• The Roadster Factory Recovery Fund - Friends, as you may have heard, The Roadster Factory, a respected British Car Parts business in PA, suffered a total loss in a fire on Christmas Day. Read about it, discuss or ask questions >> HERE. The Triumph Register of America is sponsoring a fund raiser to help TRF get back on their feet. If you can help, vist >> their GoFundMe page.
  • Hey there Guest!
    If you enjoy BCF and find our forum a useful resource, if you appreciate not having ads pop up all over the place and you want to ensure we can stay online - Please consider supporting with an "optional" low-cost annual subscription.
    **Upgrade Now**
    (PS: Subscribers don't see this UGLY banner)
Tips
Tips

Front carburetor

Share this page

vette

vette

Darth Vader
Country flag
Offline
In my opinion the front carb is ported most directly to the front 3 cylinders and the back is ported to the back 3 cylinders but the intake manifold is interconnected for the purpose of balance. I know if I adjust my carbs such as leaning out the front carb I will see it mostly in the front 2 cylinders with the 3rd cylinder showing somewhat of the interconnected mixture, meaning it is affected somewhat by the rear carb as well.
 
OP
AUSMHLY

AUSMHLY

Obi Wan
Country flag
Offline
I have a Gunson Colortune and need to know which 3 cylinders are for the front and which 3 are for the back carbs.
 
Keoke

Keoke

Great Pumpkin
Country flag
Offline
AUSMHLY said:
I have a Gunson Colortune and need to know which 3 cylinders are for the front and which 3 are for the back carbs.
Click to expand...
BJ8,

which cylinders does the front HD8 carburetor manage?​

Front Carb: Clyn=#1,2,3-Yeah It aint no Daimler---LOL
 
Last edited:
steveg

steveg

Yoda
Gold
Country flag
Offline
AUSMHLY said:
I have a Gunson Colortune and need to know which 3 cylinders are for the front and which 3 are for the back carbs.
Click to expand...

If you're going to use the Colortune, you should have two - one plug in #2 and one in #5.

There's tons of discussion of colortunes vs other tuneup methods if you search the archives. I've used them for years and am not really satisfied. Some have said ethanol screws up the colors.
 
red57

red57

Jedi Knight
Country flag
Online
Because of the balance port in the manifold, all carbs affect all cylinders to some degree - as vette says, the front carb would have it's biggest affect on the front three cylinders but will affect the rears too, just to a lesser degree.

I believe this is why both jets should be down the same distance from the bridge and both carbs should have the same air flow at idle and more importantly, off idle. Then, if everything else is correct, you theoretically have the same a/f mix and volume in all cylinders = smooth running engine.
 
Keoke

Keoke

Great Pumpkin
Country flag
Offline
red57 said:
Because of the balance port in the manifold, all carbs affect all cylinders to some degree - as vette says, the front carb would have it's biggest affect on the front three cylinders but will affect the rears too, just to a lesser degree.

I believe this is why both jets should be down the same distance from the bridge and both carbs should have the same air flow at idle and more importantly, off idle. Then, if everything else is correct, you theoretically have the same a/f mix and volume in all cylinders = smooth running engine.
Click to expand...

YES Red 57 that is correct
 
C

CraigC

Jedi Trainee
Country flag
Offline
Michael, the Jag XK engines number their cylinders backwards. 1 is at the back and 6 is at the front. Don't know if they use this system on any other engines, modern or vintage.
 
Keoke

Keoke

Great Pumpkin
Country flag
Offline
CraigC said:
Michael, the Jag XK engines number their cylinders backwards. 1 is at the back and 6 is at the front. Don't know if they use this system on any other engines, modern or vintage.
Click to expand...


Thank you Craig for clarification here , Yes Daimler did too
 
Similar threads
Thread starter Title Forum Replies Date
G Fuel line elbow for front carburetor. Triumph 5
56HealeyDan 100-4 Front Crankshaft Seal Austin Healey 2
AngliaGT 1997 Miata - Anyone Have a Picture on How to Mount the Front License Plate Bracket? Other Cars 12
mctriumph For Sale front apron 57 Tr3 Triumph Classifieds 0
71TR6 TR2/3/3A TR3A Front Bumper Mount Triumph 11
1 TR2/3/3A Rimmer Brothers Replacement Front Wing Quality? Triumph 8
Carlbanan56 MGB Front hub MG 4
F For Sale E Type Series II front and rear bumpers good condition Jaguar Classifieds 0
J MGB Front Wheel Bearings. Re-grease or replace? MG 19
scottkilpatrick TR4/4A Front Brakes - Basics for Pads Triumph 11
C MGB-GT MGB-GT Front Ride Height MG 0
C MGB-GT Front Ride Height MG 0
J For Sale Bilstein Front Shocks for Jaguar E-Type 727-498-6493 Jaguar Classifieds 0
J TR2/3/3A Mystery knocking sounds at front wheel Triumph 11
E Wanted 1963 Healey 300 mark 2 front grille wanted Austin Healey Classifieds 0
K TR2/3/3A Front brake hub removal to access Vertical Link bolts(screws) Attached pictures. Triumph 1
K TR2/3/3A How to remove the front brake hub from the brake disc? Triumph 11
AUSMHLY Front Wheel Spin Drag Austin Healey 6
T TR2/3/3A Looking for a TR3A front bumper Triumph 6
mctriumph TR2/3/3A Front Suspension upgrades for the 59 Triumph 10
vpanza Wanted TR3 FRONT backplates needed Triumph Classifieds 2
K TR2/3/3A Rear tire pressure when there is an anti roll bar at the front of the car? Triumph 1
CARSINC For Sale Sprite Front Wire Wheel Hubs Spridgets Classified 0
bighealeysource Front Brake Adjusters Austin Healey 0
L Wanted right front turn signal 1975 TR6 Triumph Classifieds 2
G For Sale NEW PHOTOS: Triumph TR3 Chassis Frame + Front Suspension, Fits TR2,TR3,TR3A,TR3B Triumph Classifieds 1
TR3Acustodian TR2/3/3A Replacing "H" front badge Triumph 11
G Rebuilding Front Seats Austin Healey 4
drooartz MGB Front suspension rebuild is next MG 57
Joel Lester TR2/3/3A What final front suspension torque settings needed? Triumph 7
H TR4/4A Advise asked for front repair Triumph 1
A BN7 Front Hub Stud Nuts Austin Healey 5
P 100/6 Front Wheel Alignment Austin Healey 10
Prof. T Wanted 1974 - TR 6 Front Chrome License Plate Holder Triumph Classifieds 1
S Wanted BT7 Front Passenger Side Seat Pan Austin Healey Classifieds 0
S For Sale Triumph TR 2-3 Front Left Fender Triumph Classifieds 2
B Wanted Bugeye front bonnet fender mirror like this Spridgets Classified 5
P MGB 1974 MGB front spring length. MG 0
B TR4/4A Spax, Gaz and Koni on Front Triumph 12
G TR2/3/3A TR3A Front Sway Bars - Choice? Triumph 3
K TR2/3/3A TR3 front air vents mounted under the grill...seen on race cars for better air flow to radiator. Triumph 1
G MGB '71 MGB Front End Rebuild MG 2
S BJ8 Front Side Lamp/Turn Signals Austin Healey 1
Popeye TR4/4A Latest thoughts on TR4A front springs? Triumph 8
X Front End Alignment Austin Healey 14
FrogPond "57 100E Front Hubs on E494A Spindles ? Other British Cars 6
A SOLD!! TR3A Girling Type A brake caliper for right front Triumph Classifieds 0
M Front caliper rebuild 1970 Series 2 E-Type Jaguar 0
K TR2/3/3A Oil leaks at two front cylinder head studs? Triumph 3
craigshealey3000 Front End Shake Austin Healey 31

Similar threads

Top