spark plugs

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
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Sr20detNESS
Posts: 82
Joined: Mon Aug 01, 2005 3:26 am
Car: '92 240sx fastback redtop sr20det

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what are the best spark plugs I could use for my sr20det redtop. Its an all stock sr motor. Right now I have Denso 1k20's...I dont think they are the best so which ones are and what should the heat range and gap be. And also would the heat range change if i were to make modifications to my motor?


180fan
Posts: 7799
Joined: Sat Dec 14, 2002 12:16 pm
Car: 89 fastback

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NGK go with stock heat range if your motor is within 100hp of stock. Narrower the gap for more boost. I have NGK iridiums gapped to stock with stock heat range.

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Sr20detNESS
Posts: 82
Joined: Mon Aug 01, 2005 3:26 am
Car: '92 240sx fastback redtop sr20det

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alright sounds good...but what would the stock heat range be, 6? and the gap

ILikeMy240sx
Posts: 5358
Joined: Fri May 28, 2004 2:49 pm
Car: SR Power

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180fan wrote:NGK go with stock heat range if your motor is within 100hp of stock. Narrower the gap for more boost. I have NGK iridiums gapped to stock with stock heat range.
just wondering... how much boost are you running?

I got iridium except one step colder (7) and not too sure if I should leave the gap alone or decrease it a little.

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9240sx
Posts: 2676
Joined: Wed Dec 10, 2003 4:06 am
Car: What i believe to be the cleanest s13 in the world.

SR20DET + RS*R-Apexi-Nismo-Trust-HKS= 100% pure love
Location: New Mexico

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Stock heat range is 6.Stock plug gap is .36

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got2b240
Posts: 475
Joined: Tue Jul 13, 2004 4:50 am
Car: 91' RPS13 = GT28R, 525cc, Z32 Mafs & SAFC, Blitz EXST & FMIC, Silvia VLSD
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dont listen to them lol just kidding......

best plug IMO is the plain and simple ...forget the fancy stuff

go witht he NGK BKR7E Copper Plug!gap it to .30 and have a blast!

Drty_Jrze
Posts: 85
Joined: Tue Feb 17, 2004 4:07 am

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How often should you change the plugs?


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