| View previous topic :: View next topic |
| Author |
Message |
Mike9311
Joined: 14 Dec 2004
Posts: 1678
Location: Chicago-ish
|
 Posted: Mon Apr 04, 2022 1:36 am Post subject: |
 |
|
| Juho wrote: | | Reverse engineering intake flange was harder than i remember, this is going to take a lot of revisions |
Right there with you especially when coming back to project you stopped for a while. You have to try and figure out what you were thinking back then. Its better to just follow through to the end rather than come back to a project unless you have better skills and/or tools. All my reverse engineering projects have revisions like crazy. Then people see them and think I just popped it out quickly. Ah no, some of them took me years I tell them. Turbo mount was one of those.
The best thing I have learned so far is studying my own work flow process and improving on that based on how things went in the past. Like looking back at a picture and realizing you are in a project for 7+ years and I am still working on it.
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
|
| Back to top |
|
 |
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Mon Apr 04, 2022 2:16 am Post subject: |
|
|
Got my flange to match head perfectly now. I scrapped the one i did before and started working on a new one. took alot of tries, printing fitting and modyifying, now i can move to other parts.
Velocity stack adapter......
Still need to model curved velocity stack, im planning to do short manifold but long stacks |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Mon Apr 04, 2022 8:24 pm Post subject: |
|
|
Very shorty bois now because less moment on the flange, have to make the stacks LONG and CURVED to clear hood, i think im going to go with these |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Mon Apr 04, 2022 9:10 pm Post subject: |
|
|
Basic idea of the veloctity stack, someone tell me its shit so i have modify it.
Once im happy with the fitment i got to cfd it for silly mistakes |
|
| Back to top |
|
|
safe
Joined: 18 Mar 2017
Posts: 586
Location: Sweden
|
| Posted: Mon Apr 04, 2022 9:17 pm Post subject: |
|
|
A full radius gives a better flow. (like a solid donut on the end of the tube)
_________________
/Magnus, Stockholm Sweden
=======================
Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Mon Apr 04, 2022 9:28 pm Post subject: |
|
|
| safe wrote: | | A full radius gives a better flow. (like a solid donut on the end of the tube) |
ty for the tip, went with this because easier to print
Changed it to donut design now
 |
|
| Back to top |
|
|
Cedric
Joined: 27 Aug 2004
Posts: 2608
Location: Sweden
|
| Posted: Tue Apr 05, 2022 1:13 am Post subject: |
|
|
You can design in some material under the full radii and it won't need any extra support, tried it on my flow bench stuff.
_________________
1980 924 Turbo
www.instagram.com/garagecedric/ |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Tue Apr 12, 2022 2:12 am Post subject: |
|
|
Loom stuff came in |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Tue Oct 31, 2023 5:35 pm Post subject: |
|
|
havent had any motivation for car for longtime but started now getting back to it
did very oversimplified cfd analysis on doing bends vs no bends on intake adapter
i studied preassure differences on different flow speeds and bend one seems to be bit better
also velocity stack adapter to cbrr itbs, need to still adjust tolerances but design is good enogh atm
 |
|
| Back to top |
|
|
Sweezer
Joined: 24 Oct 2023
Posts: 1
Location: Ohio
|
| Posted: Sat Nov 04, 2023 6:35 pm Post subject: |
|
|
| Love your posts! Hang in there. |
|
| Back to top |
|
|
Juho
Joined: 03 Oct 2018
Posts: 377
Location: Finland
|
| Posted: Tue Nov 14, 2023 4:53 am Post subject: |
|
|
Ive been naive to think that the 48mm cbr itbs would be the correct size for the 924. but ive finally come to senses after reading some stuff and switched to the other itbs i had. 38mm gsxr itbs. Nice thing with these is you can separate them resulting in straight runners, meaning less losses on intake adapter.
going to do minor changes on flange and fillets but its pretty much finished
i started on working on plenum. this is not finished it all, havent done any cfds or anything just made a model i can start playing with. Problem is atm there is so many variables that i can change so i need to narrow them down before starting cfd work. Currently reading on stuff to make better plenum...
im probaly gonna soon take the extra step of scanning engine bay to make sure everything fit and make a dummy model of the itbs itself. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
924 FAQ (Technical)
