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I always had it my head the Turbo Esprit had Dellorto DHLA 45 carbs.  Just checked and the service notes say DHLA 40H.  907 engines had 45's.  I assume this is right?

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DHLA40 is correct for yours, HC used DHLA45.

Phil, assuming your car is a UK spec, non-HC engine.........

UK Spec , RHD, 1985 MY, 2.2 TE, DHLA 40s , and now fully cleaned/rebuilt and running sweet as  ... Cheers loads @Sparky

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Discovered today. Refurb kit for 40 and 45 is the same

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Phil, assuming your car is a UK spec, non-HC engine.........

355922686_Screenshot2019-05-09at10_58_47AM.png.e649e6061a3b7cf19b3c1fe658b2f27e.png

Edited by ekwan
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Thanks.  I have this in the service notes. I have spoken to Dellorto who have the exact correct kit for the car.  More entertainment coming my way I think!

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Would love to hear discussion about the rationale behind the different choke sizes, and how they performed. USA option being suspect as to emissions limitations, but still going to a smaller choke in a larger body for the HC is interesting. 

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Not much effect expected between these differing carbs at this power level and configuration. 210 - 220 HP from a turbo'd  2.2 won't lean heavily on the choke size in my view. What was the restrictor diameter on the WRX rally cars of about 15 years back, when torque levels were on par with top-tier NASCAR V-8's?

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On 09/05/2019 at 04:59, ekwan said:

Phil, assuming your car is a UK spec, non-HC engine.........

355922686_Screenshot2019-05-09at10_58_47AM.png.e649e6061a3b7cf19b3c1fe658b2f27e.png

This was from earlier in this thread and the attached pic is from my WSM. Can anyone confirm which Carb I shoud have? How do I visually confirm what's in my car ('85 MY TE)

wsm-dhla-spec.jpeg

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None of the above!    An 85 UK spec Turbo uses the DHLA40 body.   Based on the WSM part number illustrated I assume they are NA variants

Earlier post has correct turbo part numbers.

 

Edited by 910Esprit
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Thanks - took some random pictures and spotted a "40" lurking under a bit of pipework 🙂. So the difference between 40s and 45s is internal? are the rebuild kits the same and mounting O-rings etc.? 

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10 hours ago, thebartman said:

Thanks - took some random pictures and spotted a "40" lurking under a bit of pipework 🙂. So the difference between 40s and 45s is internal? are the rebuild kits the same and mounting O-rings etc.? 

The barrel sizes would be different. I believe the aux venturis are of a different design between the 40s & 45s.

Also the choke sizes for the 40s range from 25-37mm.

The choke sizes for the 45s range from 28mm-40mm.

Even though there is an huge overlap in choke sizes, they are different for both 40s and 45s due to the difference in the external diameter needed to fit the smaller or larger barrels respectively.

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10 hours ago, thebartman said:

Thanks - took some random pictures and spotted a "40" lurking under a bit of pipework 🙂. So the difference between 40s and 45s is internal? are the rebuild kits the same and mounting O-rings etc.? 

You have to watch out for the acceleration pump diaphragms, I believe the rod-ends on these might different for Lotus cars. I know for a fact, the one supplied for the DHLA45E are definitely specific for Lotus 2.2 engines.

 

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On 08/05/2019 at 04:53, naasaa said:

My 1984 Turbo Esprit from US has DHLA45.

907 and 912 (2.0L & 2.2L) NA engines had DHLA45's

910 (2.2L) Turbo UK cars standard compression had DHLA40's

910 (2.2L) Turbo HC and USA cars had DHLA45's

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