Carb Questions, yes - I searched first... Options

[rhodyguy]

You need the little dished washers/caps.

[sdoolin]

You need the little dished washers/caps.

Yep, makes sense. I will search for them...

[sdoolin]

I have reached out to Blackline Racing to see if the washers for the mixture needles are available from them. Another question, in the pic below:



What appears to be a vacuum port is broken off in the body of the carb (non-broken piece on bench below). I'm showing my ignorance with these carbs, but how necessary is that fitting? It appears to simply stub out in the body of the carb, I won't be taking any vacuum signals from these carbs so I would plug it anyway? This is part #49 on the DRLA exploded diagram in the Dellorto Superperformance book, described as the pressure fitting (or something similarly mis-translated from Italian).

I'd like to remove the broken bit and make it right, but I know it'll be tricky getting it out. Will need thread/screw reverser, patience and luck...

[rhodyguy]

If you can, plug it in a reversible fashion. Examine the IAMS. If they are grooved or bent get new ones. The little o-rings are cheap. Get 4, or 8, when you order the caps.

[sdoolin]

Thanks rhodyguy, I understand "plug it in a reversible fashion", the rest I am sorry to say I no comprendo...

[rhodyguy]

Sorry. Idle Air Mixture Screw. They only require a light touch when seating them at the initial baseline setting and later when you are trying to achieve best lean idle. As for extra o-rings, they're cheap and it's easier than ordering out more if you have a problem or loose one.

[sdoolin]

Ah, si comprendo now. Light touch is all that is required all of the mixture screws are in good condition. I use a little grease on the threads to keep them moving easily.

[sdoolin]

Another question - I swore that the Dellorto Superperformace book had a specification for throttle plate baseline setting (throttle plate to throat clearance) at idle position? This can be measured with a feeler gauge, set on both carbs with idle adjust screws to get the thing running, then idle fine tuned through standard process (unisync, etc).

I have read the entire book for the third/fourth time but can't find that spec any longer?

[rhodyguy]

3 thousands. P.3 if you have the dellorto superformance book by Tomlinson.

[sdoolin]

3 thousands. P.3 if you have the dellorto superformance book by Tomlinson.

Yes, using the Tomlinson book. Page 3 it is, thanks as always..

[VaccaRabite]

That said, I'm seriously considering going to Chris' cable linkage from Tangerine Racing. The CB Performance hex-bar is getting a little loose . . .

Hope this helps!

His cable link is the BOMB.
Its fantastic. I hated selling mine when i went to Micorsquirt. Its better in EVERY way to a hex bar.

Zach

[anderssj]

Hope these help!

Page 1:

[anderssj]

Page 2:

[sdoolin]

Very helpful, thanks for uploading. Much easier on these old eyes than the exploded parts diagram in the Tomlinson book as it is in some micro-font (so lawyers can read it).

I need part #60 four times. Aircooled.net does not have, Blackline Racing doesn't return calls or emails (which is strange for them), so I guess I will have to make 4 of these itty bitty washers.

Very strange that neither of the 2 sets of 40s that I purchased had these washers...

Here's my set-up so far. I may move the linkage to the rear to get more room for a throttle cable bracket.

[anderssj]

Give these guys a try--they were a big help when doing a "light rebuild" (gaskets, etc.) on my DRLA40s a few years back:

http://www.carburetion.com/Dellorto/DellortoDRLAParts.asp

CARBS UNLIMITED INC.
727 22nd st NE
Auburn Wa 98002

Questions and Information (253)833-4105
Order Line 1-800-994-CARB (2272)

Have you looked at CB Performance? I know their shipping is EXPENSIVE, but sometimes they're the only game in town for certain Dell parts.

[anderssj]

Very helpful, thanks for uploading. Much easier on these old eyes than the exploded parts diagram in the Tomlinson book as it is in some micro-font (so lawyers can read it).

I need part #60 four times. Aircooled.net does not have, Blackline Racing doesn't return calls or emails (which is strange for them), so I guess I will have to make 4 of these itty bitty washers.

Very strange that neither of the 2 sets of 40s that I purchased had these washers...

Here's my set-up so far. I may move the linkage to the rear to get more room for a throttle cable bracket.

Another drawing/install guide from CB Performance (with my notes from about 30 years ago (IMG:style_emoticons/default/blink.gif) )



On mine, the throttle arms point down and out-board, pull arm is below the cross-bar per the drawing. I think I found that easier for adjusting the linkages when balancing carbs, etc.

[stugray]

http://www.dellortoshop.com/index.html

[CCE]

Building a 2056 and almost complete with it except for carb rebuilding and a few other details. Going with dual Dell 40's.

My gasket kit came with what I will call "spacers" that are used between cylinder head and FI runners. Do I (should I) use these when mounting my carb manifolds? I did not use them on a bus engine I built years and years ago and it ran well - for a very long time so I am tempted to go without them, but thought I would ask.

If there is significant good reason to use them, where do I find the seemingly very (very) thin gaskets that go on each side of them (head side & manifold side)? I ordered intake manifolds from Pelican but them seem a bit thick (I can use them if I choose not to use the "spacers").

Also have a few questions about accelerator cable and carb base plates. Can I re-use the cable that is in the car (it was injected and ran well)? If yes, is there an "off the shelf" bracket to mount it on the engine such that it operates the cross bar linkage? And finally (for now) does the cross bar linkage go on the front or back of the carbs (depending on base plate orientation)?

Pics of your carb'ed set-up might really help me out here so if you got 'em, please feel free to use 'em.

Lets bring back very old posts on carb questions.

I am istalling a vintage speed linkage, but apparently is not completely designed for a mid engine type IV motor.
Need some solutions on the throttle cable support. You will see my old cable holder in the center, and also see my weber update kit, CB Performance distributor, black box, and 3,5” velocity stacks.

[Literati914]

Lets bring back very old posts on carb questions.

I am istalling a vintage speed linkage, but apparently is not completely designed for a mid engine type IV motor.
Need some solutions on the throttle cable support. You will see my old cable holder in the center, and also see my weber update kit, CB Performance distributor, black box, and 3,5” velocity stacks.

I like everything you've done - do you have a thread started on your car/updates?

Regarding the cable situation, is there any chance of using what you have already.. but flip it around where it is, or run it just over to the other side of case bolts?
(IMG:style_emoticons/default/popcorn[1].gif)