Has anyone ever put a performance chip in there BMW? I own a 1984 BMW 325e with a automatic transmission. Did it improve performance and is there a manufacture of these chips? My car is completely original. Thank you.
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As you car is 1984, the automatic transmission is the ZF 3HP22.
You can easily upgrade it to the ZF 4HP22 as some owners want to get rid of automatic transmissions after swaps.
Your differential ratio should be 2.79. It's the worst differential for performance, but the best for mileage.
If you look around, you'll be able to find a 3.07 Torsen differential. It was installed in the 2000-2002 BMW Z3 3.0i Roadster.
Many people don't like Torsens, so junk yards sell them for as low as $350.
Also, there was a 3.15 Z3 differential.
Very likely, a performance chip will require Premium gas.Last edited by Vincenze; 10-04-2020, 10:25 PM.
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Originally posted by Vincenze View PostAs you car is 1984, the automatic transmission is the ZF 3HP22.
You can easily upgrade it to the ZF 4HP22 as some owners want to get rid of automatic transmissions after swaps.1986 325e Schwarz (sold)
1989 325iX Alpineweiß​ (daily)
Greed is Good
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Yes, swap to the 027 if you can. You may even be able to get one with a performance chip already inside."I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj
85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
88 M3 - LACHSSILBER/SCHWARZE
89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER
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Originally posted by Vincenze View PostYou can unsolder the chip using a solder sucker.
https://www.amazon.com/WEmake-WM-SP4...ce-g2545694624
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