Have any of you ever seen any kinda difference in performance or power with plug wires? hi resistance vs low resistance? I’ve run a lot of brands over the years but lately have been running a new to me brand that is hi in resistance, all I have used in the past is low… wondering if there’s a differenc…

This message has been edited. Last edited by: seabass,

I have done testing on the dyno, they were all "race" wires, so I don't know the resistance. But there is a little bit of HP in wires. I have done A-B-A tests and found a max of 5 hp swapping new wires for new wires. To tell you the truth, I was surprised.

quote:

Originally posted by sr4440:
I have done testing on the dyno, they were all "race" wires, so I don't know the resistance. But there is a little bit of HP in wires. I have done A-B-A tests and found a max of 5 hp swapping new wires for new wires. To tell you the truth, I was surprised.

Okay which wires do you like?

Ok, I have a set of firecore50 wires, and they are my "baseline". MSD is exactly the same HP, most others are really close (1 or 2 hp). The worse and I have done this with 3 different sets (I only do this on race engines), the name begins with a T.
I personally prefer the firecore5o because of how it feels when it attaches to the plug, there is no doubt when it seats on the plug.

PS the plug wires are changed after the engine is completely tuned with the customers wires. Please don't ask me "why" because I don't know, and I have tried to find the "lost" hp with small changes in timing and was unsuccessful.

This message has been edited. Last edited by: sr4440,

SR 4440, In you wire testing did you use the same diameter wires in each of the brands..wondering if there were larger diameters of the conducter materials involved..??

quote:

Originally posted by S/S Dart:
SR 4440, In you wire testing did you use the same diameter wires in each of the brands..wondering if there were larger diameters of the conducter materials involved..??

No it wasn't the scientific, I am a dumb@ss dyno driver, the firecore50's are 8.5, the MSD were big 9mm?, the others were all race wire on engines designed to be raced, I would have noticed if they were 7mm wires.

Joe

JR, call Mark at Scott wires.
Very informative.

Many will list a favorite spark plug wire but omit or don’t include the data I want to know.

Take that wire, lay it straight on a table and measure the length. With a meter set to ohms measure the resistance of the wire. What does it measure in resistance per foot?

Joe, have you ever dynode an engine with one ignition control like a 7al2 or lesser, and then switch it to a 7720 Grid to see if any different?

the wires I was running were 4.5kOHm to 6.1kohm...the ones I have on now, Like in the past , are 60-110 ohm

This is interesting. I’ve always preferred the way Taylor wires positively snap onto the spark plug.

quote:

Originally posted by markemark:
Many will list a favorite spark plug wire but omit or don’t include the data I want to know.

Take that wire, lay it straight on a table and measure the length. With a meter set to ohms measure the resistance of the wire. What does it measure in resistance per foot?

Joe, have you ever dynode an engine with one ignition control like a 7al2 or lesser, and then switch it to a 7720 Grid to see if any different?

No, I have never done that test, it would be interesting.

The firecore50 are 50ohms per foot

Pulled motor after Sonoma Nats. I can measure all eight Scott wires and send results..
Hope that helps.

I have been pleased with my Magnecor wires. Horse power difference? Beats me.

I use the Moroso Ultra 40 race wires from Smileys, they are less than half the price and have never had an issue with them. Supposedly 40 Ohms per foot, I have not measured them to verify.

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I use the Moroso Ultra 40 race wires from Smileys, they are less than half the price and have never had an issue with them. Supposedly 40 Ohms per foot, I have not measured them to verify.

I have a set of those Moroso under the header model # 27027 from Smileys. They measure “400” ohms per foot. Nothing wrong with wires that have more resistance per foot to a point.

I prefer Grid 7720 over a 7al2/3 not only for programming, but for the substantial increase in mj output.

quote:

Originally posted by Cashflow:
I have been pleased with my Magnecor wires. Horse power difference? Beats me.

ever ohm them?, thats what I had on it

Scott wires wrapped,
38” = 100.4 longest
22” = 55.9 shortest

So right at .30 /ft?

Sorry for the delay.
Same wires on the TS GTO.

Scott lists their wires as “30 Ohm Per Foot High Inductance Wire and Excellent Noise Suppression Characteristics”. That’s perty strong.

MSD 8.5, Firecore50, Moroso Ultra 40 are all 40- 50 ohms per ft.

I’ve run Accel 300+ (150 ohms per ft) and they were every bit as good performance wise as the MSD 8.5 I replaced them with…. maybe even better as far as noise suppression.

I think given the power of Grid 7720 ignition, using a higher resistive wire (up to 5k ohm total) would produce the same performance results in N/A engines. The benefit of greater noise suppression could possibly be the fix to problems some experience in digital ignition. I could be wrong, but that’s what I think

We’ve always ran Moroso Shielded wires as well as MSD.
So far I’m happy with Marks wires. I’m not seeing any interference with the V500 or the Grid..

I’m always up for trying something better.

quote:

Originally posted by seabass:

quote:

Originally posted by Cashflow:
I have been pleased with my Magnecor wires. Horse power difference? Beats me.

ever ohm them?, thats what I had on it

Magnecor KV85 V5 and R-100 V3 Ignition Cables Specifications- Resistance.....72 ohm per cm, 2.2K ohm per ft. + 10%

Magnecor 8mm ELECTROSPORTS 80 Ignition Lead Specifications- Resistance....98 ohm per cm, 3K ohm per ft. +/- 10%.

Magnecor 7mm ELECTROSPORTS 70 SS Ignition Wire Specifications- Resistance...98.4 ohm per cm, 3K ohm per ft. + 10%