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Olen tegemas rebuildi enda ralliautole t\u00e4nu millele sai alguse ka Fatech dashi arendus natuke \u00fcle kahe aasta tagasi. Kuna selle ajaga kogemusi ja teadmisi on kogunenud ka antud mootori kohta \u00fcsna palju siis jagan teiega seda protsessi ning ehk on sellest ka kellelgi tulevikus kasu. <\/span><\/p>\n<\/p>\n Mootor<\/strong><\/p>\n N52B30 \u2013 Viimane vabalthingav mootor BMW poolt. Selle mootori m\u00e4rks\u00f5nad oleksid minu arvates \u2013 Kaal ja Valvetronic. Kuigi seda viimast paljud pelgavad siis usun, et see on v\u00e4ga hea alternatiiv ITBdele. Eriti kui mootor on kergete nukkadega ja N54 sisselaskega siis gaasipedaali reaktsioon on v\u00e4ga terav. Enamikel v\u00f5idus\u00f5iduks ehitatud N52 mootoritel eemaldatakse valvetronic, et paigaldada aftermarket juhtaju. T\u00e4naseks olen ise aga originaal aju arendusega j\u00f5udnud nii kaugele, et ei ole vaja \u00fchtegi lisamoodulit originaal autost ning samuti saan eemaldada t\u00fc\u00fctu softlimiteri. Softlimiter piirab valvetronicu t\u00f6\u00f6d alates 6850 p\u00f6\u00f6rdest. Seega mina enda puhul ei n\u00e4e vajadust aftermarket aju jaoks ning saan kasutada \u00e4ra valvetronicu s\u00fcsteemi. Juhtaju teemal aga juba hiljem.<\/span><\/p>\n<\/p>\n Kerged nukad<\/strong><\/p>\n Oma eelmise mootori rebuildi aeg avastasin, et sisselaske ja v\u00e4ljalaske nukk olid antud mootoril m\u00e4rgatavalt kergemad. Selle kohta k\u00fcll palju infot internetis ei liigu, kuid nii palju kui olen suutnud selgeks teha siis aastast 2007-08 hakati nukkasi tootma sellele mootorile teisel meetodil ning tulemuseks on see, et m\u00f5lemad nukad saadi umbes 600-700g kergemaks. Kergeid nukkasi leiab ka N51 mootorilt mis sobivad 1:1le.<\/span><\/p>\n Kergete nukkade koodid on:<\/span><\/p>\n Sisselase – 7560932<\/strong><\/span><\/p>\n V\u00e4ljalase \u2013 7560934<\/strong><\/span><\/p>\n ” global_colors_info=”{}”]<\/p>\n <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n I’m doing a rebuild on my rally car, which also sparked the development of the Fatech dash a little over two years ago. Since then, I’ve gained some experience and knowledge about this engine, so I’ll share this process with you, and hopefully, someone will benefit from it in the future.<\/p>\n Engine <\/strong><\/p>\n N52B30 – BMW’s last naturally aspirated engine. In my opinion, the keywords for this engine are Weight and Valvetronic. Although many are wary of the latter, I believe it’s a very good alternative to ITBs. Especially if the engine has lightweight cams and N54 intake, the throttle response is very sharp. Many N52 engines built for racing remove the Valvetronic to install an aftermarket ECU. By now, with the original ECU development, I’ve reached a point where I don’t need any additional modules from the original car, and I can also remove the original soft limiter. The soft limiter limits the Valvetronic’s work starting at 6850 rpm. So in my case, I don’t see the need for an aftermarket ECU and can use the Valvetronic system. More on the ECU topic later.<\/p>\n Lightweight Cams<\/strong><\/p>\n During the rebuild of my second engine, I discovered that the intake and exhaust cams on this engine were significantly lighter. There isn’t much information about this online, but from what I’ve been able to find out, starting from 2007-08, the cams for this engine were produced using a different method, resulting in both cams being about 600-700g lighter. Lightweight cams can also be found on the N51 engine, which are a 1:1 fit.<\/p>\n The codes for the lightweight cams are:<\/p>\n Intake – 7560932<\/strong><\/p>\n Exhaust – 7560934<\/strong><\/p>\n <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n