NA 55 vs 55k Internals (pics inside)
05-02-2014, 09:48 PM
#26
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65 Chevelle Wagon w/ C5 frame, 08 ML63, 04 S600, 04 E55,(sold) 00 ML55,(sold) 98 C43-55K Swap
Good call
I've done countless 112/113 rear mains and have never really paid much attention to the bolt pattern. I wonder why they changed it?
I've done countless 112/113 rear mains and have never really paid much attention to the bolt pattern. I wonder why they changed it?
05-02-2014, 09:55 PM
#27
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Good question. I have no idea 
05-03-2014, 07:12 AM
#29
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05-03-2014, 08:02 AM
#30
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And just for fun here's a pic of the NA 55 piston that broke and got lodged in the cylinder the first time an NA 55 motor let go on me. I haven't removed the piston from the most recent one since I'm leaving it in the block when it becomes a table. It adds character lol
Hopefully all this info will help some people in the future and save them alot of time and $$$
Hopefully all this info will help some people in the future and save them alot of time and $$$
05-05-2014, 10:31 AM
#31
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I'm not 100% sure. This was from my first NA block with old setup. It let go when I put race gas in it. But whatever happened then happened again on this new setup with more power.
05-05-2014, 11:09 AM
#32
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M113 E50 6-speed, 2005 E55 AMG
You're right that it doesn't have to do with engine class, but it's model specific as well though. My buddy got a CLS500 engine and the pattern for those changed early 05 where as the C didn't until 06. The Crossfire pattern didn't change until 07.
05-05-2014, 08:28 PM
#33
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05-05-2014, 08:51 PM
#34
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Crown cc
Anybody measure the dish volume of the NA, K, SLR pistons?
Since I have 55k rods/pistons and NA 55 rods/pistons I decided to share with the board what I've found.
Both rods are crack forged. The biggest difference is the oiling port in the NA 55 rod (bottom) which weakens the rod
Notice the difference in wrist pins (NA 55 on top)
The NA 55 (bottom) has higher compression as expected.
NA 55 on right
The 55k pistons look to have really low compression. I have an 06 E55 engine on it's way to me and I will tear it down and put higher compression forged pistons, ARP head studs, and rod bolts in it. This should beef it up a bit. I want higher compression than stock because I want more power per psi and off boost power. I can post differences in the heads, blocks, etc if I get the time. The NA motor was able to hold over 650whp and in my CLK55 was able to trap 138.71 before letting go. I would expect the 55k motor to be able to hold more power but I'm not willing to put the stock 55k motor in my car and risk it blowing up and putting me and the car into the wall.
Both rods are crack forged. The biggest difference is the oiling port in the NA 55 rod (bottom) which weakens the rod
Notice the difference in wrist pins (NA 55 on top)
The NA 55 (bottom) has higher compression as expected.
NA 55 on right
The 55k pistons look to have really low compression. I have an 06 E55 engine on it's way to me and I will tear it down and put higher compression forged pistons, ARP head studs, and rod bolts in it. This should beef it up a bit. I want higher compression than stock because I want more power per psi and off boost power. I can post differences in the heads, blocks, etc if I get the time. The NA motor was able to hold over 650whp and in my CLK55 was able to trap 138.71 before letting go. I would expect the 55k motor to be able to hold more power but I'm not willing to put the stock 55k motor in my car and risk it blowing up and putting me and the car into the wall.
05-05-2014, 09:21 PM
#35
Junior Member
Yes the can be run on a 55k bottom end. I actually bought a set of N/A heads for my build thinking they were the same and found out after having them ported and taking the 55k heads off. My head porter ended up porting a 55k set also and then took a spare set of N/A heads and S/C heads and played with several ports trying things on both and said the N/A head was the way to go in his opinion. I think Ahmad might have pics of the intake ports of both to show the difference. The 55k heads have a raised divider that the n/a heads don't.
05-06-2014, 10:31 AM
#36
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I haven't but thos ethat have have said the c/r is lower than advertised.
I posted a pic as well but will get better pics later. The engine has yet to arrive
05-17-2014, 06:36 PM
#38
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Engine arrived yesterday. Tore it down today. When the pistons get here it will go back together. If anyone is looking for e55 upper oil pan, oil pump, alternator, starter etc let me know
11-22-2015, 03:16 AM
#39
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1988 300CE totaled due vandalizm 1998 E430 Sold, 2000 S430 Daily driver, 2003 S55 project
N/A Cylinder Heads vs SC heads
I am in the middle of issues with my 2003 S55. I had an internal coolant leak(between timing cover and block) then just before I was going to pull the engine to fix the leak I started up the car to move it and it stalled.
When I removed the engine I pulled the left valve cover and noticed all the intake rockers were loose.
So removing the cam sprocket to start the head removal process I found out the cam sprocket locating tab sheered off.
Pulled the head and found every intake valve bent. They hit the piston not hard but still a hit. The front cam bearing is rough on the head with the bent valves.
So here is my question
I have a pair on N/A heads and I read if I wanted to run them on my supercharged engine I would need to run the supercharged cams, valve springs and rockers is this true?
I do know the valves are the same part numbers but the cams are not.
This is my plan. When I bought the car I knew about the coolant leak and wanted to try and save the car. So not knowing what the issue was I bought a 2003/2004 SL 55 engine with the heads off. The engine claimed to only have 3000km on it. So the place I bought it form gave me the N/A heads but no cams or rocker arms.
So knowing my engine had coolant running through the block and not knowing how long I bought the above engine to build up then just do a swap as I wanted to keep the car mobile in case I had to move it.
So with the N/A heads not knowing if they would work I bought a SL55K engine that blew up for heads. Well my gamble did not pay off the left head was bad. It dropped a valve they kept it running so one cylinder is real rough.
So right now I have two nice N/A heads no cams, rockers, one really chewed up left head, one left head with a rough front cam bearing and two very usable 55K right heads. Then a SL 55K bottom end with low mileage, a S55K engine(that ran very nice till the day I went to move it) with 4 piston that were kissed and had coolant running through it.
The pictures in the album are labeled. For some reason I could not upload to the thread
https://mbworld.org/g/album/4593968
When I removed the engine I pulled the left valve cover and noticed all the intake rockers were loose.
So removing the cam sprocket to start the head removal process I found out the cam sprocket locating tab sheered off.
Pulled the head and found every intake valve bent. They hit the piston not hard but still a hit. The front cam bearing is rough on the head with the bent valves.
So here is my question
I have a pair on N/A heads and I read if I wanted to run them on my supercharged engine I would need to run the supercharged cams, valve springs and rockers is this true?
I do know the valves are the same part numbers but the cams are not.
This is my plan. When I bought the car I knew about the coolant leak and wanted to try and save the car. So not knowing what the issue was I bought a 2003/2004 SL 55 engine with the heads off. The engine claimed to only have 3000km on it. So the place I bought it form gave me the N/A heads but no cams or rocker arms.
So knowing my engine had coolant running through the block and not knowing how long I bought the above engine to build up then just do a swap as I wanted to keep the car mobile in case I had to move it.
So with the N/A heads not knowing if they would work I bought a SL55K engine that blew up for heads. Well my gamble did not pay off the left head was bad. It dropped a valve they kept it running so one cylinder is real rough.
So right now I have two nice N/A heads no cams, rockers, one really chewed up left head, one left head with a rough front cam bearing and two very usable 55K right heads. Then a SL 55K bottom end with low mileage, a S55K engine(that ran very nice till the day I went to move it) with 4 piston that were kissed and had coolant running through it.
The pictures in the album are labeled. For some reason I could not upload to the thread
https://mbworld.org/g/album/4593968
Last edited by SChalmers; 11-22-2015 at 03:34 AM. Reason: Pictures That I could not get to upload
11-22-2015, 10:22 AM
#40
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Dirt Scooters
The N/A heads will work fine and you don't have to change the springs or the rockers. The springs are fine for the boost we run and the rocker bridges are the same 1.49 ratio on both heads. I would go with 55k cams if possible. The N/A heads aren't as boost friendly.
11-22-2015, 11:51 AM
#41
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1988 300CE totaled due vandalizm 1998 E430 Sold, 2000 S430 Daily driver, 2003 S55 project
The N/A heads will work fine and you don't have to change the springs or the rockers. The springs are fine for the boost we run and the rocker bridges are the same 1.49 ratio on both heads. I would go with 55k cams if possible. The N/A heads aren't as boost friendly.
The reason I am asking is in the post earlier on it was mentioned that the N/A heads where the way to go as they flow better.
Just trying to figure out if I should go look for a pair of supercharged heads or run the N/A heads.
Is there any advantage to running the N/A heads?
I do not have the cams or rockers from the N/A heads, so if I use them the machine shop would have to make sure everything is with in spec. The cams and rockers would be matching.
Just trying to save an S55, like they say no such thing as a cheap Mercedes. Bought it for $5000 plus tax US with the coolant leak. I really do not want to run the original engine as I do not know how long it has has coolant running through the oil. The reason I bought the low mileage engine without heads. Which looks almost new. Pulled the oil pan and timing cover to check out the engine, everything is nice and tight.
Thanks a ton for getting back to me. Really liked the thread you started about this. You never did a final post on how it turned out or did I miss it?
Cheers
Scott
10-16-2017, 04:19 PM
#43
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2001 E320 Wagon, 2006 LBZ Silverado, 2007 E63 (sold), 2001 E55 (sold)
Photobucket ****ed over a lot of communities with their bull****.
10-16-2017, 06:16 PM
#44
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10-17-2017, 03:26 PM
#46
Super Member
07-05-2019, 11:56 AM
#47
if you don’t mind sharing with me some of your knowledge
i got e55 and i finished all the bolt on mods and still need more power.
i see that you dis a lot on your engines, porting , pistons and more may i ask you what is the most useful to be done ,
what parts to use ?
i tried to send you private but no luck
07-28-2020, 09:42 PM
#48
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I’m just having trouble understanding how the combustion chambers could be the same volume, based on photos in this thread..
07-29-2020, 01:57 PM
#49
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1999 C43 AMG, 2005 E55 Wagon
could be explained if you could measure the length of the rods and pistons, etc. There's several missing pieces of data you can't get from the pics
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ctravis595 (07-29-2020)
11-01-2020, 02:04 PM
#50
Newbie
M113/m113k piston sample draw
Hallo, I need a sample of a m113 AMG piston, or full dimensions to make custom order forged pistons. My engine isn't open yet to made myself the measurements. Thanks
