Heavy Towing and timing
#1
Heavy Towing and timing
I am going to be towing a 14k fifth wheel up some pretty long 8-9% grades. I need some advice about using the Smarty with or without timing. No timing = higher EGTs....added Timing = lower EGTs but higher piston temps.
Thoughts?
Thoughts?
#2
I keep checking this thread hoping somebody knowledgeable will chime in. I knew more timing=lower egt's, but I didn't realize it raised piston temps. Am I wrong in thinking that higher piston temps=higher cylinder pressures which has resulted(for some) in lost valve seats? I run Smarty on 5 right now and I also have Roktech crank sensor and the timing rattle is very conspicuous.
#4
Registered User
Advancing the timing will increase cylinder peak pressure, but how much is the question.
I would be concerned more with the EGTs than anything else. So what level are you planning to tow with?
Lowboy,
I had the same loud timing rattle when I updated the SMARTY from 307 to the 309 software with the Rokktech. I ended up removing the Rokktech which helped. I do like version 309 since it dropped my EGTs by 200 degrees on WOT runs.
MikeyB
I would be concerned more with the EGTs than anything else. So what level are you planning to tow with?
Lowboy,
I had the same loud timing rattle when I updated the SMARTY from 307 to the 309 software with the Rokktech. I ended up removing the Rokktech which helped. I do like version 309 since it dropped my EGTs by 200 degrees on WOT runs.
MikeyB
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#10
I am thinking of setting it back to stock for towing. At least that way I can watch the EGTs and back off if I need. If I was to use timing I would have no idea if I was cooking the pistons and valves, Geez I wish I had a gauge for that!
#11
Registered User
I agree with jgiachino, drop it down to level 1 when towing that much weight.
Remember something about the timing, our trucks came from the factory with retarded timing because of NOx emissions. So our timing is less than the 12v and older 24v engines. With the CR engines there is plenty of room to play with.
MikeyB
Remember something about the timing, our trucks came from the factory with retarded timing because of NOx emissions. So our timing is less than the 12v and older 24v engines. With the CR engines there is plenty of room to play with.
MikeyB
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