See sig below, Anywho, which spark plug is compatable with my worked 305 TPI, On back of the ACDELCO box it says "RAPID FIRE PERFORMANCE PLATINUM'S elctrode system. I thought platinum was bad for nitrous. Basically, what im asking is FOr crying out loud which spark plug is both compatible with a naturally aspirated motor and nitrous.

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92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

Neither, just run regualar AC plugs and you'll be fine. Platinum plugs are bad in any performace application becuase the platinum has the tendency to retain more heat, thus causing a hot spot that is more rpone to detination. The rapidfires are even worse, not only are they platinum tipped, but they also cost way too much money with no real value over a conventional plug.
...ed

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Ed Maher - Moderator @ The Carb Board
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

 

I agree I am back to stock plugs and happier. .I change them every year and for 99 cents a pop you can't go wrong.

 

I will be changing my plugs back to stock delco plugs. A friend of mine worked at the local gm dealership, and the master tec told him that 99% of the cars on the road would run better with the stock gm plugs. I have also been told this by the master tec at the pontiac dealership. If 2 different master tecs say that it is good enough for me.

 

I've never been happier than I am with the AC Delco rapid fires, they are the best plugs you can put in a GM car or truck. I learned in my auto mech class you are only supposed to use stock style plugs in your car. And AC/Delco is what came stock in the cars, so go with them!

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base

 

Add me to the Delco list. My car purrrred after i got the new plugs in. No more vibrations or anything at idle (still don't know wtf happened to my old plugs).

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR
-Gutted Air Boxes

 

I thought of that but i was told that platinum's were bad for cars using nitrous, And i need a set of plugs thats good enough to drive in the street naturally aspirated and still in great use when i use the nitrous on weekends.

 

run something in the AC R41TS - R43TS range (lower number is colder) and stop worrying about gimmick plugs. A properly tuned engine will gain nothing with a gimmick plug, hell, even a poorly tuned engine has little to gain from rapidfires.
...ed

 

Another vote for the old plain jane AC Delco's. The only other plug I've had good luck with is Champion Truck plugs--no gimmick electrode or anything, just a tough plug. I haven't had good luck with Champions in the past, but these were a gift 5 years ago Christmas and still work and look like new.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro

 

Well, just to be different, I run the bosh +4's why? Well, at first, I got an MSD ignition system that means that below 3000 RPM I will have several sparks fired. I believed that surly later I could find proof that this would burn more gas in the cylinder=more power/better economy. Then combined w/ a +4 the sparks have a chance of going to different electrodes, again, maximizing gas burned. The truth unless someone out there can prove me wrong, is that there has been little to no research done into flame front calculations. The closest thing to trying to optimize the explosion was the hemi engines which attempted to chape the charge reflecing more off the head, and back down onto the piston. Judging by the power these things produced, I would say chrysler was dead on, hell, they basically got kicked out of nascar for the engine! (rules made that basically made hemi engines not allowed in nascar). However, there is no proof. So I am going to just keep on running my +4's until I personally get a chance to tinker w/ all sortsa different plugs on a dyno. However my little MSD->+4 theory suits me just fine.
Now if I can just get around to setting my timing....


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Corry Lazarowitz
clazarow@voicenet.com
clazarowitz@hotmail.com
1987 Pontiac Trans AM (GTA?) 350 or is it a 305?! TPI
SLP 1 3/4" headers, 3" cat back (stock cat
MSD ignition.
MSD Blaster SS coil.
3.73 Rear end gears
Accell 8.8 Wires
Bosh +4 Spark Plugs (Don't know if they really help but hell!)
Holley AFPR
Race Built Automatic trans ('vette servo, shift kit, tightly packed clutches)--just needs titanium gears now!
Newly gutted cat (the car gutted it's own cat!)
Hypertech Chip (Just found out I had it! :eek
More soon when funds are avail...

 

AC DELCO till I die. Nothing fancy but just as fast without the over priced Bosch platinums

 

I am using the regular Bosch Platinums because they are shorter than stock and with headers it makes it easier on the spark plug boots. Just wondering if AC Delco makes a shorter plug in the stock heat range?

 

Ok so what should i go with the ACDELCO Rapid fires or the Regular ACDELCO plugs from dealership. Remember i need a plug thats good enough running naturally aspirated and running nitrous

 

id say regular ACs, cuz ive heard the platinum/nitrous rumor.

and dont go to the dealer...they cost too much

 

What does the regular ACDELCO plugs use instead of Platinum