Laxpower Posted July 26, 2005 Share Posted July 26, 2005 Does anyone know if any companies did tuning parts, or ‘how to tune’ info for 12R engines in the seventies? If they did, has anyone got any parts or info? I know there were some custom 12R powered Hilux pickups around at the time, but how much was done to the engines, I don’t know. I build tuned engines for rich folks who want to race mega buck old cars, and want to see if I can apply my know-how to my RH11 Hiace bus engine. What I need most is a fast road or race cam, in any condition as long as some of the lobes are intact, or even a data chart listing lift, duration, overlap, disposition, ramp velocity, etc., so I can have one made. I’m sure some improvements must have been made at some time, over the original ¼” lift cam. I know the project will be limited by the 12R three bearing crank design, which tends to get whippy at high RPM – I’ve had similar cranks break in old Ford engines – but I’m not after an all-out racer (yet). Just something that pulls better up hills, and cruises at speed on the motorway. I’ve searched the net, with no luck. If anyone can help with anything at all, I’ll be your friend for life. Bad Bob Quote Link to comment Share on other sites More sharing options...
fidgits Posted July 27, 2005 Share Posted July 27, 2005 oooh, very tricky.. I had a friend with a '76 Celica, but he fettled that by hand, and used performance carbs etc... i think you will find it very difficult unless you can find a specialist. Quote Link to comment Share on other sites More sharing options...
Laxpower Posted August 1, 2005 Author Share Posted August 1, 2005 OK. I'll get the grinder out! Quote Link to comment Share on other sites More sharing options...
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