drdrewdown
Well-Known Member
ok, so i'm sure many of you that attended the Topeka Dyno Run last weekend got to hear my sickly VMAX. It seems that i'm missing out on about 40 horsepower and i believe its been doing this since purchase. I've had it for 2 months and the PO had it sitting outside under a cover. I believe this problem i'm having has been going on since i bought it, but its more noticeable now with the louder exhaust i've installed. We also installed 147.5 main jets at the time of exhaust installation, had to replace a couple of the slide diaphragms with rips in them.
You'll be able to see what happens on the Dyno printout but the symptoms are cutting out in WOT scenarios. It sounded really bad on the DYNO. It sounds like a sportbike hitting the rev limiter.
ran it another time after changing the coils & plugs
seems to have made the graph a little less noisy but the problem is still quite apparent.
I need suggestions from you wizards.
Things i'm going to check & report back are:
Voltages on battery just to make sure its charging right. (havent had any problems with it, just wanna make sure)
I want to look at the fuel filter & perhaps the fuel pump ( i've read about strange things with them)
I also want to look at the plug boots & see if there is any arcing going on.
As well as making sure the motor is properly grounded.
I'm sure I'll need the help of Sean Morley ( good thing he lives 20 minutes away) and anyone else who can chime in for things to check.
Any other obvious things i'm missing or need to check?
Thanks in advance
You'll be able to see what happens on the Dyno printout but the symptoms are cutting out in WOT scenarios. It sounded really bad on the DYNO. It sounds like a sportbike hitting the rev limiter.
ran it another time after changing the coils & plugs
seems to have made the graph a little less noisy but the problem is still quite apparent.
I need suggestions from you wizards.
Things i'm going to check & report back are:
Voltages on battery just to make sure its charging right. (havent had any problems with it, just wanna make sure)
I want to look at the fuel filter & perhaps the fuel pump ( i've read about strange things with them)
I also want to look at the plug boots & see if there is any arcing going on.
As well as making sure the motor is properly grounded.
I'm sure I'll need the help of Sean Morley ( good thing he lives 20 minutes away) and anyone else who can chime in for things to check.
Any other obvious things i'm missing or need to check?
Thanks in advance