I installed some Hooker Super Competition Long tube headers on my '87 IROC. My #7 plug is way too close to the header tube. I'm afraid it will melt the plug boot sice it touches the header. Does anyone make a short plug that is compatible with the following AFR-recommended plugs?

AC Delco FR3LS
Champion RC9YC
Autolite 3910 or 51

It just needs to be 3/4" of thread with a metal gasket seal and in the same heat range.

Does ACCEL make a short plug?

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Phil87IROC
Blue '87 IROC, 383 Crate Motor, KB pistons, AFR 190 heads, ZZ-9 cam, Edelbrock RPM intake, Hooker SC/LT headers, Edelbrock 750 cfm Carb (#1411), stock T-5, GM 3.42 rear w/Auburn posi.
Ohio Valley Dragstrip Trophy Bracket WINNER - 8.39 ET on a 1.82 sec. - 60'. Best MPH = 84.44. Still Tuning Carb!
Red '89 IROC L98, TES, 700R4, T-Tops, K&Ns w/open air boxes, 160 T-stat, Hyper Chip, gutted MAF & CAT, Jacobs Ign., 53kv coil, MSD wires.

[This message has been edited by Phil87IROC (edited May 21, 2001).]

 

Perhaps the bosch platinums would work good.

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www.rearman.com/camarokid.htm

If it aint a V-8 that $hit aint fast!,unless its a GN,lol!

305 tpi,700r-4 with shift kit,My mods are minimal,just a bunch of little $hit.Anyone know where to get underdrive pulleys for a v-belt set up?

 

Phil,

Accel PN 276S is a shorty plug but is the tapered seat rather than gasketed style. As long as you're not running a Jacobs box on the 87 I send the recommendation to look at the Bosch platinums. They're about the same length as the Accels.

 

i had to put autolite platinums in my back cylinders. I had the same problem and the only way to change the plug was to snap it off to get a socket on it. the autolite platinums are working great for me and are about 1/4" shorter then the bosch.

my $.02

 

Maybe I'm mistaken, but Platinum plugs don't work so good with certain ignition boxes.

Unfortunately Accel does not make a shorty plug for aluminum heads like the AFR 190s, otherwise this would be a non-issue. For AFR heads it must be a 14 mm, 3/4" reach gasketed plug. I spoke to the Accel tech line today and they plan on introducing a shorty plug next year under P/N 0416S for aluminum headed SBC motor and such. They have heard our cry and will provide a product to meet our needs. Hope I can make it w/o a fire till then!!

Thanks for all your help!

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Phil87IROC
Blue '87 IROC, 383 Crate Motor, KB pistons, AFR 190 heads, ZZ-9 cam, Edelbrock RPM intake, Hooker SC/LT headers, Edelbrock 750 cfm Carb (#1411), stock T-5, GM 3.42 rear w/Auburn posi.
Ohio Valley Dragstrip Trophy Bracket WINNER - 8.39 ET on a 1.82 sec. - 60'. Best MPH = 84.44. Still Tuning Carb!
Red '89 IROC L98, TES, 700R4, T-Tops, K&Ns w/open air boxes, 160 T-stat, Hyper Chip, gutted MAF & CAT, Jacobs Ign., 53kv coil, MSD wires.

 

Phil, did you get a measurement from Accel on their 416 plug? Thats what I'm using with my TF aluminum heads. THe 416 plug isn't carried by all parts places, so you may have to look around. It was the shortest of the 3/4 reach plugs when I was looking a couple of years ago.

I can measure one if you'd like since I have a couple of used sets around the garage.

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KevinP92Z
92 Z28 383 SLP cam,SLP headers,SLP 2ontheLeft,Trick Flow TW heads & pistons,Edelbrock base,Accel SuperRam,52mmTB,Scat Crank & forged ConnRods,MSD 6AL,SLP convertor,Baer 13/12" Track,Moser axles,Hotchkis,Genuine GM 3.42s,SLP HD Torsen,17x9" chrome SS rims
96T/A w/SLP Ram Air,SLP 2ontheLeft, Bilsteins, Baer, Hotchkis, Genuine GM, Torsen
76 4X4 Blazer 400TPI project

 

Kevin,

Yes, please measure it. I need a shorter plug, ie, shorter from the gasket seat to the boot end of the plug. Also, please be sure the 416 is indeed a 14mm, 3/4" reach gasketed plug. If it's good, I'll need an accurate part number to shop for them. Where did you get these? Are your headers 1-3/4" SLPs?

Thanks Kevin

[This message has been edited by Phil87IROC (edited May 23, 2001).]

 

Phil87IROC
What plugs did you end up using? I have the same dilemma now also. did the Accel 416's work? Thanks.


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87 IROC-Z
Minirammed Solid Roller 377

 

Scott What type of heads do you have? Straight plug? Angle plug? OR L98 angle plug? I believe Phil made his own shorty plug. Phil - can you post the specifics on how you made that plug?

FYI - Phil has straight plug heads.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

[This message has been edited by TRAXION (edited September 18, 2001).]

 

I have Brodix -10 angle plug heads. I have been trying to figure out why I am not making power. I am using the Accel shorty plug but they only have a reach of .460" and my heads need a plug with .750" reach. I am going with long tubes in the spring but want the correct plug in there now.

 

Traxion/Scott:

I made my shorty plug from an AC Delco FR3LS plug. It's the right type for my AFRs.

I simply put the spark plug tip, where the plug wire attaches to the plug, in a vice. Be careful not to crush it. I then took a 5/8" wrench and unscrewed the tip from the main body of the plug. The tip is about an inch to an inch and a half or so long. Now you have a plug with no tip and bare ceramic isolator showing. I used my grinder and ground the ceramic isolator down about 3/4". Be careful to preserve the hole in the isolator and to use a fine, not coarse grinding wheel. It took me about an hour to slowly grind it down.

I then took the tip, shortened it in length with the grinder a bit, and lightly tapped it back into the hole in the isolator. Tap it in straight, the isolator is fragile.

This new plug may have a different overall impedance than the stock FR3LS plug, but it fires great in the motor and fit just great. I have enough room now for the plug boot and a heat sleeve over it.

I need to make a few more spares...........

 

I have a buddy with standard angle plug heads and long tubes and there was no fitment problems. So....

Long tubes plus standard angle plugs = OK
Long tubes plus straight plugs = problem w/ #7
Long tubes plus L98 angle plugs = ???

Looks like I might be the first person to answer that question. Hard to believe that nobody here has used the long tubes with L98 angle plugs but I guess not.

Tim

------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Trax,

Be sure to check out your header ports for extra weld and burrs. I spent about two hours cleaning up the ports on my long tubes with a small grinding bit and then port matched the gaskets too.

Also, I totally regret not getting my headers jet hot coated!!! If I ever remove them, they'll get coated for sure!!

Keep us informed on your L98 angle plugged AFRs headers installation!!

 

Bosch 7985. Paid $1.79 each!

 

Those plugs are much too long!! My plug is barely 1/2" to 3/4" long for the insulator. My header is directly over the plug hole.

 

What do you mean too long? My Ac delco r45ts plugs are like a half inch longer than the bosch plugs i mentioned! I am talking stock heads and Edelbrock TES headers too. I also picked up a set of 90 degree plug wires just incase.

 

Yeah, hard to believe, but those won't work for my app, too long........my shorty plugs are so short you'd be amazed.

The 2210 headers were not designed properly, that is my problem. But they should provide good low end torque and I never considered dimpling them at all........I'm running mid 11s with 'em with 1.5 60s........ fun!!

Thanks for the dialog.......

 

Depends which long tubes. I have Hedman 68460s and no problems at all with straight plugs on any of the odd-side cylinders. One of the even-side tubes, I don't remember if it's #2 or #4, is a little tight for getting a standard-length plug started but once it's seated there's more than enough room for plug boots.

A silicone boot can withstand some pretty high temperatures, close to 700F or so. As long as there's some clearance at all times, it'll pretty much be fine.

 

I think the Bosch 7985 insulators are like an inch long. The insulators are a lot shorter than the ac delcos stock plugs though. A lot shorter. Even the metal case of the plug is shorter. I haven't installed the headers or the plugs yet either. I am hoping everything will be fine now especially with new 90 degree wires! LOL A lot better fit than the stock plugs and wires that were on there though. I guess we'll see. Later

 

This thread is 9 years old.

 

so what.

 

just installed hooker 2055s headers and used accel 576S plugs. They worked fine, although I had to use a box wrench to tighten half of them.

 

AC delco plugs worked fine for me, I used high temp plug wires and header wrap. So far nothing has been burned.

 

Anyone use the Accell 8199 shorty plugs with Hooker 2460 headers? Is there any fitment issues with these headers?

Thanks!!

 

Are the 2460's shorty type headers? If they are you can use Bosch 7985 plugs. Cost me $1.79 each. Wires with 90 degree boots can be used from a 79 Camaro 350 and those should only cost you $17.00

 

The Bosch 7985 are way way shorter than the stock AC delco rt45

 

The headers are the Hooker 2460 shorty type. I currently have the AC RT45 for it and I plan on replacing the cap/rotor and wires. I heard that Bosch plugs dont work too well in our type of cars. Have you had any issues with those? Do they give you any better hp or gas economy?

Thanks again!

 

Who told you that? I have been using the same Bosch plugs for a year now.

 

I have read a few posts here and there on the forums about the Bosch +2 and +4 types dont run too well on our thirdgens.

Do you get good power and throttle response from the Super Plus plus? What about the gas mileage?

Thanks again!!

 

I guess my throttle response and mileage is about the same, I dont think plugs make that much of a difference

 

Do you have the headers installed yet?

 

91....

I dont have them installed yet. Do you know how much shorter are the Bosch 7985 compared to the AC r45ts plugs?

Where did you get the plugs for 1.79?

 

I got the plugs at Napa. Look on napaonline.com and enter your zipcode for a local store. You can also find spark plug wires there for a 1979 Camaro 350 that are 90 degree boots. That is what you will need. Wires were like $17. The plugs are a lot shorter than the rt45's. Proabably close to 1/2 inch shorter.

 

91...

Did you use the spark plug wires that go over or under the valve covers? Which type is a better fit and clearence for the spark plugs? I wanted to use a center bolt spark plug wire looms to give a nice clean look.

Thanks!!

 

just make sure you use 90 degree boot type wires and have them so they don't touch your headers. Do your headers have air tubes?

 

91...

I currently have the Hooker 2460 ceramic headers, which I am planning on installing. I do not have AIR tubes on them. I was thinking of getting wires that go under the headers instead, that way I can try to keep them more away from the exhaust.

Which way do you think is better and easier to go with.??..

Thanks...