ET 967 Tuning Thread
- Thread starter McDog
- Start date
joecef
Live fast, Die Fat
- Location
- Canada, EH
Well I’m talking stock ignition. I’m going to run this till I get my hands on either sell or tl
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joecef
Live fast, Die Fat
- Location
- Canada, EH
Okay cool. Haven’t used a stock ignition in a long ass time
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joecef
Live fast, Die Fat
- Location
- Canada, EH
So I just ripped the carbs down. I’m running now
Carbs
105 main
145 pilot
2.5 n/s
Black spring
Pop off 10psi
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Carbs
105 main
145 pilot
2.5 n/s
Black spring
Pop off 10psi
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Jcary85
Site Supporter
- Location
- Glenmoore pa
I’m no expert but 10 psi is too low. Try a 115g spring for 21psi
joecef
Live fast, Die Fat
- Location
- Canada, EH
- Location
- sask, canada
Agreed, somewhere around 21psi would prob work a lot better
joecef
Live fast, Die Fat
- Location
- Canada, EH
Art got back to me. This is what he just recommended
135 pilot
125 main
17 psi pop off
2.3 needle
Silver spring
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joecef
Live fast, Die Fat
- Location
- Canada, EH
90 in line??
I just dropped down to a 60
I hate tuning
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Did you ever open your nozzle to 90mm and did it help? Running a super similar set up at 87.75mm right now and feel like I’m missing out on a little on the pump end but also don’t want to go too big this early on in my tuning.
Not yet had some other issues to sort. Will be testing this weekend and if everything is sorted and nothing has changed will bore next week and report back after testing
- Location
- Riverside, CA
I know this was already addressed, but peak fuel pump pressure
is ~7.5psi and idle is near 3.5 psi, no matter what size fuel pump
is used. You didn't list if your return line was modified, but if it
was not, I would expect it to load up on idle.
Bill M.
3.5 to 7.5psi from a small ~17cc weed wacker to a Mikuni high volume
pump.
joecef
Live fast, Die Fat
- Location
- Canada, EH
Has anybody done the bottom end epoxy/porting themselves? Just buy the top end from ET and good oem bottom end and some epoxy and a die grinder? I'm wondering if this is a thing that can be successfully done by a more adventurous DIY'er or if you really need to buy a complete motor from a builder.
Cases have to be fly cut pretty big on a mill to accept the big sleeves on these. Might be able to do some notchy work with a die grinder but cases get pretty thin and its probably better to spend the $350 to have it done right.