Quote:
Originally Posted by 907dave
I'll shoot.........I believe making a lope tune would consist of advancing the hell out of the timing @ idle to produce the white smoke and crappy idle.
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Anyway, some common ways to make a lope tune involve (but are not limited to):
Increased MFD @ idle. This causes a "war" of sorts between the commanded fuel rate and the base idle speed. The higher MFD will cause a high idle but the base idle speed wants to maintain a low idle (500-750) so there's more of an on-off type idle. In my experience (which isn't much because I don't care about a "ruh, ruh, ruh" idle) this makes for the "big cam" sound better than.......
Substantially increased ICP @ idle. This will usually cause a rough idle with an intermittent "hits and misses" type of idle. Again, this is my limited experience with rough idles talking.
White smoke comes from retarded SOI. This also makes the engine considerably more quiet (works really well for quieting down the 95-97 trucks that have single shot injectors).