Planning Andrews cam upgrade, other things worth doing while inside?
#31
#32
Thanks
#33
#34
Front Cyl:
180psi comp
Leakdown - 100 psi input - 96 psi on secondary gauge
Rear Cyl:
165 psi comp
Leakdown - 100 psi input - 95 psi on secondary gauge
#35
Leak down is good and the 15psi difference in compression is within the generally accepted variance of 10% but I would be keeping an eye on it. It would have made more sense if the rear cylinder had the better compression based on what the plugs look like. At this point, I would be concentrating on the carb tuning and put compression on the back burner.
#36
#37
Leak down is good and the 15psi difference in compression is within the generally accepted variance of 10% but I would be keeping an eye on it. It would have made more sense if the rear cylinder had the better compression based on what the plugs look like. At this point, I would be concentrating on the carb tuning and put compression on the back burner.
I have the software now, so that will be the next thing to work on.
First I wanted to address the oil breather system and put in a catch can. I got that installed, and noticed I had to clean and re-oil the K&N filter, as it looked dirty in one section. What I thought had been just oil mist, was fuel and oil mixed. Now that the oil breaths into the catch can, there is fuel soaking the filter that is still occurring. It's washing the red oil off the air filter in one spot. First, I made sure the accelerator pump was aimed correctly and squirts into the carb opening. I removed the carb and checked the float using the bench test measurements. It was off about 1/16-3/32" too high (as in filling too high). I corrected this, and readjusted the A/F mixture at idle. Went for a 250 mile ride today, and I still have a slight seeping out the bottom of the air box. (I'll probably use the "maxi-pad" trick to keep that in check)
So, I read Doc's post on the fuel mist blow back that can naturally occur. My bike will spray fuel with the air filter removed, when revving up and in a certain RPM range, just as the post describes. From what I read, this is normal, but how much is too much? When changing to the 21 cams, did I introduce some intake/exhaust unbalancing that's causing this? (Or is this not worth worrying about. It sounds common)
#38
Update:
I’ve been messing with the DTT software and ignition timing and think I have it pretty good (maybe not optimal, but that's what a dyno would be for, should I want to get it dialed in further).
One thing that has never went away, and it seems to be here just since I put in the Andrews 21 cams. I get a lot of fuel soaking up my K&N air cleaner, and it sprays out enough to cover the right saddlebag, right side of my seat and passenger seat, and some even up on the tour pack. This is after a longer ride, usually at higher speeds around 60-70 mph (my daily drive to work is 35 miles on a state HWY, if I wipe up the bike before I leave work, it will be spattered on when I get home).
I’ve put in a new float needle, and even adjusted the float level about 1mm lower than the manual states (thinking maybe fuel level was still too high). I’m running the main jet at the stock 190, slow jet is an aftermarket 46 (stock was 45). I’ve got 2 washers under the carb needle. The needle is the stock CV needle for my carb (I wasn’t able to get a hold of a sportster needle). I've got the AF screw out 3 turns. Mileage still seems to be around 31-33 highway (I'm the guy always needing to fill up when I'm on a ride).
I don’t have the stock air box since the last post. I've since installed a DK Custom backplate and round K&N (then I can still utilize the stock football cover). I thought maybe the stock box was choking a bit, even with a K&N filter. This did not improve the excess fuel, though.
Has anyone ever experienced this before? (I debated whether to put this in a new post)
I’ve been messing with the DTT software and ignition timing and think I have it pretty good (maybe not optimal, but that's what a dyno would be for, should I want to get it dialed in further).
One thing that has never went away, and it seems to be here just since I put in the Andrews 21 cams. I get a lot of fuel soaking up my K&N air cleaner, and it sprays out enough to cover the right saddlebag, right side of my seat and passenger seat, and some even up on the tour pack. This is after a longer ride, usually at higher speeds around 60-70 mph (my daily drive to work is 35 miles on a state HWY, if I wipe up the bike before I leave work, it will be spattered on when I get home).
I’ve put in a new float needle, and even adjusted the float level about 1mm lower than the manual states (thinking maybe fuel level was still too high). I’m running the main jet at the stock 190, slow jet is an aftermarket 46 (stock was 45). I’ve got 2 washers under the carb needle. The needle is the stock CV needle for my carb (I wasn’t able to get a hold of a sportster needle). I've got the AF screw out 3 turns. Mileage still seems to be around 31-33 highway (I'm the guy always needing to fill up when I'm on a ride).
I don’t have the stock air box since the last post. I've since installed a DK Custom backplate and round K&N (then I can still utilize the stock football cover). I thought maybe the stock box was choking a bit, even with a K&N filter. This did not improve the excess fuel, though.
Has anyone ever experienced this before? (I debated whether to put this in a new post)
#39
Det,
I don't have an answer to the excess fuel but a Stage I TC88 with a set of Andrews 21 cams should be getting at least 40mpg, or better. So the 31-33mpg, if accurate tells me you are running way rich. If you have fwo washers under the needle, i.e. raising the needle, take them out. I am thinking that excess fuel may be coming up via the emulsion tube with the needle raised. I assume you are running the stock needle? You will probably have to reset the A/F adjustment; not sure. I also think you can drop the main to 185 but would run a couple of WOT plug cuts with new plugs first.
I don't have an answer to the excess fuel but a Stage I TC88 with a set of Andrews 21 cams should be getting at least 40mpg, or better. So the 31-33mpg, if accurate tells me you are running way rich. If you have fwo washers under the needle, i.e. raising the needle, take them out. I am thinking that excess fuel may be coming up via the emulsion tube with the needle raised. I assume you are running the stock needle? You will probably have to reset the A/F adjustment; not sure. I also think you can drop the main to 185 but would run a couple of WOT plug cuts with new plugs first.