I wanted to share some results. I feel like I'm getting much closer now.
Previously I was running:
17.5 pilot, 420 mains, stock jet needle with nylon washer
and another shim which got me between the 4th and 5th
notch. Temps around 25 F.
low end - no bog
midrange EGT's - I could get it above 1275
WOT EGT's - 1150 range - maybe a little less
Personal feeling: It was an animal in low end and midrange,
but very flat on top end. The problem was I needed to
get the temps down on midrange before going to smaller
mains. With 1275, I felt I didn't have much of a cooling
down range to go to, if I dropped the mains.
Next Setup:
20 pilot, 410 mains, 942 jet needle with eclip in position 3.
Temps around 25 F.
low end - I noticed a slight bog when riding on trails
midrange EGT's - barely 1100
WOT ETG's - In the 1050 range
Personal feeling: Too rich all the way through the
throttle range.
From there:
20 pilot, 400 mains, 942 jet needle in position 2.
Temps around 25 F.
low end - I did have one time with the bog
midrange EGT's - I could get them to 1220 MAX.
Mostly in the 1175 range.
WOT EGT's - 1150 range
Personal feeling: Much better throttle response and sled
was coming to life on top end. I would have put in 390's,
but I didn't have any.
How do I get rid of the bog?
If I could have, then I believe this is the setup I would
run with the 390 mains.
I'm starting to believe that the 942 jet needle burns
cooler than the stock needle due to the smooth taper
rather than the noticable steps in the stock needle.
I can't say that for sure, because I didn't compare apples
to apples.
What I'll try next:
17.5 pilot, 390 - 410 mains, 942 jet needle.
Oh, I did ride my 700 this weekend with RK Tek head and
290 mains. The sled also has DPM. There were two of
us riding and I wanted to get some miles on that sled.
Also, it was nice to jump on one sled and then jump on
the other to compare.
That 700 engine was much crisper than my 800 all
through the throttle range. Its just that noticable a
difference from my 800. The last setup above that I
tried with the 800, I was much closer to the feeling
on my 700. I just believe I needed 390 mains and I'd
be there.
This has been a frustrating Winter for me, but I'm almost
there. And when its done - it'll be time to trade!!!
Previously I was running:
17.5 pilot, 420 mains, stock jet needle with nylon washer
and another shim which got me between the 4th and 5th
notch. Temps around 25 F.
low end - no bog
midrange EGT's - I could get it above 1275
WOT EGT's - 1150 range - maybe a little less
Personal feeling: It was an animal in low end and midrange,
but very flat on top end. The problem was I needed to
get the temps down on midrange before going to smaller
mains. With 1275, I felt I didn't have much of a cooling
down range to go to, if I dropped the mains.
Next Setup:
20 pilot, 410 mains, 942 jet needle with eclip in position 3.
Temps around 25 F.
low end - I noticed a slight bog when riding on trails
midrange EGT's - barely 1100
WOT ETG's - In the 1050 range
Personal feeling: Too rich all the way through the
throttle range.
From there:
20 pilot, 400 mains, 942 jet needle in position 2.
Temps around 25 F.
low end - I did have one time with the bog
midrange EGT's - I could get them to 1220 MAX.
Mostly in the 1175 range.
WOT EGT's - 1150 range
Personal feeling: Much better throttle response and sled
was coming to life on top end. I would have put in 390's,
but I didn't have any.
How do I get rid of the bog?
If I could have, then I believe this is the setup I would
run with the 390 mains.
I'm starting to believe that the 942 jet needle burns
cooler than the stock needle due to the smooth taper
rather than the noticable steps in the stock needle.
I can't say that for sure, because I didn't compare apples
to apples.
What I'll try next:
17.5 pilot, 390 - 410 mains, 942 jet needle.
Oh, I did ride my 700 this weekend with RK Tek head and
290 mains. The sled also has DPM. There were two of
us riding and I wanted to get some miles on that sled.
Also, it was nice to jump on one sled and then jump on
the other to compare.
That 700 engine was much crisper than my 800 all
through the throttle range. Its just that noticable a
difference from my 800. The last setup above that I
tried with the 800, I was much closer to the feeling
on my 700. I just believe I needed 390 mains and I'd
be there.
This has been a frustrating Winter for me, but I'm almost
there. And when its done - it'll be time to trade!!!