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Sept 14, 2016 16:15:21 GMT
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We have an old 95 1.8 diesel fiesta non turbo as a shop car. Its currently getting a big audio system installed in it and we have already done big brakes, suspension, wheels and what have you, but it couldn't pull the skin off custard and will be even worse once the weight of the system comes into play. We had toyed with doing a swap for a later turbo'd diesel lump, but I have just found a supercharger on the shelf and got to thinking, its here and its free...
Now I know that essentially a turbo is more efficient due in the most part that a sc pulls power for the engine to drive it, but we're not after building a monster, just need a bit more pep.
Thoughts.....?
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Its not broken, its resting!
Max signature image height: 80px
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Sept 14, 2016 18:09:25 GMT
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How would you get the extra fuel that the boost required - use the turbo injection pump ?
Probably the best thing would be sell the supercharger and use the proceeds to buy a turbo 1.8 engine. Lot less hassle.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Supercharging a dieselslater
@slater
Club Retro Rides Member 78
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Sept 15, 2016 0:03:30 GMT
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Dunno what pumps they run but it may well be possible to get the right fueling with the original one.. The boost is always going to fairly predicable on a supercharger so you might get away with using a pump without boost compensation.
Boosting diesels is much more forgiving than a petrol.
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Sept 15, 2016 10:25:09 GMT
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Factory turbo transits don't use an LDA so you could probably get away with increasing the fuelling via the screws on the pump till you get a happy medium
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Sept 16, 2016 9:03:04 GMT
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Was intending to crank the pump up to aid fueling.
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Its not broken, its resting!
Max signature image height: 80px
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Sept 16, 2016 11:25:59 GMT
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I suppose the stock pump with no boost compensation is more likely to work fairly well with a supercharger what with the boost pressure being fairly linear with RPM
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Sept 19, 2016 19:59:41 GMT
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This is interesting.......would you need to lower the compression ratio? It sounds too easy?!
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bortaf
Posted a lot
Posts: 4,549
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Sept 19, 2016 21:07:01 GMT
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Depends how much boost you run? the ford 1.  and TD have the same comp ratio  |
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R.I.P photobucket
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Sept 20, 2016 6:27:10 GMT
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Should be really easy on an older diesel, you can't run into a lean burn scenario due to the base design so it's just a matter of more air in there and chuck more fuel in by upping the line pressure. You eventually reach saturation when the soot gets really bad and then need to back it off a bit as much too rich is damaging in a diesel causing excessive heat rather than lean. This all assumes that the physical engine can cope with the extra strain on the pump, pistons, rods, rings, block and crank.
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Last Edit: Sept 20, 2016 6:27:36 GMT by miker33
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Sept 20, 2016 11:30:14 GMT
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you cant lower the compression ratio, that defies the diesel cycle itself ! in factory forced induction diesel engine, they just have to be strong enough to widthstand the extra cylinder pressures
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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Supercharging a dieselslater
@slater
Club Retro Rides Member 78
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Sept 20, 2016 15:45:33 GMT
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Not strictly true but I wouldn't worry about lowering CR myself.
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hario
Part of things
S202 C300STD
Posts: 421 
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Sept 20, 2016 18:01:24 GMT
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Fit the injection pump from the turbo version of the engine?
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*S202 C300TD Wagon*
Installed:
OM606 & 722.6, Evo6 IC, S600AMG callipers & 345mm rotors. No catz. Leatherish seats.. Rust..
Future:
DIY manifolds & turbo compound build.
Built IP, & some kind of software. Less rust..
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and TD have the same comp ratio 
