Granatelli MPG/Plus Gas Saver Ignition Wire Set?

[ratherbehiking]

Anyone know if this ignition wire set works as stated or if its just another scam.

Granatelli Performance Ignition Wire Set is GUARANTEED to boost your MPG to 15%!
Boosts horsepower and torque and ensures a smoother running engine
Rates 0-ohm resistance (compare to 4,000-7,000 ohms for conventional wires)

http://www.jcwhitney.com/GRANATELLI-...1579_10101.jcw

[Krayzie]

Most likely a scam. There is no way the factory ignition wires could be affecting mileage by 15%...1% would be reasonable but not 15

[cfg83]

ratherbehiking -

I definitely agree with Krayzie that the claim is too high, but I can understand your question. I would be tempted, because $50 isn't too big an outlay, and maybe this would be a nice "upgrade" for your engine, if nothing else.

On the other hand, I think "ignition wire benefits" can be drivetrain specific. Is there an "Isuzu Rodeo" forum or some kind of Isuzu forum that would be able to comment on "your engine + these wires"?

I started reading the reviews. Some but not all claim better MPG, but with all sorts of cars. Lots of butt-dyno analysis. If it is as easy to swap as claimed, you would be in a position to do an A-B-A test. (EDIT: Whoops, I was assuming you had a ScanGauge for the A-B-A test. Not cool on my part)

CarloSW2

[ratherbehiking]

Yeah I figured that 15% was a very crazy number I am still wondering if a small increase in FE would still make these worth buying.
Right know Im just looking at my options cause im gonna be replacing both my wires and plugs pretty soon.

[cfg83]

ratherbehiking -

Just for fun I am going to to a simple ROI based on a 1 MPG increase :

23.22 MPG Before
24.22 MPG After (4.3% increase, a BIG assumption)
$2.00 for one gallon of gas
$60 for ignition wires (after S&H)



But, for this to pan out, you gotta get that 1 MPG, .

CarloSW2

.

[Vwbeamer]

very doubtful these would help at all, unless your current wires are not in good shape.

Assuming your current wires are in good shape, they will deliver the exact same voltage and spark.

The voltage in the coil builds until it reaches a point that it is high enough to jump the gap on the spark plug.

Lets say this is 5000 volts, as long as your current wires can deliver that amount, better wires will make no difference. It makes no difference how big the coil, wires etc are, when voltage builds to 5000 volts it's going across the gap. When that happens the ignition system sees ground, and the voltage build up stops.

On engines with high compression / high cylinder pressures / larger spark gaps, then it may take more volt to jump the gap. In this case, stock wires-plugs, coils etc may not be able to provide the voltage to jump the gap.

So on high rpm, hi performance engine, there may be some gain, at higher rpms and higher throttle loads.

When driving for economy, the cylinder pressure is low. low cylinder pressures make it easier to for the spark to jump the gap, and actually requires less voltage.

[ConnClark]

There is a reason spark plug wires have resistance. They have resistance to limit electrical noise. The noise can be bad enough to induce a spark on a spark plug on an adjacent wire. The noise also tends to interfere with radio reception. Another side effect of the resistance is it extends the duration of the spark as the condenser discharges.

With zero ohm resistance spark plug wires you will get a hotter spark of shorter duration. This also means your plugs won't last as long

[cfg83]

ConnClark -

Originally Posted by ConnClark

There is a reason spark plug wires have resistance. They have resistance to limit electrical noise. The noise can be bad enough to induce a spark on a spark plug on an adjacent wire. The noise also tends to interfere with radio reception. Another side effect of the resistance is it extends the duration of the spark as the condenser discharges.

With zero ohm resistance spark plug wires you will get a hotter spark of shorter duration. This also means your plugs won't last as long

This make a LOT of sense to me. With some performance wire systems like Nology (totally opposite/different tech than the Granatellis), you need special spark plugs to make them work.

CarloSW2

[Vwbeamer]

Does the resistance slow the electrical spark down?

Is electrical power traveling on low resistance wires hotter?

If takes 5000 volts, ( or 6000 or 400 or 12, whatever it is) to jump the spark plug gap, that how much will be delivered. Electrical power going down a low resistance wire will be no hotter than on going down one with 1000 ohms.

Once enough voltage is produced to jump the spark gap, a spark is made. it's the same spark regardless of the coil or wire that carries it, as long as they are capable of producing or carrying the voltage and current needed.

Only way to get a bigger spark is a bigger spark plug gap.

Originally Posted by ConnClark

There is a reason spark plug wires have resistance. They have resistance to limit electrical noise. The noise can be bad enough to induce a spark on a spark plug on an adjacent wire. The noise also tends to interfere with radio reception. Another side effect of the resistance is it extends the duration of the spark as the condenser discharges.

With zero ohm resistance spark plug wires you will get a hotter spark of shorter duration. This also means your plugs won't last as long

[ConnClark]

Originally Posted by Vwbeamer

Does the resistance slow the electrical spark down?

it doesn't slow the spark down. It slows the discharge of current once the spark is established.

Is electrical power traveling on low resistance wires hotter?

If takes 5000 volts, ( or 6000 or 400 or 12, whatever it is) to jump the spark plug gap, that how much will be delivered.

until the spark is established about 99% of the voltage provided by the coil will be developed across the spark plug gap. After the spark is established the voltage across the gap drops and voltage across the resistance of the wire increases.

Electrical power going down a low resistance wire will be no hotter than on going down one with 1000 ohms.

incorrect, energy is expended to over come the resistance of the wire.

Once enough voltage is produced to jump the spark gap, a spark is made. it's the same spark regardless of the coil or wire that carries it, as long as they are capable of producing or carrying the voltage and current needed.

incorrect, a spark carrying more current is hotter than a spark carrying less current. Resistance in the wires limits the current.

Only way to get a bigger spark is a bigger spark plug gap.

A bigger coil, multiple coils, or changing to a magneto will produce a bigger spark.