FAQs Lpg
Igntion, Information page.FAQs |
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links to other FAQ pages
[ V8 Engine Fitting Information ]
[ Rover 3.5, 3.9, 4.2
to 4.6 Conversion ] [
LPG Conversion details ] [ Fuel Injection Section ]
[ Weber 500 & SU Carbs ]
[ Mallory Ignition
Systems ] [ General
Engine Problems ] [
General Information ]
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| Magnecor Plug Wires Quality
leads, required for LPG use |
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With LPG rated up to 112 octane, not only
is it important to get the spark in earlier, it is also required to hit it with
a bigger spark. to encourage best combustion. Whilst it is possible to add
appropriated "Duel igntion timing, and stronger spark output, It is worth
remembering that using "High Street level Plug wires will prevent your intended
gains from getting through Magnecor plug wires not only last a lifetime, they
will insure the Best LPG efficiency for all Petrol engine types. |
Unlike the majority of
ignition wire brands that have proliferated the performance market in recent
years, Magnecor Race Wires are not just branded cheaply constructed generic
spiral conductor ignition wires that most performance parts promoters like to
include in their product lines to sell through speed shops and
mass-merchandisers in the USA.
We now have a full range of "Magnecor" V8 Rover leads in stock,
(models 1969 - 2002, Both the superlative KV85 range, & the less expensive
*8mm Street wires". An essential addition to any performance or efficiency
seeking engine.
"Click" here to check-out your existing distributor's condition and
suitability.
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But before you
start.
Firstly consider what you have already and its suitability to
LPG conversion
Added economy & efficiency advantages are always &
certainly attainable Using RPi LPG upgrades, such as Optimax ECU re-programming
(Efi models) and RP4 cam upgrade. Plus Mallory and Electronic ignition
upgrades. After all economy comes from both cheaper fuel and increased economy,
or at least curing the efficiency drainage of what little efficiency your
engine may have now, especially if its in "High Mileage" & less than
perfect shape. "See where to look to find out more".
The following possible V8. LPG Conversion plus engine upgrades
would normally Yield minimum 15 - 30% Minimum efficiency and power/torque over
a Std factory new or existing engine and vastly more from a less than perfect
used engine, (you can use info on our
"General info page above" to
assess your engines condition, & available improvements.
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| Advance and retard Power Amp system exclusive for V8's
& LPG use |
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LPG can indeed be as economical and powerful as fuel but the
issue is with the ignition timing and spark intensity due to the slower flame
front of LPG,
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New New !!!! What is
the "Advance by retard system")?.
LPG can indeed be as economical
and powerful as fuel but the issue is with the ignition timing and spark
intensity due to the slower flame front of LPG, Either upgrade to a Mallory
duel point. as above( Carb type only) Or fit our unique new retard by advance
system (Electronic ignition types only) We have just released this
devise that replaces the original ignition amp on (or separate from) your
distributor, (we can supply it with a brand new distributor also) and allows
you to set base timing to 18 deg. thus giving a healthy 38 - 40 deg of advance
when on lpg this will be the answer to all LPG prayers, and what's better when
running on petrol it retards the ignition back to std 8 idle - 28 deg. @4000.
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The A & R unit is completely hand built
exclusively for us,& Uses, Insulated Gate
Bipolar Transistor (IGBT) output switch Technology
You could say If the std Rover Spark Amp was
compared to this one then I am sure it would have had the Amstraad logo
somewhere.
More A&R Igntion. 'uses
upgrades and explantaions'. (Click)
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| Rover V8 Distributor
Variants - Wiring Details. (When re-using original distributor)
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 Update 1.
Update 2
Update 3.
You may need Acrobat
reader
Remote
Amplifier Type 35DM8 Identified by having a small black socket on a bracket
attached to distributor body
The two black
wires should be cut close to the socket and stripped back for fitting of
appropriate connectors.
Bullet types can be used but are best fitted as a
male and a female to the distributor and also one of each to the orange and
violet amplifier inputs. It will then not be possible to get them wrong in
future.
The polarity must be as shown in the drawing beside, otherwise
there will be problems achieving the static setting and also a likelihood of
increased timing scatter.
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This is what it
looks like with the remote amp wires removed. Please see updates for wiring
color change. |
Update 1.
Update 2
Update 3.
You amy need Acrobat
reader
Bolt-On Amplifier
type 35DLM8 Identified by small amplifier module bolted to distributor
body
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This is what it looks
like with the remote amp wires removed. Please see updates for wiring color
change. |
The
external Std Amp should be removed to reveal a small blue socket to which
connections need to be made by soldering. Flying leads of 32/0.2mm wire about
6in long should be stripped, twisted and tinned. If the tinned ends are now
slightly flattened by squeezing with pliers, they should be able to fit snugly
inside the socket receptacles before soldering in place. Do not leave the heat
on the connections longer than is required to get a good connection as the
receptacles will tend to move as the plastic softens. See the diagram for
polarity which must be observed as for 35DM8 type. Again, mixed-sex connectors
should preferably be used to ensure polarity cannot be got wrong. |
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| How about the extra Spark intensity,
"Where does it come from".? |
Well, you did
ask !!!"State of the art Insulated Gate Bipolar Transistor (IGBT) output
switch for low self-heating, maximum reliability, and a bigger cleaner
spark" ....or words to that effect..... Normally, the power switch (that which
actually breaks the coil current and causes the spark) is either a "bipolar"
(oldest) or less likely a "mosfet" (newer) type.
Problem with bipolar
is that switching off is the worst thing they can be asked to do (inherently) -
they are just not good at it (slow) because of the physics and this incurs
penalties of inefficiency. The mosfet does not have this switch-off problem but
for other technical reasons tends to "waste" more of the battery primary
voltage, meaning that there is both extra heating of the device itself and loss
of primary coil voltage which again translates into efficiency loss.
Obviously any self-heating of the device has to come from somewhere and
naturally it subtracts from the spark energy available. The IGBT used
(Insulated Gate Bipolar Transistor) is a recent combination of bipolar and
mosfet technology. They do a pretty good job of combining the best features of
bipolar and mosfet technology while eliminating the bad characteristics of
both. In addition they are generally "tweaked" to optimize them for certain
applications which appear mainly to be automotive ignition and fluorescent
light inverters. How about something like -
What is the cost of this upgrade?.
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Dual Timing
Advance by retard system as detailed £POA (can also be used with Above type
existing electronic distributors if in very good order)
Or supplied
with a basic recon rover O/E distributor (35DM8,) Additional £POA (while limited stocks last)
"NEW" now Also available as an Igntion upgrade for Non LPG vehicles and upgradeable for only £POA when/if you switch to LPG use . So because you can gain from this technology now, ! "Why wait". ?
| Some Lpg Frequently asked
Questions regarding igntion systems, upgrades. |
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What are the most
important factors I should consider.?.
the most important issues. are
with the actual condition and specification of your engine to run LPG
efficiently. If you first consult our "V8 Engines in
general page" you can give yourself a good idea of what your engine
condition is likely to be. There is little point in fitting LPG if your engine
has worn camshaft or leaking head gaskets.
LPG is a higher
octane, what benefit can this have?.
. It is a know fact that LPG is
112 octane and petrol has continued to decrease in quality over the years and
is now only 92 - 95 octane at best, This has caused manufactures to not only
keep lowering engine compressions but to install ignition systems with less and
less ignition advance. (early V8's 20 deg. and later ones only 12 deg.)
Although we do not expect that adjusting you compression is a worthwhile
upgrade, improving ignition spark quality and adding increased timing advance
certainly is
What can be done with ignition system quality and function
(Carb Models only)
.the best
ignition system by far all Carb engines is The Mallory Dual Point, this will
give the slower burning LPG 8 degrees more ignition advance and almost double
the spark intensity off standard electron units, (higher octane requires better
spark intensity to burn quicker) it will also (and perhaps most importantly)
not be suffering from the normal mechanical wear that will be present in the
advance system (Vacuum and mechanical) and shaft of a standard older
distributor. (Mallory can be found here)
Luminition on an Older distributor is a very poor compromise this added
attention to your conversion will make the efficiency loss of LPG almost nil,
For the Rover V8 with Carbs,
What about igniton
Leads.
We have found the issue of
"Backfire" on LPG conversions is nearly always caused by poor quality or older
Plug leads, and often even new std quality ones will be problematic.
If not convinced you should try replacing going through a
Hot car wash, and see how well it drives when it comes out. The huge rise in
damp/humidity is sure to show up the worst in any lpg engine, with regards it
plug wires.& igntion system.
Not only this but LPG being 112
octane not only wants a unique set of igntion timings, as explained above but
it also needs a much bigger spark to get it going. Their leis the issue of not
only replacing your Plug wires, but replacing them with a product that allows
far superior igntion spark.
See the info on
Magnecor leads, (click here )
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Customer comments. |
Customer comments has now moved to its own section
(Click)
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Do
you have a supplier in my Country? |
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We actively ship our parts all over the
World, over (50 Countries to date) Do not worry if no one is listed in your
area as we can handle all shipping details for you. And even if you have
trouble speaking English, our worldwide network of customers can normally help
with any Translation For European Translations.
Translation's.
"Click"
RPi
Recommended Worldwide V8. Specialist's "Click"
With so many filling
Station's coming on line. This list now has its Own page, Furthermore, if
it gets any bigger (As it will ) The pages will soon be split in to Zones. Its
not only the UK that is seeing huge rise in LPG outlets, but the rest of Europe
and the World.
List of LPG Fuelling
stations. update July 2000 "Click Here"
Scotland, Wales and N - Ireland "Click
Here"
This FAQ Q/A
Section is solely for information exchange only, and Rpi or its contributors
accept no lability for any issues arising from following up on our printed
advise, or subsequent cost that may arise from the same,
For our part we
do our best to check all information provided and printed is correct to the
best of our knowledge. And as V8 specialists for 15 years we don't get it wrong
often.
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links to other FAQ pages
[ V8 Engine Fitting Information ]
[ Rover 3.5, 3.9, 4.2
to 4.6 Conversion ] [
LPG Conversion details ] [ Fuel Injection Section ]
[ Weber 500 & SU Carbs ]
[ Mallory Ignition
Systems ] [ General
Engine Problems ] [
General Information ] |
|
Disclaimer
Prices do not include local EU.Tax.(VAT).
Prices & stock are subject to change without notice. Information and advice, as always, is free.
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