ok.. iv been using RE14MCC5 champion SRT4 plugs gapped to .35 it worked flawless for the past years. well i went to the track the other weekend with almost a half tank of c116 and 110 mixed. i broke before i got a chance to run it on higher then 15psi.
anyhoo car is back on the road and i had a bit of race fuel left in the tank... tried it on 20psi and it started miss firing. bad... it was NOT detonation. talked to brad and aaron at hahn and tried some things. added fuel.. 10.3-10.4 at WOT (pig rich i know) still the same.. miss fires as soon as i change to 20psi.
so i have high octane fuel, running rich and it still missfires. im going to go with the RE14MCC5 copper plugs again with a recomended gap of .30 see what happens then maybe try .28
my main question is...
RE14MCC5 champion stock length copper plug gapped at .30-.35
or
irridium NGK LZTR5A-13 stock length? gapped at what?
which would best be used for a higher boost level (20psi +)
id like to know if hahn is still using that plug now that their making 513fwhp. and what suncavi was runnign as well
http://www.myspace.com/15102113
12.5@116 2.0 60ft
ok quick thing. i just checked sun cavis profile..
NGK LTR7IX-11 2 step colder plugs
irridium NGK LZTR5A-13
whats the difference between the 2 plugs?
http://www.myspace.com/15102113
12.5@116 2.0 60ft
i had alot of misfire on the srt plugs, went to the ones suncavi had and loved them
i ran the ones suncavi has too
LE61T PTE6262 Powered 
Quote:
NGK LTR7IX-11 2 step colder plugs
irridium NGK LZTR5A-13
so are these stock length or longer?
whats your guys gap at?
http://www.myspace.com/15102113
12.5@116 2.0 60ft
mine were at .35 and they are stock length.
if your not already running an msd do it, I dont care what anyone tells you the stock ignition is not good for running 20psi
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Copper, copper, copper. The SRT4 plugs have destroyed more motors here than I'd like to count. If you're still running stock ignition, you're going to have to turn the gap down, maybe say .025" for 20-25psi.
fortune cookie say: better a delay than a disaster
Quote:
Copper, copper, copper. The SRT4 plugs have destroyed more motors here than I'd like to count.
whats wrong?
guess ill order the NGK LTR7IX-11 on monday
http://www.myspace.com/15102113
12.5@116 2.0 60ft
John H [CavalierKid wrote:]Quote:
Copper, copper, copper. The SRT4 plugs have destroyed more motors here than I'd like to count.
whats wrong?
I'm obviously not an ECO expert, but the SRT-4 plugs are reportedly too long, which leaves lots of thread exposed in the chamber, which leads to pre-ignition.
fortune cookie say: better a delay than a disaster
OHV notec wrote:Copper, copper, copper. The SRT4 plugs have destroyed more motors here than I'd like to count. If you're still running stock ignition, you're going to have to turn the gap down, maybe say .025" for 20-25psi.
I know I am a confirmed case of that. About a year and a half ago I ate ring land #2 after having thoes plugs in for only a week. So since then I'm back to autolite 103's I know their crap, and a wee bit to short, but at least I can get the car to run safely with them.
May have to try the NGK LTR7IX-11
<img src=http://home.comcast.net/~richnj221/smiley.gif>
ummm, the srt-4 plugs are the correct length. I ran them for damn near 6 months on 12 psi on a stock motor. The autolites are more then a wee bit short, hypsy posted a thread on them. They are ridiculously too short.
LE61T PTE6262 Powered
Rodimus Prime wrote:if your not already running an msd do it, I dont care what anyone tells you the stock ignition is not good for running 20psi
The stock ignition is just fine for running 20+ PSI. Using SRT-4 plugs with a gap near .020, we were able to run 28 PSI and make over 400 WHP with the stock ignition.
Street-Legal 2003 Sunfire 10.58 @ 139 MPH
Adam Hahn wrote:Rodimus Prime wrote:if your not already running an msd do it, I dont care what anyone tells you the stock ignition is not good for running 20psi
The stock ignition is just fine for running 20+ PSI. Using SRT-4 plugs with a gap near .020, we were able to run 28 PSI and make over 400 WHP with the stock ignition.
adam, you never got back to me. did you talk to your dad about the exact gap and the portfueler cells?
got the new srt4 plugs and i ordered NGK LTR7IX-11 as well. also picked up new insulators.
http://www.myspace.com/15102113
12.5@116 2.0 60ft
Sure you can use the stock ignition but your giving up a ton of efficiency not having it
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
QBE (The Boosted One) wrote:ummm, the srt-4 plugs are the correct length. I ran them for damn near 6 months on 12 psi on a stock motor. The autolites are more then a wee bit short, hypsy posted a thread on them. They are ridiculously too short.
Phil there was a pic of them in a spare head somewhere showing that they were indeed just a tad to long.
Exterminator wrote:OHV notec wrote:Copper, copper, copper. The SRT4 plugs have destroyed more motors here than I'd like to count. If you're still running stock ignition, you're going to have to turn the gap down, maybe say .025" for 20-25psi.
I know I am a confirmed case of that. About a year and a half ago I ate ring land #2 after having thoes plugs in for only a week. So since then I'm back to autolite 103's I know their crap, and a wee bit to short, but at least I can get the car to run safely with them.
May have to try the NGK LTR7IX-11
was that on your stock piston or wiesco? every eco thats blown, it was stock and was a ringland on either piston #2 or #3. airtonics is the only exception as he did throw a rod. his was an 02 though. all the rest were 03+
http://www.myspace.com/15102113
12.5@116 2.0 60ft
Rodimus Prime wrote:Sure you can use the stock ignition but your giving up a ton of efficiency not having it
There is no real way to prove that, and if I can save over $700 in both buying the product and the time to put it on, then I think its well worth it.
Street-Legal 2003 Sunfire 10.58 @ 139 MPH
Phlatcav wrote:QBE (The Boosted One) wrote:ummm, the srt-4 plugs are the correct length. I ran them for damn near 6 months on 12 psi on a stock motor. The autolites are more then a wee bit short, hypsy posted a thread on them. They are ridiculously too short.
Phil there was a pic of them in a spare head somewhere showing that they were indeed just a tad to long.
can you dig that up for me? Cause when I had them in my spare head they were right on
LE61T PTE6262 Powered
Adam Hahn wrote:Rodimus Prime wrote:if your not already running an msd do it, I dont care what anyone tells you the stock ignition is not good for running 20psi
The stock ignition is just fine for running 20+ PSI. Using SRT-4 plugs with a gap near .020, we were able to run 28 PSI and make over 400 WHP with the stock ignition.
exactly..i was going to say i ran a tad over 23psi on stock ignition and regapped delco's..no problem, well i only drove it for a month with a rough tune and constantly at wot
Built&Boosted moar
04 Cavalier Turbo r.i.p my baby
2nd place 2009 GM tuner bash qwick 8--holla
Well if the stock ignition is so great why arent any of the GM race teams using it?
They all run msd and if you plan on doing any street driving it helps out gas mileage big time, its been proven on this motor for years, ask anyone thats running one
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
Rodimus Prime wrote:Well if the stock ignition is so great why arent any of the GM race teams using it?
They all run msd and if you plan on doing any street driving it helps out gas mileage big time, its been proven on this motor for years, ask anyone thats running one
Because they aren't worried about saving 700 dollars and have unlimited budget?
___________________________________________________________________
Mitsu TD06-20g |3" Downpipe w/ Cutout | 61mm Bored TB |
HP Tuners | Innovate WB02 | Spec Stage 3 | TurboTech Upper | Full Addco Sways | Sportlines & Yellows |
BlackEco wrote:Rodimus Prime wrote:Well if the stock ignition is so great why arent any of the GM race teams using it?
They all run msd and if you plan on doing any street driving it helps out gas mileage big time, its been proven on this motor for years, ask anyone thats running one
Because they aren't worried about saving 700 dollars and have unlimited budget?
you'd end up saving that in 1 year on fuel with an MSD.
I know at 12 psi when I went to MSD I gained 7 - 8 mpg.
LE61T PTE6262 Powered
Rodimus Prime wrote:Well if the stock ignition is so great why arent any of the GM race teams using it?
They all run msd and if you plan on doing any street driving it helps out gas mileage big time, its been proven on this motor for years, ask anyone thats running one
They also run distributors, not much point in a stock DIS setup at that point...not to mention they are obviously well over 20psi
QBE (The Boosted One) wrote:BlackEco wrote:Rodimus Prime wrote:Well if the stock ignition is so great why arent any of the GM race teams using it?
They all run msd and if you plan on doing any street driving it helps out gas mileage big time, its been proven on this motor for years, ask anyone thats running one
Because they aren't worried about saving 700 dollars and have unlimited budget?
you'd end up saving that in 1 year on fuel with an MSD.
What? MSD pays for your gas? I don't think I even spend $700/yr on gas lol.
I'm not knocking MSD by any means, I'm running full programmable MSD on my car.
It's just that it's not REQUIRED simply because someone is running large boost.
fortune cookie say: better a delay than a disaster
