Rrc19933 Posted February 21, 2019 Share Posted February 21, 2019 Hello i just saw that the engine on an 1993 rrc that the engine is 36D with different ratio than the previous one. I just don’t know the dynamic timing degrees to set it to. Does any one have an idea on how many degrees should it be. The engine is a 3.9. Any test that I should do to know the optimum degrees? Thank you Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 21, 2019 Share Posted February 21, 2019 How are you running the engine? First steps would be to confirm the pointer is in the right place, they often aren't. Quote Link to comment Share on other sites More sharing options...
Rrc19933 Posted February 22, 2019 Author Share Posted February 22, 2019 Pointer is the rotor arm? I have used a strobe to see the degrees and it was far away before TDC. I want to adjust it to the correct degrees depending on the engine that i have 36D. It was running perfectly but i have removed the distributor without marking it. I know it was wrong but let us consider that I’ve checked it and had to adjust it. I’ve searched and found many answers some say 4 degrees BTDC others 6-8. When i change the degrees the idle rom changes and i read that it should be between 500-550rpm. Mine is around 650-700. I can also change the rpm from the air intake. so I’m pretty lost. Just want to do it right for maximum power and best fuel consumption. Also I suspect that the reference plate of the TDC is tilted a litte to the left side. Thank you Quote Link to comment Share on other sites More sharing options...
walace58 Posted February 22, 2019 Share Posted February 22, 2019 Not sure how you do it on a v8, but why not check TDC and put the plate right/ confirm first? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 22, 2019 Share Posted February 22, 2019 As above, make sure the pointer is in the right place first,or you are shooting in the dark. Easiest way to do this is with a piston stop, it has been covered on here, do a search. Then, most V8s will tolerate 9 deg btdc on modern fuel. 1 Quote Link to comment Share on other sites More sharing options...
Rrc19933 Posted February 22, 2019 Author Share Posted February 22, 2019 Thank you walace58 i will do that. Bowie69 the tolerance is up to 9 degrees but what do you recommend as ideal? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 22, 2019 Share Posted February 22, 2019 9. Quote Link to comment Share on other sites More sharing options...
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