What is the best spark plug to use in a basically stock TIII?...the old owner had
autolite AP65 in it which is a platinum plug. Is that bad? I heard you should not use platinum plugs in a forced induction engine. Maybe that explains some of the issues i've been having. I have heard alot about NGKs but which ones are best?
Heres my setup
3-inch dp and exhaust with cut out
MBC set to 12 psi
58mm t/b
180 degree t-stat
Walbro 255lph
ARP head studs, and cometic headgasket
I err on the side of caution, and never use any precious metal plugs for any forced induction application.
Mike Marra
1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
Project Log:
http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=
I use autolite 63's in my T-3
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NGK Iridiums...
+ infinity, and go a few steps colder.Originally Posted by CaptMoe
58mm is still too big.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS!12.57@104 :O)
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
is it ok to go colder on a stock setup?...why is it too big?
Yep, one or 2 steps colder help.is it ok to go colder on a stock setup?...why is it too big?
You don't have the matching flow setup so its a waste and it could actually hurt.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS!
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
If you have a stock setup you wont realize any gains with a 58mm TB.is it ok to go colder on a stock setup?...why is it too big?
That's what I was advised when I asked around. And it makes sense.
If you're going to go big there you'll need a bigger turbo and more fuel...
I forgot to ask, did you open up the intake hole where the throttle mounts to match the 58mm? If not, you have a major restriction there.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS!
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
Hey Turbovanman, so I can find NGK Iridiums in only 2 sizes that fit our vehicle. GR4IX is what sites recommend for our vehicle. GR5IX is only one step colder. Reading on a lot of other sites, I see many people with forced induction engines recommending a heat range of 7. Do you know of any colder plugs than the GR5IX?
Autolite XP63 had been my favorite.
AR3923 /thread ?
Sparks jump more easily from/to sharp edges. A regular plug with sharp edges, and a strong ignition, is fine. Over running time heat/sparks melt/erode sharp edges. High combustion pressures can quench/suppress spark. Sharp edges fight that. Low powered ignition can fail to push a spark through/into high combustion pressures, especially when your plug's edges are rounding/rounded. If, you're fighting hi speed misfires and hi boost misfires, then that's where iridium - NOT platinum - comes in. Steel and platinum edges melt at far lower temps than does iridium. Sharp point stays that way - in the face of high temps that defeat other plugs.
John Laing
"The sole condition which is required in order to succeed in centralizing the supreme power in a democratic community, is to love equality, or to get men to believe you love it. Thus the science of despotism, which was once so complex is simplified, and reduced . . . . to a single principle."
-- Alexis de Tocqueville
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary."
--Ayn Rand
"To evolve, you don't need a Constitution. All you need is a legislature and a ballot box . . . . things will evolve as much as you want. All of these changes can come about democratically; you don't need a Constitution to do that and it's not the function of a Constitution to do that."
-- Justice Antonin Scalia
I always buy the NGK V-Power GR4 or GR5 plugs for my TI/TII/TIII stuff. Good inexpensive plug for the mild builds I do.
I'm also a fan of NGKs
Yeah, the V-Powers are an effective inexpensive plug.
John Laing
"The sole condition which is required in order to succeed in centralizing the supreme power in a democratic community, is to love equality, or to get men to believe you love it. Thus the science of despotism, which was once so complex is simplified, and reduced . . . . to a single principle."
-- Alexis de Tocqueville
"One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary."
--Ayn Rand
"To evolve, you don't need a Constitution. All you need is a legislature and a ballot box . . . . things will evolve as much as you want. All of these changes can come about democratically; you don't need a Constitution to do that and it's not the function of a Constitution to do that."
-- Justice Antonin Scalia
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