1988 c4

Reply Subscribe

Thread Tools

Search this Thread

Mar 31, 2008 | 09:09 PM

mjstan

Thread Starter

Heel & Toe

Joined: Mar 2008

Posts: 18

Likes: 0

1988 c4

hello everyone, I'm hoping someone will tell me which are the best spark plugs to use on the aluminium heads and why. Thanks for your help.

Last edited by mjstan; Apr 1, 2008 at 06:27 PM.

Mar 31, 2008 | 09:23 PM

Aardwolf

Race Director

Joined: Jun 2004

Posts: 13,961

Likes: 707

From: WI

ACDelco FR5LS

http://store.summitracing.com/partde...5&autoview=sku

A good plug for a good price, you don't need a fancy expensive plug.

Mar 31, 2008 | 09:28 PM

CorvetteMike2024

Corvette Enthusiast

Joined: Oct 2007

Posts: 6,797

Likes: 2,721

From: So. Cal.

2025 C7 of the Year Finalist- Unmodified

2024 C7 of the Year Finalist - Unmodified

2023 C7 of the Year Finalist - Unmodified

Anti seize

Make sure and use anti seize lube!!!

Mar 31, 2008 | 09:31 PM

Calderone

Le Mans Master

Joined: May 2007

Posts: 8,448

Likes: 27

From: Valparaiso

what's the best for the 87 ?
i did a search and no ACDELCO were available for the 87
strange

Mar 31, 2008 | 09:34 PM

65Z01

Team Owner

Joined: Dec 2000

Posts: 90,675

Likes: 304

From: SE NY

Cruise-In II Veteran

Quote:

ACDelco FR5LS

That's what I've always used in my '88, with cut back electrodes of course.

Mar 31, 2008 | 10:15 PM

pkazsr

Le Mans Master

Joined: Jul 2007

Posts: 5,356

Likes: 2

From: No HOA, New Hampshire

Cruise-In X Veteran

St. Jude Donor '09

I read posts here yesterday that recomended AC Delco #41-629. I guess I will just replace the plugs with what are in there. (with never-sieze of course)

Mar 31, 2008 | 11:16 PM

vinnies87

Le Mans Master

Joined: Aug 2003

Posts: 9,884

Likes: 3

From: Magnolia Mississippi

St. Jude '03-'04-'05-'06-'07

Quote:

Originally Posted by Calderone

what's the best for the 87 ?
i did a search and no ACDELCO were available for the 87
strange

HuH,,, my 87, AC Delco Spitfire #5.... and yes they are available for 87/L98/350....

Mar 31, 2008 | 11:17 PM

Calderone

Le Mans Master

Joined: May 2007

Posts: 8,448

Likes: 27

From: Valparaiso

Quote:

Originally Posted by 65Z01

That's what I've always used in my '88, with cut back electrodes of course.

what's a cutback

electrode ?

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

10 Ugly Corvettes That We Still Kinda Love

Joe Kucinski

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

Brett Foote

10 Things Every Corvette Owner Needs (2026 Edition)

Michael S. Palmer

8 Most "Only Corvette Owners Understand" Quirks and Problems

Pouria Savadkouei

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Joe Kucinski

How Much Horsepower Every Corvette Engine "LOST" in 1972

Joe Kucinski

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Michael S. Palmer

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Joe Kucinski

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Joe Kucinski

8 Coolest Corvette Pace Cars (and Replicas) of All Time

Verdad Gallardo

Mar 31, 2008 | 11:46 PM

Demonic85

Team Owner

Joined: Feb 2006

Posts: 24,460

Likes: 7

From: sw Ohio

Dont use the Denso equivalent, they're crap and i'm talking about the copper tipped ones.

Apr 1, 2008 | 12:29 AM

#10

corvettedan22

Melting Slicks

Joined: Jan 2004

Posts: 2,659

Likes: 3

From: Oxford CT

I was told stock plug

Apr 1, 2008 | 12:32 AM

#11

Calderone

Le Mans Master

Joined: May 2007

Posts: 8,448

Likes: 27

From: Valparaiso

which one is the stock ?

Apr 1, 2008 | 12:41 AM

#12

85L98-84L83

Racer

Joined: Dec 2007

Posts: 486

Likes: 0

bosch platinum +4

5 hp

Apr 1, 2008 | 03:28 AM

#13

mjstan

Thread Starter

Heel & Toe

Joined: Mar 2008

Posts: 18

Likes: 0

c4 88 vette

Thanks to all that have come in on this. The FR5LS plugs were the ones I replaced (they are the recommended plugs) but I think since '88 there has been some advancement , so why would platinum or rapid fire,which are more expensive, be better ?

Last edited by mjstan; Apr 1, 2008 at 03:30 AM. Reason: spelling

Apr 1, 2008 | 09:15 AM

#14

Sam Lam

Melting Slicks

Joined: Apr 2002

Posts: 2,118

Likes: 0

From: St. Charles, MO Route 66 Corvette Club

Quote:

Originally Posted by mjstan

hello everyone, I'm hoping someone will tell me which are the best spark plugs to use on the aluminum heads and why. Thanks for your help.

Just a suggestion to you if you have not worked on aluminum heads before. Make sure the engine is cold before you attempt to remove the plugs. Otherwise, you stand a chance of stripping our the threads.

Apr 1, 2008 | 11:07 AM

#15

Aardwolf

Race Director

Joined: Jun 2004

Posts: 13,961

Likes: 707

From: WI

Quote:

Originally Posted by mjstan

I would not say they are better, just longer lasting perhaps. It's not that tough to change them so it's up to you. Pay lots of extra money for that kind of plug or spend your time and change them more often.

85L98-84L83 bosch platinum +4 5 hp, you did a dyno test on this? If your just believing what the box says, you could have lost 5 HP just as well.

Apr 1, 2008 | 11:30 AM

#16

65Z01

Team Owner

Joined: Dec 2000

Posts: 90,675

Likes: 304

From: SE NY

Cruise-In II Veteran

Quote:

what's a cutback electrode ?

Check my site for a description and pic.

Reply Subscribe