new cams
Last edited by Rhonda; Jun 6, 2009 at 10:51 PM.
2. I am not familiar with the details of the PCV, but there are limitations with its predecessor PC's, particularly with ignition timing. Whether the tuner was familiar with the PCV or not may be a contributor to your relatively low numbers, also.
3. Have you asked Jamie at Fuelmoto for a map for the cams you now have?
4. Kevin isn't going to BS you about what those cams will do when installed correctly and tuned properly.
5. Ride the bike and keep track of your mileage for a couple of tank fulls of gas. Chances are it's probably running very rich and your mileage will be in the mid-30's suggesting that the tune isn't what it should be.
Hang in there; it'll get sorted out.
Neither the PCV nor its programability in the ignition-advance tables are his problem given a good tune. As we all well know that is the big variable with any aftermarket tuner except the PCV Auto-Tune, which tunes itself.
I think you're a good candidate for an Auto-Tune module, and I would discuss this possibility with Jamie at FM. It costs $300, cheaper than a dyno tune, and if you use Jamie's Target AFR's I can guarantee you an improvement assuming the cams were installed properly and you don't have a problem somewhere else. BTW, I wouldn't consider AFR of 13.5 at WOT to be a bit lean of ideal, and would rather see 12.8-13.2 for best performance, as this is conventional wisdom. Jamie uses 13.0 in his maps.
Not to inject the improbable into the equation, but one tooth off for the cam/crank chain on the cam install would make a big difference in performance. There is the possibility the timing on the cam is off due to an improper install, but I would think that would be a long-shot. A bad grind on one or both cams would be another long-shot, although not unprecedented.
What is your tuner's explanation of the low dyno numbers? Did he install the cams? Did you do anything else during that upgrade (CR increase, porting, etc.)? If he installed the cams and did the tuning I would think he would hold responsibility for making sure the numbers were reasonable, which they clearly aren't IMO.
BTW that cam set and most others will likely adversely affect low-end performance in a stock engine with 9.2:1 CR. The only cam set I know of that will not is the SE255 with its ultra-early intake close.
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While I hear your disappointment I tend to side emwold who asked if you like how it runs? I remember when I tore into my 05 88, did the 95 upgrade, cams, minor headwork and used the Thundermax Auto Tune. Put it on the Dyno just to get the numbers and thats when I gt disappointed, because truth was it ran like a scalded dog and would pull the wheel off the ground in 1st and 2nd. But I never could get past my expectations with the numbers. Listen to Carl and Iclick, they know from whence they speak...Good Luck to you!
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