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The Magical Mystical Weber DCOE

The
Numbers
Tuning and
Jetting
Do I Run a
Single 45
or Dual 40's?
Tuning and 
Service PDF

(2 meg file size)
Weber
Resources
on the Internet
User Photos
and jettings
  Adjusting
Twin DCOE's
The Fuel
Flow Path
Physical
Dimensions
Excellent Article
by Mickey Luaria

Virtual
Tour

Rasors Fuel
Flow Pathes

The Jetting
Calculator

---------

An email from
a Racer

Photo Gallery of end user installations

   .....a project in process. data is in complete and constantly being updated.......

       The following images (will ALL soon hopefully) contain links, and information as to the jet settings being used and the engine modifications each setup is configured for. So check back regularly. This page is updated regularly as these individuals supply me with info.
       The photos are web links where applicable
(blue border on picture). E-mail links  are included where available. There are a few site links for more user info at the bottom of the page.

last updated 07/14/2010

            An interesting aspect to keep in mind when viewing these configurations is to note the ancillary hardware such as breather hose routings, header configurations (IE: LCB, 4 into 1, 4-2-1 etc), ram pipe lengths, filters/no filters, etc. etc. , along with whatever other modifications have been performed.

Nick Truman's
Spec: ??   Twin DCOE 40's
dcoedualsnick.jpg (30517 bytes)

?????????
?????????
?????????
?????????
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Jari Tabell's  Race engine
Spec : 1961 MK 1 1147cc Twin DCOE 40's
dcoe_jt.jpg (15135 bytes)
8-port cylinder head,
gas flowed, double valve
springs etc.
Modified Camshaft
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Jari Tabell's  Race engine
Spec : 1961 MK 1 1147cc  Very rare DCOE 42
Jari_42dcoe.jpg (10240 bytes)
gas-flowed head head,
10.5:1 compression
302 camshaft
lightened and balanced
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Joe Curry's  'Tiny Tim'  Race engine
Spec : 19xx MK x 1296cc Twin DCOE 40  2
Curry_tiny_tim_dual40.jpg (9644 bytes)
+0.040 overbored
(1551cc), fully ported &
polished head,  roller rockers, oversized valves,  11.6:1 comp.
TSI 3-6.6krpm high lift flat curve cam
Choke 30
Aux. Venturi 4.5
Main Jet 115
Emulsion Tube F16
Air Jet 150
Pump 35
Idler Jet 45F8
Ex.Valve 0
Lee Russell
Spec: 19xx 1296cc Dual DCOE XX's

Hey Lee...We need a photo
to go with your spec!

+0.040 overbore
oversized valves
semi-race cam
balanced
Choke 28
Aux. Venturi 4.5
Main Jet 115
Emulsion Tube F16
Air Jet 200
Pump 35
Idler Jet 50F11
Ex.Valve 100

 

Jon Wolfe Full Race Monster
Spec: 1967 MkIII  1147cc  Dual DCOE 45's
Hey Jon...We need a photo
and your jetting specs!

http://www.btinternet.com/~jon.wolfe/racecar.htm

ported head
oversized valves
Kent 264 cam
high ratio rockers
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Cy Stanton
Specs: 1979 1500 series Twin DCOE 40 18
dcoeenginebay01.jpg (38280 bytes)
European spec flat
top pistons, Kent mild
road  cam  (jetting is the standard 'out-of-the-box"
conversion kit settings.
(Weber kit # K125)
Choke 30
Aux. Venturi 4.5
Main Jet 115
Emulsion Tube F16
Air Jet 170
Pump 50
Idler Jet 45F9
Ex.Valve 50
xxxxxxx
Spec: 19xx 1500cc Dual DCOE XX's
dcoe yellow1.jpg (14063 bytes)
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xxxxxxxx
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xxxxxxxx
xxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Laura Gharazeddine's infamous 'Nigel'
Spec: 1979 1500 series Single DCOE 45
laura-spitengine.jpg (10662 bytes)
?????????
?????????
?????????
?????????
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Paul Tegler's screaming little monster
Spec: 1978 1500 series Single DCOE 45 152
Single DCOE 45 152
(+0.040 overbore) = 1534cc
TR6 flat top pistons
shaved head (.09
3")
dual valve springs
9.93:1 compression
mild road cam 0.340"lift

7
800rpm redline
Choke 34
Aux. Venturi 4.5
Main Jet 145
Emulsion Tube F16
Air Jet 155
Pump 45
Idler Jet 55F8
Ex.Valve 40
Charlie Brown's
Specs 19??
1500 series Dual DCOE 40's
dcoe_charlie.jpg (16085 bytes)
Photo taken at the Svea Farm Hunt Country Classic show Oct 99
(+0.040 overbore) = 1534cc  TR6 flat top pistons,  head cc'ed , ported & polished,
block decked 0.165"
~9.5:1 compression
custom cam grind eqiuv. to Kent fast road
Choke 28
Aux. Venturi 4.5
Main Jet 115
Emulsion Tube F16
Air Jet 155
Pump 40
Idler Jet 45F9
Ex.Valve 0
Gary Neckolaishen    
Spec: 1975  1500cc Single DCOE 45 152

Hey Gary...We need a photo
to go with your specs!

 +0.030 overbore
full race cam
'74 Lucas 45D4 dist.
K&N filters
Choke 32
Aux. Venturi 4.5
Main Jet 125
Emulsion Tube F16
Air Jet 160
Pump 50
Idler Jet 45F9
Ex.Valve 50
Float valve 200
Norbert Schumann    1969 MKIII
Spec: 1969 
1300cc Dual DCOE 40's
norbetschumann.jpg (10660 bytes)
 Ported and polished
intake with 1500 valves
light wieght valves
4-2-1 header lightwieght rods and pistons
electronic ignition
Choke 30
Aux. Venturi 4.5
Main Jet 120
Emulsion Tube F16
Air Jet 155
Pump 35
Idler Jet 50F8
Accel. pump 35
Ex.Valve 50
Dave West   
Spec: 1977  1500cc Dual DCOE 45's
davewestdual45.jpg (15013 bytes)
European spec flat
top pistons, Kent fast
road  cam  shaved head 0.02" 9:1 comp
double valve springs
2" exhaust with glass-
pack and Monza tip
Choke 30
Aux. Venturi 4.5
Main Jet 120
Emulsion Tube F16
Air Jet 185
Pump ?
Idler Jet 45F9
Ex.Valve ?
Per Andersson   1973 Mk IV Spitfire
Spec: 1973  XXXXcc Dual DCOE 40,s
 mild road cam
unleaded valve seats
otherwise totally stock
Choke 30
Aux. Venturi ?
Main Jet 115
Emulsion Tube F14
Air Jet 185
Pump 35
Idler Jet 45F19
Ex.Valve ?
Larry Vaughan   year/model_vehicle
Spec: 19xx  XXXXcc
Single DCOE 40 18
 - temporary setup -
waiting for block
to be rebuilt
Choke 27
Aux. Venturi 4.5
Main Jet 125
Emulsion Tube F15
Air Jet 160
Pump 50
Idler Jet 50F9
Ex.Valve 100
Dave Powell    year/1300cc GE
Spec: 19xx  XXXXcc
Dual DCOM MP4/5  40's
Fully flowed and balanced, 290 fast road cam shaved head 0.08" 10:1 comp, Ford valve springs lightend EVERYthing
Choke 30
Aux. Venturi 4.5
Main Jet 115
Emulsion Tube F16
Air Jet 160
Pump 30
Idler Jet 50F2
Ex.Valve ?
David Frew   year/MKIII
Spec: 19?? 
1296cc  Dual DCOE 40,s
David_Frew_Spit_MkIVa.jpg (20260 bytes)
 4-2-1 mainfold
1500 inlet valves
ported head
Piper 284 rally cam
Choke 30
Aux. Venturi 4.5
Main Jet 120
Emulsion Tube F16
Air Jet 175
Pump 35
Idler Jet 45F9
Ex.Valve 60
owners_name    year/model_vehicle
Spec: 19xx  XXXXcc Dual DCOE XX,s
 xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
owners_name    year/model_vehicle
Spec: 19xx  XXXXcc Dual DCOE XX,s
 xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
owners_name    year/model_vehicle
Spec: 19xx  XXXXcc Dual DCOE XX,s
 xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
owners_name    year/model_vehicle
Spec: 19xx  XXXXcc Dual DCOE XX,s
 xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?

 

owners_name    year/model_vehicle
Spec: 19xx  XXXXcc Dual DCOE XX,s
 xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Well the rest aren't Spits but they're still using DCOEs
so I've included them here anyway
It's a TVR but still beautiful.
Spec: xxxx 
Triple DCOE 40's
dcoex3tvr.jpg (14330 bytes)

Photo taken at BOG 2001
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xxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Don Collins  1970 MGB
Spec: 18V series bored to 1950cc (2 Liter)
pics 5-7
Balanced,
Ported polished
Stage 2 racing head,
2" Peco header and exhaust
Choke 36
Aux. Venturi 5
Main Jet 165
Emulsion Tube F16
Air Jet 16
Pump 65
Idler Jet 65F8
Ex.Valve ?
Larry Miller    1959 Bugeye Sprite
Spec: 1974  1275cc  Single DCOE 40

larrybugeye.jpg (10122 bytes)
 0.030" overbore
1.5 roller rockers
11:1 compression
Aldon Yellow dist.
Flat top Hepolite pistons
Aluminum head
Choke 34
Aux. Venturi 4.5
Main Jet 145
Emulsion Tube F2
Air Jet 175
Pump 45
Idler Jet 45F9
Ex.Valve 0



updated
info
3/2001

28
4.5
145
F2
175
45
45F9
0
Ron Sloave XXXX Bugeye Sprite
Spec: xxxxx  xxxxcc Single DCOE 45

ron slove DCOE.jpg (13127 bytes)
xxxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx
xxxxxxxxxxxxx  xxxxxxxxxxxxx
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
Hugh Barber    1974 TR6
Spec: 1974  2498cc Triple DCOE 40,s

click here to go to his site
2.5 liter
S2 cam   
10:1 compression
header
custom air box with single K&N filter
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?
owners_name    year/model_vehicle
Spec: 19xx  1275cc Single DCOE 45

specs available
but no pic. yet!
 66 cam
9.7:1 compression
with air cleaners
Choke 34
Aux. Venturi 3.5
Main Jet 145
Emulsion Tube F2
Air Jet 190
Pump 50
Idler Jet 50F9
Ex.Valve 50
owners_name    year/model_vehicle
Spec: 19xx  1275cc Single DCOE45

specs available
but no pic. yet!

 Bone stock
1275cc A Series
MG engine
Choke 33
Aux. Venturi 3.5
Main Jet 155
Emulsion Tube F2
Air Jet 185
Pump 50
Idler Jet 45F9
Ex.Valve 50
owners_name    year/model_vehicle
Spec: 19xx  1275cc Single DCOE45

specs available
but no pic. yet!

 Stock
1275cc A Series
MG engine
Choke 28
Aux. Venturi 3.5
Main Jet 145
Emulsion Tube F15
Air Jet 180
Pump 50
Idler Jet 40F9
Ex.Valve 50
owners_name    year/model_vehicle
Spec: 19xx  1275cc Single DCOE 45

specs available
but no pic. yet!

 240 cam
headwork
std compression
Choke 34
Aux. Venturi 3.5
Main Jet 130
Emulsion Tube F2
Air Jet 155
Pump 50
Idler Jet 50F9
Ex.Valve 50

 

owners_name    1972 Farrari GTC 4
Spec:   6  DCOE 40's (that's 12 throats folks!)
6 jets x 12 throats = 72 jets to play with
!
farrari1.jpg (12225 bytes)
 Mods unknown
What I do know
is I wouldn't want to have to try to tune this baby!
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?

 

owners_name    19xx Lamborghini
Spec:   6  DCOE 45's (that's 12 throats folks!)
6 jets x 12 throats = 72 jets to play with
!
 Mods unknown
What I do know
is I wouldn't want to have to try to tune this baby!
Choke ?
Aux. Venturi ?
Main Jet ?
Emulsion Tube ?
Air Jet ?
Pump ?
Idler Jet ?
Ex.Valve ?

     

         Well there are a lot of variables to contend with in trying to setup one of these monsters. But once, done, well worth it! Another site that has attempted to come up with some sort of user listing is a club 'down under' in Australia. their 'user's list' can be referenced for 948cc, 1098, and 1275 A-Series engines. (will open in a new window so you won't lose you place here)

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return to Teglerizer's home Page(c)1999  Paul's Spitfire Home PagePaul's MGB Home PagePaul's MG Midget Home Page   last edited 07/14/2010
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