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NA b230 performance upgrades

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Posts: 1
Joined: Sun Apr 16, 2017 5:01 am
Year and Model: B230 racecar
Location: Australia

NA b230 performance upgrades

Post by Volvospeedcar » Sun Apr 16, 2017 5:08 am

Hello from Australia
I have a speedcar (dirt racing) that runs a b230 engine on methanol i was just wondering what ignition upgrades and engine upgrades can be done to get more power. Has to stay NA and under 3.0 litre engine capacity. Thanks in advance.

Posts: 1
Joined: Sat Nov 05, 2016 3:14 am
Year and Model: 1991 940SE
Location: Boise
United States of America

Re: NA b230 performance upgrades

Post by jakemness » Tue Apr 18, 2017 8:04 am

There's a few options you have. You can put a 16 valve head (I'm assuming it's 8 valve) on their without too much trouble... but finding the head itself can be a little tough. If you want to stay with the 8 valve head, it's possible to find a 2.5L crankshaft (and matching pistons) and increase the displacement a little bit. There's some pretty aggressive cams you can slap in it as well. There's a lot of information and possibilities out there for these engines. I know this might not be the most helpful thing to do on this site, but you can find a LOT of information on the b230 engine over at

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Year and Model: 93:240/940
Location: Sunflower State
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Re: NA b230 performance upgrades

Post by 93Regina » Wed Apr 19, 2017 11:59 am

Volvospeedcar wrote:
Sun Apr 16, 2017 5:08 am
i was just wondering what...engine upgrades
1984-B23F engine fitted to automatic had higher compression ratio. But, I have no idea which engines were shipped to your country, and if carb'ed or EFI back then.

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