1166 with g3cam,120 main,finally stopped stuttering?

[81gs7501166]

Strange results

Test drive 47.5s in,screw 2 out,,float .120.
Best response all across the rpm,I've ever felt,but.
Stutter is worse now ,just slightly but worse.
Leaning the clip to 3rd from bottom next,it's gotta be rich?
Ps,best roll on response from 3k up,in any gear I've ever felt.
And when going wot from 3k in 5th quickly then pulling back to 3/4 -throttle,it picks up torque.
Doesn't that mean the main is still fat?
Thanks

[mmattockx]

And when going wot from 3k in 5th quickly then pulling back to 3/4 -throttle,it picks up torque.
Doesn't that mean the main is still fat?

Usually that means you are lean.


Mark

[bobgroger]

A wideband O2 sensor avoids the guesswork. I have this one: https://www.14point7.com/products/slc-free but they have other pre-built ones. Very quick response.

[posplayr]

A wideband O2 sensor avoids the guesswork. I have this one: https://www.14point7.com/products/slc-free but they have other pre-built ones. Very quick response.

Nice ............

[81gs7501166]

The monster is back!

Went to 3rd clip from bottom,Wow, response still great all across the rpm.
No more stutter at low cruise,well almost,I can barley make it stutter if I just come off idle
ever so tiny at cruise 3-4k,not really noticeable.
Since I've lowered my fuel from .086 to .120 now I think I've leaned the settings enough that I need to go
back and recheck my Main? I'll fatten it up just a tad and test for wot.
Roll ons in 5th from 3k, slam it open fast then back off to 3/4 ,and it picks up torque just a little,
I thought it might be fat,but a post suggest it might be lean,so I'm going to go 1 richer and c.
As always thanks.
Ps low speed (2500 rpm ) roll on is way better now in 5th,don't have to downshift above bout 35mph.
I always felt the low torque was down,but I was blaming it on the cams, wrong I was Again!
Can't wait for my friends to ride it now!

[81gs7501166]

Went richer on the main,around .118 on reamer,runs better on top,guess all that float
adjusting leaned it a bit.
Stutter is coming back though with the richer main.
Changing the clip one leaner, 3rd from top.
I've. Gotta be getting Close?
Thanks

[posplayr]

Went richer on the main,around .118 on reamer,runs better on top,guess all that float
adjusting leaned it a bit.
Stutter is coming back though with the richer main.
Changing the clip one leaner, 3rd from top.
I've. Gotta be getting Close?
Thanks

Once you change the mains, everything else will have to change with it.

I would settle on your final main jet (not a reamed one) and then finalize the tuning. Else you will change the mains again and have to go through it all again.

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

[81gs7501166]

I have a set of unaltered 115s that I'm using for reference.
Yesterday's main is just a Hair larger than those 115s.
Going a little richer again today on main before I do the clip again.
I've ordered clip shim washers for final tuning.
Roll ons were better with clip richer but stutter off idle is worse.
After I'm done with main I'll do clip again then address stutter off idle.
Thanks.

[81gs7501166]

Mains bout 120 now,clip 3rd from botton,top end good,wot from 3k, then back to 3/4 throttle
No longer picks up TQ ,main must be close.
Roll ons were better in 2nd from bottom, I'm going back to that.
Stutter off idle will come back, can I use the air screws to eliminate it?
Or do I need different Pilots? I've went to 47..5s from 40s.
As always thanks from east TN.

[81gs7501166]

Jet # doesn't correspond with caliper measurment!!!!

Thought I was close to right on main,so it's time to use unaltered jets.
Put the 115s in. They are right in between my last two reamed sets.
They run Great! I installed the 45 pilots also, the off idle stutter is Gone!
Air screws on 2.5 out. Clip 2nd from bottom. Roll ons from 3k Great!
It was almost dark when last test ride, so it was a short 5mile ride,more
Testing later today.
I decided to go from the 47.5s back to the 45s after I played with the air screws,
Less stutter off idle with 47.5s with air screws on 1.25 out,so I reread the pilot tuning section
And determined they were too large.
And it's hard to measure a reamed jet, the ones I thought to be 118ish were smaller than the unaltered 115s.
I'll probably order some 117s and 120s for future testing.
I've had these things off so many times now it's time to RIDE!
Thanks for all Help!
Next project a Damper?

[81gs7501166]

5k to 9.5k unbelievable!.!?!?

I can't explain what Happened?
The 115s Really seem to WAKE this thing up above 5k!
It accelerates so hard now from 5k up its SCARRY to this old Man!
Everything is Perfect!
Just a SLIGHT something when transition from idle to roll On!
I also removed the restriction in my baffle .
Basically removed a washer plugging a hole in the center , hole went from
3/4 in to 1.5 in.
It's [ jerk u r arms clean off now.)
I'll leave it alone until late the 117.5s come in then test one more Time!
The off idle is liveable ?
Thanks from a happy man.

[Arronduke]

I have enjoyed following your experience with jetting, dont forget to update when you can.
I will be heading down the same part I think and it seems daunting!
I have RS36 carbs.

[81gs7501166]

Mistakes I've made.
Don't ream u r own jets to save a few Bucks!
Get the main right first,after all other mods are done,( pipe,pods,adjust valves]
Follow the tuning guide .
Have clip shims available,pilots,and mains.
Remember what I've learned bout float height!
And maby you'll not have them off 20+ times.
Oh and one more thing,never give up!
Thanks

[posplayr]

Mistakes I've made.
Don't ream u r own jets to save a few Bucks!
Get the main right first,after all other mods are done,( pipe,pods,adjust valves]
Follow the tuning guide .
Have clip shims available,pilots,and mains.
Remember what I've learned bout float height!
And maby you'll not have them off 20+ times.
Oh and one more thing,never give up!
Thanks

Now go have it dyno tested to see how you did on AFR

[chef1366]

I'd get a dynojet kit.