Quattrini M244 cowl??
Ginch
Tue, 19 Sep 2023 08:32:33 +0000
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
 
Ginch
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
Tue, 19 Sep 2023 08:32:33 +0000 quote
108 wrote:
Great it's in a good place!
Thanks! Now I can concentrate on my leaky tyres and rattly gear tube!
Jack221 wrote:
Did the 1/8 cruise smoothness change with the 2.5 turns?
Holding steady under 250f for 5 minutes or more, would suggest it's in the ballpark.
At the end of the cruise, opening the throttle 1mm more it should pull hard immediately, when everything is set correctly.
Just took it through town and out for a 50km ride, and for the 5 minutes or so I was in 60kmh traffic it was holding around 230-250f. Smoothness was ok, not noticeably different but I wasn't paying so much attention to that.
Not sure about the 1mm, I guess that's half way between 1/8 and 1/2? If I was in 3rd it would pull hard but would take a bit more from 50-60 in 4th.
Jack221
Tue, 19 Sep 2023 14:18:03 +0000
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
Tue, 19 Sep 2023 14:18:03 +0000 quote
Doesn't seem like any immediate issue with the 1/4. What I was meaning about the 1mm, is that after holding steady for a while it should still respond to throttle. If lean it will make a little more carb noise and pull after a while. If rich it will gurgle and do nothing much without more.
Ginch
Wed, 20 Sep 2023 21:13:05 +0000
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
 
Ginch
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
Wed, 20 Sep 2023 21:13:05 +0000 quote
It does feel like it pulls pretty cleanly once you crack that throttle now. Certainly you can tell the difference in that area between the X32 and the X13.
OP
108
Mon, 25 Sep 2023 07:15:22 +0000
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707

 
108
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707
Mon, 25 Sep 2023 07:15:22 +0000 quote
Some small updates, reed valve porting…

And some timing measurements taken. 1.3mm squish

Finally arrived around:

183 exhaust
129 transfer





Positive
Ginch
Mon, 25 Sep 2023 10:08:09 +0000
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
 
Ginch
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: Thu, 01 Dec 2011 00:47:42 +0000
Posts: 8375
Location: Victoria, Australia
Mon, 25 Sep 2023 10:08:09 +0000 quote
108 wrote:
Some small updates, reed valve porting…

And some timing measurements taken. 1.3mm squish

Finally arrived around:

183 exhaust
129 transfer
Nice! Watch out for small children falling down that hole...

Which crank are you using again?
Positive
OP
108
Mon, 25 Sep 2023 10:17:33 +0000
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707

 
108
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707
Mon, 25 Sep 2023 10:17:33 +0000 quote
Ginch wrote:
Nice! Watch out for small children falling down that hole...

Which crank are you using again?
Just a SIP rotary crank 60mm, 127mm rod.
Jack221
Mon, 25 Sep 2023 11:13:10 +0000
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
Mon, 25 Sep 2023 11:13:10 +0000 quote
What exhaust, reed block and carb is planned for that?
OP
108
Mon, 25 Sep 2023 12:03:50 +0000
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707

 
108
Molto Verboso
PX 200
Joined: Wed, 25 May 2016 16:14:28 +0000
Posts: 1707
Mon, 25 Sep 2023 12:03:50 +0000 quote
Jack221 wrote:
What exhaust, reed block and carb is planned for that?
SIP road 3.0, italkast double prism reeds and a PWK 30mm
Jack221
Mon, 25 Sep 2023 18:06:28 +0000
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
 
Jack221
Jet Eye Master
PX221 MHR, O tuned PX200, PX181 Quattrini and some motorbikes
Joined: Thu, 15 Jun 2017 05:16:54 +0000
Posts: 4109
Location: London UK
Mon, 25 Sep 2023 18:06:28 +0000 quote
108 wrote:
SIP road 3.0, italkast double prism reeds and a PWK 30mm
129/183/27 perfect for that set up. Lots of torque. 80mph WOT, if necessary.
Looking forward to hearing it running.
  DoubleGood Design  
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