Best Plugs for the L-98

[Rufus1050]

I know that there are many brands on the market...based upon owners who tune their cars for daily drilving or weekend outings, what's the best brand of plug on the market? Consider weather conditions in the deep south...

 

[Vettefan87]

ACDelco's either get the cheapies which are fine. Or get the Rapidfires which are very good plugs.

 

[nyernga]

ACDelco's either get the cheapies which are fine. Or get the Rapidfires which are very good plugs.

What he said.............I did mine last weekend. Delco is the way to go.

Len

 

[vetteboy86]

Thats another vote for AC Delco

 

[jimmers]

I also vote for AC Delco!

 

[ON 7TH]

bosch plat 2's in my 85,hyper tech coil,cap,rotor kit & autolite 8.5mm wires

 

[Edmond]

For daily driving or weekend outings, stick with the Delco's, not the Rapid Fires. I don't see the need to spend the extra money on the Rapid Fires unless you're going to run it hard.

 

[Vettefan87]

Aren't vette's made to be run hard...:confused

 

[Edmond]

Aren't vette's made to be run hard...:confused

I should've said Mad Mic type of hard.:L

 

[NT Vettman]

Bosh platinum 2 with an acell super coil and cap. Runs great especialy at high rpms

 

[Mad-Mic]

I should've said Mad Mic type of hard.:L

:L Edmond you Funny Guy!

AC Delco .99 cent plugs work great! gap'em up alittle. .045 works great. stock specs are .035 but you want a wider gap for better burn.

i'm not a big fan of the Bosch Plat +1 +2 or +4's especially +4's. once you have more than 1 electrode coming down it starts blocking fuel to burn correctly. your basically shielding the spark from the fuel. this ends up fouling the plug out and making the car run rich. mine were toast after 6k in miles and i lost 4 mph in the 1/4 because of it! so after that experience AC Delco Rapid Fires or just plain ole AC Delco's work for me. then again i change them out every 6 months or so depending on how they look.

 

[gmjunkie]

The Junk has go with AC Delco!!

Keep your GM car all GM!! gmjunkie!!

 

[Edmond]

Keep your GM car all GM!! gmjunkie!!

Especially with electrical components. I find that Delco electrical products are built very well.

 

[ProEMTPFF]

AC Delco Rapidfire!

 

[G Winter]

:L Edmond you Funny Guy!

AC Delco .99 cent plugs work great! gap'em up alittle. .045 works great. stock specs are .035 but you want a wider gap for better burn.

How does the wider gap effect idle and coming off idle? For yrs chevy ran .o45 gap , I have wondered why they run .035 on the vettes.

Glenn

 

[Rufus1050]

Best Plugs

I appreciate all the responses from you guys...there's a set of rapid fires in at present and was thinking about changing them. The problem is I'm not certain that I'm having problems with the plugs, it may be the injectors or the pressure regulator. Changed the fuel pump last week and I'm only seeing about 32 lbs of pressure at idle. I'm still doing some trouble shooting to try and pin point the problem. Most of the parts are 20 yrs old so it may not be a bad idea to replace the regulator and the orings on the injectors.
At any rate, thanks again to all of you who responded to the plug query...
Rufus

 

[Mad-Mic]

I appreciate all the responses from you guys...there's a set of rapid fires in at present and was thinking about changing them. The problem is I'm not certain that I'm having problems with the plugs, it may be the injectors or the pressure regulator. Changed the fuel pump last week and I'm only seeing about 32 lbs of pressure at idle. I'm still doing some trouble shooting to try and pin point the problem. Most of the parts are 20 yrs old so it may not be a bad idea to replace the regulator and the orings on the injectors.
At any rate, thanks again to all of you who responded to the plug query...
Rufus

change your fuel filter for starters.

 

[Mad-Mic]

How does the wider gap effect idle and coming off idle? For yrs chevy ran .o45 gap , I have wondered why they run .035 on the vettes.

Glenn

i'm sure it had something to do with longevity. shorter gap richer burn. wider gap leaner burn. our cars came very rich from the factory. raw unburnt fuel is burned by the cat. rich cars last longer than lean cars. keeps cylinder temps down along with lubrication of the cylinder wall = longevity.

btw i've gapped upto .050 in my vette before. right now i run a .047 gap which are cut back and indexed. seems to work really well with my Accel Supercoil also.

if you notice in nitrous cars they usually run a gap in the .030-.035 range and 2 degree cooler plugs. this helps keep the cylinder temps down and run it a bit rich to be on the safe side so a wider gapped hotter plug would burn a hole in the piston under a nitrous run.