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IBM camaro 05-15-2013 03:46 AM

Spark plugs on FI
 
I'm getting close to 64k miles on my car and I'm gonna get we spark plugs right now I'm full bolt on with the IPF supercharger kit what kinda of gap and brand do I need? Same or something different?
FI experts please help thanks

Can't_C_Me 05-15-2013 07:45 AM

NGK LTR7IX-11 $8.99 or Autolite XP5263 $5.99-$6.99 (also been seen to have a $2 mail in rebate). I've used both and like the Autolite better and their easy to find while being cheaper. Both gapped at .032 for FI sometimes a retune maybe needed. So check the gap on your current plugs and go with that if your car is running good now at that gap for your tune.

hunterv6 05-15-2013 07:57 AM

Quote:

Originally Posted by Can't_C_Me (Post 6545994)
NGK LTR7IX-11 $8.99 or Autolite XP5263 $5.99-$6.99 (also been seen to have a $2 mail in rebate). I've used both and like the Autolite better and their easy to find while being cheaper. Both gapped at .032 for FI sometimes a retune maybe needed. So check the gap on your current plugs and go with that if your car is running good now at that gap for your tune.

+1

IBM camaro 05-15-2013 08:25 AM

Thanks guys :)

PoorMansCamaro 05-15-2013 08:44 AM

Quote:

Originally Posted by Can't_C_Me (Post 6545994)
NGK LTR7IX-11 $8.99 or Autolite XP5263 $5.99-$6.99 (also been seen to have a $2 mail in rebate). I've used both and like the Autolite better and their easy to find while being cheaper. Both gapped at .032 for FI sometimes a retune maybe needed. So check the gap on your current plugs and go with that if your car is running good now at that gap for your tune.

i'm hearing NGK LTR7IX-11 iridium is not good for FI...or maybe it was just for nitrous that it's not good for. :iono:

sycraft 05-15-2013 10:30 AM

Quote:

Originally Posted by NOT URSS (Post 6546549)
what about ZR1 LS9 Plugs?

We are talking V6 engines here..

Mine are gapped at .035

NOT URSS 05-15-2013 10:42 AM

lol i see that now

Ventmaster 05-15-2013 12:10 PM

These are the recommendations I got from Jesse- approved by Arno for use with the IPF S/C kit:

Listed below are the 2 replacement plugs that are 1 heat range colder than stock:

Denso Iridium plug: 5340 = ITV22
14mm Thread Size,
25mm (.984") Reach,
5/8" (16mm) Hex Size,
.031" (0.8mm) Gap
Heat Range 22 (one step colder)

----------------------------------------------------------
NGK Spark Plugs #739-LTR7IX-11
Iridium IX Spark Plug
14mm Thread Size,
25mm (.984") Reach,
5/8" (16mm) Hex Size,
.044" Gap stock Need to Gap @ .031
Heat Range 7 (one step colder)

I've not had the opportunity to personally experience either yet...
so can't offer any other insight.:pop2:

Nutbutt 05-15-2013 12:27 PM

I am running the NGK at the specs Arno recommended and the car is running great !

BaylorCamaro 05-15-2013 02:34 PM

Quote:

Originally Posted by Ventmaster (Post 6547050)
----------------------------------------------------------
NGK Spark Plugs #739-LTR7IX-11
Iridium IX Spark Plug
14mm Thread Size,
25mm (.984") Reach,
5/8" (16mm) Hex Size,
.044" Gap stock Need to Gap @ .031
Heat Range 7 (one step colder)

I've not had the opportunity to personally experience either yet...
so can't offer any other insight.:pop2:

Dang that is a tight gap!

I've been running the NGK's first at 0.037 then everyone talked about how the gap should be around 0.032. I closed the gap to around 0.034-.035 and at seemed to stumble a little bit at idle I open it up to 0.036 and fixed it but I get a stumble every now and then. I actually just had a misfire on my number 6 cylinder two days ago. From all the messing around I've been doing with my tune I might have fouled up the plugs.

I just ordered new NGK's and will mess around with it this weekend.

I had discussed with Vince if I needed to change around the tune for a smaller gap and he told me to use whatever gap "works." So I'm not sure wtf I need to do, tbh. lol.

I think for the IPF guys it is pretty well understood that 0.032 is the standard.

Vader2011v6 05-15-2013 08:38 PM

What is the stock gapping and what kind of plugs are stock? I've not done anything to my spark plugs since I got the kit. I'm running all stock specs

JohnnyBfromPeoria 05-15-2013 08:42 PM

Me too, Vader. I have a replacement set sitting on the table, but I just never get around to changing them out.

John B.

Vader2011v6 05-15-2013 09:03 PM

Quote:

Originally Posted by JohnnyBfromPeoria (Post 6549105)
Me too, Vader. I have a replacement set sitting on the table, but I just never get around to changing them out.

John B.

When is it recommended to change them with the supercharger. I have 35000 miles on my car

JohnnyBfromPeoria 05-15-2013 09:06 PM

Any time would be fine, really. They're cheap.

John B.

iceman5730 05-15-2013 09:46 PM

IPF is recommending the NGKs LTR7IX-11 , or Denso 5340 ITV22, both are 1 step cooler than stock and both need a 0.031 gap with their S/C kit. Factory setting .044
Ihad installed the NGK about 2 k ago and does make a difference in performance Great Plugs :thumb:

GPCS 05-15-2013 10:26 PM

Quote:

Originally Posted by BaylorCamaro (Post 6547623)
told me to use whatever gap "works." So I'm not sure wtf I need to do

Quote:

Originally Posted by iceman5730 (Post 6549428)
both are 1 step cooler than stock and both need a 0.031 gap with their S/C kit. Factory setting .044



on ANY spark plugs if you gap them smaller they will run colder and if they are gapped larger, they will run hotter at the risk of a "spark blow out" <-google , which is basically a spark plug induced misfire

i would recommend running the largest spark plug gap you can without misfiring of any kind, and no larger of a gap than stock

while checking the spark plug gaps and then regapping for uniformity is a good idea (new spark plugs as they come in the box may have varying spark plug gaps), the spark gap should also be adjusted based on the power output of the motor, with induced misfire as the determining factor, and only as the need arises, go to either a smaller spark plug gap or a colder range plug; both of which if taken too far will also cause spark plug fouling

the OEM acdelco spark plugs are rated for 100k+ miles, of all of the plugs listed in this thread, and especially regapped, you're looking at a third or half at best of that lifespan


i would recommend for the LFX motors:

for anything under 300whp, the OEM acdelco plugs with the stock spark plug gap, with replacement at 50k miles or less

for anything between 300-350whp, the OEM acdelco plugs with a 0.040 gap, with replacement at 30k miles or less

for anything between 350-400whp, the OEM acdelco plugs with a 0.037 gap, with replacement at 20k miles or less

for anything between 400-450whp, the OEM acdelco plugs with a 0.033 gap, with replacement at 10k miles or less

and for anything above 500whp, a denso ITV22, at 0.030-0.032 gap, with replacement at 10k miles or less


if you gap your spark plugs too small or use too cold of a heat range on your spark plugs, you WILL lose power at part throttle and in extreme cases, cause idling problems such as stumbling or poor idle quality

smaller spark plug gaps for the sake of smaller spark plug gaps will not improve performance, and will negatively affect combustion efficiency, which you want as efficient as possible, for better power output, less misfiring, better fuel efficiency, and less carbon buildup in places you don't want carbon buildup

BaylorCamaro 05-16-2013 08:21 AM

Quote:

Originally Posted by GPCS (Post 6549598)
if you gap your spark plugs too small or use too cold of a heat range on your spark plugs, you WILL lose power at part throttle and in extreme cases, cause idling problems such as stumbling or poor idle quality

smaller spark plug gaps for the sake of smaller spark plug gaps will not improve performance, and will negatively affect combustion efficiency, which you want as efficient as possible, for better power output, less misfiring, better fuel efficiency, and less carbon buildup in places you don't want carbon buildup

Interesting. Admittedly my knowledge on the spark plug and different gaps is minimal. I am currently at a 0.035 gap and my idle seems like it wants to stumble & has poor quality like you have suggested. I also had a random misfire on cylinder #6 the other day when I was leaving idle and had part throttle. What is more interesting is I just spoke with Vince and his suggestion (like IPF) is to gap down to 0.032. I suppose I can test our a larger gap and see if I have spark blow out or not.

HBMike 05-16-2013 12:00 PM

Denso Iridium plug: 5340 = ITV22

.8mm gap

car runs great

https://fbcdn-sphotos-h-a.akamaihd.n...79591032_o.jpg

V6owner 05-16-2013 12:37 PM

Wow that is a BADASS mother Fuking picture

PoorMansCamaro 05-16-2013 01:00 PM

Yeah it is!!!! Holy chit!:confused0068:

Ventmaster 05-16-2013 03:03 PM

Denso recommends a 30K mile replacement on the 5340-ITV22, but mine did require a re-gap down to 0.031 (0.8mm). :thumb:

Vader2011v6 05-24-2013 01:54 AM

Couldn't find the denzos but was able to get some NGKs. Did the regap to .032. I will get to see tomorrow if it helps out.

BaylorCamaro 07-19-2013 10:11 AM

As an update, before I got rid of my V6 I opened up my gap to about .038 and my idle got significantly better and I still didn't have spark blowout. So my point is what works for one tune or car may not for another..

wutshotDJroomba 10-20-2013 05:09 PM

Quote:

Originally Posted by HBMike (Post 6551256)
Denso Iridium plug: 5340 = ITV22

.8mm gap

car runs great

https://fbcdn-sphotos-h-a.akamaihd.n...79591032_o.jpg

hah, bought that magazine the other day, the article on your Supercharged RS has inspired my FI build.

Vader2011v6 10-23-2013 01:51 AM

Quote:

Originally Posted by wutshotDJroomba (Post 7109999)
hah, bought that magazine the other day, the article on your Supercharged RS has inspired my FI build.

What magazine is it? I would like to read up on it as well.sweet picture.


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