Dellow Technical Bits
Many Dellows sport various engine modifications from twin carburretters to superchargers and most of the competition winners with a few notable exceptions have Ford OHV Kent engines fitted in place of the standard sidevalve.
The most sought after tuning goodie for the sidevalve is the OHIV ( Overhead Inlet Valve ) cylinder head conversion. These were made predominately for the 100E although the E93A engine was also provided for. More about these conversions later but for now, here is a data sheet with the source of the major parts for these heads identified. Your help is sought to complete the list and make corrections where I have got it wrong. These data are published in good faith but I can't guarantee that there are no errors.
FORD
O.H.I.V. CYLINDER HEAD CONVERSIONS DATA SHEET
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HEAD MAKE |
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ENGINE
TYPE |
E93A |
100E |
100E |
|
INLET
VALVES |
No info
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TRANCO
2808 |
Ford 1500cc Classic Capri inlet valves fit with slight increase in guide bores original was a jaguar part |
|
SPRINGS |
No info
|
1275
MARINA ? |
Jaguar as above
|
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GUIDES |
No info
|
No info
|
No info
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PUSHRODS |
LRG |
'B'
SERIES (see
note 1) |
TRIUMPH
1200 (see
note 2) |
|
ROCKERS |
No
info |
ROVER
12hp /80 (see
note 3) |
WILLMENT
|
|
TAPPETS |
LRG |
FORD (WITH
THE ADJUSTERS) (REMOVED see
note 1) |
FORD (
WITH SPECIAL ADJUSTERS) |
|
SPECIFIED
PLUGS |
LODGE HBLN |
No info
|
LODGE
HL
10 |
|
ALTERNATIVES (see note 5) |
CHAMPION N-5 |
CHAMPION
G-61 or G-63 NGK CR6HS (see note 5) |
CHAMPION G-61 or G-63 (equiv. NGK C8E) (see note 5) |
|
VALVE
GAP (INLET) |
no
info |
.004" |
.006" to .008" |
|
BOLT
TORQUES |
no
info |
no
info |
no
info |
|
IGNITION
ADVANCE |
no
info |
no
info |
As
Ford 100E settings |
|
GASKET |
7W-6051-ELVA |
100E-6051-ELVA |
See note 4 |
|
EXHAUST
VALVE |
JAMES
XB1381 |
STANDARD
OR |
STANDARD
OR SPECIAL |
|
EXHAUST
SPRING |
TERRY
VS 318 |
TERRY
VS 483 |
TERRY
VS 483 |
|
PISTONS |
HEP
RSW10165 |
HEPOLITE
13555 |
HEPOLITE
13555 |
NOTE 1. At the lower end, the diameter needs to be ground down to the diameter of the pushrod shaft so that they fit in the tappet with the adjusting screw removed. The pushrods I bought at autojumble labelled as MGB/I800 are identical in all other features as my genuine ELVA parts.
NOTE 2. The pushrods I bought at autojumble labelled Triumph 1200 are identical to the WILLMENT part except for being 0.125 inch shorter in length. This can easily be adjusted by putting a 1/8 inch spacer under the tappet screw or if the screws are lost they can be remanufactured 1/8 inch longer. This also makes a more robust screw.
NOTE
3. Two
different sources have informed me of the source of these rockers, both having
actual knowledge. I am not sure which is correct, Rover 12hp or Rover 80.
Perhaps they are both correct and as with other manufacturers Rover kept some
parts going over a number of different models and years.
NOTE 4. The shape of the Willment combustion chamber is slightly different to the Elva and although the Elva gasket fits the bolt pattern and waterways in the head and block, it will not be suitable for the Willment head. However I use a solid copper gasket which I have fettled to suit both heads. This cannot be done with the composite copper/asbestos type of gaskets.
NOTE
5. The 10mm plugs for the Elva and Willment heads are not
easy to come by, my Willment head had Champion racing plugs in it when
purchased second hand. These were 10RL49 and were of racing pattern; I did
some research and came up with the Champion G-61 which seems to work perfectly
well although I am having oiling problems and have now changed to G-63 which
seem better. I
am told that the NGK CR6HS works well with a supercharged Elva engine, however
this has only a 1/2"reach so may be in a modified head. It would seem
that a heat value between 6 and 8 in the NGK range may be suitable. NGK spark
plug symbols explained here.
The Lodge HEL10 appears to have been a special and is unlisted, I have however recently
found 4 at an autojumble. If I told you the price I paid you would go green!
Hint: visit a friendly Ferrari or Honda motorcycle dealer and see what they have - many Ferraris
have 10mm long reach plugs.
Better hint: contact Bruce Thorne who can do genuine new Champion G-63 racing
plugs in boxes of 4 at a silly price of £6.99 +£1.25 p+p - a fraction of the
list price. I've just bought a load so get in quick. his e-mail is bruce.thorne@virgin.net
If
you can help fill in any of the blank spaces in the table above or can provide
any practical know-how or even just a chat, please
contact me at davehaley@btinternet.com .
Gears and Ratios.
There were an amazing number of different gear sets available for the humble 3 speed gearbox fitted to Dellows and many others. The available ratios are explained below, and because it is possible to fit 100E internals, with the exception of the main shaft, to the E93A casing, those ratios are included as well.
This information has been gleaned from contemporary articles and books and is produced in good faith. If you spot a mistake, please let me know.
Don't ask me where you can obtain any of these, most of the standard parts are available from Small Ford Spares ( see Links page) but I would guess the special ratios are unobtainable.
I have now included the Small Ford Spares close ratio gear set.
Note: second & third gear references are to gearstick position. Buckler E, F, G, have indirect top with gearstick in position 2
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FORD
E93A AND 100E GEARBOXES - STANDARD AND SPECIAL RATIOS |
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10hp
(E93A type) Gearboxes |
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100E
gearboxes |
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FORD |
BUCKLER
SPECIAL GEARS |
S.A. |
S.F. |
|
FORD |
S.A. |
BUCKLER |
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S.A.
= Super Accessories
S.F. = Small Ford Spares |
|
8HP |
10HP |
TYPE
A |
TYPE
B |
TYPE
C |
TYPE
D |
TYPE
E |
TYPE
F |
TYPE
G |
10HP |
E93A box |
|
100E
pre 1955 |
100E
from 1955 |
100E |
Type
54 D/W |
Type
54 C/W |
|
teeth
on main drive gear |
|
14 |
15 |
20 |
19 |
18 |
17 |
22 |
23 |
24 |
17 |
19 |
|
14 |
13 |
17 |
17 |
18 |
|
teeth
on countershaft wheel 1 |
|
30 |
29 |
24 |
25 |
26 |
27 |
22 |
21 |
20 |
27 |
29 |
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30 |
30 |
27 |
27 |
26 |
|
teeth
on countershaft wheel 2 |
|
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
23 |
|
23 |
23 |
23 |
23 |
23 |
|
teeth
on countershaft wheel 3 |
|
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
17 |
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17 |
17 |
17 |
17 |
17 |
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teeth
on countershaft wheel 4 |
|
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
13 |
|
13 |
13 |
13 |
13 |
13 |
|
teeth
on second gear |
|
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
21 |
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