Differences in spark plugs?
Thread Starter
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
Likes: 37
From: Woodlands TX
Differences in spark plugs?
I have an 07 Z51 A6 DD and have been using Brisk spark plugs "part number GOR15YTE-3" for a while. Over all they seem to work well. I was just wondering if anybody in the forum has seen a difference in performance; such as throttle response, hp/tq loss or gain, or smoother idle when changing to a different type of plug. Also does anybody on here use Brisk spark plugs, beside myself?
Thanks.
Thanks.
Drifting
Joined: Apr 2006
Posts: 1,276
Likes: 5
From: Ambler Pa.
I have an 07 Z51 A6 DD and have been using Brisk spark plugs "part number GOR15YTE-3" for a while. Over all they seem to work well. I was just wondering if anybody in the forum has seen a difference in performance; such as throttle response, hp/tq loss or gain, or smoother idle when changing to a different type of plug. Also does anybody on here use Brisk spark plugs, beside myself?
Thanks.
Thanks.
Track Junky
Joined: Jun 2007
Posts: 4,075
Likes: 36
From: Orlando Area
Tech Contributor
I just put the TR6's in my H/C full bolt on car and it does seem to run a bit smoother, even at idle. I won't find about the amount of timing I can for a couple weeks when I go back in for a tune.
Tech Contributor
Joined: Oct 1999
Posts: 41,063
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From: Charlotte, NC (formerly Endicott, NY)
Haven't seen any need to change the plugs. My 03 had 43K miles on it when I sold it and it was running strong, still getting the same gas mileage it got with 5K miles and I saw no need to change. The 08 has 23K miles on the original plugs and I don't see any need to change those either. Still runs like a raped ape and gets great gas mileage. Don't fix it if it ain't broke.
Bill
Bill
Track Junky
Joined: Jun 2007
Posts: 4,075
Likes: 36
From: Orlando Area
Tech Contributor
I guess it depends on your current and/or future goals. I ran stock plugs with great results at 476 rwhp, H/C and all bolt ons except a FAST. In my recent research, it seems that the NGK plusg may work better with higher Hp cars. if yoou plan on staying relatively stock, the AC Delco plugs will do just fine. I only changed due to potential performance gains and/or reliability. I read somewhere that you need to go one step colder for every 100 Hp higher than stock you are. But again, it could just be an old wives tale...
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Haven't seen any need to change the plugs. My 03 had 43K miles on it when I sold it and it was running strong, still getting the same gas mileage it got with 5K miles and I saw no need to change. The 08 has 23K miles on the original plugs and I don't see any need to change those either. Still runs like a raped ape and gets great gas mileage. Don't fix it if it ain't broke.
Bill
Bill
The OP is in a different situation than that.
Will work for HPDE time.
Joined: May 1999
Posts: 2,560
Likes: 7
From: Orlando FL
I guess it depends on your current and/or future goals. I ran stock plugs with great results at 476 rwhp, H/C and all bolt ons except a FAST. In my recent research, it seems that the NGK plusg may work better with higher Hp cars. if yoou plan on staying relatively stock, the AC Delco plugs will do just fine. I only changed due to potential performance gains and/or reliability. I read somewhere that you need to go one step colder for every 100 Hp higher than stock you are. But again, it could just be an old wives tale...
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Track Junky
Joined: Jun 2007
Posts: 4,075
Likes: 36
From: Orlando Area
Tech Contributor
Yeah, I was very reluctant to change myself based on some of the posts I have read. The car seems to pull more linear but I wont have any data until the dyno tunel. I kept my AC Delco plugs and will bring them to the tune just in case
. Heck, there's only about 1000 miles on them...The reading I did included opinions that the copper worked better for overall power. The debate came with a lower heat range. Some say yes, some say no. I can buy into the fact that the sharply pointed iridium tips of the AC Delcos could potentially retain more heat leading to detonation, so the switch to copper was the choice I made. The colder heat range was supported by some tuner recommendations on several other forums due to allowing more timing. But again, if the dyno doesn't show that, I will gladly switch back.
On a seperate note, my '95 F-body ran great with NGK plugs and was relatively stock - even at 105k when I got rid of it.
Last edited by taken19; Jul 28, 2011 at 08:58 PM. Reason: because I can't type worth a sh!t.
Drifting
Joined: Apr 2006
Posts: 1,276
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From: Ambler Pa.
My stock plugs ran fine, but I could not add any wot timing without getting knock retard. By using a copper plug, one heat range colder, I can add 1.5 to 2.0 degrees timing, no knock retard, throttle response is better. But to reiterate, at stock timing , I had no problems with the stock plugs. Also if you live in an area that does not have 93 octane, The colder, copper plugs buys you a little margin for staying out of K/R. Either way , we are still talking about a slight difference.
Premium Supporting Vendor
Joined: Oct 2005
Posts: 13,975
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From: Clinton Township MI
C7 of Year Finalist (track prepared) 2019
Our recommendation is Denso Iridium spark plugs. IT20s are identical to LS7 plugs and they can be purchased cheaper in the AC Delco box. For racing or boosted applications we use Denso IT22s.
Thread Starter
Tolero Apto Victum
Joined: Jul 2007
Posts: 9,669
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From: Woodlands TX
http://www.densoiridium.com/find_part.php
Former Vendor
Joined: Apr 2006
Posts: 2,470
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From: Portland OR
St. Jude Donor '10-'11-'12
NGK are about the least expensive most effective plug, the expensive plugs last longer.. the car probably came with an ac delco 41-110...
you drop heat range for every 100 added hp is the general rule..
whether you spend $14 for a set or $114 for as set of plugs is up to you... copper based will not last as long but are 1/10 the cost.. as far as performance goes I have not seen a true independent test done yet and show improved gas mileage from one over another.. so to me its all about.. maintenance and personal preference
Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
What is the advantage/gain to switch from TR6 to IT22 on my 418ci 664hp please?
Christian
Will work for HPDE time.
Joined: May 1999
Posts: 2,560
Likes: 7
From: Orlando FL
Ronnie, thanks for the input. Hearing that another member thinks sililarly makes me feel more comfortable. Have you had any problems whatsoever with your TR6's?
Yeah, I was very reluctant to change myself based on some of the posts I have read. The car seems to pull more linear but I wont have any data until the dyno tunel. I kept my AC Delco plugs and will bring them to the tune just in case. Heck, there's only about 1000 miles on them...
The reading I did included opinions that the copper worked better for overall power. The debate came with a lower heat range. Some say yes, some say no. I can buy into the fact that the sharply pointed iridium tips of the AC Delcos could potentially retain more heat leading to detonation, so the switch to copper was the choice I made. The colder heat range was supported by some tuner recommendations on several other forums due to allowing more timing. But again, if the dyno doesn't show that, I will gladly switch back.
On a seperate note, my '95 F-body ran great with NGK plugs and was relatively stock - even at 105k when I got rid of it.
Yeah, I was very reluctant to change myself based on some of the posts I have read. The car seems to pull more linear but I wont have any data until the dyno tunel. I kept my AC Delco plugs and will bring them to the tune just in case
. Heck, there's only about 1000 miles on them...The reading I did included opinions that the copper worked better for overall power. The debate came with a lower heat range. Some say yes, some say no. I can buy into the fact that the sharply pointed iridium tips of the AC Delcos could potentially retain more heat leading to detonation, so the switch to copper was the choice I made. The colder heat range was supported by some tuner recommendations on several other forums due to allowing more timing. But again, if the dyno doesn't show that, I will gladly switch back.
On a seperate note, my '95 F-body ran great with NGK plugs and was relatively stock - even at 105k when I got rid of it.
Track Junky
Joined: Jun 2007
Posts: 4,075
Likes: 36
From: Orlando Area
Tech Contributor
No problems whatsoever. I was having a lot of difficulty with burst knock and the car was pulling timing every time I went WOT with the stock plugs. No problems with either now. I ran the same TR6s on my GTO until I broke 800 to the tires, then I went to the BR7ES. When are you tuning?
Thanks again for the deal on the FAST and accomodations in shipping. I will let you know the dyno results as soon as I get them.
Sean
Will work for HPDE time.
Joined: May 1999
Posts: 2,560
Likes: 7
From: Orlando FL
Anytime, Sean. By helping you, I helped myself a little bit. 
Back OT, seems like a mixed bag, Gering. Small change if you're having issues, but sounds like nothing to reach for if you're not currently having a problem.
Back OT, seems like a mixed bag, Gering. Small change if you're having issues, but sounds like nothing to reach for if you're not currently having a problem.