TheSamba.com :: View topic - Homemade Turbo 1600 Single Port recipe, DYNO'ED, NOW T3/T4!!

Thu Sep 01, 2011 8:26 pm

Cool! Good luck and have a good time at the races. Are you running a muffler or just straight thru from the Turbo?

Thu Sep 01, 2011 9:14 pm

Definitely need a video...

I would love to see it run....

Clonebug

Fri Sep 02, 2011 12:08 am

DarthWeber wrote: I bet you still miss your sidedraft Dellorto though.

Less icing with my dellorto, because of the very short manifold I imagine.
I 'll go back to DHLA next year. less weight and much compact!
I would to know what is the CFM of this carb, but don't find anything on the net...
Joel, may be the fact that the intake manifold is close to the exhaust can help?

Fri Sep 02, 2011 8:57 am

That's what we call "Accidental Engineering" With the manifold below the tin, it will be warmed by the exhaust heat....shouldn't be any icing problems....THANKS!

Fri Sep 02, 2011 12:38 pm

Koyote wrote: I would to know what is the CFM of this carb, but don't find anything on the net... I don't have the exact numbers for a DHLA but I did dig up some numbers for the DRLA's vs. IDF's. I would think these will be representative, if not exactly the same, for a DHLA side draft vs. a DRLA down draft.
48 DRLA = 388.5 CFM
45 DRLA = 329.3 CFM
44 IDF = 292.3 CFM
40 DRLA = 266.4 CFM
40 IDF = 212.8 CFM
36 DRLA = 205.8 CFM
The carbs were tested on a Superflow 110 flow bench @ 10" of water. This was taken from my old Small Car Specialties catalog and they probably got the chart from Claude's Buggies (known as CB Performance to you youngsters today!).

Mon Sep 05, 2011 1:44 am

DarthWeber wrote: Koyote wrote: I would to know what is the CFM of this carb, but don't find anything on the net... I don't have the exact numbers for a DHLA but I did dig up some numbers for the DRLA's vs. IDF's. I would think these will be representative, if not exactly the same, for a DHLA side draft vs. a DRLA down draft.
48 DRLA = 388.5 CFM
45 DRLA = 329.3 CFM
44 IDF = 292.3 CFM
40 DRLA = 266.4 CFM
40 IDF = 212.8 CFM
36 DRLA = 205.8 CFM
The carbs were tested on a Superflow 110 flow bench @ 10" of water. This was taken from my old Small Car Specialties catalog and they probably got the chart from Claude's Buggies (known as CB Performance to you youngsters today!).

Thanks !
so the DHLA is in the 266 CFM range. with 10'' of water I presume that is less CFM than 4barrel carbs, because they are flowed with less inches of water isn't it ?

Mon Sep 05, 2011 9:18 am

Koyote wrote: so the DHLA is in the 266 CFM range. with 10'' of water I presume that is less CFM than 4barrel carbs, because they are flowed with less inches of water isn't it ? Good question, and I'm not sure of the answer. Obviously you are comparing a 2bbl vs. 4bbl carb but yes, is that at 10" or 3" or ??? of water. What size venturis are installed? The 40DHLA comes with 34's, obviously with bigger vents it will flow more. This stuff confuses me but I do know that in VW draw thru applications the side draft carbs (even SU's) give much better drivability with a slight tradeoff in top end power over 4bbl carbs.

Mon Sep 05, 2011 1:53 pm

This is my archive :D

Weber 32/36 325 cfm???????????//
32/36 --- 300 cfm
32/36 choke surface area:
220 CFM/
1822.123 mm2
=0.121 CFM/mm2

38 DGAS --- 380 cfm
38 DCNF --- 400 cfm
40 DFAV --- 425 cfm

WEBER 32/36 DGV
255 CFM

WEBER 45 DCOE
400 CFM (32mm choke)
420 CFM (34mm choke)
440 CFM (36mm choke)

ere are flow figures for Triple DCOE carbs with the best trumpets fitted to the ends.

45 DCOE , 40 mm (E49 Charger), 444 cfm at 1.5" Hg
45 DCOE , 38 mm (E37 Pacer), 438 cfm at 1.5" Hg
45 DCOE , 36 mm, 418 cfm at 1.5" Hg
45 DCOE , 34 mm, 376 cfm at 1.5" Hg
45 DCOE , 32 mm, 324 cfm at 1.5" Hg
40 DCOE , 36 mm, 350 cfm at 1.5" Hg
40 DCOE , 34 mm, 346 cfm at 1.5" Hg
40 DCOE , 32 mm, 336 cfm at 1.5" Hg
40 DCOE , 30 mm, 316 cfm at 1.5" Hg
40 DCOE , 28 mm (Fiat 2300S), 279 cfm at 1.5" Hg
40 DCOE , 26 mm, 241 cfm at 1.5" Hg
40 DCOE , 24 mm, 202 cfm at 1.5" Hg
DCOE40 choke surface area :
350 CFM/
2034 mm2

= 0.172 CFM/mm2

with 20" water

Holley 1150 Dominator (4 barrel) 1180cfm (est.) total
Weber 48mm IDA w/44 venturi-311cfm (per venturi) 1244cfm total
Weber 51.5mm IDA w/47.5 venturi-353cfm (per venturi) 1413cfm total
JayCee 62mm /55 venturi -565cfm (per venturi) 2260cfm total

Dell'Orto 48mm DRLA 388.5cfm
Weber 48mm IDA 372.1cfm
Dell'Orto 45mm DRLA 329.3cfm
Weber 44mm IDF 292.3cfm
Dell'Orto 40mm DRLA 266.4cfm
Weber 40mm IDF 212.8cfm
Dell'Orto 36mm 205.8cfm

From the Vintage Speed forum:
40DCNF 32mm venturi- 396 cfm
40IDF 28mm vent with air horns-338 cfm
44IDF 32mm vent tall sec vent & air horns- 420 cfm @ 28"
44IDF 34" " " " " " " " " -445 cfm
44IDF 36 " " " " " " " " -465 cfm
48IDA 40mm venturis-561 cfm
48IDA 42mm vents -583 cfm

But I do not know which carburetor to use on my 1600turbo.
How : according to horsepower and torque , and RPM :?: :?:

Mon Sep 05, 2011 2:13 pm

dejan wrote:
But I do not know which carburetor to use on my 1600turbo.
How : according to horsepower and torque , and RPM :?: :?:
2 1/4" SU carb :wink: A 40DCOE Weber or 40DHLA Dellorto would work well too. A 1600 turbo doesn't need a real big carb (Joel Mohr is using a single Kadron on his motor build in this thread), take a look at other combos and read the Turbomania book by CB Performance, you'll get a feel for what works.

Mon Sep 05, 2011 3:42 pm

Blow thru Bocar 34 here....

Runs nice.

Clonebug

Mon Sep 05, 2011 4:43 pm

Clonebug, you need to post your combo in the Engine Builds/Combos Sticky. There needs to be more turbo builds in there. :D

Mon Sep 05, 2011 8:01 pm

DarthWeber wrote: Clonebug, you need to post your combo in the Engine Builds/Combos Sticky. There needs to be more turbo builds in there. :D

I have a build in STF Forced Induction if anyone wants to read it.
It would be a bit much pasting it here.

Clonebug

Mon Sep 05, 2011 10:25 pm

clonebug wrote: DarthWeber wrote: Clonebug, you need to post your combo in the Engine Builds/Combos Sticky. There needs to be more turbo builds in there. :D

I have a build in STF Forced Induction if anyone wants to read it.
It would be a bit much pasting it here.

Clonebug

Have you got a link to that thread?

Tue Sep 06, 2011 12:16 am

http://www.shoptalkforums.com/viewtopic.php?f=3&t=127936

Tue Sep 06, 2011 12:55 pm

DarthWeber wrote: dejan wrote:
But I do not know which carburetor to use on my 1600turbo.
How : according to horsepower and torque , and RPM :?: :?:
2 1/4" SU carb :wink: A 40DCOE Weber or 40DHLA Dellorto would work well too. A 1600 turbo doesn't need a real big carb (Joel Mohr is using a single Kadron on his motor build in this thread), take a look at other combos and read the Turbomania book by CB Performance, you'll get a feel for what works.

some of the books are not available in Macedonia and trying to hacked versions to download from the Internet, just Turbomania book by CB Performance does not :?

Tue Sep 06, 2011 2:27 pm

Car ran GREAT all weekend, Owner Robert cut his teeth on the drag strip...Best pass in his FULL weight '73 Super was a 16.30. The car definatly has a high 15 in it with more practice.....

Tue Sep 06, 2011 6:35 pm

Joel Mohr wrote: Car ran GREAT all weekend, Owner Robert cut his teeth on the drag strip... See, you can't go wrong with Kadron carbs! Hope Robert feels well soon. :P

Thu Sep 08, 2011 9:44 am

The Kadron performed flawlessly, and was VERY easy to tune and adjust....NO hesitation, and so far mileage seams good....

Thu Sep 08, 2011 9:56 am

Any jetting secrets? Did you change the emulsion tube? If it's proprietary that's OK, just asking. :D

Thu Sep 08, 2011 2:43 pm

No secrets! The Kadron is completely off-the-shelf...just a 180 main....