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 Posted: Tue Aug 14, 2012 2:59 pm |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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Update: I (or better said my engine) has successfully manage to fu.ck up the supercharger in a spectacular manner.
Rear snout bearings are literally melted, front bearings are quite shakey. Epoxy off the rotors has chipped off and lubricating oil has a dark tint.
I suspect that bolting the s/c directly to the intake manifold and thus to the cylinder head is not such a good idea since some mysterious forces are bending the engine in the belt area. As a proof, I have found a bit of oil leakage in the opposite direction, which means that although I have used ARP studs for head mounting, some serious problems may be inside.
Obviously I need rework and that means quitting the air conditioning. That's fine since more space for dash gauges is thus created 
For the moment project is on hold.
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Posted: Thu Aug 16, 2012 1:43 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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how much boost are you running?
have you ever monitor the inlet air temperature?
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Posted: Thu Aug 16, 2012 2:23 pm |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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0.8 bar boost  At these values I should have had at least 70 HP and 100Nm more.
Roots s/c is famous for air heating. There is no thermal isolation between s/c and intake manifold (bad, bad. bad!) and engine + s/c temps got combined. On top of this, there is no intercooler. I think IAT is 90-100 celsius which is horrible. I will have a serious discussion with the tuning engineer on monday. Meanwhile I found another supercharger but I do not afford changing them as socks or underwear
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Posted: Thu Aug 16, 2012 2:58 pm |
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Joined: Feb 08, 2010
Posts: 10151
Trade Rating: +12
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this is properly a draft question but you sure you got enough oil in the supercharger? not too much or too less?
as far as i remember M62 rate at max 10psi at 14000rpm?
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Posted: Sun Aug 19, 2012 4:25 am |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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Seabook, good question. I have revised the oil and it seems to be okay. Now I've found a new kompressor and will intend to deploy intercooling
I am using a 2:1 pulley therefore I am not going over 14000 rpm. Pressure is being read using the MAP sensor and is about 0.78 bar (11.3 psi)... I don't know what to believe, however, I am a calm driver, shifting at about 5000 rpm...
The fault that I got was not in the front snout (the oiled one) but in the one in the back ...
It resulted in a s***ty mess, with s/c inner walls "machined" by the rotors.
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Posted: Sat Jan 12, 2013 4:50 pm |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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Gave up DP-Engineering decompression plate as it generated too much hassle. Lesson learned: IT IS NOT GOOD FOR LOW BOOST. May be good for high boost turbo (over 1.2 bar) but definitely not for low boost. As a matter of fact, engine idle becomes a nightmare, fuel consumption is chaotic, lots of unburnt fuel goes off the exhaust...
Stock compression engine with just 0.5 bar boost yields now over 8 HP over the decompressed one with 0.8 bar... will go 0.8 bar soon, targeting 240HP and 300Nm. Even now (215 HP and 255Nm) the car has violent takeoff but thank God for the stiff suspension and lowered height...
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Posted: Fri Aug 30, 2013 8:08 pm |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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any update?
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Posted: Sat Aug 31, 2013 12:13 am |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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Switching to new engine management soon. Car is running fine, mpg is low
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Posted: Sun Sep 01, 2013 10:09 am |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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| deadrange2001 wrote: |
| Switching to new engine management soon. Car is running fine, mpg is low |
mate can i get your pic of installation 
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Posted: Sun Sep 01, 2013 4:58 pm |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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Posted: Mon Sep 02, 2013 3:19 am |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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..for
think i need to contact you, im into supercharger project too but want to maintain aircond..not sure which place to mount it, did u think amr 300 and amr 500 too small.. not planning to change intake manifold
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Posted: Mon Sep 02, 2013 3:29 am |
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Joined: Apr 07, 2012
Posts: 24
Trade Rating: 0
Location: eu
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You can keep air conditioning but things are going to be really tight. You need a very good welder.
You will have to move all heat exchangers 2-3cm towards the driver side (assuming you have a left hand side steering car).
You cannot keep the original manifold since it occupies too much space.
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Posted: Mon Sep 02, 2013 12:00 pm |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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| deadrange2001 wrote: |
You can keep air conditioning but things are going to be really tight. You need a very good welder.
You will have to move all heat exchangers 2-3cm towards the driver side (assuming you have a left hand side steering car).
You cannot keep the original manifold since it occupies too much space. |
mine is right hand drive anyway... heat exchanger= radiator?
HOW about using charger AMR 300/ AMR 500 looking for nice torque anyway
by the way could i get much clearer pic of
- Custom 18.5cm crank pulley + custom belt
- supercharger mounting point
-your new intake manifold
-how supercharge and belting to crank pulley;s cannot thinking if there is enough space
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Last edited by heyziq on Mon Sep 02, 2013 12:27 pm; edited 1 time in total
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Posted: Mon Sep 02, 2013 12:24 pm |
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Joined: Feb 07, 2010
Posts: 620
Trade Rating: 0
Location: Malaysia
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BY the way let me help you post your picture here
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