Vintage Grumble Posted May 27, 2011 Share Posted May 27, 2011 Hello, what would the std timing on one of these be? 8-10? I'm having trouble finding a clear answer on teh nets. Sounds like some have up to four marks on the pulley, mine only has one luckly. Regards, VG. Quote Link to comment Share on other sites More sharing options...
KKtrips Posted May 27, 2011 Share Posted May 27, 2011 8 degrees at idle with vacc adv off is safe. Run 95 octane too.. Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted May 27, 2011 Author Share Posted May 27, 2011 95?!?! do I look like a gold mine owner? Cheers for the info boss. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted May 28, 2011 Share Posted May 28, 2011 my 18r is 10 btc for stock setup, got it around 7 with a weber Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted May 28, 2011 Author Share Posted May 28, 2011 When I went to do this, I realised the pulley has got four marks on it (was feeling around in the dark and could only feel one notch) I know the first is TDC, but am sort of guessing the next 3 are 10 20 30 deg (seemed like you could fit 9 notches at that spacing on 1/4 / 90 deg of the pulley) so I timed it to the second notch, and it seems to run a bit better. Would be nice to know what each notch is tho, guess I need to buy a degree wheel. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted May 28, 2011 Share Posted May 28, 2011 ill go look in my r series manual and let you know Quote Link to comment Share on other sites More sharing options...
KKtrips Posted May 28, 2011 Share Posted May 28, 2011 Use maths broseph - use your mums sewing tape (in mm hopefully) wrap it around the pulley and measure the distance between the first and the last marks then measure the diameter of the pulley. Then get out your calculator.. diameter * pi = the circumference divide circumference by 360 = "X" Divide the distance between the first and last marks by "X" = the number of degrees between the first and last marks ("Y") divide the "Y" by 3 (cos the 4th mark is zero) and that will give you the graduations of the marks.. Next find which mark is TDC by using a screwdriver down the hole of number 1.. If you are not sure how to do that - report back and I'll chuck up a full description.... LOL Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted May 28, 2011 Share Posted May 28, 2011 my manual for 16r and 18r has only 2 marks, left to right, its tdc and timing, from memory my actual 18r had 3 marks, so now i'm just confused :/ Quote Link to comment Share on other sites More sharing options...
Spencer Posted May 28, 2011 Share Posted May 28, 2011 Yea was going to say just measure the diameter of the wheel and work that shit out. Then get a white paint pen and mark that shit for good, mark 10-20-30 degrees so you can see how much timing it runs all in As for running 95, being a 12R it probably has about 8:1 compression, I would only step up a grade if you could get a spring kit and fuck with how early your advance is coming in as I doubt its very aggressive. Quote Link to comment Share on other sites More sharing options...
Vintage Grumble Posted May 29, 2011 Author Share Posted May 29, 2011 I printed out a degree wheel and checked it, as me and math do NOT get along (even simple math such as this) and it is TDC-10-20-30 (I did the old screw driver down the plug hole to find TDC) Seems to be running pretty well. Cheers gents. Quote Link to comment Share on other sites More sharing options...
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