Hi folks
Some time since my last post. Many things happened.... a lot of good, a few bads ones but after all we got that old lady back to life. This was (well... still is) my biggest, time consuming, money consuming, weekend consuming etc....hope last project , at least this big because if I even consider to do this kind of think again I risk to loose my wife....
After years (literally) of project and all my pockets totally empty ,finally we were able to get the car running .
The body work job was posted , http://www.benzworld.org/forums/r-c107-sl-slc-class/1686593-brazilian-450slc-restoration.html , many months ago....
After wondering a lot if my decision to change the upper engine from stock 450 to euro 350 was good or bad , I decided to booked some time in a local dynamometer to check if my idea was correct or not.
From the very beginning I was looking for efficiency, better kilometer per liter (or mileage /gallon thinking american) and if possible more power from that old M117. After some research I decided to go this way.
Lower engine -Original euro M117
Upper engine- Heads, cams, intake etc... - Euro M116 , 350sl
ECU- Injepro ( Brazilian Brand )
Injectors -Bosch 0280150943- 19 lbs
Fuel pump -Universal , pressure 40 psi - Fuel rail custom made.
Changed the clutch fan to electrical cooling fan.
Brazilian premium fuel -80%gasoline - 20% ethanol. By federal law , 100% gasoline are allowed to airplanes and races only.
I tried to improve the original MB setup without loosing that vintage "soul". Wheels were also changed only because of aesthetics. I think those Old chrome AMG aero staggered wheels are just beautiful. Suspension is also brand new 1.5 inch lowered.
I am sorry but my poor english does not allow me to explain why I decided to change the upper engine. In few words I can say , better torque in low revs because M117 450 bigger displacement and better high revs because of M116 350 upper engine .
Engine was totally rebuild and balanced . New first repair size pistons (very hard to find) ,rings kit , chains and tensioners , oil and water pumps and all small related parts. All new. Cylinder heads were ported , flow tested , equalized and polished. Got the MB 107 chassis service books and the engine was rebuild strictly under factory specs, bolt by bolt . Basically a brand new engine . Same to tranny, all brand new parts.
I saw many posts talking about aftermarket fuel injection systems in old engines , from totally diy projects like megasquirt to very expensive state-of-the-art ones like motec kits, but can not remind me a dynamometer documentation to show the final results, at least none in MB old engines . So I decided to book that test .
After 2 hours playing with setups , guys at shop decided to "go for it"
And I liked a lot what I saw.
34% more power compared to low comp US 225hp engines
26% more power compared to high comp Euro 240hp engines
Final test showed 302 hp. Engine speed limited to 4.800 RPM because it is a brand new engine, with less than 3 total hours after rebuild . I guess we will have additional 5-10 hp when the engine reach safely 5.500 -5.750
So.... What you guys think about that numbers? Fuel consumption is ??? Because we never drive the car at streets. I intend to start to collect mileage numbers from this weekend.
Will let you know when I start to "hit the road".
just let me know folks....
Well, our first setup was the INJEPRO factory setup. Good cruise curve 0.95 AF ratio.
http://youtu.be/Mi_iPhxEq94
But very lean under load after around 3.500 RPM. Adjustments started to take place
http://youtu.be/hX1IiRXzSik
No good at all... worst than before
450SLC INJEPRO setup - YouTube
Here a little better but still lean above 4.500 rpm and something they called a "hole" around 3.000 rpm
450SLC INJEPRO dyno - YouTube
After around 1.5 hours pressing buttons and reading curves guys decided to real test the car. Very nice final power. 262HP. a lot better than stock factory numbers.
http://youtu.be/ogJuUkmBrEo
The second run was even better showing 272HP after some adjustments.
http://youtu.be/2gGmOUkG5-w
At this point, guys decided to enable lambda sensor . Let the ECU make the final adjustments by lambda in real time. All adjustments til now were manual config. Lets roll...
http://youtu.be/NrtTwCDS_aE
Wow!!! Is this dyno numbers correct??? almos 300HP ...NICE!!!
Finally after all corrections , lambda sensor enable to final AF ratio we got 302HP@4607 RPM and 46.09 KMG@4379 what I believe to be correct numbers
http://youtu.be/u2VYP1vYJyw
Now let the experts say something. Critics are always welcome because I am always learning or at least trying to learn.
tks guys..
Some time since my last post. Many things happened.... a lot of good, a few bads ones but after all we got that old lady back to life. This was (well... still is) my biggest, time consuming, money consuming, weekend consuming etc....hope last project , at least this big because if I even consider to do this kind of think again I risk to loose my wife....
After years (literally) of project and all my pockets totally empty ,finally we were able to get the car running .
The body work job was posted , http://www.benzworld.org/forums/r-c107-sl-slc-class/1686593-brazilian-450slc-restoration.html , many months ago....
After wondering a lot if my decision to change the upper engine from stock 450 to euro 350 was good or bad , I decided to booked some time in a local dynamometer to check if my idea was correct or not.
From the very beginning I was looking for efficiency, better kilometer per liter (or mileage /gallon thinking american) and if possible more power from that old M117. After some research I decided to go this way.
Lower engine -Original euro M117
Upper engine- Heads, cams, intake etc... - Euro M116 , 350sl
ECU- Injepro ( Brazilian Brand )
Injectors -Bosch 0280150943- 19 lbs
Fuel pump -Universal , pressure 40 psi - Fuel rail custom made.
Changed the clutch fan to electrical cooling fan.
Brazilian premium fuel -80%gasoline - 20% ethanol. By federal law , 100% gasoline are allowed to airplanes and races only.
I tried to improve the original MB setup without loosing that vintage "soul". Wheels were also changed only because of aesthetics. I think those Old chrome AMG aero staggered wheels are just beautiful. Suspension is also brand new 1.5 inch lowered.
I am sorry but my poor english does not allow me to explain why I decided to change the upper engine. In few words I can say , better torque in low revs because M117 450 bigger displacement and better high revs because of M116 350 upper engine .
Engine was totally rebuild and balanced . New first repair size pistons (very hard to find) ,rings kit , chains and tensioners , oil and water pumps and all small related parts. All new. Cylinder heads were ported , flow tested , equalized and polished. Got the MB 107 chassis service books and the engine was rebuild strictly under factory specs, bolt by bolt . Basically a brand new engine . Same to tranny, all brand new parts.
I saw many posts talking about aftermarket fuel injection systems in old engines , from totally diy projects like megasquirt to very expensive state-of-the-art ones like motec kits, but can not remind me a dynamometer documentation to show the final results, at least none in MB old engines . So I decided to book that test .
After 2 hours playing with setups , guys at shop decided to "go for it"
And I liked a lot what I saw.
34% more power compared to low comp US 225hp engines
26% more power compared to high comp Euro 240hp engines
Final test showed 302 hp. Engine speed limited to 4.800 RPM because it is a brand new engine, with less than 3 total hours after rebuild . I guess we will have additional 5-10 hp when the engine reach safely 5.500 -5.750
So.... What you guys think about that numbers? Fuel consumption is ??? Because we never drive the car at streets. I intend to start to collect mileage numbers from this weekend.
Will let you know when I start to "hit the road".
just let me know folks....
Well, our first setup was the INJEPRO factory setup. Good cruise curve 0.95 AF ratio.
http://youtu.be/Mi_iPhxEq94
But very lean under load after around 3.500 RPM. Adjustments started to take place
http://youtu.be/hX1IiRXzSik
No good at all... worst than before
450SLC INJEPRO setup - YouTube
Here a little better but still lean above 4.500 rpm and something they called a "hole" around 3.000 rpm
450SLC INJEPRO dyno - YouTube
After around 1.5 hours pressing buttons and reading curves guys decided to real test the car. Very nice final power. 262HP. a lot better than stock factory numbers.
http://youtu.be/ogJuUkmBrEo
The second run was even better showing 272HP after some adjustments.
http://youtu.be/2gGmOUkG5-w
At this point, guys decided to enable lambda sensor . Let the ECU make the final adjustments by lambda in real time. All adjustments til now were manual config. Lets roll...
http://youtu.be/NrtTwCDS_aE
Wow!!! Is this dyno numbers correct??? almos 300HP ...NICE!!!
Finally after all corrections , lambda sensor enable to final AF ratio we got 302HP@4607 RPM and 46.09 KMG@4379 what I believe to be correct numbers
http://youtu.be/u2VYP1vYJyw
Now let the experts say something. Critics are always welcome because I am always learning or at least trying to learn.
tks guys..