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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Sun May 09, 2021 5:22 am Post subject: |
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I feel like these motors benefit from longish runners, and that shorty runners with ITBs will hurt drivability.
But, as some may point out, WTH do I know?
Looks like a fun build. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Wed May 12, 2021 6:48 pm Post subject: |
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3dprinted velocitystacks and adapters for zzr600 carbs |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Fri May 14, 2021 5:18 pm Post subject: |
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cant get bike carbs to run good, rpms dont go back to idle after pressing gas, ive checked for air leaks with brake cleaner and cable is good, any idea what could cause this? |
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safe
Joined: 18 Mar 2017 Posts: 583 Location: Sweden
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Posted: Fri May 14, 2021 5:45 pm Post subject: |
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Vacuum leaks
Idle screws to far out
Throttle plates not not closing enough, there is an adjustable stop I guess. The plates should not close completely just shy of touching the bore, otherwise there will be wear on the bore.
Have you synchronised them? its sort of a bitch to get all the throttle plates and idle screws the same and get them to draw the same amount of air. You will need a set of 4 vacuum gauges for this or an old school "thing" you put in the bell mouth. https://www.amazon.com/s?k=carburator+balance&ref=nb_sb_noss
Look up a workshop manual for the bike, it will have a section on balancing the carbs. _________________ /Magnus, Stockholm Sweden
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Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Tue May 18, 2021 5:02 am Post subject: |
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Cleaned carbs today |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Fri Jul 09, 2021 11:44 pm Post subject: |
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Ive had lack of motivation working on this car because things havent worked out.....
Im preparing to 3dscan the car once my adapter cables arrive from china and start working on the bodykit. |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Sat Jul 10, 2021 7:14 pm Post subject: |
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Flares are going to look something like this, heavily inspired by prod d |
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morghen
Joined: 21 Jan 2005 Posts: 8868 Location: Romania
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Thu Jul 22, 2021 3:02 am Post subject: |
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Dont be too harsh on my fusion 360 stuff, ive learned everything by myself so its kinda bad. This is my itb setup for some gsxr itbs, including trumpets, adapters and baseplate, still working on Plenum
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sun Jul 25, 2021 12:03 am Post subject: |
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Awesome! _________________ 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 |
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jacobroufa
Joined: 18 Nov 2016 Posts: 529 Location: Belvidere, IL
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Posted: Sun Jul 25, 2021 3:36 am Post subject: |
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Juho wrote: |
Flares are going to look something like this, heavily inspired by prod d |
This is sweet. D-prod are very mild flares (compared to GTR) and this looks like a very elegant extension/evolution of that idea. What is your plan to take it from design to reality? I would be really curious to see a rendering of that lip that extends forward of the front flare on a 924, if that's possible. _________________ 1980 Porsche 931
1981 Porsche 924 Weissach |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Mon Aug 02, 2021 4:02 am Post subject: |
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3dscanned today, got only half of the car because it started raining and the quality is pretty bad cause i scanned from pretty far away, but i can still use this to start making the flares |
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morghen
Joined: 21 Jan 2005 Posts: 8868 Location: Romania
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Posted: Mon Aug 02, 2021 7:10 am Post subject: |
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First, wow, technology has come a lomg way since i was a kid in the late 80s and 90s, second, your 924s rear is very low _________________ https://www.the924.com |
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Juho
Joined: 03 Oct 2018 Posts: 377 Location: Finland
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Posted: Mon Aug 02, 2021 7:13 am Post subject: |
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Yeah haha, i actually used a xbox 360 kinect to scan which i got for free , the scan quality would be way better if i held it closer to car.
https://www.youtube.com/watch?v=-cdE4C-wvK0 |
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