440/460 Hybrid question

[Canadian farm boy]

I've also got .030" filed off the flywheel key.

 

[mdavlee]

100/116/78 and it would 4 stroke to 16k easy.

 

[Canadian farm boy]

100/116/78 and it would 4 stroke to 16k easy.

The numbers I used in my current hybrid were recommended buy another builder.(102/118/78). My saw IMO works great. Has good speed, throttle response make decent torque to pull a 25" bar. I really like it. Great work saw. I like it a lot.

Now what I'm wondering is what would I expect to see using the numbers you mentioned? My next hybrid I'd like to see as more of a gtg saw. I'm planning on using it with an 18"-20" bar.

What's your thoughts?

 

[mdavlee]

The numbers I used in my current hybrid were recommended buy another builder.(102/118/78). My saw IMO works great. Has good speed, throttle response make decent torque to pull a 25" bar. I really like it. Great work saw. I like it a lot.

Now what I'm wondering is what would I expect to see using the numbers you mentioned? My next hybrid I'd like to see as more of a gtg saw. I'm planning on using it with an 18"-20" bar.

What's your thoughts?

This one did fine with a 25". For playing in 10x10 I might go 95-96 110 and 75 with epoxy. I run higher exhaust than a lot of guys. It's my preference and makes a little lower compression.

 

[Canadian farm boy]

This one did fine with a 25". For playing in 10x10 I might go 95-96 110 and 75 with epoxy. I run higher exhaust than a lot of guys. It's my preference and makes a little lower compression.

The 046 jug I've got coming has already been ported. I don't know what the numbers are yet but I will definitely check them before I do anything. I don't want to mess up a good thing.

I think I'm gonna order a couple extra Pistons to "chop" up and see what I like.

 

[MustangMike]

I generally like to go OEM, but the Meteor piston I saw for the 460 had wider skirts, which will give you more latitude when porting.

 

[Basher]

Do you have such a hybrid? Did you port it yourself? Any vids of it?

Thanks.

I do all my own porting, I have 4 hybrids, built the first one in 07 and improved upon them somewhat by 2010, they have almost replaced my beloved 044`s. Randy can tell you where the numbers I posted came from.

 

[MustangMike]

You only posted one timing #, but it is the same # as on one of my favorite saws!

 

[mdavlee]

I've set 460s at 97-98 and 114. They still pull a long bar just fine to me. Full comp on a 110dl bar is a load for a 76cc saw.

 

[MustangMike]

I run RSLH on my 36" bar. I'm sure it could pull full comp, but this seems to work well and should clear the chips better.

 

[Basher]

100/116/78 and it would 4 stroke to 16k easy.

That is a very good set of numbers to shoot for, near the perfect balance so I have found. The lower case capacity of the 044 needs a lil bit longer to fill the combustion chamber.

 

[Miller Mod Saws]

I've set 460s at 97-98 and 114. They still pull a long bar just fine to me. Full comp on a 110dl bar is a load for a 76cc saw.

Have you tried a low intake on these? I generally don't run this low of intake but I like 100/116-117/82. Something about these saws seem to like a low intake. Guessing it's the small case capacity feeding the top end.

 

[mdavlee]

Have you tried a low intake on these? I generally don't run this low of intake but I like 100/116-117/82. Something about these saws seem to like a low intake. Guessing it's the small case capacity feeding the top end.

81 is as far as I went. You start loosing some push for the charge with less than 30° of case compression.

 

[juttree]

Now you guys are making me want to say the hell with it and port the damn thing instead of running it first. Sometimes I'm a methodical procrastinator with a touch of OCD and the "*f-word it's" all rolled into one.

 

[Canadian farm boy]

@juttree when you are porting the intake on the 046 jug there is a small "bump" inside the intake runner. Be careful when grinding on that spot. The material is very thin and you can easily make a hole.
I found out the hard way. I fixed my screw up with a bit of JB weld.

 

[mdavlee]

I've done that 3 or 4 times.

 

[Canadian farm boy]

I've done that 3 or 4 times.

Now I don't feel so bad. Lol

 

[mdavlee]

Now I don't feel so bad. Lol

Best running ones I've built did that. Not sure if the JB weld does it or the bigger intake opening. Boot covers most of it anyway.

 

[Basher]

If you don`t have JB Weld on the outside of your Hybrid jug you havn`t gone far enough.

 

[Canadian farm boy]

Best running ones I've built did that. Not sure if the JB weld does it or the bigger intake opening. Boot covers most of it anyway.

It's gotta be the JB. That chit is magical.