blah blah blah.
3 steps to make this happen.
1. Get your TCU from the C43 and plug it into your E55 to see if the car starts. If it starts you're good. You just need to buy another TCU of the same year.
2. The C43 redline is higher than the E55 at 6300 rpms. E55's redline at 6000. The rev limiter is inside the TCU and ECU. You have to get your ECU tuned to raise the rev limiter. It will still run but you will be bouncing off the rev limiter at WOT which is violent and not good for the car. This is also why the e55 motor makes more horsepower when C43 guys go 5.5. When they use the e55 tune it dynos with less HP.
3.Install the diff.
To recap. You need the C43 TCU, ECU tune and Diff from an early C32. Also note* my car TCU is 3.07, my diff is 3.06 and it makes no difference.
I used the diff from a C32 3.06 ratio. (earlier years have the bolt on axles some don't so be ware you may have to swap the output shafts on the diff). It bolts on with earlier models, the only change you have to make is the yoke, which is a 3 bolt so you use the 4 bolt flange from your E55 on it.
Hey Guys long time! After many years I have done this with EGS51. It took years of research on the forums but I finally got it done. They said it couldn't be done blah blah blah.
3 steps to make this happen.
1. Get your TCU from the C43 and plug it into your E55 to see if the car starts. If it starts you're good. You just need to buy another TCU of the same year.
2. The C43 redline is higher than the E55 at 6300 rpms. E55's redline at 6000. The rev limiter is inside the TCU and ECU. You have to get your ECU tuned to raise the rev limiter. It will still run but you will be bouncing off the rev limiter at WOT which is violent and not good for the car. This is also why the e55 motor makes more horsepower when C43 guys go 5.5. When they use the e55 tune it dynos with less HP.
3.Install the diff.
To recap. You need the C43 TCU, ECU tune and Diff from an early C32. Also note* my car TCU is 3.07, my diff is 3.06 and it makes no difference.
I used the diff from a C32 3.06 ratio. (earlier years have the bolt on axles some don't so be ware you may have to swap the output shafts on the diff). It bolts on with earlier models, the only change you have to make is the yoke, which is a 3 bolt so you use the 4 bolt flange from your E55 on it.
Hi mate
did you find it made a noticable difference changing to the 3.06:1 ratio?
did you find it made a noticable difference changing to the 3.06:1 ratio?
Absolutely! The motivation for doing it was that the w209 clk55. 0-60 was like 4.6 seconds. Which is faster than the w208 clk55 even though the w209 is heavier. Then I found out it has the better gear ratio. That's not the only reason but it is one of the main ones that it is faster.
Absolutely! The motivation for doing it was that the w209 clk55. 0-60 was like 4.6 seconds. Which is faster than the w208 clk55 even though the w209 heavier. Then I found out it has the better gear ratio. That's not the only reason but it is one of the main ones that it is faster.
My C43 has a 5.4ltr in it and it is WAY quicker than my E55
Absolutely! The motivation for doing it was that the w209 clk55. 0-60 was like 4.6 seconds. Which is faster than the w208 clk55 even though the w209 is heavier. Then I found out it has the better gear ratio. That's not the only reason but it is one of the main ones that it is faster.
Engine has close to 380,000 on it now, it blows a bit of smoke at wide open throttle.
If i knew which chip stored the data in the trans controller i could copy the C43 chip and solder in a replacement into the E55 controller.
For a model year 2000 car the TCU is only about $200-$300 from mercedes, but It comes blank for that price. You have to have someone with a c43 tcu transfer their data to it. For earlier models you can literally just buy used online. 2000 model c43s are extremely rare but I have a 2000 e55 with tiptronic so I needed that one.
For a model year 2000 car the TCU is only about $200-$300 from mercedes, but It comes blank for that price. You have to have someone with a c43 tcu transfer their data to it. For earlier models you can literally just buy used online. 2000 model c43s are extremely rare but I have a 2000 e55 with tiptronic so I needed that one.
I allready have both cars though, i can very easily remove and replace a surface mount IC if i knew which one it was!!
So how would the process differ with a EGS52? Is that where the blank TCU comes in? Also having been a Mustang guy since the Fox body I completely understand the dramatic difference gear changes can make. My big question is, the car can’t get traction off the line to save its life. Doesn’t the ratio change exasperate this problem? As always, nice to see people still attempting some home brew performance upgrades.
So how would the process differ with a EGS52? Is that where the blank TCU comes in? Also having been a Mustang guy since the Fox body I completely understand the dramatic difference gear changes can make. My big question is, the car can’t get traction off the line to save its life. Doesn’t the ratio change exasperate this problem? As always, nice to see people still attempting some home brew performance upgrades.
i have no trouble with traction, sticky Michelin Pilot Sport and a bit of throttle control go a long way.
Traction is an issue in 1st. And it gets worse but the car is overall quicker and more responsive. Also 2nd gear is my favorite now with redline being higher it sings. As far as EGS52 They are programmable to any mercedes ratio you want. So you can take an egs52 unit and program to what you want. I wouldn't go lower than 3.07 as 1st becomes pointless.
I tried taking out the spare to save weight but traction was too much of an issue. I dont have sticky tires on it so that doesnt help. I ended up putting the spare back as it also affected ride quality. I usually dont fill up the tank either so it made the rear of the vehicle bouncy and unsettled.
Traction is an issue in 1st. And it gets worse but the car is overall quicker and more responsive. Also 2nd gear is my favorite now with redline being higher it sings. As far as EGS52 They are programmable to any mercedes ratio you want. So you can take an egs52 unit and program to what you want. I wouldn't go lower than 3.07 as 1st becomes pointless.
I tried taking out the spare to save weight but traction was too much of an issue. I dont have sticky tires on it so that doesnt help. I ended up putting the spare back as it also affected ride quality. I usually dont fill up the tank either so it made the rear of the vehicle bouncy and unsettled.
Get sticky tyres, traction has never been an issue for me, unless the road was damp. Even in my 99 C55 it isnt really an issue, although it will spin the wheels a lot easier than the E55 will.
Are you saying you can use an EGS52 controller in a 99 model car that uses the older EGS unit?
Traction is an issue in 1st. And it gets worse but the car is overall quicker and more responsive. Also 2nd gear is my favorite now with redline being higher it sings. As far as EGS52 They are programmable to any mercedes ratio you want. So you can take an egs52 unit and program to what you want. I wouldn't go lower than 3.07 as 1st becomes pointless.
I tried taking out the spare to save weight but traction was too much of an issue. I dont have sticky tires on it so that doesnt help. I ended up putting the spare back as it also affected ride quality. I usually dont fill up the tank either so it made the rear of the vehicle bouncy and unsettled.
No traction issues to speak of here, even though it was still a 43 at the time, this was on old Pilot Sports and still 17" stock size:
No the egs52 unit won't work in a 99. If you have ME2.0 then its EGS51, if its me2.8 then you can use egs52 tcu. If it's a 99 e55 you can use a 98 or 99 c43 tcu when you do the ratio swap to 3.07/3.06. If you have a c43 there is no other ratio to go to. 3.07 is the best option without tons of custom work.
But if you had a newer w210 like 2002. You could send your tcu to a tuner and they can program a different mercedes ratio in for you. Hope this helps. My car has bigger injectors 283cc, modified intake, shorty headers, and a tune along with the ratio change so my traction issues stem from that. Also w210s have a steep rake with no weight in back. So when removing the spare or running on a 1/3 of a tank it naturally creates more wheel spin in a nose heavy car. You can tell the engineers wanted to offset this with where the battery is. My suspension is the stock setup right now. If I evened out the ride height front and back it would help, but I have a steep garage threshold so then I'll be scraping up the bottom of my car. It's a work in progress
6spd, any particular reason you changed the injectors? I thought they were good up to anything short of forced induction. Also was it the actual Manifold that was modified or the Airbox? If Manifold what sort of modifications? Cheers!
6spd, any particular reason you changed the injectors? I thought they were good up to anything short of forced induction. Also was it the actual Manifold that was modified or the Airbox? If Manifold what sort of modifications? Cheers!
For 99-2000 model year the injectors were undersized for the displacement at 224CC? I cant remember the Original size but I used an old school online calculator which accounts for engine size/duty cycle etc.. But 2001 and up 5.4 m113s use 283cc injectors which are beige. You can safely upgrade them with out a tune as the ecu can adapt. I was just looking to make sure all my upgrades worked well together.
I just used an airbox from an e430 as the e55 airbox bottlenecks in back. I alternate between an open filter setup or 430 box if I want it to be quiet and smoother. Open filter is better for high end but i find response better with the 430 box. I havent modified an intake mani yet, but I would love to. I'm just not that experienced in terms of porting and polishing.
Hey guys, gonna bust in on this conversation quick. I just got done throwing an E320 diff. in a E430. Just wondering exactly what I need to make it happy. I test drove it quick(knowing it probably would complain) but it works shortly and then reverts to limp mode shortly after. But I can get a good rip through the gears after a restart. Just had to feel the difference asap hah. Anyways, can I just throw a E320 TCU in? or is there more I need to do? Not sure I can just get it tuned at the dealer for gear ratio being a 1998 car. Thanks for the help! Pic for attention... you may have seen pics of it floatn around the web, you can see why I could use some 3.07 gears.
Hey guys, gonna bust in on this
conversation quick. I just got done throwing an E320 diff. in a E430. Just wondering exactly what I need to make it happy. I test drove it quick(knowing it probably would complain) but it works shortly and then reverts to limp mode shortly after. But I can get a good rip through the gears after a restart. Just had to feel the difference asap hah. Anyways, can I just throw a E320 TCU in? or is there more I need to do? Not sure I can just get it tuned at the dealer for gear ratio being a 1998 car. Thanks for the help! Pic for attention... you may have seen pics of it floatn around the web, you can see why I could use some 3.07 gears.
Is that your car in the SIG pic? If so that thing is SICK! If you have a 98 e430. You will need a 98 or 99 c43 tcu. Ebay is probably best. Then you will need an engine tune to raise your rev limiter to 6300. I had OE tuning do mine. After that you're done. It will run ok without the tune but at WOT you will hit the limiter.
12-25-2018, 07:37 AM
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