# Spark Plugs - SR **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 4, 2003, 10:48am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132 "2003-10-04T10:48:02Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Souljourner](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Souljourner](https://forums.speedlife.net/u/Souljourner)\ **Post date:** [October 4, 2003, 10:48am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/1 "2003-10-04T10:48:02Z")
Did you know that many stock SRs come with heat range **9** Spark plugs from Japan??! FPR9G from NGK it’s crazy. If you have one of those plugs, make sure you take it off and put in a FPR5G or FPR6G. FPR9G will kill your gas milage because our weather is so cold. ---
**Author:** ![HIBIKI](https://avatars.discourse-cdn.com/v4/letter/h/9de0a6/32.png) [@HIBIKI](https://forums.speedlife.net/u/HIBIKI)\ **Post date:** [October 4, 2003, 12:40pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/2 "2003-10-04T12:40:21Z")
[http://www.ngkspark.com.au/](http://www.ngkspark.com.au/) u can go this ngk site and check for silvia … PFR6B … this is wat NGK gives to Silvia~~ ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 4, 2003, 1:08pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/3 "2003-10-04T13:08:58Z")
heat range 7s are the best IMO for an SR… ---
**Author:** ![oshiet](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@oshiet](https://forums.speedlife.net/u/oshiet)\ **Post date:** [October 6, 2003, 8:46am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/4 "2003-10-06T08:46:37Z")
Actually, the NGK partnumber for Silvia application is PFR6B-9 They recommend a 6 heatrange plug, but you can go to 7 if you drive it harder, or boost higher. The 9 means the plug gap is smaller. ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [October 6, 2003, 9:03am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/5 "2003-10-06T09:03:19Z")
People tell me copper is better on a turbo car beause its sparks colder? Why is that better? And why is a 5 better than a 9 in a turbo car? ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 6, 2003, 9:07am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/6 "2003-10-06T09:07:10Z")
5 is not good, 6 is ok for stock, 7 is ideal for a tuned car like we run. For our application: Engine runs cooler than expected (less power) = sparkplug needs to run hotter to stay in optimal range (5) Engine runs as hot as expected = spark plug range is middle as expected (6) Engine runs hotter = spark plug needs to run cooler to maintain optimum temperature. (7) gap has nothing to do with the heat range of the plug… you may need to change it because of the heat range im not sure, but i’ll i know is that if you’re getting an SR, its cause you want power. 205hp is stock, any SR swap we do in north america will almost always tend to be 230-260hp just from bolt ons (FMIC, Exhaust, DP, Maybe boost control) so a colder plug is reccomended. Even for a stock car that takes a beating. ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [October 6, 2003, 9:10am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/7 "2003-10-06T09:10:21Z")
So a 7 is colder than a 5? ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 6, 2003, 9:11am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/8 "2003-10-06T09:11:58Z")
for NGK yes. they reverse their system ---
**Author:** ![oshiet](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@oshiet](https://forums.speedlife.net/u/oshiet)\ **Post date:** [October 6, 2003, 9:16am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/9 "2003-10-06T09:16:00Z")
Copper is cheap. Most enthusiest would rather change the plugs more often rather than spend 4X the price. Just to see their expensive plugs foul out anyways. ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [October 6, 2003, 9:22am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/10 "2003-10-06T09:22:50Z")
So Sasha for us Canuks what plug do you recomend for daily driving a Stock/Mildly Tuned SR and For beating the ship outta it on the track? ---
**Author:** ![oshiet](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@oshiet](https://forums.speedlife.net/u/oshiet)\ **Post date:** [October 6, 2003, 9:24am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/11 "2003-10-06T09:24:58Z")
Use Iridium 6’s for daily driving, and swap in a set of 7 coppers for trackuse. ---
**Author:** ![Souljourner](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Souljourner](https://forums.speedlife.net/u/Souljourner)\ **Post date:** [October 6, 2003, 10:52am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/12 "2003-10-06T10:52:11Z")
they’re hell expensive… $20 for ONE spark plug… you gotta be kidding. ---
**Author:** ![iQuAGoD](https://avatars.discourse-cdn.com/v4/letter/i/f05b48/32.png) [@iQuAGoD](https://forums.speedlife.net/u/iQuAGoD)\ **Post date:** [October 6, 2003, 1:37pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/13 "2003-10-06T13:37:42Z")
just use ngk g power… i use heat range 7 ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 6, 2003, 1:41pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/14 "2003-10-06T13:41:44Z")
i paid 25$ for a set of 7s for my MR2, same plugs as on an SR. they are mint. My car wouldn’t hold an idle before with my fouled pos plugs, after beating these they are still good, however they dont like being driven too slow, esspecially when the engine is cold, however i dont think that is just the plugs. ---
**Author:** ![jjm\_240sx](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@jjm\_240sx](https://forums.speedlife.net/u/jjm_240sx)\ **Post date:** [October 6, 2003, 4:44pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/15 "2003-10-06T16:44:07Z")
were are you getting your 7’s from. CT dosnt have them. ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 6, 2003, 4:55pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/16 "2003-10-06T16:55:20Z")
gottta order from nissan/toyota 🙂 ---
**Author:** ![HIBIKI](https://avatars.discourse-cdn.com/v4/letter/h/9de0a6/32.png) [@HIBIKI](https://forums.speedlife.net/u/HIBIKI)\ **Post date:** [October 6, 2003, 10:33pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/17 "2003-10-06T22:33:16Z")
does nissan and toyota carry iridium plugs? ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [October 7, 2003, 9:47am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/18 "2003-10-07T09:47:10Z")
Yes and so does CT ---
**Author:** ![Sasha\_SG](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/sasha_sg/32/5477_2.png) [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)\ **Post date:** [October 7, 2003, 11:16am UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/19 "2003-10-07T11:16:45Z")
i wouldn’t use irridium on a turbo car… my personal preferance… NGK Rs ---
**Author:** ![HIBIKI](https://avatars.discourse-cdn.com/v4/letter/h/9de0a6/32.png) [@HIBIKI](https://forums.speedlife.net/u/HIBIKI)\ **Post date:** [October 7, 2003, 12:02pm UTC](https://forums.speedlife.net/t/spark-plugs-sr/80132/20 "2003-10-07T12:02:58Z")
> [@Sasha](#): > > i wouldn’t use irridium on a turbo car… my personal preferance… NGK Rs why not iridium? or lazer platium? [Next page](https://forums.speedlife.net/t/spark-plugs-sr/80132.md?page=2)