Outer Limits 4x4 Board

has any one had any exp with gaslead technology victoria looking to put them on a gq straight gas

I have a NL Pajero. It has been on gas/petrol since new, mainly gas.

I had some backfiring issues (minor issues only, no damage) and replaced the plugs and leads. Leads were Top Gun. Absolute sh1t. Major backfires, blew the air cleaner box apart. I could see the spark tracking down the core of the leads, and could see the spark jumping - fortunately to earth rather than another plug lead. I had to rebuild the airflow meter. Not happy. After 10000 km, I threw them away and got a set of Bosch - no problems now, although I am coming up to another set of plugs.

I queried NGK in Melbourne and they sent me a listing of recommended plugs for cars on gas. They generally recommend one grade colder plugs. Note the NGK numbering system uses a higher number for a colder plug ie PFR6G plugf for petrol becomes a PFR7G plug for gas. Also, I would recommend closing the plug gap slightly to reduce the voltage required to jump the gap. This reduces the tendency for cross firing (backfires).

If you are going to direct gas, you should have less chance of damage if you get a backfire, because there is less unburnt gas in the intake manifold to go bang. When you think about it, it isn't a given cylinder that backfires - the inlet valve is closed when the plug fires. It is a flashover to another plug lead which then fires the plug in another cylinder with its inlet valve open that causes the damage. With the bi-sexual system of petrol and gas, the mixer is usually set upstream from the throttle valve and you have a whole manifold system full of gas mixture ready to go.

I am about to order a new set of plugs for my Pajero and my wife's Magna (also on gas) and would welcome anyone else's comments on plugs and leads.

Buy a set of Gasmaster or Magnecore and you will never need to replace them again. Dont know anything about gaslead technology leads.

I've found Bosch work really well for gas while still being reasonaby priced.

I just had a set of leads custom made for Queensland igniition leads. i relise thats no where near you, but they were 9mm, something core insulated leads, and i paid 80 for the 6 plus a coil lead.

However, i went into burson's auto, formaly known as coventry, and asked for a set of 'Gas' only plugs, and he pulled out the book, said "you currently use a NGK BP6..., so best bet to go 2 steps colder, i would recommend the BP4..." General consensus is that i have now got worse plugs than i had to start with.
As they are already fitted, do you think its possible to pull them out and have them replaced with the right ones, or do i cut my loses and purchase another set?

I only use leads from ICE, we can supply them, the Bosch leads are OK in the lead but the boots go hard and seal poorly and the clip on the plug lead isn't reinforced with spring steel as the ICE ones are which means they get loose on the plug.


Cheer

Joel

I've found Bosch leads to be pretty good value for money
last set i fitted to the maverick cost about $39
about 1/2 the price of many other brands
Normally change all my leads about every twelve months as all leads tend to rub on other things around engine causing thin or damaged areas on the leads

there is a mob in Oakleigh AMR I think it is that do staino core gas leads for just about all models.

The funny thing is they arent much more expensive that std leads but are heaps better. I got a 9mm set for about?? $90

The bosch leads will need changing every 12 months due to the reasons I mentioned earlier, the ICE leads are good for 100 k klms or more, probably 4-5 years for most drivers.


Joel

narns1mav wrote:has any one had any exp with gaslead technology victoria looking to put them on a gq straight gas

run ice ignition leads mate you know i've stuffed around with the crap a bit

PGS 4WD wrote:The bosch leads will need changing every 12 months due to the reasons I mentioned earlier, the ICE leads are good for 100 k klms or more, probably 4-5 years for most drivers.


Joel

Do you know who the distributor is in Brisbane?

just fitted some new leads from gas lead technology to my chev in landcruiser. Couldnt reckomend him enough they have been alot better than off the self leads, dont burn as easily and a realy helpfull bloke. they also worked out cheaper than shelf leads.

Running some Gas spec leads from ICE Ignition in Melb on my duel fuel Falcon. Rang him and paid over the phone at 4pm and they arrived in the post the next day, no idea how he managed that. Great service and he offered 300,000 k warranty on them, boots are easy to get off as well.
Definately worth spending a bit extra for good gear when running LPG/Duel fuel. Was around $100 delivered for a 6cyl set about 18 months back