Im with Dodgeman on this!!!!!! "Pertronix, good leads, platinum plugs & GT40 coil that's a combination that can't be beat" Same setup I run! never had a problem! Nice smooth idle even with a big cam ( by smooth i mean lumpy as )

I have been running platinum plugs in a standard 1200 engine for years & i will swear by them.

The fine tip electrode will fire a spark across a given gap at a given compression pressure at a lower voltage than a standard plug, so you can open the gap up by about 10% to get a bigger fatter spark without pushing your coil to its limits.

I run a Pertronix electronic ignition conversion, which is essentially a points replacement system, & I also run a Bosch GT40 sports coil with high quality ignition leads.

With a layer of ice over the car, I pump the throttle about four times, give it 3/4 choke & hit the starter.
The engine is usually running within one revolution of the crank & it rarely needs more than two revolutions.
A nice fat spark will light the fire even when mixtures are pretty damn lean, such as in cold starting.

Pertronix, good leads & platinum plugs, that's a combination that can't be beat.

Horsepower increase?
The only way that this will increase power is if your existing ignition is faulty leading to misfires which result in a power loss.

Rectify this fault with the above upgrade & light the fire every time in every cylinder, then your engine will deliver its full rated output.

They will not increase power. However, if you fit double-platinum plugs they will last for 100,000 miles without needing re-gapping. Regular plugs need to be re-gapped every 12 months or 12000 miles. Single-platinum plugs last I think up to 40,000 miles without re-gapping.

Brand new standard plugs will make as much power as brand-new platinum plugs. Either will make more power than worn-gap plugs.

Hi Guys

Is there any one who is using Platinum Spark Plugs in their dattos ?
are you getting any increase in fuel figures or pulling power

thanks
Regards
sumith