30 pilot 340 main stock carb needle middle clip. Lrd pipe airbox outerwairs lid. Starts and idles perfectly does this weird surging at WOT. YouTube vid enclosed.
Surging at WOT
- Thread starter 05blasterblue
- Start date
plug chops determined the 340 main ?
30 pilot ?
how many turns out on the airscrew gave you highest idle with the stock pilot that determined you needed to go leaner ?
https://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/
I've tuned a bunch of blasters in all states of tune and various pipes, including an LRD, not one wanted anything besides the stock 32.5 pilot (high idle less than 2 turns out on airscrew)
unless your at some "in the clouds" elevation ?
leakdown tested ?
float height correct ?
fuel cap vent working ?
reeds good ?
don't count out an electrical situation, they like to show themselves under load and act just like a fuel problem.
TORS deleted ?
ground at coil to clean bare frame ?
unplug key and kill switch one at a time to count them out
unscrew plug cap, inspect up inside, if good cut 1/2" off wire and re-screw it back on
if burnt or jenky looking, replace with NGK screw on cap from auto store
30 pilot ?
how many turns out on the airscrew gave you highest idle with the stock pilot that determined you needed to go leaner ?
https://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/
I've tuned a bunch of blasters in all states of tune and various pipes, including an LRD, not one wanted anything besides the stock 32.5 pilot (high idle less than 2 turns out on airscrew)
unless your at some "in the clouds" elevation ?
leakdown tested ?
float height correct ?
fuel cap vent working ?
reeds good ?
don't count out an electrical situation, they like to show themselves under load and act just like a fuel problem.
TORS deleted ?
ground at coil to clean bare frame ?
unplug key and kill switch one at a time to count them out
unscrew plug cap, inspect up inside, if good cut 1/2" off wire and re-screw it back on
if burnt or jenky looking, replace with NGK screw on cap from auto store
My bad it is the stock pilot jet. Reeds looked fine although they are a little old. Leak down passed. I've never messed with the flot hight maybe I will take a look. I'll blow through the vent cap just to make sure that's working also. Last year it was leaking out of the bowl some now it's not I figured it just needed a good cleaning.
Trimed the plug wire and did another plug chop. I'm thinking its fuel starved. This is my plug chop 1 to 3rd gear.
URL=http://s222.photobucket.com/user/ronscott54/media/20191002_114723_zpsg6nqaojj.jpg.html
Wow why is the smoke ring at the tip of the plug and not at the base!?
If you don’t have enough room, drag the rear brake. The object is to put as heavy of a load as possible on the engine
Plug chops look good, like right on the edge of rich/lean
I like it a little richer (darker ring) for peace of mind, and a little leeway if temps drop.
I'd try one size larger main, if it doesn't bog or foul plugs, run it