HQ 500 Cams & PCV
Attached is a screenshot of the fuel table that the Auto tune has created for the front cyliner. I'm concerned that for one reason or another the Auto Tune is not doing it's job. Perhaps the 'cat in the mid-pipe is causing issues?
I'm not running an HQ cam set, but why are you using 14.7 past 20%? That's even a bit high in the cruise range, but beyond 15-20% TP I'm not surprised you are getting some hesitation, as that's too lean for a roll-on. Here's my Target AFR table, used for both cylinders:

I'm running SE255 cams, which aren't the same but should be close enough for a trial, as they run well in my '07. Plug these values in and let us know how it runs. Be advised that without an oil cooler you may find these near-stock cruise-range AFR's to be a bit on the lean side and immoderate heat may be a side-effect.
Last edited by iclick; Jun 30, 2009 at 10:57 AM.
I'm using 14.7 past 20% because I don't know what the hell I am doing.
Below is the new table auto tune made for the front cylinder. Looking at the 2% TPS column, is it normal to have a jump from -55 to -72 to -20 in a span of 500rpms?
Below is the new table auto tune made for the front cylinder. Looking at the 2% TPS column, is it normal to have a jump from -55 to -72 to -20 in a span of 500rpms?
I think I would deactivate AT and go find a canned map on the PC site for your cams, or something close, and give it a try. If it runs fine with a canned map with no AT, perhaps AT is at fault, but I don't think that is the problem. It's tempting to at least suspect that there is a problem with the cam install, except that the hesitation is apparently related to TP, not RPM. I assume that if you hold 1/4-throttle as RPM's build and have no problems, and hesitation occurs only as the throttle is rolled on regardless of RPM, it isn't something related to the cam install.
Sumping also comes to mind, but I would think that would also be RPM-related. Have you noticed oil temps running higher than normal? If the o-rings in the cam plate or oil pump are not positioned properly you can have sumping, which is more oil going into the crankcase than can be scavenged out. When this happens performance is decreased as the flywheel crashes against the accumulated oil, how much depending on how much oil is present, and if enough oil temps can skyrocket. To find out if it is sumping, take a ride that fully warms the bike. Remove the plug directly under the crankcase, but be careful since it is a steel plug going into aluminum and cross-threading it is not something you want to think about, much less do. A good drain quantity is ~4 oz., and anything over 6-8 oz. would cross the line of acceptability.
Did you buy the PCV from Fuel Moto? If so, call them first--then if they can't help call DynoJet. From my experience both of these have excellent CS. I can't imagine that this is a PCV problem, though. Give HQ a call, too, as I've heard their CS is also good.
I'm really just throwing ideas out since I'm mostly stumped at this time.
You're correct in assuming that @ 1/4 throttle the motor continues to spool up. I'm confident that it's not a cam install issue, but a fuel or perhaps timing ailment. It has crossed my mind to take it to a local shop that has a dyno and let them create a map. But that really defeats the purpose of spending the money on the auto tune, and I'm unsure of their reputation. I'll call FM on monday and see if Jamie has any suggestions.
To beat a dead horse some more, does anyone else have concerns that the catalyst may be throwing off the 02 sensors? This is on a california bike, and I believe it's the first year the cat is in the midpipe, not the mufflers themselves.
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Will it pass the emissions test without the cat?
Regarding emissions, I have no clue whether it'd pass or not. From what I understand, the early 2000 bikes had the cat in the muffler. If I have to buy an old pair of slip ons to pass smog, that's what I'll do.
Last edited by HauerMG; Jul 8, 2009 at 02:46 PM.




