Biturbo Engines and Turbochargers

E

Enz0

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This should be quite accurate.
ModelEngine Displacement
(L)		Number of ValvesEngine TypeTurbo TypeIHI Type
Carbureted Biturbos2.018AM 452VM1 + VM2RHB51-34001P12NRBRL338CZ
Carbureted Biturbos2.518AM 453VM1 + VM2RHB51-34001P12NRBRL338CZ
Carbureted Biturbo 2s2.018AM 452VM3L + VM4R / VM5L + VM6RRHB51W-34001P12NRBRL338CZ
Carbureted Biturbo 2s2.518AM 453VM3L + VM4R / VM5L + VM6RRHB51W-34001P12NRBRL338CZ
EFI Biturbos2.018AM 470VM7R + VM8L / VM16R + VM17LRHB51W-34001P9NRBRS311AZ
EFI Biturbo Ss2.018AM 471VM7R + VM8L / VM16R + VM17LRHB51W-34001P9NRBRS311AZ
EFI Biturbos2.518AM 472VM7R + VM8L / VM16R + VM17LRHB51W-34001P9NRBRS311AZ
EFI Biturbos2.818AM 473VM5R + VM6L / VM14R + VM15LRHB52GW-52002GP12NRBRL348CZ
4v Biturbos2.024AM 475VM10R + VM11L / VM18R + VM19LRHB51W-34001P9NRBRL338CZ
4v Biturbos2.824AM 477VM12R + VM13L / VM20R + VM21LRHB52GW-52002GP12NRBRL3911EZ
Shamal3.232AM 479VM22R + VM23LRHB52GW-52002GP12NR5BRL4016EZ
Racing2.024AM 490VM24R + VM25LRHB52GW-52002GP12NRBRL348CZ
Ghibli 22.024AM 496VM28R + VM29LRHB52GW-52002GP12NRBRL3911CEZ
Barchetta2.024AM 501VM26R + VM27LRHB52GW-52002GP12NRBRL3911CEZ
Quattroporte 42.024AM 573VM32R + VM33LRHB52GW-52002GP12NRBRL348CZ
Ghibli 2 / Quattroporte 42.824AM 574VM30R + VM31LRHB52GW-52002GP12NRBRL3911CEZ
Ghibli 2 Cup2.024AM 577VM26RB + VM27LBRHB52GW-52002GP12NR5BRL3711CEZ
Quattroporte 43.232AM 578VM36R + VM37LRHF5B-52002GP12NR5BRL4016EZ
3200 GT3.232AM 585VM38R + VM39LRHF5B-70004GP12NR5BRL4016EZ
VM9 (RHB52GW-100003GP20NRBRLL4219EZ) is for Chrysler TC by Maserati.

- 2.0 L
AM 452: RHB51-34001P12NRBRL338CZ (A/R ratio 12, 33 mm Compressor Inlet)
AM 452: RHB51W-34001P12NRBRL338CZ (Walter Cooled)
AM 470 / AM 471: RHB51W-34001P9NRBRS311AZ (A/R ratio reduced to 9, Compressor Inlet shrinked to 31 mm)
AM 475: RHB51W-34001P9NRBRL338CZ (Compressor Inlet enlarged to 33 mm)
AM 490: RHB52GW-52002GP12NRBRL348CZ (Turbine enlarged? A/R ratio increased to 12, Compressor Inlet enlarged to 34 mm)
AM 496 / AM 501: RHB52GW-52002GP12NRBRL3911CEZ (Compressor Inlet enlarged to 39 mm)
AM 573: RHB52GW-52002GP12NRBRL348CZ (Compressor Inlet shrinked to 34 mm)
AM 577: RHB52GW-52002GP12NR5BRL3711CEZ (Compressor Inlet enlarged to 37 mm)

- 2.5 L (Same turbochargers as 2.0 L of the same period)
AM 453: RHB51-34001P12NRBRL338CZ (A/R ratio 12, 33 mm Compressor Inlet)
AM 453: RHB51W-34001P12NRBRL338CZ (Walter Cooled)
AM 472: RHB51W-34001P9NRBRS311AZ (A/R ratio reduced to 9, Compressor Inlet shrinked to 31 mm)

- 2.8 L
AM 473: RHB52GW-52002GP12NRBRL348CZ (A/R ratio 12, 34 mm Compressor Inlet)
AM 477: RHB52GW-52002GP12NRBRL3911EZ (Compressor Inlet enlarged to 39 mm)
AM 574: RHB52GW-52002GP12NRBRL3911CEZ (New Compressor?)

- 3.2 L
AM 479: RHB52GW-52002GP12NR5BRL4016EZ (A/R ratio 12, 40 mm Compressor Inlet)
AM 578: RHF5B-52002GP12NR5BRL4016EZ (Updated with RHF turbo)
AM 585: RHF5B-70004GP12NR5BRL4016EZ (Turbine enlarged?)

References

Maserati Tipos – Yaroslav Bozhdynsky's Personal Website

www.bozhdynsky.com www.bozhdynsky.com
turbocentras.com

Turbochargers Catalog

Turbochargers and spare parts catalog
turbocentras.com turbocentras.com
 
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In the Porsche fraternity, there are good mentions for AE Turbos who do a full repair and reconditioning service.

Based in Normanton, West Yorkshire.

AET Turbos | Turbocharger specialists since 1974

Since 1974 AET has been at the forefront of turbo engineering. AET, based in West Yorkshire, England, specialise in new and remanufactured turbochargers, turbo reconditioning, and turbo re-engineering for a wide array of applications — from commercial and passenger vehicles to agriculture...
aet-turbos.co.uk aet-turbos.co.uk

I've never used them. There are mixed reviews. But Porsche Turbo guys speak well of this outfit.
 
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