Chainsaw Collectors.se

Chainsaw Collectors.se

This is a international forum in Eng.
 
It is currently Oct 23rd, '14, 22:16

All times are UTC [ DST ]




Post new topic Reply to topic  [ 49 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 7th, '09, 09:58 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
....sorry a 70 mm bore and 40 mm stroke will be 154 cc. (35x35xпx40 = 154 cc.)


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 7th, '09, 14:33 
Offline
Collector Forum's Finest
User avatar

Joined: Jul 7th, '06, 17:40
Posts: 1389
Location: Midwest
Country: USA
Marco, Why not put the 66mm or 70mm on a 48mm stroke :whistle: . Seen one with a 66mm on a 48mm and she was pretty fast. If that is what you are after big cc and fast and that way you save some cash not having to stroke the other crank. :wink:

_________________
New website for Chainsaw Repair link ChainsawRepair

ImageImageImageImageImageImageImageImageImage


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 8th, '09, 06:38 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
dear cut4fun,
I'd like to ask you if you have seen a 48 mm stroke 090? was this a crankcase from another chainsaw (if it is wich one?) or a 090 modified one?
if it is the cylinder must be completely different in port windows and waste windows as 48 mm stroke oblige you to raise the conventional cylinder of about 4 mm and porting will be too extreme.
I think also there will be problem between the crankcase and crankshaft encumbrance.
My idea was only little raise in stroke (42 mm) and so raise the cylinder windows only 1 mm. This is a way used also in tuned piaggio vespa (an italian scooter) changing the chrankshaft axle. In this way waste and port phases will allow about 8000-9000 rpm without upsetting the cylinder (I've done my calculation). I've done this in the past on motorcycle engines and will work: raising the cylinder (with gaskets) you'll raise windows, extend phases, increase rotation= more power.
Thank you all!!


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 8th, '09, 06:55 
Offline
Collector Forum's Finest

Joined: Sep 12th, '06, 05:45
Posts: 1764
Location: USA
Country: Midwest USA
I belive Kevin is talking about a 166 with a 090 jug. The 166 is a long stroke.

Bill

_________________
All pictures and threads posted by me are to remain in the thread in which the are posted unless you ask first. This includes "clones" It is simple just ask


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 8th, '09, 06:57 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
Let me think about...May be....if you cut the head of a 090 cylinder (make an hole, big as the bore, on the head), you can extend the cylinder height a little bit and fit it with the optimal windows height (you're not obliged by the presence of a fixed head).After you'll built a removable head, as the ones in the pictures. May be this is way the head is modified in such tuned 090.
In this way, in effect 66mm bore x 48 mm stroke= 164 cc = 10 cu inch!!!!!
I think this is the way!!!
The only problem is to find a 48 mm stroke crankshaft (or to modify the original!)
Any idea?
Let me ask to a friend of mine, who works on lathes.
Marco


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 9th, '09, 00:34 
Offline
MR. BIGSAW
User avatar

Joined: Sep 16th, '06, 04:27
Posts: 571
Location: SULTAN WASHINGTON USA
today I grabbed waynes saw when he was not looking o:)

here ya go


You do not have the required permissions to view the files attached to this post.

_________________
Looked good Rick but that bar is overkill ....Mc Bob

Thanks Bob, From now on just call me,, "KING OF OVERKILL"
________GO BIG OR GO HOME woo hoo________
http://www.youtube.com/user/mrbigsaw


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 9th, '09, 06:50 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
knucklehead wrote:
today I grabbed waynes saw when he was not looking o:)

here ya go


Fantastic pictures!!!!
The bore is of sure more than 66, maybe 70 mm (stroke 40mm?)
Is in your opinion a modification of a normal 090 cylinder/head (enlarging the bore, removing head, new piston, new head...) or a new special kit?
If so any specification to modify the original or to rebuilt a new kit?
Please cannot take some of the inner and the bottom part of this cylinder?
Is the crankshaft from a contra (see removable rod and 1-step cylinder lodging)?


Thank you from Italy!!!!
Marco


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 9th, '09, 17:49 
Offline
MR. BIGSAW
User avatar

Joined: Sep 16th, '06, 04:27
Posts: 571
Location: SULTAN WASHINGTON USA
after I took the pics I put the saw back where I found it so he woudnt notice I had played with it :whistle:

The bore might be 76mm as you can see a 66mm sitting in it,

It appears to be a original bottom end but can not confirm without a further tear down.

The only diff from a stock saw looks like the cylinder and piston.

as you can see in these pics there is a lot of finger porting done to this custom built cylinder.

the piston's single L ring configuration is not common in saws and could be from bike or other source.

this saw does look like it would still run but I could not locate a gas can to try it :hairpull:

_________________
Looked good Rick but that bar is overkill ....Mc Bob

Thanks Bob, From now on just call me,, "KING OF OVERKILL"
________GO BIG OR GO HOME woo hoo________
http://www.youtube.com/user/mrbigsaw


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 9th, '09, 20:49 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
knucklehead wrote:
after I took the pics I put the saw back where I found it so he woudnt notice I had played with it :whistle:

The bore might be 76mm as you can see a 66mm sitting in it,

It appears to be a original bottom end but can not confirm without a further tear down.

The only diff from a stock saw looks like the cylinder and piston.

as you can see in these pics there is a lot of finger porting done to this custom built cylinder.

the piston's single L ring configuration is not common in saws and could be from bike or other source.

this saw does look like it would still run but I could not locate a gas can to try it :hairpull:


Thank you for the info!!!
Scaling down the picture )referring to 66 mm piston) my result is about 70 mm bore.
What do you mean with "finger porting", I don't know the translation in Italian but what i know, working on motorbike 2 stroke engines is that there are porting/waste windows and channels in the cylinders.
Have you got a broken 090 cylinder (or, better, a 10 cu inches kit, but i think is rare as platinum) or how to find it? I'll try to overbore an original broken 090 and obtain a 10 cu inches one. Here in Italy 090, like contras or 070 are very rare, mines came from Germany....

Thank you


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 10th, '09, 01:47 
Offline
Collector Forum's Finest

Joined: Oct 26th, '08, 20:40
Posts: 143
Great pics! I love it! If....... and I mean just supposin Wayne were to go to wiseco and have a few of these piston/cylinder sets made, I would definately be in for one or two. Hypothetically speakin of course. ::))


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 10th, '09, 02:27 
Offline
Collector Forum's Finest
User avatar

Joined: Nov 22nd, '05, 23:09
Posts: 4308
Location: Weston NSW Australia
Country: Down under
Sounds as if the ring is a Dykes ring if it is of an " L " shape Rick
We still need better pics of the transfer ports so rip her down again young fella

Mc Bob. :whistle:

_________________
Truely a man of many colours "Mc Bob", "Atomic Bob", Mc "Bender" Bob, Mc "Whiz" Bob, "Herr" Bob and "Whatever" Bob.

Thats why you should own a Mac first.
McBob .. 1949 and still kicking.


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 10th, '09, 06:02 
Offline
MR. BIGSAW
User avatar

Joined: Sep 16th, '06, 04:27
Posts: 571
Location: SULTAN WASHINGTON USA
mcbob wrote:
Sounds as if the ring is a Dykes ring if it is of an " L " shape Rick
We still need better pics of the transfer ports so rip her down again young fella

Mc Bob. :whistle:


I have more pics Bob, I loaded those pics while on the road and will reload more soon in better size.. just got home :tehe:

Hulk, We might be able to talk wayne into that.. At one time Wayne was a race saw builder too so if we bugs him
enough who knows what could happen o:)

From all the posts I have read on here and racesawz about the 10Q this could
be the only one to get a copy from in existence :shock: :shock: :shock:

_________________
Looked good Rick but that bar is overkill ....Mc Bob

Thanks Bob, From now on just call me,, "KING OF OVERKILL"
________GO BIG OR GO HOME woo hoo________
http://www.youtube.com/user/mrbigsaw


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Aug 10th, '09, 06:30 
Offline
Junior Member

Joined: May 4th, '09, 09:34
Posts: 10
If you'll able to rebuilt some of these special cylinder/piston/head let me know, I'm interested in having one or two!!!
If not I'll try to modify an original 090....
Thanks


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Sep 11th, '09, 22:16 
Offline
MR. BIGSAW
User avatar

Joined: Sep 16th, '06, 04:27
Posts: 571
Location: SULTAN WASHINGTON USA
mcbob wrote:
Sounds as if the ring is a Dykes ring if it is of an " L " shape Rick
We still need better pics of the transfer ports so rip her down again young fella

Mc Bob. :whistle:


soory it took a while Bob :whistle: had a case of bugs in my megabites

here ya go

Image


Image

Image

_________________
Looked good Rick but that bar is overkill ....Mc Bob

Thanks Bob, From now on just call me,, "KING OF OVERKILL"
________GO BIG OR GO HOME woo hoo________
http://www.youtube.com/user/mrbigsaw


Top
 Profile  
 
 Post subject: Re: Need info on 10 cube Stihl 090 Barrel and piston
PostPosted: Sep 12th, '09, 05:25 
Offline
Collector Forum's Finest

Joined: Nov 13th, '08, 11:05
Posts: 560
Location: jonesboro louisiana
Country: united states
does it look like it has a stock carb on that thing. from the looks of the porting work ( in my limited knowledge ) that thing looks like it was set up to need a bigger than stock huff of fuel to run with out leaning out ,


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 49 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 34 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Template made by DEVPPL