High Performance BRISK Silver Spark Plugs for CHRYSLER Petrol, LPG & CNG Motor Vehicles
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Fitting the Correct Spark Plugs for LPG - CNG or Petrol
Check to see what spark plugs you have fitted in your vehicle, if you have platinum or Iridium tipped spark plugs fitted they are No good for LPG or CNG there is No such thing as an iridium or platinum LPG spark plug! we recommend you replace your spark plugs with Genuine LPG / CNG spark plugs > Brisk Silver Spark Plugs are made for LPG - CNG & Petrol they have solid silver electrodes to produce a superior spark as you can clearly see in the chart below Silver has the highest Thermal & Electrical Conductivity where as Nickel, Platinum & Iridium are very poor, Silver spark plugs come in two types (YS) single electrodes for all vehicle types & The (LGS Premium) type multi electrode type theses can only be fitted to modern vehicles with electronic ignition systems they are not recommended for older vehicles with ignition points or poor ignition systems, the LGS spark plugs are specially designed by Brisk to produce incredible sparks across 2.9 mm gaps in a 360 degree firing pattern - theses are special spark plugs they cannot & do not require any adjustment they are ready to fit.

Do Spark Plugs make a Difference?
Yes 100% - Vehicles fitted with Poor Quality spark plugs produce a weak spark, to ignite a fuel with a weaker spark the engine requires a much richer fuel mixture - with poor spark plugs you will use more fuel even petrol, when running a vehicle on LPG or CNG you need a much stronger spark due to LPG & CNG being a dry fuel it is harder to ignite than petrol so you need a much richer fuel mixture! most vehicles are fitted with lambda control systems like petrol injection vehicles which correct the mixture by monitoring the exhaust emissions this can lead to a serious problem running on LPG or CNG with weak spark plugs as un burnt LPG or CNG has an affect on the vehicles lambda exhaust probe sensors which makes the sensors read incorrectly (weaker) the vehicles Ecu or lambda control system detects this & tries to correct this by increasing the fuel mixture even more although the system now thinks the mixture is correct is Not it is incorrect the engine is actually running far to Rich not only is this decreasing your fuel economy but also increasing the exhaust emissions CO & HC no longer a green conversion in some tested we have found the emissions to be much higher than petrol emissions & failed MOT's, this also has an increased affect on the engine & exhaust temperature which can seriously damage the catalytic converter due to overheating.

Common Symptoms found with Weak Spark Plugs
Poor Fuel Economy, Misfires, Poor idle, Stalling, Hesitation & Jerking under load, Less Power, Poor Performance in some cases undrivable on Lpg or Cng, Back fires, Engine management light coming on, Limp home mode, Exhaust system overheating, Lambda sensor damage, Catalytic converter damage, etc..

Spark Plug Gaps for LPG & CNG
when fitting Brisk Single Silver Electrode (YS) spark plugs it is recommended to set the spark plug gaps to the manufactures recommended gap as for Petrol unless otherwise listed for your model like (DR15YS-9) -9 being the recommended gap = 0.9 mm etc… if the gap is not listed then use the manufactures recommended on some vehicles with spark monitoring try reducing the spark plug manufactures gap by  0.1 mm to compensate for the dryer fuel - The (LGS) type spark plugs are specially designed spark plugs which produce incredible sparks across large gaps like 2.9 mm theses cannot & do not require any adjustment they are ready to fit.

Economy & Customer Feed Back on LPG , CNG & Petrol
Please Note: Fuel Economy on any fuel is very difficult to calculate as we all drive differently, all have different loads, all use different equipment & tuning of the systems, when fitting the New spark plugs the system should be retuned as most have be setup rich to work on the old type spark plugs, etc..  if you have tuning equipment you can do your own calculations by comparing the original tuning map to the new map tuning with the new plugs fitted, or by monitoring your fuel figures prior to fitting & then after, I always like to receive customer feedback of there test results, etc...!

Feed back from customer tests the results = on LPG increase in economy from 5 to 30% a few claiming more! - on Petrol up to 10% - Performance increase up to 5% - Noticeable while driving most customers say they have noticed the difference in driving the vehicle saying it is more crisp & responsive with better fuel economy, customers with prior problems like hesitation, jerking, very poor economy caused by poor spark plug ignition have found the plugs solved most problems & after retuning the system to use the correct mixture, etc...  Motor cyclist noticed the difference in power & power band smoothness as well as a slight increase in fuel economy, etc...

But note: this does not mean you will get an increase or solve any of you systems problems as many other factures must be taken into consideration & account like the increase in fuel economy can be used as power & performance depending on how you drive! plus any Vehicles faults with the petrol or LPG system/s & Poor tuning, etc...

The following Tests in the Map Charts to the right are true photos of the tuning done on my Toyota Amazon 4.7i v8 fitted with Lpg Gas Injection with split fuel capability.

The First Chart (left)
fitted with the Original Iridium spark plugs the results = very poor economy on LPG & Problems with misfiring & hesitation I had use split fuel to inject a 30% petrol mixture with the Lpg under load to stop misfires & juddering due to poor ignition of the fuel & false lambda sensor readings - caused by the Iridium spark plugs!

The Second Chart (middle)
fitted with Standard Copper spark plugs the results = an improvement in fuel economy & split fuel reduced to inject 15% petrol mixture with Lpg under load to stop misfire juddering due to poor ignition of the fuel & false lambda sensor readings - caused by the copper spark plugs!

The Third Chart (right)
fitted with Brisk LGS Premium Silver spark plugs the results = massive improvement & increase in fuel economy over 30% gain compared to using Iridium spark plugs, split fuel mixture turn off no longer required running 100% LPG, no hesitation, no misfires no juddering! fuel map greatly reduced - see right picture.

The Final Test

fitted with Brisk YS Single Silver Electrode type spark plugs results = produced nearly the same Fuel Economy Results & map as that of the LGS Premium Spark Plugs.
But the (LGS) out performed the (YS) in driving performance, etc.
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Thermal & Electrical Conductivity of Spark Plugs the Best being Silver!
 

Spark Plug
Centre Electrode
Material

Thermal
Conductivity
(M•K)

Electrical
Conductivity
MS/m

Spark Plug
Expected Life
(Miles)

Silver

407

66

25/30,000

Copper

384

57

25/30,000

Gold

310

45

unknown

Iridium

147

18

90,000

Platinum

70

10

90,000

Nickel

59

10

10/20,000

Testes done with original Iridium - Standard Copper & Brisk LGS Silver Spark Plugs



Charts Clearly show a Good Reduction in Fuel Mixture being Injected across all Loads indexes

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To Order > Make A Note of the Plugs listed for your Model then Click on the Spark Plug Code this will take you to a new page with the plugs listed to Buy

YS spark plugs marked with End number  like -9 this is just the recommended gap to set them to before fitting

Spark plugs marked with *** is just for eBay "WTV-UK" Shop pricing only
Note: Before Ordering if your model or Brisk Spark Plugs are marked with ???? marks
  then you need to Email your Vehicle Details like below & Original Spark Plug Make & Number fitted - So I can confirm it is correct for your vehicle model
  if you prefer to you can check the cross reference of the spark plugs you have fitted in your vehicle via this link = Cross Reference
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WARNING: when you fit the New Brisk spark plugs you must check & retune the LPG or CNG system as the system will use less fuel with the spark plugs fitted!
Failure to do this will Foul the Spark Plugs & Misfire!
you do not need to retune the petrol's injection system on modern petrol injection vehicles it will self adjust
But on older petrol carburettor engines, non lambda controlled petrol injection system you should
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If you cannot find the spark plugs for your vehicle = then to help you & give you I will need the following from you =

1: Your vehicles Original spark plug make & number (without this I cannot help you) =?
2: Vehicles make & model =?
3: Vehicles year =?
4: Engine size cc or lt. =?
5: Engine model number (if available) =?
6: List of any modifications to engine or fuel system =?
7: Any other info you think maybe needed =?
(Original Spark plug information is normally in your vehicles handbook or engine bay or contact the main manufactures)
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
300 C 3,5  v6 183kw G FI Ngk ZFR5LP13G 2004> DOR17LGS DR17YS-9
300 C 5,7  v8 250kw V8 Champion RE14MCC4 2004> not available not available
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
300 M 2,7  v6 149kw - - 1998>  -  -
300 M 3,5  v6 189kw G FI - 1999> DOR15LGS DR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Cherokee 3,0  4 90kw L4 MPI - 1993> DOR17LGS DR17YS-9
Cherokee 4,0  6  - L6MPI - 1988>1990 DOR15LGS DR15YS
Cherokee 4,0  6 131-135kw MPI - 1991> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Cirrus 2,4  4  - X DOHC - 1999> DOR15LGS DR15YS
Cirrus 2,5  v6  - MPI H DOHC - 1995> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Concorde 2,7  v6  - MPI R DOHC - 1998> GOR17LGS --- ? GR17YS --- ?
Concorde 3,3  v6  - MPI T - 1993>1996 LOR17LGS LR17YS-9
Concorde 3,3  v6  - FF U - 1994> LOR17LGS LR17YS-9
Concorde 3,5  v6  - MPI F - 1993>1997 DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Crossfire 3,2  6 160kw engine Mercedes SLK - 2003> DOR15LGS DR15YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Daytona 2,5  4 114kw EDT L4 Turbo - 1992> LOR15LGS LR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Dodge Viper 8,0  v10  - E MPI V10 - 1996> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
ES 2,2  4 105kw EDR Turbo - 1988> LOR15LGS LR15YS
ES 2,5  4  - EDT - 1989> LOR15LGS LR15YS
ES 2,5  4 72kw EDM - 1988>1989 LOR15LGS LR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Grand Cherokee 3,3  6  - EGA - 1997>2001 DOR17LGS DR17YS-9
Grand Cherokee 4,0  6 131-135kw L6 MPI - 1993> DOR17LGS DR17YS-9
Grand Cherokee 5,2  v8 155-158kw V8 MPI - 1993> DOR17LGS DR17YS
Grand Cherokee 5,9  v8  -  - - 1997>1999 DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Grand Voyager 2,4  4 110kw  - - 2001> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
GS Turbo 2 2,2  4 130kw EDS Turbo 2 - 1988>1989 LOR15LGS LR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
GTS 2,2  4 109kw EDR - 1988> LOR15LGS LR15YS
GTS Shelby 2,2  4 130kw EDS - 1989> LOR15LGS LR15YS
GTS 2,5  4 108kw EDT - 1989> LOR15LGS LR15YS
GTS 2,5  4 72kw EDM - 1988>1989 LOR15LGS LR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Imperial 3,3  v6  - MPI 3 - 1990>1991 LOR17LGS LR17YS-9
Imperial 3,8  v6  - MPI L - 1991>1993 LOR17LGS LR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Le Baron GTC 2,2  4  - EDS - 1989> LOR15LGS LR15YS
Le Baron 2,2  4 105kw EDR - 1988> LOR15LGS LR15YS
Le Baron Turbo,GTC 2,2  4  - - 1988>1989 LOR15LGS LR15YS-9
Le Baron 2,5  4 72kw EDM - 1988>1989 LOR15LGS LR15YS
Le Baron 2,5  4 108kw EDT - 1989> LOR15LGS LR15YS
Le Baron Turbo 2,5  4  - EFI - 1988>1989 LOR15LGS LR15YS-9
Le Baron 3,0  v6 100kw EFA - 1990>1995 LOR17LGS LR17YS-9
Le Baron V6 3,0  v6 100kw MPI - 1990> LOR17LGS LR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Neon 1,8  4  -  - - 1998>1999 DOR15LGS DR15YS
Neon i 1,8  4 85kw  - - 1998> DOR15LGS DR15YS
Neon LE 2,0  4 98kw ECB 16V - 1995> DOR15LGS DR15YS
Neon i 16V 2,0  4 97kw  - - 1994> DOR15LGS DR15YS
Neon RT 2,0  4 112kw  - Ngk BKR6E 2000>2004 DOR15LGS DR15YS
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
New Yorker 3,3  v6  - MPI R - 1990>1993 LOR15LGS --- ? LR15YS --- ?
New Yorker 3,5  v6  - MPI F - 1994>1996 DOR17LGS DR17YS-9
New Yorker 3,8  v6  - MPI U - 1991>1993 LOR15LGS --- ? LR15YS --- ?
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
PT Cruiser 16V 2,0  4 103kw  - - 2000>  -  -
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Sebring 2,0  4  - L4 MPI Y DOHC - 1995>1999 DOR15LGS DR15YS-9
Sebring 16v 2,0  4 97kw  - - 2001> DOR15LGS DR15YS
Sebring 2,0  4 kw  - RE14MCC5 / LZTR5A-13 2004 ROR17LGS - not available n/a
Sebring 2,4  4  - 4G64 SOHC - 2001> DOR17LGS DR17YS-9
Sebring 2,4  4  - L4 MPI X DOHC - 1996>1998 DOR15LGS DR15YS-9
Saratoga 2,5  4 72kw EDM - 1990>1994 LOR15LGS LR15YS
Saratoga 2,5  4 72kw L4 EFI - 1990> LOR15LGS LR15YS-9
Sebring 2,5  v6  - MPI A DOHC - 1996>1999 DOR17LGS DR17YS-9
Sebring 2,5  v6  - MPI H DOHC - 1995> DOR17LGS DR17YS-9
Sebring 2,7  v6 149kw R DOHC - 2001> GOR17LGS --- ? GR17YS --- ?
Saratoga 3,0  v6 103kw MPI - 1990> LOR17LGS LR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Stratus 16V 2,0  4 98kw ECB 16V - 2001> DOR15LGS DR15YS
Stratus 2,0  v6 96kw EEB MPI - 2000> DOR15LGS DR15YS-9
Stratus 24V 2,5  v6 119kw EEB MPI - 1995>2001 DOR15LGS DR15YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Viper GTS 8,0  v10 286kw MPI V10 - 1996> DOR17LGS DR17YS-9
Viper GTS 8,0  v10 331kw MPI V10 - 1996> DOR17LGS DR17YS-9
Viper GTS ACR 8,0  v10 338kw MPI V10 - 1999> DOR17LGS DR17YS-9
Viper RT/10 8,0  v10 299kw MPI V10 - 1992>1995 DOR17LGS DR17YS-9
Viper RT/10 8,0  v10 305kw MPI V10 - 1996>1996 DOR17LGS DR17YS-9
Viper RT/10 8,0  v10 331kw MPI V10 - 1997> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Vision 24V 3,5  v6 155kw EGE MPI - 1994> DOR17LGS DR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Voyager i 16V 2,0  4 98kw  - - 1998> DOR15LGS DR15YS
Voyager i 16V 2,4  4 109kw  - - 1996> DOR17LGS DR17YS-9
Voyager i 16V 2,4  4 108kw  - - 2001> DOR17LGS DR17YS-9
Voyager 1 2,5  4 72kw EDM - 1988>1990 LOR15LGS LR15YS-9
Voyager i 2,5  4 72kw L4 EFI - 1988> LOR15LGS LR15YS-9
Voyager i 3,0  v6 104kw MPI - 1988>1991 LOR17LGS LR17YS-9
Voyager 1 3,0  v6 100kw EFA - 1988>1991 LOR17LGS LR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Voyager 2 2,5  4 72kw EDM - 1991>1995 LOR15LGS LR15YS-9
Voyager 2 3,3  v6 120kw EGA MPI R - 1991>1995 LOR17LGS LR17YS-9
Model Lt.  Cyl kw or Bhp Engine type Original petrol plug Year BRISK Spark Plugs for = LPG/CNG & Petrol
Voyager 3 2,0  4 98kw ECB COO - 1998> DOR15LGS DR15YS-9
Voyager 3 2,4  4 110kw EDZ BOO - 1996> DOR17LGS DR17YS-9
Voyager 3 3,3  v6 116kw EGA MPI R - 1996> LOR17LGS LR17YS-9
Voyager 3 3,3  v6 122kw EGA MPI - 1996> LOR17LGS LR17YS-9
Voyager 3 3,3  v6 kw - Ngk PLZTR5A-13 2000> ROR15LGS -
Voyager 3 3,8  v6 122-131kw EGH MPI - 1996> LOR17LGS LR17YS-9
 
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