vortech305

OK, first off, i've been gettting many responses on, which spark plug is good for my application, At the beginning i bought bosch plattinum's,I was told they were no good,NOw i got ACDELCO rapid fire plugs, now i was told there no good. My question is, I have the modded 305 TPI, and i run naturally aspirated on weekdays and 150shot of NOS on weekends. Which spark plug brand, can i use on my motor, which sees natural aspiration and some NOS use. Can it be the rapid fire, the AUTOLITE titanum plugs, what. PLease help........................... I was told that plattinum is not good for NOS, so which spark plug is compatible for natural aspirated and NOS????????????????????????????????????????????

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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.

camarocowboy

Itell you the best plug I feel to use is the one I have used in my z's all the and get the best life out of is a ac/r45ts but since you run a 150 shot I would recomend using a r44ts a slightly colder plug,as far as bosch platinum they are very good plugs and have been known to go 100,000 miles without being changed.Alot of my family members use them and nothing but.


87 z28
AFPR
LT1 injectors
Flowmaster
Hypertech chip

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Blockhead

Uh oh watch out! He is getting ANNOYED!


I would try a different approach if you want your questions answered.

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Yea .... but it's gonna to the big adios in a BLAZE a glory....
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PETE

iTrader: (1)

platinum is not a good choice for nos for one it's a soft,dense metal the heat that comes from burning nitrous causes the platinum to melt spreading outwards cracking the porcelin effectivly destroying the whole plug try going with the accel header plugs they are good plugs that hold up to high heat and will give you a little xtra clearence

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87 trans am 350 L98 aluminum heads,LT4 hot cam,slp runners,headers,y-pipe,edelbrock base,hi flo cat,air foil,ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt,ads strip chip,relocated iat sensor,hollowed maf

14.10@97mph w/2.01 60' 4SALE anyone want her?

arthur

I run a Joe Hunt magneto on my 1970 LT1 powered boat. The mag requires resistorless plugs. I looked at every plug manufacturer, going as far as contacting them. 95% of auto plugs are resistored. As much as 12k ohms. Accel are the only plugs that I have found that are truly resistorless.(0 ohms) I have been very happy with their performance and they are of high quality. Maybe look into using non-resistive plugs, to give you a better spark. The platinum plugs are good for performance because they require 28% less voltage/spark energy to jump the same gap compared to the steel electrode plugs. Also there is an iridium plug made by DensoIridium. I have contacted them and have found that their resistor plugs have only 5 ohms resistance, virtually nothing. For those of you that don't know, iridium is radioactive, and may last longer than platinum in the NOS environment. I don't know much about NOS, but I would think that the little it is used, the heat range in AC of 5 would be ok. But all of that has to tested. Try both... Other plug brands couple their heat ranges anyway. The iridium plugs also have the lesser spark energy requirement, maybe better yet than platinum. www.densoiridium.com Oh, and don't get so worked up, there is a plug that will work the best for your application, find it...

[This message has been edited by arthur (edited June 08, 2001).]

ws6transam

I use Bosch Platinum. So does TPIS. I've used them for in my Trans Am for eleven years. I once yanked a good set of platuinums out at 25,000 miles of use and installed Rapidfires. The Accel supercoil and Crane Hi-6 and spiral core wires ate them up within 10,000 miles. I reinstalled my old Bosch plugs and ran them another 15,000 miles.

I'll always use Bosch Platinum. Even when I get my minirammed 385 going. When I asked the head of the Roush Industries dyno farm about plugs, he said his two favorite were Autolite and Bosch Platinum. He said he likes Autolites because they are cheap, and he likes the Bosch plugs because they last a long time.



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Daniel Burk
View my third-gen hobbyist performance page!
View my reader's ride!
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El Guapo

Annoyed, huh? Humm, better stay away from guns me thinks.

When it comes to spark plugs, you will NEVER get agreement, someone will tell you that such and such plugs are the worst for your car.

I like AC Delco myself. It is what came stock and it has never given me any grief. Not to mention that it is usually the cheapest plug.

I would try what camarocowboy suggests, use R44TS.

Clayton

Kyle F

Yes use AC delco in a cool range like an R42LTS that is what my Turbo 6 uses and I am pretty sure it will work on a V8 to and its very safe to prevent detonation.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

88blkiroc

NGK Iriduim plugs are the best. Make sure whatever plugs you run, they are not the extended snout type. they do not work well with nitrous because of the long strap. im not sure exactly why, but i know that the shorter strap you can find, the better.

91banditt2

iTrader: (1)

what was wrong with his question?not a damn thing!!!!!!!!



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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
http://discussion-board.com/GreaterC...dyAssociation/
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IROCKZ4me

Avoid exotic metals in plugs for nitrous use. Platinum and such are made for weak ignitions, high resistance wires and such. They are intended for long plug life in stock situations. Platinum can cause detonation in high cylinder pressure situations (like nitrous use or high compression performance engines.) Platinum will spark in overly rich or oily cylnders, and with very little voltage applied to them, but the spark is small. Even if you increase the ignition systems power output with an ignition amplifier, spiral core wires and such, platinum pluga still make a small spark. A common copper core, regular tip type plug will make a larger, more powerful spark. The downside is that if your car is an oil burner and so rich that is black smokes like a refinery then they won't work as well as platinum. But then if it was that bad you wouldn't be using nitrous would you? You will have to change them more often than platinum.
Brand isn't so important, AC Delco, Autolight, Champion etc. are all good brands and racers and daily drivers of all kinds use each one. Just go with a good old fashioned tip. No forks, no splined tips, no tv antenaes, no pretzel tips. All of those are for lighting off in oily or rich/wet conditions with a weak ignition system. They all have small low energy sparks too. But in those bad conditions a small spark is better than no spark.
With nitrous the reason you don't use an extended tip plug is because the electrode and strap will retain more heat and may prematurely light of the fuel mix like a glowplug. The splines on the rapid fire electrodes can do the same thing. Sharp edges are a no no in the combustion chamber with nitrous. Sharp edges retain heat. Platinum and some other exotic metals used on some sparkplugs are also "combustion enhancers". They act the same way as sharp edges, as they can light off the fuel nitrous mix prematurely. On a naturally asperated, low compression engine that doesn't occur. With high compression, blowers, or nitrous it can.
Also with nitrous or blowers a cooler heat range is prefered to help prevent the plug from getting hot spots and "glowplugging". The downside is that carbon will build up more quickly on the plug requiring changing a little more often (especially if you're running rich or oily). But then if you're running plain (cheap) plugs then that isn't a problem.

An AC delco r43ts or better yet, r42ts or their equivalent will work quite nicely. They have a slightly shorter electrode and strap than the r43t and r42t.

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Tracy /AKA IROCKZ4me
'86 IROC-Z Camaro
"Cogito ergo zoom"

• 355 cid
• AFR heads
• Arizona Speed & Marine hydraulic roller cam w/ AFR hydra-rev kit
• modified SLP runners
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• Nitrous Express nitrous oxide

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Suaveat69

Actually copper is the second best conductor for spark plugs. I think silver is the best. Platinum is the worst conductor. Platinum just lasts a long time thats all. I have had good luck with spit fires. I put them in my van and got a 2 mog increase with just changing the plugs. I think rapid fires suck big time. Never will use them again and i get them free.

91banditt2

iTrader: (1)

gold is the best conductor.it has the lowest amount of resistance

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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
http://discussion-board.com/GreaterC...dyAssociation/
http://www.cincyspeed.com/

fly89gta

iTrader: (1)

i've used nothing but AC Delco rapid fire plugs in my GTA...are they the best? who knows..you are gonna find all kind of different opinions...but've used the rapid fires with no problems

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Bill87GN

AC delco, two heat ranges colder than stock, you should be good to go with that.

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-Bill

-=1987 Buick Grand National=-
Almost Jacked Up Like a Mother

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