10-01-2018, 03:08 PM | #113 | |
Hot Dog
Drives: '17 1SS 1LE Join Date: Feb 2016
Location: Metro Detroit
Posts: 1,937
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Quote:
Check out the other bullet points from post #108. Then consider they work together to form a multi-dimensional strategy. Of course there are limits. Those limits are beyond this threads' topic however. That's a major point. How does "fully loaded going up a hill in 6th gear" differ from WOT in 1st gear in terms of observed engine load? Of course it's a rhetorical question; it doesn't. You still need to mentally separate vehicle acceleration rate from engine load.
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2017 "M1SS1LE" in Hyper Blue w/PDR
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10-23-2018, 01:53 PM | #114 |
Drives: '06 Pontiac GTO M6, '19 F150 2.7TT Join Date: Nov 2008
Location: Charleston, SC
Posts: 1,425
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if you have done a lot of lugging on the engine like i used to do with my '87 IROC the crank can eat into the rear main seal. lots of pressure on the crank.
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10-25-2018, 11:26 PM | #115 |
Drives: 2018 SS 1LE Hyperblue Join Date: Jul 2017
Location: Lacey, WA
Posts: 388
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Instead of personally attacking each other, why don’t we come back to the question at hand.
It seems we need to break it into 2 questions- What is lugging? And What harm does it do? What is lugging? I thought lugging was what happened when you had the car in gear and slow down to below idle rpm. It sounds the other ideas posted here focus on load, rpms and duration. I know GM has left this vague in the manual, but it’s not an uncommon term. It sounds like we are all close to the same definition What harm does this do? I’m no engineer but I would imagine something similar happens in all those scenarios. Higher cylinder pressures, greater heat build up, potential for pre-ignition. I saw a decent video by the engineering explained guy about why it’s bad but he doesn’t go into the actual math. Can someone speak more to these conditions? Now I would imagine the tune tries to prevent too much of this with throttle position mapping, pulling timing, etc. but nothing is completely bulletproof. Plus when we modify our cars we introduce unknowns into the equation. I like the discussion but avoid the petty bickering and maybe we can all learn something. |
10-26-2018, 06:09 AM | #116 | |
Drives: '18 1SS 1LE Join Date: Sep 2017
Location: Pennsyltucky
Posts: 2,580
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Quote:
When a larger aftermarket camshaft with extra duration is installed, the point where the lugging sensation occurs increases as the power band has moved up higher in the rpm range. Where a stock cam can produce low rpm usable power to move the vehicle effectively, a larger cam will struggle with low rpm torque production making idle speed parking lot maneuvers a little more interesting.
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