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Hey guys, new to VW's, but have a lot of experience with LS Turbo cars.
I am on my first VW build, and looking at the Twin Empi D's (45's) for carbs. Reason is cost and the cool factor. I would like to hear from anyone with personal experience useing them with boost.
Motor is a 2110, 82mm counterweight crank, 90.5 pistons, forged 5.4 chevy J rods, CB #2242 cam, Panchito 61cc heads, 1.25 rockers. Bug is a full body under the lid.
Thoughts and opinions are appreciated.
Mark

Hey mark,, I see guys(slamba) are having fun just getting/jetting them 'right' N/A ,, only Olfog on here plays with Dells,,
so your gonna be 1st we like pic's

Yeah me being 1 of them. HAHA. I'LL get there. and when I do ,I'll be shipping this bug over an running long side JJ DABOSS. LOL.

Thanks guys,
I am going to re-install my old duel carbs without the Turbo when I start the engine for the first 30 minutes for the breakin. Then I will swap in the E Dellorto's with the turbo for the final install. I was just hoping to talk with someone who has done what I am doing.

Well. I'm doing the same thing you are Blown bug. I have tried blow through dells, and got some good results ,but I think until you no how to tune them N/A Properly its best to leave the turbo tuning alone as its a different way of jetting. The Turbo E tubes are needed ,and the mod rings. The sealed shafts not so much, rising rate fuel reg is needed. Rubber carb top gaskets are needed too. N/A fuel pressure at idle is 3psi max. I use 225 inlet needles, These have been a bit leaky to be fair ,but I think it was BOOSTED fuel pressure pushing the float down and making the float sink and stay sunk …., as the float can catch the edge of the float bowl which then floods the engine. Boost needs to get to the float bowl, there is a small float bowl vent built into the top of the carb top. I think its too small ,I have enlarged mine .My E tubes are not the same as the ones CB sells. Mine are tapered from the top were the air jet fits going thin at the bottom were the main jet is. With 4 holes were the main jet is and 1 hole at the top were the air jet is. No holes in the middle.

Garrick
Where did you buy the E tubes and other parts needed for the Enpi D's?

The rubber carb gaskets are from euro carb UK, but I think John at Air cooled. net has them. Same with the bigger inlet needle valves. The raising rate fuel pressure reg is a malppassi FPR 014 which is a fuel injection pump to carb version. Mod rings are CB. Real TURBO e TUBES are from euro carb UK too. The order form is easy to do on line. I placed an order half hour ago. My E TUBES are actually BASIC .2 TUBES with soldered up holes and thinned out at the bottom like some people do on the DHLA Carb.
Too be fair CB might have all the above mentioned parts.

I think TurboBaja was running Dell's. He has a pretty long thread. You can probably find some good info in there.

viewtopic.php?f=3&t=115346

The biggest problem I had with my Dells was with fuel leaking from the (sealed) shafts. Anything over 7 psi boost and they'd leak enough to make me concerned about a fire hazard. Other than that, to make one jet change on a set of dual carbs with boost hats got very old, very quickly. You'll always be dealing with some kind of compromise with the carbs, basically. My build took so long, I had people laughing at me for even running carbs and a silly distributor for years before it even ran. Looking back, I learned a lot from the carbs. Mostly that they belong on the shelf, or maybe on an oldschool NA build...eventually. Switching to EFI was by far the best thing I could have done. It really depends on what you're looking for. Blowing through carbs does work, and plenty of people have done it well. However, almost every one of those people have eventually gone EFI and never looked back. As much as I enjoy working on my engine, I really enjoy touching only a keyboard to make tuning changes. And anybody making real power with these engines will spend considerable time on their tune...or be building another engine soon .

Turbobaja is right about blow through dells, this will be the last attempt to get them right. That's why understanding how the different jets and e tubes work in N/A format 1st before fitting turbo hats is a good thing to do. I didn't have any fuel spray last time, but I did machine the shafts for O rings ,so that must have been a good thing to do. Thinking back it was the tune past 8psi that was proving difficult.

I run the old original 40 Dells. The only problem I have had it the left carb wants to clog in the idle circuit; the guy who sold them to me warned me of it so I don't feel bad, they work more than OK.

For what it is worth: if you are getting used EMPI Dells then it is my understanding that the first units that were sold had some problems which, I understand, got fixed so they are now OK... or so I have been told.

Lee

I've fitted my 36 vents so when I have the 33 mod rings fitted the 36 vent and 33 mod ring is sized correctly to each other. I have a feeling the 33 mod ring is too small and richens it up too much down low. I didn't experiment with these last time, Maybe they need opening up a bit to lesson the signal.

Thanks guys for the experienced feedback, I am going to consider everything thats been said before proceeding with the Dell's.

Check out:
http://rodneyadamsdesigns.com/

He is doing blowthru turbo using a single self-contain EFI throttle body that has the emu built in from Fitech and Holley. Also check out his vids with blowthru Holley 2 and 4 barrel cards. As I understand it the Holleys are much easier to set than dells and Webers in a turbo application.

wait a minute, it's not that the Holley's are easier , jetting is a PITA :roll:compared to dell or weber's ,,but the result's are way better