Spark plug wire size

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May 10, 2005 | 05:29 PM

ajbutowicz

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Car: 1991 Camaro RS

Engine: Stock 305 TBI

Transmission: Stock

Spark plug wire size

On a stock ignition driving bolt ons, do 8.5 mm wires really help that much over stock 8 mm ones?

May 10, 2005 | 06:00 PM

'Shifter

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From: Tucson, Arizona

Car: 87 Z-28

Engine: A worn-out 305

Transmission: T-5, until it dies

Not without more voltage from a hotter coil, but they sure look
cooler.....

May 10, 2005 | 06:33 PM

Token

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From: Toledo, OH

Car: 1992 Firebird

Engine: forged 357

Transmission: 700r4, 2200-2400 stall, vette servo

Axle/Gears: stock pegleg 2.73 drum (temp)

OEM is either 6mm or 7mm

but no, you won't notice any difference. however, if it's time to replace them, it can't hurt to spend the extra $5 and get a bigger set.

May 10, 2005 | 07:00 PM

ShiftyCapone

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From: Cincinnati, OH

Car: '90 RS

Engine: 377 LSX

Transmission: Magnum T56

You may notice a slight increase in your MPG but that is about it. One of the main reasons for aftermarket wires is for radio interference supression.

May 11, 2005 | 02:20 AM

Red Devil

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From: E.B.F. TN

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No, you won't.

May 11, 2005 | 02:42 AM

ajbutowicz

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Car: 1991 Camaro RS

Engine: Stock 305 TBI

Transmission: Stock

Got accel 8 mm ones.

May 11, 2005 | 10:31 AM

cormyr

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From: Maine

Car: 89 Formula 350 WS6

Engine: 383 miniram

Transmission: 700R4

i measured the impedence on a stock wire and again on an accel 8.8mm. the stock wire had almost ten times the resistance. is there a difference between stock and 8+mm wires? without a doubt. will you notice any difference between 8mm and 8.5mm. very doubtful.