Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Weber installation question

 
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades
View previous topic :: View next topic  
Author Message
snakoil  



Joined: 09 Feb 2010
Posts: 327
Location: Canada

PostPosted: Thu Apr 12, 2018 11:33 pm    Post subject: Weber installation question Reply with quote

Hi Guys, I'm looking forward into converting to my DCO40's in May.
For the first time ever I took a good look at the setup I had bought years ago and realised it didn't came with any linkage kit.

What linkage are some of you using?

Any picture of your setups would be really appreciated to see how I could mount this.

Also for the fuel pump, can I simply replace the second pump with a 3-4PSI pump or I should do something else with the in-tank fuel pump?
_________________
1979 924 NA
Back to top
View user's profile Send private message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 704
Location: Maysville, Colorado

PostPosted: Thu Apr 19, 2018 12:53 am    Post subject: Reply with quote

MY '77 had only one pump and I just replaced it with a low pressure pump and Holley fuel pressure regulator. Plugging off the existing return line was a major issue, I finally found a cap (12mm I think) that I got from Vibrant performance thru Summit Racing.

For linkage my second hand Redline set had the pair of clips that connect between the throttle shafts and they work ok, tho I had to fabricate a small bracket that bolts to one carb(both would be better) to hold the throttle cable.

On my 45's that go on the track car they also have the center connection although I'll see a fellow who has been building Datsun race engines for years with Weber's or Mikuni's and I'll ask him which method is best when I see him which might be as late as early June. The center connection method I've got is also the least expensive.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
snakoil  



Joined: 09 Feb 2010
Posts: 327
Location: Canada

PostPosted: Wed May 02, 2018 11:31 pm    Post subject: Reply with quote

thanks for the info MikeJinCO, seems I do have those clips you are talking about. This shall be what I use for stage 1 and get it running.

Did you experienced any vapor lock with not using any return line?
I'm planning to get a holley 12-804 for the FPR and this one doesn't have a return line output.


_________________
1979 924 NA
Back to top
View user's profile Send private message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 704
Location: Maysville, Colorado

PostPosted: Thu May 03, 2018 7:35 am    Post subject: Reply with quote

Never a vapor lock problem with no return line. I had to fabricate a new throttle cable holder that bolts on to one of the carbs. It is a slotted hole similar to the original. I'll modify it this year to attach to the other carb also to make it more stable.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
snakoil  



Joined: 09 Feb 2010
Posts: 327
Location: Canada

PostPosted: Thu May 10, 2018 11:02 pm    Post subject: Reply with quote

I went to the auto parts store to find a plug for the return fuel line
I thought i was wise as I had found a 1/4 NPT femeale to female adapter and a plug for it.
While the male NPT screw into my oem fuel cable, the female adapter is not big enough to connect to my hard line and thus not working.
Thought id share the info to anyone looking into the weber upgrade.

_________________
1979 924 NA
Back to top
View user's profile Send private message
rhialto  



Joined: 09 Jul 2004
Posts: 23
Location: Netherlands

PostPosted: Fri May 11, 2018 7:29 am    Post subject: Reply with quote

Use on of these (I seem to remember the 16mm are for the return line) and than use an AN6 plug, which wil be readily available in your country I guess:
https://www.holley.com/search/?q=9894DB
Back to top
View user's profile Send private message
snakoil  



Joined: 09 Feb 2010
Posts: 327
Location: Canada

PostPosted: Wed Jun 06, 2018 11:31 pm    Post subject: Reply with quote

I ended up going to my local hydraulic shop as I wasn't sure of measurements.
Seems the thread on the 1979 924 is M14
They gave me a hollow nut with a ball bearing and this does the trick so far.
I ain't really nice looking in the engine bay so I might order that Holley 14mm to -6an converter.



The carbs are currently being rebuilt, will post picture once I get them back
_________________
1979 924 NA
Back to top
View user's profile Send private message
MikeJinCO  



Joined: 08 Jun 2010
Posts: 704
Location: Maysville, Colorado

PostPosted: Thu Jun 07, 2018 12:23 am    Post subject: Reply with quote

I looked up the Vibrant Performance catalog. They have many metric to other thread pieces. I don't recall if it was a 12 or 14 size, but I got a piece from them to convert it to an AN probably -6 thread and then just a cap for that thread. They are in Ontario so you should be able to get direct. Look under the adapters in the fluid delivery section, they have all sizes.
_________________
Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
Back to top
View user's profile Send private message Visit poster's website
procyon  



Joined: 09 Sep 2015
Posts: 53
Location: Peers Alberta Canada

PostPosted: Mon Jun 18, 2018 3:22 pm    Post subject: Reply with quote

These fuel lines seem to be 14mm. When I installed my EFI system I used 14mm to AN6 adapters for the return line.
_________________
1981 924 N/A (Now the parts car)
1980 924 N/A ( 5 bolt discs and better paint)
2007 Subaru Forester
2007 Toyota Camry
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades All times are GMT + 11 Hours
Page 1 of 1

 
Jump to:  
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 vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group