Ignition HT Leads for LPG / Dual Fuel RR Classic 91

[Shirley]

RE: Range Rover 1991 Classic Auto.
Hi Fellas,
I have been told that I need to replace my HT leads and plugs after an attempt to have the RR Tuned.
What was recommended was Bosch Stainless Shielded LPG HT Leads for about $97.00 and Magnatec, or something or other for a total of $186.00.
I have ordered the Bosch leads and NGK BPR6ES Plugs.
Please tell me I have made a suitable choice..... please?
Fingers crossed,
Shirley.....

[Andrewpv01]

Those should be OK. AFAIK the Magnatec(sp?) are the bees knees, but expensive.

I have 9mm leads on mine (can't remember what brand).

I have been told by the mechanic who installed my LPG system that the plugs should be changed every 10k and the leads every 40k(whatever brand). This is to ensure thay are in top working condition.


Andrew

[Shirley]

Hi Andrew,
Struth 10K for Plugs and 40K for leads.... That takes the profit out of the LPG a bit, hey?
Had a feeling that there would be a catch when using such a dry fuel...
That's a whopper.
Cheers,
Shirley.....

[Andrewpv01]

That is only their "recomendation". I think it is more to cover them to stop the possibilty of backfires detsroying the AFM.

I should probably do both now:(.

Oh well- it's only a tank and a half of ULP.

Andrew

[Shirley]

A tank and a half - ? - This week anyway.
This has gone past scary, real scary.....

Shirley......

[PhilipA]

Its Magnacor.
I have had mine for 8 years still going strong. And they are the 7MM?, the smaller black ones anyway. So good value at $125 or whatever I paid.
Regards Philip A

[chazza]

Gasmaster are very good as well; check their website.

[Shirley]

Hi Phillip,
Well everything worked out better than I had ever hoped. Heaps of power, super smooth, easy to start and good economy.
I went with the NGK BPR6ES (Slightly colder heat range) The Bosch 7.0 mm leads (5 year warranty) $120.00 and put a new Plenum Hose on between the Mixer Ring and the AFM.
The old hose actually had holes in it that could not be seen.
I put a rubber ball in one end of the hose and then filled it with water. Well it was like a shower.
Now I know why it was hard to tune.
Anyway, put a new Air Filter in as well and opened the high speed valve 1/4 turn and took it for a run.
It was awesome. It was like someone put a rocket under the back of the thing and no more backfiring, smooth Idle and easy to start.
Anyway, I found a guy locally that was trained in Germany and Finland who has some very good backing by a lot of the local 4WD owners that have had conversions done by him, all reckon he is tops.
I have the truck booked in for a Diagnostic and adjustment to fine tune the system for the best combination as I just richened everything up so make sure that I was getting enough gas to stop any stray backfires.
He reckoned I did well but it was best to make sure it was not set too rich and set it up for the best all round performance and economy.

[Shirley]

Hi Phillip,
Well everything worked out better than I had ever hoped. Heaps of power, super smooth, easy to start and good economy.
I went with the NGK BPR6ES (Slightly colder heat range) The Bosch 7.0 mm LPG leads (5 year warranty) $120.00 and put a new Plenum Hose on between the Mixer Ring and the AFM.
The old hose actually had holes in it that could not be seen.
I put a rubber ball in one end of the hose and then filled it with water. Well it was like a shower.
Now I know why it was hard to tune.
Anyway, put a new Air Filter in as well and opened the high speed valve 1/4 turn and took it for a run.
It was awesome. It was like someone put a rocket under the back of the thing and no more backfiring, smooth Idle and easy to start.
Anyway, I found a guy locally that was trained in Germany and Finland who has some very good backing by a lot of the local 4WD owners that have had conversions done by him, all reckon he is tops.
I have the truck booked in for a Diagnostic and adjustment to fine tune the system for the best combination as I just richened everything up so make sure that I was getting enough gas to stop any stray backfires.
He reckoned I did well but it was best to make sure it was not set too rich and set it up for the best all round performance and economy.
ere, he took a look at the installation that was done by the original guy, screwed his face up and commented that it wasn't a pretty job at all, so it's booked in for Friday morning for some refinement.
Really happy about the way it is running now. I pulled the Holden lifters out and put R/Rover ones in which immediately stopped the noises and clatter and I don't have to wait for oil pressure to build up any more when I first start it in the morning. It starts clean now with no noise at all. The way it was supposed to be in the first place.
I gave the Holden 308 lifters to a mate of mine who is doing up his HZ and was glad to be rid of them.
Definitely not a suitable substitute for Range Rover at all.......
A costly learning process but what was learned was well worth it...
Cheers,
Shirley..

[350RRC]

Hi Shirl,

I've used the ordinary Bosch induction leads for a number of years with no probs on gas. Have the stainless spiral wire around the core and very low impedence (<4 or 4000 ohms, can't remember which. 10 or 10,000 is getting to the upper limit for gas).

Gas guy told me some years ago that the spark plug ceramic insulators get a coating over them from gas that is conductive and leads to probs such as dist cover tracking, backfires, etc. He said it could not be cleaned off........hence more frequent plug replacement.

I found this coating dissolves in less than a second after being touched with a fine brush dipped in spirits of salts. Plugs are immediately put in a container of fresh water afterward, dried, gapped and replaced.

Can get way more than 10k kms out of them doing this.

cheers, DL

[Shirley]

Hi DL,
Yes, I was told the same thing today by the guys at ECO TEC, a local LPG conversion crew.
They indicated that it is not uncommon to require plug replacement every 10,000 Km and about 40,000 km for the Bosch leads.
Apparently the LPG we get here in the city is not as good as it could be and a lot of outback Service Stations quite often get deliveries of a better class of Propane that burns cleaner and has a lot less residue and associated problems.
Seems to be the trend to dump all of the low grade crap on the cities, it's harder to detect with so many people using it. But what can you expect.
Mind you, it's only a rumor, hey?
Cheers,
Shirley......

[NOFUSS]

Hi DL,
Yes, I was told the same thing today by the guys at ECO TEC, a local LPG conversion crew.
They indicated that it is not uncommon to require plug replacement every 10,000 Km and about 40,000 km for the Bosch leads.
Apparently the LPG we get here in the city is not as good as it could be and a lot of outback Service Stations quite often get deliveries of a better class of Propane that burns cleaner and has a lot less residue and associated problems.
Seems to be the trend to dump all of the low grade crap on the cities, it's harder to detect with so many people using it. But what can you expect.
Mind you, it's only a rumor, hey?
Cheers,
Shirley......
Shirley its a called blended gass in the cities as there is more gas sold in the cities so it dose not sit in the big tanks for to long. out in the out back towns that do not have a big turn over in Lts blended gas wil settle out in to diffrent layers so they only put pure lpg in the country towns thats why some people get a upset fuel consumpion when they fill up in the cities after car has been tuned in the country work shop. i hope that made sense:D