Ray70Chrg
Well-Known Member
recently I installed a Lunati 703 cam into 383. Instructions said to install at 106* centerline because cam was already advanced 4*. Did the degreeing of the cam 3x and always came up at 107*. Checked with Lunati and they said that was close enough, however, he would advance it 2*. Since this was my 1st venture into this kind of replacement I left it at 107* and buttoned it up. Did the proper break-in procedure and everything was fine. I find myself at this time with the chain cover off to fix an oil leak problem, my fault. I had also changed the timing chain and sprockets and the crankshaft sprocket is a 9 position item. Originally I set it up for 0 advance/retard. My question is: Do you think it would be safe to just advance the cam the 2* now. After reading the instructions I learned that the crank would have to be advanced to the 4* slot in order for the cam to be advanced 2*. Of course the cam sprocket timing mark would have to line up with the 4A tooth on the crank sprocket. Since the center line is now 107*, this would only change it to 105* center line. Do you think that this is safe to do? All these replacement parts are only about 100 miles old. I have read that slight " advance " adjustments can be beneficial to a cam in the low end rpms. Thanks in advance for your replies.