yakuza racer 16 Posted June 27, 2011 Report Share Posted June 27, 2011 ok please explain to me what happens when timing is moved 1 tooth forward (advanced) and 1 tooth rear ( retard)......im looking at touching and playing with my timing a little... i know 1 tooth advanced gives better low range and the car feels better, but what adverse effects can be made with doing so?the retarded timing is pulled esp for NOS applications.help me along here fellas Link to post Share on other sites
UnitedMotorsport 55 Posted June 27, 2011 Report Share Posted June 27, 2011 If Your talking about doing this on a VR6 - Your wasting your time, as the exhaust and the inlet are on the same cam. Link to post Share on other sites
FishWick 21 Posted June 27, 2011 Report Share Posted June 27, 2011 Yep. Was going to say why retard one bank of 3 and advance the other. Doesn't make any sense.As UM say, are you getting confused with the 24V's VVT ?That works because the fuel is adjusted accordingly. Moving the cam timing on the 12V just means the injection occurs at the wrong time. Link to post Share on other sites
yakuza racer 16 Posted June 28, 2011 Author Report Share Posted June 28, 2011 Yep. Was going to say why retard one bank of 3 and advance the other. Doesn't make any sense.As UM say' date=' are you getting confused with the 24V's VVT ?That works because the fuel is adjusted accordingly. Moving the cam timing on the 12V just means the injection occurs at the wrong time.[/quote']very interesting..... we moved my buddies cam timing advanced by one tooth and it seemed to have given the car better performance from 2000rpm and pulls strong till redline.....i will do some investigation a pre dyno run and after dyno run just to see if there is any truth in this. Link to post Share on other sites
rodney 17 Posted July 9, 2011 Report Share Posted July 9, 2011 You will get an effect. All about when the bang happens. Most timing adjustment is done by altering the spark point. Retard for fi so as not to overheating valves and head and induce premature ignition. Losses in performance gained back by fi. So in kind one tooth is a crude alteration in kind. But don't go far as it will make parts meet in chamber. Differs manufacturer to manufacturer tolerances. Link to post Share on other sites
FishWick 21 Posted July 11, 2011 Report Share Posted July 11, 2011 But running a tooth out on a non-VVT engine means the burn takes place when the exhaust valve is still open, so will burn it out prematurely. Link to post Share on other sites
yakuza racer 16 Posted July 13, 2011 Author Report Share Posted July 13, 2011 But running a tooth out on a non-VVT engine means the burn takes place when the exhaust valve is still open' date=' so will burn it out prematurely.[/quote']so i would have to assume, for safety, that this is not something someone has done or that is suggested? Link to post Share on other sites
FishWick 21 Posted July 13, 2011 Report Share Posted July 13, 2011 I wouldn't do it personally. 1 tooth out on the VR6 isn't end of the world stuff, but it's enough to cause problems further down the line. Link to post Share on other sites
Recommended Posts