gapping my plugs for my application - SRT Forums

intriguing · 11-28-2009, 06:38 AM

I am an SRT-4 noob, just bought the car with 50k from the original owner this week. The plugs have not been done yet. I went and bought some NGK iridiums like a few friends suggested who own SRT's. Is this a good choice for d/d and what should they be gapped like for a stg 1, 3inch turbo back, MBC set to 17lbs and a cold air intake? Keep in mind I'm running them in Michigan weather and I need them to be daily driven and have very cold starts.

Any help would be appreciated!

**NachO_SRT** · 11-28-2009, 06:58 AM

17 PSI - Stock Turbo I'd start with .040 - stock is .050 - Iridiums are a pain to gap so be careful -

You will need a little trial and error, get a warm day (like today) and do the .040 gap and go run it any spark blow out? (you will feel it under 12+ PSI of boost it's violent) If so back to the garage, use a box fan cool it off ASAP and gap down another .002 to .038 - repete until no issues -

No lower then .022 on the iridiums!!!

NachO

intriguing · 11-28-2009, 07:16 AM

are the iridiums good plugs? or should i stick with the champions?

indian srt-4 · 11-28-2009, 07:39 AM

i use the stock champions with no problems my mods are similar to yours. i gap mine at .45

**NachO_SRT** · 11-28-2009, 08:17 AM

I loved the Copper Champions or the NGK's in Copper - Cheap and worked VERY well.

I did not require the Iridiums until I stepped up the turbo - I'm still on a bone stock ign system - except the plugs - Stock Mopar coil and wires.

NachO

coors · 11-28-2009, 08:22 AM

Quote: Originally Posted by intriguing

are the iridiums good plugs? or should i stick with the champions?

ive allways used champion 3570s i like them and the price

mine are gapped a .032 on 25psi

intriguing · 11-28-2009, 10:47 PM

alright, I got some advice from local guys who d/d their SRT-4's during the cold michigan winters.. they say to stick with V-powers and that iridiums are not useful unless boosting 20 lbs or more and are rougher in the winter on freezing starts.

11-28-2009, 06:38 AM	#1 (permalink)
intriguing SRTforums Member Join Date: Sep 2009 Member Number: 74958 Location: Motown Posts: 203	gapping my plugs for my application I am an SRT-4 noob, just bought the car with 50k from the original owner this week. The plugs have not been done yet. I went and bought some NGK iridiums like a few friends suggested who own SRT's. Is this a good choice for d/d and what should they be gapped like for a stg 1, 3inch turbo back, MBC set to 17lbs and a cold air intake? Keep in mind I'm running them in Michigan weather and I need them to be daily driven and have very cold starts. Any help would be appreciated!

11-28-2009, 06:58 AM	#2 (permalink)
NachO_SRT Premium Member (Lifetime) Join Date: Mar 2004 Member Number: 8662 Location: O.P. Kansas Posts: 2,851	17 PSI - Stock Turbo I'd start with .040 - stock is .050 - Iridiums are a pain to gap so be careful - You will need a little trial and error, get a warm day (like today) and do the .040 gap and go run it any spark blow out? (you will feel it under 12+ PSI of boost it's violent) If so back to the garage, use a box fan cool it off ASAP and gap down another .002 to .038 - repete until no issues - No lower then .022 on the iridiums!!! NachO __________________ VOTE FOR ME! AUG 2010 SRT of the Month! http://www.srtforums.com/forums/f389...thread-576826/ DD -09 STi \| Track Car. 2004 E-blue; Mods and pics: CLICK S259@ 25psi:614/567 -6/10, E85 - Meanblueberry.

11-28-2009, 07:39 AM	#4 (permalink)
indian srt-4 SRTforums Member Join Date: Apr 2006 Member Number: 40634 Location: Gainesville Posts: 4,018	i use the stock champions with no problems my mods are similar to yours. i gap mine at .45 __________________ Mods: TITLE IN HAND

11-28-2009, 08:17 AM	#5 (permalink)
NachO_SRT Premium Member (Lifetime) Join Date: Mar 2004 Member Number: 8662 Location: O.P. Kansas Posts: 2,851	I loved the Copper Champions or the NGK's in Copper - Cheap and worked VERY well. I did not require the Iridiums until I stepped up the turbo - I'm still on a bone stock ign system - except the plugs - Stock Mopar coil and wires. NachO __________________ VOTE FOR ME! AUG 2010 SRT of the Month! http://www.srtforums.com/forums/f389...thread-576826/ DD -09 STi \| Track Car. 2004 E-blue; Mods and pics: CLICK S259@ 25psi:614/567 -6/10, E85 - Meanblueberry.

11-28-2009, 08:22 AM	#6 (permalink)
coors SRTforums Member Join Date: Jun 2006 Member Number: 43166 Location: sanangelo,texas Posts: 15,678	Quote: Originally Posted by intriguing are the iridiums good plugs? or should i stick with the champions? ive allways used champion 3570s i like them and the price mine are gapped a .032 on 25psi __________________ DEVILSOWN 405-470-4356 any questions pm me

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11-28-2009, 07:16 AM	#3 (permalink)
intriguing SRTforums Member Join Date: Sep 2009 Member Number: 74958 Location: Motown Posts: 203	are the iridiums good plugs? or should i stick with the champions?

11-28-2009, 10:47 PM	#7 (permalink)
intriguing SRTforums Member Join Date: Sep 2009 Member Number: 74958 Location: Motown Posts: 203	alright, I got some advice from local guys who d/d their SRT-4's during the cold michigan winters.. they say to stick with V-powers and that iridiums are not useful unless boosting 20 lbs or more and are rougher in the winter on freezing starts.

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