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Re: how hard would it be to turbo charge a 242? 200 1984

posted by  someone claiming to be Mika Soininen on  Sun Dec 16 08:52 CST 2001 [RELATED]

First, my english is not good,but i hope you can understant it.I have a 242 Volvo -79 with turbo,intercooler and fuelinjection (not by factory).My engine type is B230A, turbo garret t05 (on 12-litre volvo truck),intercooler is custom made,fuelinjection system is LH-Jetronic,(my aplication is more 'heavier' than stock).First you have to find what compression ration you have your engine?,Second how powerful engine you want? The power determs what must be done to the engine.In Finland we have 2-types of factory turbo volvos (200-series).Engine type: B19ET and B21ET,tecnical: comp.ratio both engines are 7,5 horsepower/toruque B19ET 145hp/5500rmin,226Nm/3750,fuel octane 98. B21ET 155hp/5500rmin,240Nm/3750,fuel octane 98.Factory components are usally theese:Cylinder head 530 (3-last numbers on head,theese have Natrium exhaust valves),turbo garret to3,fuelinjector LH-Jetronic and boost pressure is about 0,4Bar.If you have high compression on the engine,i recomend lower it.Turbo engines have difrent pistons than normal engines and piston rings are diffrent,same connectionrods,crankshaft,clutch is much 'stiffer' than orginal carburator model.You can use your camshaft if it is orginal (works fine, if not used on race purposes).If you use 'race' camshaft, turbocharger usally must be bigger than orginal (garret t04).If the engine is worn,do not turbocharge it,it works very short period until it brakes down.(i have experienced it)

What to do? You can use normal pistons with turbo pistonrings (dont use over 0,8bar boost,recomend 0,4bar),lower the compression,use new bearings,use garret t03 charger,stock camshaft,turbo exhaust system and LH-Jetronic with fuelpressure regulator that is used on turbo engines (engine needs lot of fuel on boost).If you want more 'insurances' on engine,balance connectionrods,pistons and crankshaft.I can sed you list and (picture) what i have done to my engine.please send your e-mail adress and questions,if i can help you on theese projects.





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