Headers and short plugs.
Thread Starter
Waka, Waka, Waka!
Joined: Jun 2002
Posts: 2,435
Likes: 2
From: Richmond Virginia
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Headers and short plugs.
Hi All.
I just installed TPIS long tube headers and plug number 7 is very close to the tube. I want to put a shorter spark plug in to give myself a little space (using Accell U groove plugs right now). I am sure I can spend 2 hours searching and find a list of plugs that would fit, but does anybody have any personal recommendations?
I am using stock heads (late '86 aluminium) now. And I will be swapping in a set of twisted wedge heads when I do a rebuild later this year.
thanks
I just installed TPIS long tube headers and plug number 7 is very close to the tube. I want to put a shorter spark plug in to give myself a little space (using Accell U groove plugs right now). I am sure I can spend 2 hours searching and find a list of plugs that would fit, but does anybody have any personal recommendations?
I am using stock heads (late '86 aluminium) now. And I will be swapping in a set of twisted wedge heads when I do a rebuild later this year.
thanks
Le Mans Master
Joined: Feb 1999
Posts: 9,919
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Mr Gaskets website has Accels numbers, but I think they are the only short plug. Yo might want to also call Myron at TPIS and see what plug they use. I put a socket on one of my plugs, then tighten it, and the boot is real close to the header.
Accels tech line responded to me last night within a couple housr. But, they say they only make platinums for mine, 93 LT1.
Accels tech line responded to me last night within a couple housr. But, they say they only make platinums for mine, 93 LT1.
Le Mans Master
Joined: Feb 1999
Posts: 9,919
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
That is strange, even with the shorter plugs? Does anyone else have shorter plugs. Dimpling the headers doesnt hurt, and I have heard of TPIS headers having to have this done.
Thread Starter
Waka, Waka, Waka!
Joined: Jun 2002
Posts: 2,435
Likes: 2
From: Richmond Virginia
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Originally Posted by steve40th
That is strange, even with the shorter plugs? Does anyone else have shorter plugs. Dimpling the headers doesnt hurt, and I have heard of TPIS headers having to have this done.
I _DO_ have thick boots (MSD) and there _IS_ some space (like .010") so I am not claiming that the headers are poorly designed (the Y pipe sucks, but that's a different thread). I just want a little more safety margin than that. I have ordered some heat insulating material from the forrum store; that will probably do the trick. I skimmed Snoop's thread and it was kind of the reason I was posting the question. a few people mentioned short plugs, so I thought I'd ask the question more specificly and see what people had to say.
Thread Starter
Waka, Waka, Waka!
Joined: Jun 2002
Posts: 2,435
Likes: 2
From: Richmond Virginia
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Originally Posted by LD85
header shorty plugs summit racing # acc-0414s and acc-0416s
Jegs # 111-0416s 14mm X .750 $2.99 each.
Summit has a ten day back order wait.
Jegs # 111-0416s 14mm X .750 $2.99 each.
Summit has a ten day back order wait.
But do you have any personal experience with those particular products? I was hoping to get some feedback from people who have actually used them.
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Le Mans Master
Joined: Feb 1999
Posts: 9,919
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
They are the U Groove, which is very similiar to the V Groove in NGK. I cant see really how plugs are made any different. There is probably a company thaqt is contracted to do the plugs for Accell.
Le Mans Master
Joined: Feb 1999
Posts: 9,919
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Hey I just went to the Jegs website and they have 2 plugs there, a RC12YC that is a .750" reach, and a RV12YC that is a .460" reach. I checked Accels and they say LT1 have a .460" reach for the recommended plugs needed. SO is the LT1 that different to the L-98 motors?
The reason I say this is Edlebrock does recommend the RC12YC, but Accell recommends the .460" reach, and I believe the reach part is how m\far the plug goes into the head?
The reason I say this is Edlebrock does recommend the RC12YC, but Accell recommends the .460" reach, and I believe the reach part is how m\far the plug goes into the head?
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by steve40th
Hey I just went to the Jegs website and they have 2 plugs there, a RC12YC that is a .750" reach, and a RV12YC that is a .460" reach. I checked Accels and they say LT1 have a .460" reach for the recommended plugs needed. SO is the LT1 that different to the L-98 motors?
The reason I say this is Edlebrock does recommend the RC12YC, but Accell recommends the .460" reach, and I believe the reach part is how m\far the plug goes into the head?
The reason I say this is Edlebrock does recommend the RC12YC, but Accell recommends the .460" reach, and I believe the reach part is how m\far the plug goes into the head?
Might help you out.
Jake
Drifting
Joined: Sep 2003
Posts: 1,652
Likes: 2
From: 1990 383 Stroker Baltimore Maryland
Originally Posted by LD85
header shorty plugs summit racing # acc-0414s and acc-0416s
Jegs # 111-0416s 14mm X .750 $2.99 each.
Summit has a ten day back order wait.
Jegs # 111-0416s 14mm X .750 $2.99 each.
Summit has a ten day back order wait.
I got them through Summit.
Le Mans Master
Joined: Feb 1999
Posts: 9,919
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Jake, please email it to me. corvettesrule@hawaii.rr.com
This is confusing, about the reach, as 2 companies recommended diferent reaches.
Just went to Chamions website and they recommend a RS14Yc6 which has a .708" reach. Now I begin to wonder. I am going to go to the store, and buy one of each with the different reaches and put them in my heads. I have the heads off and will get photos.
This is confusing, about the reach, as 2 companies recommended diferent reaches.
Just went to Chamions website and they recommend a RS14Yc6 which has a .708" reach. Now I begin to wonder. I am going to go to the store, and buy one of each with the different reaches and put them in my heads. I have the heads off and will get photos.
Last edited by steve40th; Mar 24, 2005 at 02:48 PM.
Safety Car
Joined: Feb 2000
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From: Howell N.J. Home of Redgar
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
I went to Cruise-In V with Vetteweiser
I had a similar problem with #8 , we put a shield that the F-bodies have on there plugs and wah la no problems . 
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Originally Posted by steve40th
Jake, please email it to me. corvettesrule@hawaii.rr.com
This is confusing, about the reach, as 2 companies recommended diferent reaches.
Just went to Chamions website and they recommend a RS14Yc6 which has a .708" reach. Now I begin to wonder. I am going to go to the store, and buy one of each with the different reaches and put them in my heads. I have the heads off and will get photos.
This is confusing, about the reach, as 2 companies recommended diferent reaches.
Just went to Chamions website and they recommend a RS14Yc6 which has a .708" reach. Now I begin to wonder. I am going to go to the store, and buy one of each with the different reaches and put them in my heads. I have the heads off and will get photos.
You probably already know this, but you've got to choose plugs with the correct reach, thread, hex and heat range, seat type and over-all length.
I've seen heads with .460 reach plugs installed when they should have been .750 and several threads in the heads were exposed to the combustion process.
I've also seen plugs meant for aluminum heads screwed into cast iron jobs. My conclusion: Don't depend on the parts counter guy to give you the correct plugs. Know what you need before you walk in the door.
Just my thoughts.
Jake
Jake
Racer
Joined: May 2004
Posts: 305
Likes: 9
From: Martell NE
Originally Posted by steve40th
TPI86, Didnt GM have a aluminum head on the Vette and a cast iron head on the Camaro L-98 motors? Maybe they are confused.
Believe me, if someone finds one I will be their biggest fan. This entire search has about made me nutz
