Dual Dellorto DHLA 40 Carbs, Racing carbs |
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Dual Dellorto DHLA 40 Carbs, Racing carbs |
flmont |
Mar 13 2019, 10:19 PM
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#1
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Senior Member Group: Members Posts: 879 Joined: 21-October 08 From: Tucson,Az Member No.: 9,676 Region Association: Southwest Region |
would these carbs be good for a type 4 2.0 build bigger crank and cam set up ,they are asking for 350.00 OBO,..Thanks
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wes |
Mar 14 2019, 12:25 AM
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#2
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wes Group: Members Posts: 1,588 Joined: 8-December 07 From: Ukiah Ca Member No.: 8,436 Region Association: Northern California |
I have 40 Dellorto’s on my 2056 and think they’re a perfect set up!
That’s I believe a good deal if you’re talking about $350 for both. I paid more and had them rebuilt. |
johnhora |
Mar 14 2019, 09:11 AM
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#3
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Senior Member Group: Members Posts: 864 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
questions to ask...
what condition are they in... do they need a rebuild... are all parts there...etc |
flmont |
Mar 14 2019, 09:22 AM
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#4
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Senior Member Group: Members Posts: 879 Joined: 21-October 08 From: Tucson,Az Member No.: 9,676 Region Association: Southwest Region |
I dont know yet but I will ask them,..If they need rebuilt whwere is the ( Place ) to send them. Thanks Frank
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flmont |
Mar 14 2019, 09:23 AM
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#5
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Senior Member Group: Members Posts: 879 Joined: 21-October 08 From: Tucson,Az Member No.: 9,676 Region Association: Southwest Region |
Wes, Whats the largest displacement can you go with those carbs. ?? TIA,..Frank
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GregAmy |
Mar 14 2019, 10:13 AM
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#6
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Advanced Member Group: Members Posts: 2,262 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
DHLA or DRLA? DHLA are side drafts...
If we're talking Rs, then the biggest venturi for the 40 DRLA is 34mm. However, CB Performance offers a kit to convert the DRLA to 36mm venturis and changing the design of the discharge tubes: https://www.cbperformance.com/product-p/7345.htm |
yeahmag |
Mar 14 2019, 11:05 AM
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#7
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Advanced Member Group: Members Posts: 2,420 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
You can get 36mm venturi's from folks other than CB.
http://vwparts.aircooled.net/Dellorto-DRLA...-venturi-36.htm I did have to trim about 1mm off of them for my carbs. Apparently there are quality control issues... |
GregAmy |
Mar 14 2019, 11:13 AM
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#8
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Advanced Member Group: Members Posts: 2,262 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
That's good to know.
I converted the 40s on my racer to the CB Performance kit and they may also have some quality issues. Primarily I don't think the discharge tube is properly seating. Contacted their technical support and they never got back to me so I stopped trying. I ran it like that last Fall a couple of times and it seems to work fine, AFRs come in OK after re-jetting, but I'm getting some inconsistencies in smoothness and light backfiring on throttle off. Gonna have Chris Foley go through them and see what he thinks. |
flmont |
Mar 14 2019, 11:21 AM
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#9
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Senior Member Group: Members Posts: 879 Joined: 21-October 08 From: Tucson,Az Member No.: 9,676 Region Association: Southwest Region |
Thanks GregAmy,.. DRLA the pic shows ,this is also a build for general street use also,.??
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yeahmag |
Mar 14 2019, 11:26 AM
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#10
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Advanced Member Group: Members Posts: 2,420 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
The 40 DRLA will suit you just fine. Make sure you grab the CB Performance book on them and double check that the jets and floats are in the ballpark. I have TONS of parts for them, so let me know if you need anything.
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SirAndy |
Mar 14 2019, 11:43 AM
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#11
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Resident German Group: Admin Posts: 41,580 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
You can get 36mm venturi's from folks other than CB. 36 seems too big for a 2.0L engine. I went down to 32 venturis on my 2056 to get rid of a annoying off idle flat spot. (IMG:style_emoticons/default/popcorn[1].gif) |
yeahmag |
Mar 14 2019, 12:28 PM
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#12
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Advanced Member Group: Members Posts: 2,420 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
You can get 36mm venturi's from folks other than CB. 36 seems too big for a 2.0L engine. I went down to 32 venturis on my 2056 to get rid of a annoying off idle flat spot. (IMG:style_emoticons/default/popcorn[1].gif) Mine is a unique case. I run the car above 7K RPM for autocross. I don't have any flat spots, but everything is tweaked to the 9's. |
GregAmy |
Mar 14 2019, 02:02 PM
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#13
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Advanced Member Group: Members Posts: 2,262 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
Mine is a unique case. Mine too. Race only, cams/compression "warm" build by Foley. The "Dellorto Bible" is a (poorly-edited) book, filled with excellent info about these carbs. I recall it recommends 34s, along with some baseline jetting/air correction info. Get a copy of it. https://www.cbperformance.com/product-p/0101.htm Street car is all D-Jet, all the time... |
rhodyguy |
Mar 14 2019, 04:31 PM
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#14
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,042 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
I found the Del book from CB lacking. Severely. Nothing at all like the Weber book.
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rhodyguy |
Mar 14 2019, 04:48 PM
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#15
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,042 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
If you want to farm the carb work out, try Blackline Racing in Murray Utah.
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flmont |
Mar 14 2019, 05:14 PM
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#16
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Senior Member Group: Members Posts: 879 Joined: 21-October 08 From: Tucson,Az Member No.: 9,676 Region Association: Southwest Region |
Thanks Guys,..which Carbs are the better ones,...weber or dellor
tos |
GregAmy |
Mar 14 2019, 07:07 PM
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#17
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Advanced Member Group: Members Posts: 2,262 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
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1adam12 |
Mar 14 2019, 07:16 PM
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#18
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Member Group: Members Posts: 209 Joined: 25-May 17 From: Chino Hills, CA Member No.: 21,132 Region Association: Southern California |
Visit Eurocarb for your genuine Dellorto parts. Someoneo on the forum here suggested it and I've made a few purchases through them to rebuild my DRLA 40's. There in England but ship fast and cheap to the U.S. !!!!!
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yeahmag |
Mar 15 2019, 11:22 AM
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#19
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Advanced Member Group: Members Posts: 2,420 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
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MarkV |
Mar 15 2019, 01:28 PM
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#20
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Fear the Jack Stands Group: Members Posts: 1,493 Joined: 15-January 03 From: Sunny Tucson, AZ Member No.: 154 Region Association: None |
I bought all of my rebuild parts and vents from this guy:
https://www.ebay.com/str/ALFA1750S-CARBURET...=p2047675.l2563 He is in Italy but he ships pretty fast. He recommended 34mm vents for my 2056 which is what I am running. My carbs came with 28's and the 34's made a huge difference. |
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