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01-25-2003, 07:33 PM
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#1
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Registered User
Join Date: Nov 2001
Location: Surrey, BC, Can
Posts: 2,678
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AFR Heads and what plugs?
Those of you running a blown motor with AFR heads. What plugs are you using?
I HAD been using the NGK TR6's on my LT1 heads but AFR says that I need a gasket. The TR6's do NOT have a gasket.
When I bought the heads they came with some NGK plugs that DO have a gasket.
The model number is "BCPR6E - 11" and are *gasp* "for imports"
Can anyone give me some idea if these plugs are the right ones to use, and if not, which ones.
__________________
1997 T/A WS6 Vert, Black, 383, ATI Procharger D1-SC @15#, AFR 190's, FLP's, Borla, Kenny Brown DD SFC's, Spohn TQ, Hal's, SLP-Springs, STB, sway bar, shifter-Lou Salzano SS, 5-point chrome roll bar, ZR1 rims, KTRE 12 bolt 3.73's, Mcleod Street Twin, FAST ECM, 75# injectors and Racetronix dual intank pump, HKS BOV
Best 12.30 @ 122.3- "Traction.....we have a problem" 527 RWHP / 570 lbs. (before new combo)
2004 Black Caddy CTS-V. Stock for now
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01-25-2003, 09:03 PM
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#2
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Registered User
Join Date: Jul 1999
Location: Tucson, Arizona USA
Posts: 605
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Well, I don't know anything about the plugs you mention, but I use Autolite 3923's with my 190's. They are three ranges colder than the "normal" heat range, a 3926. They seem to work well for me.
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Willie
1987 "20th Anniversary Commemorative Edition" Z28 Convertible
2008 Shelby GT500
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01-26-2003, 10:38 PM
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#3
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Registered User
Join Date: Mar 2002
Location: San Juan PR
Posts: 3,811
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I am using ngk bpr7es which are one range colder plugs...
__________________
94 Camaro 383 YSi-trim A2W aftercooler
AFR 210 Eliminators 9.3:1CR.
ETC Monoblade LS1 PCM Installed EFI Connection 24x
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01-27-2003, 12:24 PM
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#4
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Registered User
Join Date: Oct 2001
Location: Bay Area, CA, USA
Posts: 408
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I have the AFR heads and have been running with the TR6 for 3 years with no problems. ?
cheers
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01-27-2003, 09:52 PM
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#5
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Registered User
Join Date: Oct 2001
Location: rancho cucamonga ca
Posts: 156
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same here, im use the TR6's in my car and they work great, have had alot better luck with these over the autolites
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93 Z28 TH400,9", 383 vortech YS-trim 700RWHP....9.52@142mph with a 1.39 60'...5.98@116mph with a 1.30 60' in the 1/8th ..all using a 8-ribbed belt
new setup 85mm turbo  first time out 9.28@151
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01-28-2003, 12:06 AM
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#6
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Registered User
Join Date: Nov 2001
Location: Surrey, BC, Can
Posts: 2,678
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Do you guys running the TR6's have any kind of gasket with them?
NGK sent me an email saying the ones I have would be fine but to gap them to .350 which I was going to do anyway.
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01-28-2003, 01:04 AM
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#7
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Registered User
Join Date: Oct 2001
Location: rancho cucamonga ca
Posts: 156
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nope no gaskets... 
__________________
93 Z28 TH400,9", 383 vortech YS-trim 700RWHP....9.52@142mph with a 1.39 60'...5.98@116mph with a 1.30 60' in the 1/8th ..all using a 8-ribbed belt
new setup 85mm turbo first time out 9.28@151
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01-28-2003, 01:09 PM
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#8
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Registered User
Join Date: Oct 2001
Location: Bay Area, CA, USA
Posts: 408
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no. Don't ever remember seeing a gasket for the TR6 with the AFR heads.
--Hugh
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01-28-2003, 03:48 PM
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#9
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Registered User
Join Date: Nov 2001
Location: Surrey, BC, Can
Posts: 2,678
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Well it was AFR that said I should have gaskets and they recomended Autolites, but the heads came with these NGK plugs and it looks like they will work.
*shrug*
Thanks for the response guys.
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01-28-2003, 06:08 PM
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#10
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Registered User
Join Date: Mar 2002
Location: Baton Rouge, LA, USA
Posts: 2,829
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The AFR heads are machined for a gasket seat plug. The area around the threads is machined flat for the gasket to seat. This is common in aftermarket aluminim heads. I use A/C FR3LS, but the Autolite 3924 / 4 / 5's will work.
The stock heads are machined for taper seat plugs. The area around the threads is machined with a taper for the plug to seal against.
Mike
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'95 Z-28
388, AFR 210 Heads, Comp 224/236 cam
Home-built T-76 GTS turbo setup
TH350 & Vigilante 2400
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