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"Lotus" Dellorto set-up's.   Lotus numbered their carb set-ups (Stromberg & Dellorto intermingled) sequentially as set-up changed through the years and models.   Spec-1 through Spec-10 cover the evolution of the Lotus version of the naturally aspirated 907 and the 912...  Elite, Eclat, Excel & Esprit.   Lotus only used DHLA 45E's on their N/A 9XX's,  never 40's, and their Dellorto set-ups are covered by...

Spec 1, 1974 DOM 2.0 907,    38 mm chokes  (too big)

Spec 3, 1975 DOM 2.0 907,    35 mm chokes  (too small)

Spec 5, 1976-1980 Euro 907, 36mm chokes  (just right)

Spec 9,  1980+  2.2  912,       37mm chokes (Lo-CR, 9.4:1)

Spec 10, 198?+  2.2 912 HC 37mm chokes (Hi-CR, 10.9:1)

I run Spec 9 on two almost stock 907's and on a hotrod 2.2 907, 

Spec 5 is about right if you are running a near stock 907 with DHLA45's.
Front ............................ E907E0789F
Rear ............................. E907E0790W
Tag Number
Front ............................ 5295A
Rear ............................. 5294P
Carb Type .................... DHLA 45E
Choke .......................... 36 mm
Main Jet ....................... 160
Main Air Corrector Jet ... 230
Main Emulsion Tube ...... 7772-8
Idle Jet .......................... 50 (Too lean! Try 55-58 range)
Idle Jet Holder ............... 7850-7
Float Weight ................. 10 gr
Float Setting Height ...... 16.5 - 17.0 mm
Float Needle Valve ........ 170
Pump Jet ....................... 38V 42H
Starter Jet ..................... 70
Starter Emulsion Tube ... 7482-1
Power Jet ....................... ---
Slow Running Speed ..... 900 - 1000 rpm
Idle CO Level (hot) ........ 2.0 - 3.0%


Spec 9 is about right if you have a mildly warmed up 2.2 liter.
9.5:1 or 10:1 compression, up to 104 cams, headers.
Carb Type ..................... DHLA 45E
Choke ........................... 37 mm
Main Jet ........................ 160
Main Air Corrector Jet ... 230
Main Emulsion Tube ...... 7772-8
Idle Jet ......................... 55 (maybe a little lean, try up to 58)
Idle Jet Holder .............. 7850-9
Float Weight ................. 8.5 gr
Float Setting Height ..... 14.5 - 15.0 mm
Float Needle Valve ....... 170
Pump Jet ...................... 50H
Starter Jet .................... 95
Starter Emulsion Tube    7482-3
Power Jet ...................... ---
Slow Running Speed ..... 900 - 1000 rpm
Idle CO Level (hot) ....... 0.7 - 1.5%

 

Jensen Healey... 8.4:1, C-cam, 2.0 liter.
Carb Type ....................... DHLA 40E
Choke ............................. 35 mm
Main Jet .......................... 130
Main Air Corrector Jet ..... 160
Main Emulsion Tube ........ 7772-5
Idle Jet ........................... 52L (56L on 4-speed)
Idle Jet Holder ................ 7850-5 (aka, Slow Running Air Jet)
Float Weight ................... 8.5 gr
Float Setting Height ....... 16.5 - 17.0 mm
Float Needle Valve ......... 170
Pump Jet ......................... 45
Starter Jet ....................... 70
Starter Emulsion Tube ..... 7482-1
Power Jet ........................ 70
Needle Valve ................... 7180-15
Slow Running Speed ....... 950 - 1000 rpm
Idle CO Level (5-spd) ...... 0.2 - 0.3%
Idle CO Level (4-spd) ...... 1.2 - 2.0%



Default Dellorto Factory setting
Carb Type ..................... DHLA 45E
Choke ........................... ---
Main Jet ........................ 165
Main Air Corrector Jet ... 170
Main Emulsion Tube ...... 7772-6
Idle Jet .......................... 50
Idle Jet Holder .............. 7850-1
Float Weight ................. 10 gr
Float Setting Height ...... 16.5 - 17.0 mm
Float Needle Valve ........ 170
Pump Jet ....................... 33
Starter Jet ..................... 70
Starter Emulsion Tube .. 7482-1
Power Jet .......................... ---


Idle Jet Holders (Idle Air Corrector Jets).....
Weaker ................................. Normal ........................ Richer
7850.5,     .10,     .9,     .4,     .1,     .3,     .6,     .7,     .2,     .8
Idle Jet Holders in common useage
7850.1,     7850.6,     7850.2,     7850.8
 


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Contact Info: Gerald Kramer - Manager

Track Address: Eddyville Raceway Park 3260 Merino Avenue Oskaloosa, Iowa. 52577

Mailing Address: Eddyville Raceway Park 2462 Highway 163 Pella, Iowa 50219

Track Phone - 641.969.5596 Gerald Phone - 641.780.3534
manager@eddyvilleraceway.com


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