DCOE Installation FAQ

[Robberrick]

 

Great article on the installation of 2 x 40 DCOE carbs

I race a 2002 but updated the engine to an S14 so solved all problems of timing, fuel and air controls.

 

However I have just purchased a 73 2002 roundie which was an unfinished project.

The beast takes time to start and does not run at all well.

 

The previous owner installed an overhauled M10 engine from an E21  and added 2 x 40DCOE/32 carbs from an Alfa GTV 1750cc.

He blanked off the mechanical fuel pump and fitted an electric format.

 

Can anyone tell me what the correct jetting should be for these carbs on this motor?

 

Richard

Sunshine Coast

Australia

 

[M3M3]

correct jets are going to be the ones you tune it to run best with.  each engine is different.  use some of the guides as a starting point, then change them to get it running correctly (using your afr gauge).

[Happy Face]

The answer to this question might be buried somewhere in the many postings already here but I didn't see it.  What about the throttle cable itself coming from the accelerator pedal.  I've got the overhead webers now that haver the mechanical rod which links to the side of the overhead carb (32/36), but I understand I'll need to replace all of that with a cable pull system to move the throttle on the dual webers (and linkage).  Are there some tips or guidance to set that part up?

[AceAndrew]

On 7/26/2019 at 9:53 AM, VeronaO2 said:

The answer to this question might be buried somewhere in the many postings already here but I didn't see it.  What about the throttle cable itself coming from the accelerator pedal.  I've got the overhead webers now that haver the mechanical rod which links to the side of the overhead carb (32/36), but I understand I'll need to replace all of that with a cable pull system to move the throttle on the dual webers (and linkage).  Are there some tips or guidance to set that part up?

 

I use a Lokar cable to connect a good rod linkage to the pedal box.  It needs support arms at the pedal box and up at the carb for the cable sheath.

 

IMG-2156 by Adams Autosport, on Flickr

[Happy Face]

Andrew, that’s a really clean looking setup. Is that an Ireland intake manifold, linkage kit too?

[AceAndrew]

Yes, it is an Ireland manifold.  No, it is not a IE/Redline linkage.

 

Here is another recent client build..... IE manifold (port matched), Adams Fuel Rail and Cold Start Block Off's, 40's, Longer velocity stacks, custom filters, Pierce linkage, etc.  It's easy to get carried away, haha.  

 

 

[man_mark_7]

I'm just about to slap on my DCOE's. I have the IE water bypass to go from the back of the water pump to one side of the heater core. I just noticed there is a port on the back end of the block that used to route to the old intake manifold. Is it OK to just plug this port? I don't want to create any hot-spots on the block!

 

thx

Mark

[man_mark_7]

16 hours ago, man_mark_7 said:

I'm just about to slap on my DCOE's. I have the IE water bypass to go from the back of the water pump to one side of the heater core. I just noticed there is a port on the back end of the block that used to route to the old intake manifold. Is it OK to just plug this port? I don't want to create any hot-spots on the block!

 

thx

Mark

 

I got an answer via the main thread here vs. in this FAQ. It's OK to cap this port. Original use is for the water choke on down draft carbs. 

 

[norrinradd]

My 2 cents: Do the duals ! Fun stuff ! Now where is that vacuum leak ?

[man_mark_7]

Here's how it looks today....

 

[Pdxguy]

On 8/22/2021 at 8:53 AM, norrinradd said:

Norrinradd and Man_Mark_7: How effective has the crankcase breather filter been? Messy?

Thanks,

Dennis

 

On 8/22/2021 at 8:53 AM, norrinradd said:

 

On 8/22/2021 at 5:04 PM, man_mark_7 said:

Here's how it looks today....

 

 

[norrinradd]

Not much of a mess. Occasionally, I wipe a drop off of it. I have also noticed a drop or two below on the intake manifold. not consistently