Smarty Jr. timing rattle

[AH64ID]

If it sounds like a gas engine "ping" and is only at low load and low rpms then your fine.

 

[jrgough]

Is timimg 4 to much for all of the time when running switch 1? I want to find a spot and leave it alone. I try to change my oil every 4,000 to 5,000 miles is this to long for the soot to build up for timimg 4?

 

[cerberusiam]

You can't really leave it alone unless you do just one type of driving. Advance the timing when your running empty and looking for mileage. Towing you better back it down someor you run into heat soak in the cylinder and thats hard on pistons, the 600 series engines is worse.



Advanced timing actually will help with the soot in the oil because you get more complete combustion. Keeping the rpm's under 2500 will help also.



The rattle is just more pop in the combustion becuas eof the longer burn time. It doesn't hurt the injectors or anything else if used wisely.

 

[AH64ID]

Advanced timing actually will help with the soot in the oil because you get more complete combustion. Keeping the rpm's under 2500 will help also.

My UOA's disagree with that. Whenever I run TM4 my soot goes thru the roof, even if the 7500 UOA interval is 90% highway.

 

[rscurtis]

Advancing the timing is good to a point, until it is so advanced that the fuel is burning outside the combustion chamber in the piston. I suspect this is what happened to my '95 at 21 degrees, that's why it smoked and the oil turned black on an otherwise clean running engine. Resetting the timing to 15 degrees cured the smoke, smell, and the black oil, and restored the mid range torque.

 

[cerberusiam]

My UOA's disagree with that. Whenever I run TM4 my soot goes thru the roof, even if the 7500 UOA interval is 90% highway.

Same power settings? Thats a bit strange that with more complete combustion there is more soot which is usually from incomplete combustion. Makes one wonder what else gets adjusted when the timing does.

 

[TCDiesel]

Consider aftermarket Tips with Higher Pressure,this will effect timing. Add Higher temps and the flash point is Much faster,How much compression does it take to make 210+*? add fuel early and its gonna be suck up wallet time. add fuel late is safe but not efficient.

 

[AH64ID]

Yep same power settings. It doesn't seem to make a difference on the oil as much as timing. TM4 is crazy hard on oil for me, so I run TM2.

My last time running TM4 was for a trip to and from Arizona, and mostly highway miles down there. I did get about . 75 mpg better, but the oil went from 2. 6% to 3. 9% in less than 7K miles. Those miles were at an average of 17. 15 mpgs and 60 mph, with zero towing. Very easy miles should have polished the oil with a bypass, not plugged it full of oil. TM4 was also only used for 2/3 of the miles, glad I didn't use it for all of them. I have had similar results with UOA and soot before the Jr got revo or B4 timing.