1987 L98 Spark plugs cross reference chart?
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
1987 L98 Spark plugs cross reference chart?
Hi,its been really hard to find the FR5LS Spark plugs and Summit got them on ebay but i ask and their answers to my questions are just automated,they answers what they want to answer,not my actual questions.-
Im in need for a brand new set of spark plugs for my L98 (with alum heads ) and i need a cross reference chart....
whats the FR5LS (Which i was told are the correct plugs) on NGK or other brands ? What's your favorite ?
Please help !!!!
thanks !
ps : my mods : Hypereuctectic flat top pistons,ZZ4 Camshaft...just for the record i dont know if i have to use another kind of spark plug since i upgraded the compression ratio with the new pistons
Im in need for a brand new set of spark plugs for my L98 (with alum heads ) and i need a cross reference chart....
whats the FR5LS (Which i was told are the correct plugs) on NGK or other brands ? What's your favorite ?
Please help !!!!
thanks !
ps : my mods : Hypereuctectic flat top pistons,ZZ4 Camshaft...just for the record i dont know if i have to use another kind of spark plug since i upgraded the compression ratio with the new pistons
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
i couldnt find any info,they look for part # and i guess FR5LS or FR3LS are not part numbers ...ok ok
Which are the correct spark plugs for my L98 w/alum heads ?
AC DELCO : ? ____________
NGK : ? ____________
MOTORCRAFT : ? ____________
AUTOLITE : ? ____________
Other brand ? ____________
Please someone help me fill the blanks,im getting close to start the car for the first time and i dont have the time to buy them overseas (Im in Chile) because it will take at least 2 weeks to get here and i need to start it before April 20th H E L P !!!!!!
Which are the correct spark plugs for my L98 w/alum heads ?
AC DELCO : ? ____________
NGK : ? ____________
MOTORCRAFT : ? ____________
AUTOLITE : ? ____________
Other brand ? ____________
Please someone help me fill the blanks,im getting close to start the car for the first time and i dont have the time to buy them overseas (Im in Chile) because it will take at least 2 weeks to get here and i need to start it before April 20th H E L P !!!!!!
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Ok i just found out this from BOSCH and :
And another chart here :
Which should i believe ...use ...trust....which one its better ???
But look at the Champion...they show different spark plugs !
i want the best of my engine,and i dont want to ruin it using inadequate spark plugs!
And another chart here :
Which should i believe ...use ...trust....which one its better ???
But look at the Champion...they show different spark plugs !
i want the best of my engine,and i dont want to ruin it using inadequate spark plugs!
Last edited by Calderone; Apr 9, 2008 at 10:44 AM.
Racer
Joined: May 2006
Posts: 426
Likes: 16
From: Concord CA
just got to the CSKAuto.com, Autozone.com or any of the online parts stors...and pull up your application for your year and engine.. that should list almost all of the plugs to fit your 87/L98..
Try this for a starter..
http://www.partsamerica.com/ProductL...pe=960&PTSet=A
or
http://www.autozone.com/N,16200033/N...eResultSet.htm
Try this for a starter..
http://www.partsamerica.com/ProductL...pe=960&PTSet=A
or
http://www.autozone.com/N,16200033/N...eResultSet.htm
Last edited by bczee; Apr 9, 2008 at 10:57 AM.
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
i just got my set of 41-629's from the bay !
Browsing thru AC-Delco's site i found this
I purchased 41-629,what's the difference with rapidfire or platinum plugs ?
Will my engine be OK with the 41-629's ? it does not say ALUM Heads over them !!!!
Browsing thru AC-Delco's site i found this
I purchased 41-629,what's the difference with rapidfire or platinum plugs ?
Will my engine be OK with the 41-629's ? it does not say ALUM Heads over them !!!!
Last edited by Calderone; Apr 9, 2008 at 12:32 PM.
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Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
You can tell the difference between a spark plug for an aluminum head and a cast iron head by comparing the two plugs. The cast iron will have a short area of thread. The aluminum plug will have a longer threaded area and they usually have a washer on the bottom of the threaded area. Here are 2 examples.
Cast Iron heads
Aluminum heads
Cast Iron heads
Aluminum heads
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Yes, i know but does the 41-629 Its OK for my heads ?
thanks
it looks OK from what i see...
i got confused because of the application chart on post #8
http://forums.corvetteforum.com/show...16&postcount=8
But they seem OK ...what you think ?
thanks
it looks OK from what i see...
i got confused because of the application chart on post #8
http://forums.corvetteforum.com/show...16&postcount=8
But they seem OK ...what you think ?
Last edited by Calderone; Apr 9, 2008 at 12:53 PM.
