hdbill
ArboristSite Operative
I thought it was for rodeo practice
Mastermind Meets The Echo CST-610EVL
- Thread starter Mastermind
- Start date
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I thought it was for rodeo practice
P.S. Just so long as Belgian doesn't change his avatar, life is good ....
Agreed!
This is going to be a very interesting build. I cant wait to see the vids.
Adirondackstihl
Flyz, Fuel & Fotos
izza:izza:.............. one for each cylinder
Rudolf73
Addicted to ArboristSite
+ :beer::beer:
Mastermind
Work Saw Specialist
I got all four of the av bushings squared away and checked port timing and squish. Both jugs are spot on.....
EX: 109
TR 121
SQ .021
EX: 109
TR 121
SQ .021
Sprintcar
Chainsaw Slut
Mastermind
Work Saw Specialist
What, where, when? There fixed it for ya!
The jugs Jerry.......it's all about the jugs ya know. :msp_thumbup:
GBD
ArboristSite Operative
Well, that is a lot of transfer duration on a 30`ish cc cylinder! :msp_ohmy: As I remember from the times I used to port a lot of string trimmers, 127* to 130* depending on port withs, would be more like it on a 30 cc cylinder. :msp_thumbup:
Those are some crazy numbers. Only 12° of blowdown!
How in the world do you plan to work inside that tiny cylinder? My right angle hand piece is pretty snug in a 50cc.
Mastermind
Work Saw Specialist
I agree.
It has a domed piston crown as well. I've figured out how to cut the squish in those though. I intend to take enough out to allow me to raise the exhaust, still have good solid compression, and gain some blowdown.
I'm not planning on going over 170 on compression on this one though. A crankshaft weakness has been mentioned before and there are no decompression valves.
GBD
ArboristSite Operative
Those small cylinders are very easy to overport because of small volume to wall area relationship.
RVALUE
Addicted to ArboristSite
dental tools
Mastermind
Work Saw Specialist
I missed Brad's post till you quoted it. I won't be doing anything in the transfers and just working on the exhaust port can be done from the outside.....
thomas1
sodium pentothal
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Ambull
OCD Muscle Saw Collector
Wow that's one heck of a project. I am quite interested to see how you do. I have one of those 610 POS's and I can't stand using it, for its lack of power. If this one turns out good you will be seeing another in the near future.
To respond to an earlier post, the pistons move in exactly the opposite direction of each other, thus cancelling each others motions out. The crank needs no counter balancing. Because they fire at the same time, they can be run with one carburetor and one coil. A very smooth running saw.
To respond to an earlier post, the pistons move in exactly the opposite direction of each other, thus cancelling each others motions out. The crank needs no counter balancing. Because they fire at the same time, they can be run with one carburetor and one coil. A very smooth running saw.
Mastermind
Work Saw Specialist
I'm thinking it should be much better......I do wish I could have used it enough to get a "feel" for what was lacking.....
Adirondackstihl
Flyz, Fuel & Fotos
opcorn:
