After reading some of the comments regarding this thread the past few days, I decided to take my (13/64th) THF cap off last night. My observations since:
PROs:
-Perhaps a little more pep in the mid-ranges. I can't say for sure yet, though. More "research" beyond 4000rpm definitely needed!
-Cleaner emissions. My main catalytic converter was, umm....STOLEN a few weeks ago (wink, wink!), and ever since there has been a noticeable stink coming from below/behind. But since removing the THF cap yesterday, it seems to burn and smell better today. Weird....
CONs:
-A DEFINITE decrease in shift quality due to the hanging revs, obviously. I'd forgotten how bad it was!
-Much worse gas mileage. I left home this morning with just under a half-tank, but that dropped to below a quarter-tank on my 30-mile commute to work (20+ miles of which is 70-80mph Interstate). Not good.
I'm gonna leave the cap off through the weekend and see how things go, but my initial impressions are to keep my THF. The "pros" of not having the fix are very slight, but the "cons" are glaring and annoying.
Just my 27 cents worth...
