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Weber installation question

 
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snakoil  



Joined: 09 Feb 2010
Posts: 323
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?
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1979 924 NA
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 699
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.
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Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
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snakoil  



Joined: 09 Feb 2010
Posts: 323
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.


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MikeJinCO  



Joined: 08 Jun 2010
Posts: 699
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.
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Mike
Poco a Poco, '80 future track car
'77 924
cricketdesigns.com
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snakoil  



Joined: 09 Feb 2010
Posts: 323
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.

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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
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