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PCIII, Dyno And bad Mileage.........

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  #1  
Old 09-09-2008 | 03:28 PM
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bambamblazer
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From: Franklin, In
Default PCIII, Dyno And bad Mileage.........

Back in july i had the AN big sucker and PCII put on and the bike dyno tuned. Well my fuel mileage went to hell in a handbasket. Like from 40-42 2-up hiway and 38 or so in the city, to 32-33 2-up highway and 29-30 city. I phave put a few hundred miles on it hinking it will get better but nope.
I totally expected to loose 2-3 mpg but not 9-10. The Indy i took it to says that something is wrong and he will put it back on the dyno but he WILL charge me to find out whats wrong and fix it. I am frustrated with this shop and NOT taking it back to them. SOoooo, now the question is do I take it to a different shop or do i try to set it myself???
I will be the first to admit that i know nothing about how to set the PCIII up but i think I could figure it out, I havent even looked at the book yet.

Soooooo, what would YOU do??????
 
  #2  
Old 09-09-2008 | 04:05 PM
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120PLUS
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Here's what I would do:

Get rid of the dual exhaust in favor of a 2:1 - either a V & H Pro Pipe or D & D Fat Cat.

Return or sell (throw away?) the PCIII. Call Zipper's Performance (www.zippersperformance.com) & get their ThunderMax EFI System with Autotune. You'll never need to dyno your bike again (to tune it anyway).

That's where I'd START. Save some cash & get a BIG BORE (NO, not a 95 or 103 either) kit that WORKS. More power with decent fuel mileage is always a GOOD thing.
 
  #3  
Old 09-09-2008 | 04:09 PM
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Glyde
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From: Gilbert, AZ.
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I have a similar setup and my mileage averages in the 38-40mpg range. I'd say take it to another tuner and have them balance the map for performance and mileage. If you go too far on the performance side your mpg will suffer.
 
  #4  
Old 09-09-2008 | 04:14 PM
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I agree the 2-1 is a better option for performance over a 2-2 set of pipes. I personally went with Thunderheaders myself.

As far as problems with the PCIII, I don't think that's the issue. I put the PC on my bike when I got the pipes (already had the SE air cleaner on it). I just downloaded the default map for my configuration and left it like that. I could tell it performed better, and the gas mileage dropped maybe 1-2mpg all around.

I would try it that way, start from scratch and the basic download. It's not hard to do, just attach a computer (with the latest map) and load it. If you have a laptop you can leave the PC on the bike, or detach it and (with a 9v battery attached), connect it to your desktop computer. Start with the basic configuration and see how it runs from there (there is a possibility that it's already at that, but if the original shop tuned it, I'm sure there's something different.)

I installed the whole thing myself, and I'm a mechanical idiot, so you should have no problems. If the default map doesn't help, then you might want to go to a shop - maybe a new one, and see if they can help any.
 

Last edited by Cryptoboy; 09-09-2008 at 05:04 PM.
  #5  
Old 09-09-2008 | 04:26 PM
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WillieC
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From: State College, PA
Default Gas Milage

I have an 06 SG with Rinehart True Duals , a PCIII and the Big Sucker.
I get abpout 47 mpg combo town highway riding. Highway I get up to 53mpg.
Never did a "just in town check" on MPG.

WillieC
 
  #6  
Old 09-09-2008 | 05:24 PM
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pled55
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From: so.jersey
Default bad milage

guess if you know the very minimum about the pc-3 you can adjust it yourself
meaning in your normal cruise range 2-4 grand subtract some of the values
or if you check with some of the folks here on the forum there are a few that know these things as good if not better than some tuners .
 
  #7  
Old 09-09-2008 | 05:55 PM
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From: Michigan
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06 glide classic.. rush slip ons k&n filter pcIII usb 42/45 mpg and 75 hp with 76 ft lbs torque.. The tuner is a good friend and a picky SOB. Oh ya they were fixing my bike cause of a wreck and dynoed it for free!
Dave
 
  #8  
Old 09-09-2008 | 07:33 PM
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skratch
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From: anacoco, la
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i would find someone who has a similar setup to yours. get a copy of their map, or get a map from the pc site that fits your setup. save your map, and then replace it with the new map.

you can also do a search for user 'iclick'. he has done a ton of experimenting and tweaking with his pcIII map to get optimum performance/mileage.
 
  #9  
Old 09-09-2008 | 07:40 PM
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Three for the guys I ride with had the same problem. Not sure if it's a PC problem or the guy tuning it. Two of them gave up and took the PC off and said the bikes run better and their millage is back to normal.
 
  #10  
Old 09-09-2008 | 09:33 PM
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07FLHRCMarinePatriot
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Hmmm, I'm still pulling 50mpg hwy with PC III, K&N filter and V&H slip-ons on an 07 RKC (two-up). But, of course rapping on them sweet sounding pipes will lower it . . .
 


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