Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C4 Tech/Performance
L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine Sponsored by
J&D Corvette

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 03-24-2005, 11:19 AM   #1
Fozzy_Bear
Waka, Waka, Waka!
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Support Corvetteforum!
 
Fozzy_Bear's Avatar
 
Member Since: Jun 2002
Location: Hanover Maryland
Default 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
__________________
.

Don't mind me... I'm just the comic-relief, talking bear.

.
Fozzy_Bear is offline   Reply With Quote
Old 03-24-2005, 12:37 PM   #2
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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.
steve40th is offline   Reply With Quote
Old 03-24-2005, 12:43 PM   #3
snoopdan
CF Senior Member
 
snoopdan's Avatar
 
Member Since: Sep 2004
Location: Fort Knox
Send a message via AIM to snoopdan
Default

Sounds like you have similar problems with your headers. My other thread about my headman woes might help ya. Us 86L owners have a few issues with headers, it appears.


snoopdan
snoopdan is offline   Reply With Quote
Old 03-24-2005, 12:44 PM   #4
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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.
steve40th is offline   Reply With Quote
Old 03-24-2005, 12:55 PM   #5
CTYANK2
CF Senior Member
St. Jude Donor '07-'08-'09-'10-'11-'12-'13-'14
Support Corvetteforum!
 
CTYANK2's Avatar
 
Member Since: Jan 2003
Location: SIMSBURY CT
Default

CTYANK2 is offline   Reply With Quote
Old 03-24-2005, 01:20 PM   #6
LD85
2005 Corvette
Support Corvetteforum!
 
LD85's Avatar
 
Member Since: Feb 1999
Location: Indianapolis IN
Larry Dickey
Send a message via Yahoo to LD85
Default

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.
LD85 is offline   Reply With Quote
Old 03-24-2005, 01:23 PM   #7
Fozzy_Bear
Waka, Waka, Waka!
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Support Corvetteforum!
 
Fozzy_Bear's Avatar
 
Member Since: Jun 2002
Location: Hanover Maryland
Default

Quote:
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.
They do have slight dimples for a few of the bolts, but nothing for the plug boots.

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.
Fozzy_Bear is offline   Reply With Quote
Old 03-24-2005, 01:26 PM   #8
Fozzy_Bear
Waka, Waka, Waka!
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Support Corvetteforum!
 
Fozzy_Bear's Avatar
 
Member Since: Jun 2002
Location: Hanover Maryland
Default

Quote:
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.
Thanks,
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.
Fozzy_Bear is offline   Reply With Quote
Old 03-24-2005, 01:54 PM   #9
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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.
steve40th is offline   Reply With Quote
Old 03-24-2005, 02:06 PM   #10
JAKE
CF Senior Member
 
JAKE's Avatar
 
Member Since: Feb 2000
Location: Kempner Texas
Default

Champion makes a RC series plug that is almost 1/4" shorter than regular plugs. Edelbrock recommends using that series for more clearance.

Something like RC12YC.

Jake
JAKE is offline   Reply With Quote
Old 03-24-2005, 02:09 PM   #11
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

Jake, I have an LT1, do you know if that is the same plug by chance, or do I need to just go down and find some Champion plugs?
steve40th is offline   Reply With Quote
Old 03-24-2005, 02:20 PM   #12
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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?
steve40th is offline   Reply With Quote
Old 03-24-2005, 02:29 PM   #13
JAKE
CF Senior Member
 
JAKE's Avatar
 
Member Since: Feb 2000
Location: Kempner Texas
Default

Quote:
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?
Steve, I've got an Excel file with TONS of plugs in a cross reference format. If you'd like it, let me know and I'll send it.

Might help you out.

Jake
JAKE is offline   Reply With Quote
Old 03-24-2005, 02:41 PM   #14
vettefast
CF Senior Member
 
vettefast's Avatar
 
Member Since: Sep 2003
Location: 1990 383 Stroker Baltimore Maryland
Default

Quote:
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.
These are the plugs I had to change to after I had my 383 built with Hooker long tube headers. To date they work great and hasn't missed a beat. Also I have not had a burnt boot yet! I got them through Summit.
vettefast is offline   Reply With Quote
Old 03-24-2005, 02:44 PM   #15
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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.

Last edited by steve40th; 03-24-2005 at 02:48 PM.
steve40th is offline   Reply With Quote
Old 03-24-2005, 02:49 PM   #16
DINO
CF Senior Member
Cruise-In II Veteran
Cruise-In III Veteran
Cruise-In IV Veteran
I went to Cruise-In V with Vetteweiser
 
DINO's Avatar
 
Member Since: Feb 2000
Location: Howell N.J. Home of Redgar
Default

I had a similar problem with #8 , we put a shield that the F-bodies have on there plugs and wah la no problems .
__________________
96CE LT4
BEAR CLAW / K&N AIR FILTERS
HYPER TEK PROGRAMMER
180 THERMOSTAT
TAYLOR 8MM /PLAT + 4 PLUGS
STEELBRAIDED BRAKELINES
TPIS LONGTUBE HEADERS
RANDOM TECH CATS
STRAIGHT PIPES WITH ELIMINATORS
ERADISPEED SLOTTED BAER ROTORS
HAWK HPS FERRO-CARBON PADS
DINO is offline   Reply With Quote
Old 03-24-2005, 03:08 PM   #17
JAKE
CF Senior Member
 
JAKE's Avatar
 
Member Since: Feb 2000
Location: Kempner Texas
Default

Quote:
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.
Already sent to you and you've already received it. Fast "ain't" I?

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
JAKE is offline   Reply With Quote
Old 03-24-2005, 03:40 PM   #18
tpi1986
CF Senior Member
 
tpi1986's Avatar
 
Member Since: May 2004
Location: Martell NE
Default

problem is they told me that was with a tappered seat, which the factory alm head is not. Freaking driving me nuts
tpi1986 is offline   Reply With Quote
Old 03-24-2005, 03:50 PM   #19
steve40th
CF Senior Member
St. Jude Donor '03 & '05
 
Member Since: Feb 1999
Default

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.
steve40th is offline   Reply With Quote
Old 03-24-2005, 04:05 PM   #20
tpi1986
CF Senior Member
 
tpi1986's Avatar
 
Member Since: May 2004
Location: Martell NE
Default

Quote:
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.
Yes that is true alm on the vette from feb 86 on and Iron always on the camaros, but the problem is that the alm head has a 3/4 reach with a non tappered seat. The seat seems to be the big problem. I have found plugs that are short, with the right reach but have a tappered seat.

Believe me, if someone finds one I will be their biggest fan. This entire search has about made me nutz
tpi1986 is offline   Reply With Quote
Old 03-24-2005, 04:05 PM
 
Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Reload this Page Headers and short plugs.
 
 
 
Reply

Tags
0414ss, 383, c4, headers, plugs, short, shorter, stroker, vehicles


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Spark Plugs From Hell tlxxtl C4 Tech/Performance 19 07-19-2014 01:40 PM
Some help with Dart Pro 1 straight plug heads and headers donyue C3 Tech/Performance 7 10-05-2012 08:21 PM
SBC AFR's with Hooker sidemount headers (good & bad) SmokedTires C3 Tech/Performance 22 04-14-2004 06:49 AM
What headers work with angle plug heads? STLBLUES C3 Tech/Performance 14 02-18-2004 07:29 AM
Spark Plug Gap after intake/cam/headers upgrade? desi C3 Tech/Performance 3 05-01-2003 12:41 PM


All times are GMT -4. The time now is 08:43 AM.


Emails & Password Backup