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 Janbros' 2-stroke excel for ports, heads and pipes

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crigar

crigar


Nombre de messages : 2248
Age : 67
Localisation : Ruoms 07 Ardèche
Date d'inscription : 14/02/2013

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeSam 8 Oct 2022 - 8:49

Non les 2 liens ne fonctionnent plus.
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeSam 8 Oct 2022 - 11:30

sorry, hosting site dissapeared and fotgot to change links here. new ones are in first post
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeLun 24 Oct 2022 - 20:19

due to a new post from Frits : [Vous devez être inscrit et connecté pour voir ce lien]
new donload in first post


I made a small correction to the calculation of the target Bd and transfer STA to get the correct target-value spot-on again with the new BMEP of the RSA
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2T4T




Nombre de messages : 5
Localisation : Essonne
Date d'inscription : 17/01/2010

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeLun 24 Oct 2022 - 21:42

[Vous devez être inscrit et connecté pour voir ce lien]
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 27 Oct 2022 - 20:58

another small error reported, which caused the exh port width to be a little too low.
corrected link in first post
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eerikj




Nombre de messages : 1
Localisation : Finland
Date d'inscription : 04/01/2023

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 4 Jan 2023 - 22:52

Hello, the second download link is not working? could you fix it.
Thanks
Regards Eerik
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 5 Jan 2023 - 12:09

should be fixed now
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 6 Avr 2023 - 15:11

JanBros a écrit:
should be fixed now

can i use this for my single exhaust port 50-80 cc motors? i am mainly interested in designing an expansion chamber and how will it compare to blairs, torqsoft and the simple fos one stage pipe?
cheers
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 6 Avr 2023 - 22:58

yes, read the manual
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeLun 10 Avr 2023 - 13:26

JanBros a écrit:
yes, read the manual

im reading the manual and straight away i cannot enter any data. only in the blank sheet but it doesnt go into another sheet. i get an error saying its protected. i have enabled editing.
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMar 11 Avr 2023 - 0:46

you will have to be more specific than that, I just downloaded and tested it, and everything works.
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Frits Overmars

Frits Overmars


Nombre de messages : 2637
Age : 76
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMar 11 Avr 2023 - 11:57

JanBros a écrit:
you will have to be more specific than that, I just downloaded and tested it, and everything works.
Jan, I do not intend to pass judgment on where the problem lies. But this reminds me of a similar situation I once experienced.
A user of my software reported a malfunction that I could not reproduce until I tried it on someone else's computer whose settings were different from the settings on the computer on which I had developed and tested the software.
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMar 11 Avr 2023 - 15:18

JanBros a écrit:
you will have to be more specific than that, I just downloaded and tested it, and everything works.

jan bros can you tell me exactly in idiot proof steps how to enter data so it appears on all sheets please? i know youve gone to a lot of trouble inserting all the macros and formula etc so one tiny little step would be much appreciated.

lets say i wanted to enter my cc 50cc. can you tell me where to enter it please. exactly whjich sheet and what should happen to it? thanks

Edit, and now for some strange reason i can input my data into the green squares. ive done nothing at all ive just left it open on my pc for 2 days. maybe it just needed time to cool down or something.....
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMar 11 Avr 2023 - 23:14

did you save it on a "trusted location" ? if not, google "excel trusted location"
what excel version are you using ?

otherwise, try this, it's a stand alone of the FOS-pioe page
[Vous devez être inscrit et connecté pour voir ce lien]

and for those intersted, a stand alone of the HEAD-page :
[Vous devez être inscrit et connecté pour voir ce lien]
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMar 18 Juil 2023 - 23:25

i am struggling. if my port width is 25mm i enter half of that? but then on the diagram of flow it looks too small/ also i cannot enter cylinder height deck height gasket thickness to give me correct readings on the exhaust new page. it comes out wrong ie deck height 0.3mm instead of 0.7. a.nd base gasket 2mm. but its 1mm
i have put the compression height in as you want it. not from centre of pin but top of hole to top of piston.

i am entering numbers into the new exhaust. should i be entering it on the old page?



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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 19 Juil 2023 - 0:18

aljaxon a écrit:
i am struggling. if my port width is 25mm i enter half of that? but then on the diagram of flow it looks too small/ also i cannot enter cylinder height deck height  gasket thickness to give me  correct readings on the exhaust new page. it comes out wrong ie deck height 0.3mm instead of 0.7. a.nd base gasket 2mm. but its 1mm
i have put the compression height in as you want it. not from centre of pin but top of hole to top of piston.

i am entering numbers into the new  exhaust. should i be entering it on the old page?
you take a portmap and you enter the width of the port you measure as is. ONLY for the assymetrical ports, you enter the values from the "centerline" (of your own choice, it does not have to be the center) through the port to the in or outside of the port.

a lot of times I have doubted the whole cylinder height/spacer/.... thing, so I re-checked it and it appears to be correct. and yet I still doubt it. maybe you have found something that isn't correct. I haven't used it much, other than for experimenting when I created it. you can also keep it simple and enter the same .
off course this all only works if you enter your data "as your engine is before tuning" on the "old pages" , and than make the changes on the "new" pages.
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 19 Juil 2023 - 8:26

i will have another look this evening.
on exhaust new page where do the values come from that fill the top left boxes? engine data?
they differ compared to my input

if i enter a totally wrong cylinder height  on data page i can get deck height correct.
my port datas are wrong. i casn alter old they are green but new is yellow.  and the port map picture for new the exhaust at height 0 is already at 5mm above deck height.
i might try input data for old instead of new.

old seems to be behaving
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 19 Juil 2023 - 10:03

aljaxon a écrit:

jan bros can you tell me exactly in idiot proof steps how to enter data so it appears on all sheets please? i know youve gone to a lot of trouble inserting all the macros and formula etc so one tiny little step would be much appreciated.

lets say i wanted to enter my cc 50cc. can you tell me where to enter it please. exactly whjich sheet and what should happen to it? thanks


first you fill in all the green cell's on the data page.
than you make a portmap of your cylinder, and fill all the nescecary green cell's on the old pages (only the appropriate for your engine, if you for example don't have aux exh ports, leave everything blank for them). after this, you do not change anything on everything "old".
than you create your new "tuning" on the new pages. or you start from scratch, or you copy all data from old to new (see the manual how, as there is a difference between dark and light green cell's) and change the numbers .

are you sure you haven't changed yellow cell's (by accident) ? maybe download it again so you know everything is ok.
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 19 Juil 2023 - 15:24

no it wouldnt let me change the yellow cells.
i will start again. im gonna do another portmap using graph paper so as to determine the port widths easier om every mm line.
thanks for your help so far.
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeMer 19 Juil 2023 - 22:51

ok ive managed to fill in the old data and port map and i can see my exhaust port need some work. the safe roof profile is wrong and blowdown is wrong.[Vous devez être inscrit et connecté pour voir cette image]

however i have to bring the exhaust up to 200 degrees to get enough blowdown.

i rode this motor on monday and it screamed to over 10000rpm
and really started pulling from around 7000rpm. just when it should be running out of breath.
the pipe has a tuned length for 11000rpm  iirc  and i wonder if that is helping it breathe.

the first motor identical to this except 176 124 is also a screamer and revs to 12000 on the road with peak power at 9250 ish yet the blowdown suggests it runs out of breath at 3800.
so what is happening. have i got lots of power to unleash if i adjust my exhaust port?
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 20 Juil 2023 - 9:12

you have left the BMEP at the same level as the Aprilia RSA125 and are aiming for 26HP. obvious it's running out of breath, your goal is way too high.


Dernière édition par JanBros le Jeu 20 Juil 2023 - 18:56, édité 1 fois
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 20 Juil 2023 - 17:32

hahaha. i didnt spot that

ok on old exhaust i set bmep to 8 which gives 13bhp.
the first project motor (176 124)  was dyno'd at 10.8 bhp at around 9250 rpm so i think  this should be good for 2 more hp with more aggressive porting
so can i deduce that my exhaust port is ok but my transfers need more area?

[Vous devez être inscrit et connecté pour voir cette image]
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Adco

Adco


Nombre de messages : 6453
Localisation : Limoges
Date d'inscription : 19/02/2016

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 20 Juil 2023 - 18:07

N’y voyez pas d’offense, je suis d’humeur blagueuse aujourd’hui…
Est-ce qu’il y a le même en rayon pour les 4tps ?
Une colonne jaune, une colonne verte..
On remplit consciencieusement le jaune: nombre de cylindres, de soupapes, alésage x course…
Puis le vert.
On rentre:
La puissance souhaitée.
Le régime 
Le taux de compression 
La taille des soupapes 
Et il nous dessine les arbres à cames avec  la levée, le diamètre des conduits et la raideur des ressorts !
….et si on obtient trois centimètres à la levée des soupapes, c’est qu’on a été un peu trop optimiste.
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JanBros




Nombre de messages : 362
Localisation : Belgique
Date d'inscription : 05/12/2011

Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeJeu 20 Juil 2023 - 18:56

aljaxon a écrit:

so can i deduce that my exhaust port is ok but my transfers need more area?

[Vous devez être inscrit et connecté pour voir cette image]

yes, much more !
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aljaxon

aljaxon


Nombre de messages : 68
Age : 97
Localisation : United Kingdom
Date d'inscription : 16/11/2022

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MessageSujet: Re: Janbros' 2-stroke excel for ports, heads and pipes   Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Icon_minitimeVen 21 Juil 2023 - 0:21

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Janbros' 2-stroke excel for ports, heads and pipes - Page 2 Empty
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