Just installed my Permatune and coil from Lonnie.

Wow, what a difference! I notice that the car starts much faster and idles better.

Just curious what everyone that has installed a Permatune is running for spark plugs? I am still using the Autolite #4063.

Lonnie recommends the Beru Ultra X #UXF79. Anyone using those? What are your thoughts?

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Mike
Jalpa #12071

Aerodynamics are for people who can't build engines -- Enzo Ferrari

Does anyone make a platinum plug for it?

PermaTune recommends not using platinum plugs. Not sure why....

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Mike
Jalpa #12071

Aerodynamics are for people who can't build engines -- Enzo Ferrari

platinum plug have no benefit but are just expensive.
The permatune is fine, I had it also in my Jalpa and I tested it also in the countach.
Good thing on the jalpa, it works with the tacho whereas the MSD causes always troubles.

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RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530 sold in August 2008, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch

When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.

Quick rundown on plugs:

Platinum and Iridum:
Platinum and Iridium plugs are designed to meet modern OEM 100,000 Mile Service Requirements. The primary reason is due to their excellent anti-corrosion properties.

These types of spark plugs were designed with extremely fine tips to maximize emissions/fuel economy in modern injected engines where the gas/fuel mixture is optimized.

In general, these type of spark plugs perform poorly in carbureted cars... especially those that are running rich.

Copper, Silver & Gold:
Copper and Silver plugs generally have significantly larger tips and better conductivity characteristics than Iridium and Platinum. Consequently these "older", less expensive plugs will always out perform more expensive Platinum or Iridium plugs in carbureted cars... again especially as these cars tend to perform better when running slightly rich.

Silver plugs if you can find them (Bosch by special order is one supplier) have a slightly larger tip and better conductivity characteristics than the Copper. Many swear by silver plugs as they have a reputation for being far less critical to fouling in stop and go city traffic. The disadvantage to silver is Life Cycle (corrosion) and will need to be replaced more often. They also tend to cost a bit more.

Finally Gold plugs are mainly used for racing due, are expensive and have extremely short life.

Bottom line, standard copper NGK or Bosch are your best bet... unless you can find a good silver equivalent and are willing to fork out and extra $2 per plug.

Thanks for the clarification, it matches my experience, I used a short time the Denso plugs in my CT and went back to the old style Champion A59GC of the Diablo (the QV used A59G).
On the Jalpa I had Bosch plugs, need to find an old bill to check which type we installed.

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RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530 sold in August 2008, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch

When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.

Thanks Raymond. I did the same thing. Years ago I put a set of platinum plugs into an older Porsche and the damn thing started running lousy.

As you stated, some of these plugs can get pretty expensive. The marketing is so strong on these items that people (my self included) put them into their older cars and assuming that there will be performance benefits.

At any rate, platinums are fine in modern fuel injected vehicles, but I agree with you 100%... stick with a good standard copper plug on your carburated car and you'll be much happier.

Mike, I am running Bosch W6 plugs (the original plug crossed over to a W5 heat range). Not to sound like an endorsement for Bosch... just happen to live down the street from a Bosch warehouse. I'm sure the Copper plugs you are running are just fine... as in the case of most automotive parts I'm sure someone else like Champion or NGK is probably manufacturing these plugs for them. Take care, John