Dual down draft Carb selection for 2056 |
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Dual down draft Carb selection for 2056 |
technicalninja |
Feb 25 2023, 12:23 PM
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#1
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Senior Member Group: Members Posts: 1,299 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
I'm looking at the Empi dual down draft carb kits and had a quick question regarding differences in the carbs themselves.
It looks like they have HPMX or Dual D carbs available. Which one would you choose? Should I lean towards real Webers or Dellotos? The intention here is to use the kit in its stock form initially and later change to port fuel injection using the carbs as throttle bodies much like MB911 is doing with his EFI conversion. http://www.914world.com/bbs2/index.php?showtopic=363246 Being able to remove everything in the bores is critical for me. No fixed boosters or venturis is a requirement. I'm planning on starting with an 8.5-9.0 compression 2056 with a webcam #86. I am planning on having the final engine as a 96mm bore/78mm stroke, but this will be in the future. I believe I should start with 44 mm carbs instead of 40. Suggestions, tips, and opinions would be greatly appreciated. |
technicalninja |
Feb 28 2023, 01:12 PM
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#2
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Senior Member Group: Members Posts: 1,299 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
Superhawk996 has it right for engines below 2100 cc
For a street based car the proper choice is the 40s It looks like best low-end performance is to be had with 28mm venturis. Seem damn small IMO but folks on this forum have drivability issues with larger. I have had a bit of a set back with my 2.0 core. Both heads have tiny cracks starting from the spark plug threads. I will not be able to inexpensively build a "euro-spec" 2.0. I did find these for my final target motor (78X96 now). Super stubby DCOE flanges... https://store.jenvey.co.uk/throttle-bodies-...m-vshort-tspxxi These fit my design better than anything else I have found. Just blades and a place to fit TPS units. Should I end up building a carbureted 2055 I will stay with 40mm butterflies, but I would order the HPMX Empi carbs. They appear to be a high-quality clone of the Weber IDF/IDA series and have minor improvements over a true Weber IMO. Webers did NOT work nearly as good as Mikunis in the L-series Datsun world. Thanks for all of the replies... |
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