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Plug wires...

Supercop8100

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luvs hds Enthusiast

luvs hds

Posted
Posted

A couple months back, Chevy High Performance Mag did a test w/bolt on mods....one being Granatelli plug wires. They dyno'd the truck after each test. Just changing the wires made 15hp and 17trq on a 5.3L. They couldn't figure out why until they measured the resistance w/an ohm meter. OEM wires had 958ohms of resistance....the new wires had only .5ohms. I ordered the wires and measured the resistance myself. OEM wires showed 1001ohms and new wires showed .9ohms. They're alot of $$ (169.00 from Jegs) but have a lifetime warr. In conjunction w/the Grant Mas and cold air, they showed something like 55hp and 47trq increase....not bad.

  • 2 weeks later...
gmcjoe Senior Enthusiast

gmcjoe

Posted
Posted
A couple months back, Chevy High Performance Mag did a test w/bolt on mods....one being Granatelli plug wires. They dyno'd the truck after each test. Just changing the wires made 15hp and 17trq on a 5.3L. They couldn't figure out why until they measured the resistance w/an ohm meter. OEM wires had 958ohms of resistance....the new wires had only .5ohms. I ordered the wires and measured the resistance myself. OEM wires showed 1001ohms and new wires showed .9ohms. They're alot of $$ (169.00 from Jegs) but have a lifetime warr. In conjunction w/the Grant Mas and cold air, they showed something like 55hp and 47trq increase....not bad.

 

 

 

I remember that article. No way in hell do I believe the wires pulled 15 HP.

99-2door Senior Enthusiast

99-2door

Posted
Posted
A couple months back, Chevy High Performance Mag did a test w/bolt on mods....one being Granatelli plug wires. They dyno'd the truck after each test. Just changing the wires made 15hp and 17trq on a 5.3L. They couldn't figure out why until they measured the resistance w/an ohm meter. OEM wires had 958ohms of resistance....the new wires had only .5ohms. I ordered the wires and measured the resistance myself. OEM wires showed 1001ohms and new wires showed .9ohms. They're alot of $$ (169.00 from Jegs) but have a lifetime warr. In conjunction w/the Grant Mas and cold air, they showed something like 55hp and 47trq increase....not bad.

 

 

 

I remember that article. No way in hell do I believe the wires pulled 15 HP.

 

 

 

 

 

Yeah, I'm not buying that either. There is a measurable difference in the resistance, but jumping that gap on the plug is the big deal.

  • 2 months later...
sleepur606 Enthusiast

sleepur606

Posted
Posted

It's interesting a set of plug wires would show such a high gain in horsepower by lowering the resistance. The reason for the high resistance is to maintain a decent amount of voltage while having a very insignifacant amount of amperage. The high voltage output of your coils going through a low resistance set of wires would create a lot of amperage, but you need VOLTAGE to jump the gaps at your plugs. From what I know and understand it would probably be better to keep the resistance the same or similar and with the Granatellis running $170 or more, I would just go with some AC Delco or MSD...got mine on eBay for less than jegs. Anyway, just my opinion.

Black02Silverado Senior Enthusiast

Black02Silverado

Posted
Posted
In conjunction w/the Grant Mas and cold air, they showed something like 55hp and 47trq increase....not bad.

 

 

 

 

 

He said that in conjunction with the Grant Mas and cold air kit they showed a 55hp and 47trq increase. Not just the wires alone.

 

Unless you seriously mod your truck, going to extremes with plug wires is like killing a mosquito with a sledge hammer. Just a bit of overkill. But then that is just me. I could be wrong.

 

One has to remember that even a complete Westers PCM tune pulls thoses kind of numbers and not to much more from what I have read from others that have posted their results on their PCM tune. But hey if it really happened then cool. I wouldn't be so lucky.

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