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    Max valve and seat sizes 531/530 head and ideal combustion chamber shape?

    Tried the search but couldn't find what I was looking for. I saw some pics of 48/40 valves and that's quite close combat already, so guessing that is abt max valve size. Maybe 50 intake would fit as well? Please discuss :) Then, I have quite some tools and was thinking to do some playing...
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    DCO/DCOE Carburetor and choke / venturi sizing on large displacement engines

    Starting a new thread because I am experiencing difficulties finding anything useful about the subject. As you might probably know I am busy with a 3 liter stroker redblock. I went down the Weber road coz I had some 48's wondering around in my barn. I build the engine and tossed them 48 dcoe's...
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    B20 stroked to B25

    Just bought this beauty yesterday! She is a stroked and bored B20. Eventually ending up being a B25 inside a B20. Spiffy little engine. I bought it because I liked the roller rockers, any thoughts on where they come from? When I opened it up I found some nasty stuff, some shit in the oil...
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    3.0litre stroker crank set, k-jet fueled?

    Morning gents, Found the 3L stroker crank set in the NL. Was thinking to use it in my pistonslappy B230E, so it is using K-jet. Using LPG as main fueling, looking into getting larger size venturi mixer but that shouldnt be to difficult. But actual question will be will my K-jet dig this shit...
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    LD performance wideband LSU ADV

    Any of you guys using LD performance wideband controller? I really like the LSU ADV it can handle a lot more stress than the 4.9. So I'm looking to buy the controller + sensor, but I'm not familiair with the products of LD performance UK. Maybe one of you guys have some experience...
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    LSD diff for reasonable price

    https://racingdiffs.com/products/volvo?_pos=1&_sid=9d6b3d83d&_ss=r&fbclid=IwAR2JwyoFKdAlNAYSy0g5xyGqDkjY2q-3mvPSBa7oHeSFKOOrjACENuV9_Z8 Any one of you using such thing? For dutch fb group we are currently doing groupbuy for this. Looks and seems quite promosing!
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    To Speeduino B21ET or bad idea?

    Looking at speeduino ecu's it's so cheap comparing to others. Anyone who has experience on speeduino?
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    Which connecting rod for B21ET 1981

    I was looking for rods to rebuild my B21ET. But I've found two types, they are all 145mm long and big and 58mm small end 24mm. But big end and small end width seems to have two options. Either; - big end width 29.75mm, small end width 24.8mm - or big end width 29.73, small end width 29.73. I...
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