CorvetteForum - Chevrolet Corvette Forum Discussion

C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Differences between L98 and LTx heads?

Thread Tools
 
Search this Thread
 
Old Jan 6, 2010 | 05:06 PM
Share
  #1  
steve40th's Avatar
steve40th
Thread Starter
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Default Differences between L98 and LTx heads?
Is there a difference that can be overcome within the differences? Just thought I would look into wether you can mount L98 Heads (better and cheaper AFR selctions for example) onto an LTx engine.
Pictures are always a good way to show the difference.
Reply
0
Old Jan 6, 2010 | 05:13 PM
Share
  #2  
STL94LT1's Avatar
STL94LT1
Race Director
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Default
I remember Tom Wong telling me about an LTx engine he was working on that had SBC heads. Seems like the conversion price for the heads was $300 or $400.
Reply
0
Old Jan 6, 2010 | 06:25 PM
Share
  #3  
rodj's Avatar
rodj
Le Mans Master
25 Year Member
 
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Default
Would be the reverse of this ? Scroll down
http://www.fullsizechevy.com/forums/...gen-1-sbc.html

Would have to make coolant holes in the heads to match LTX block and redrill intake bolt pattern
Last edited by rodj; Jan 6, 2010 at 06:28 PM.
Reply
0
Old Jan 6, 2010 | 08:45 PM
Share
  #4  
steve40th's Avatar
steve40th
Thread Starter
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Default
Doesnt look like a lot to do, as 3-4 hundred bux is about 4 hours of work.
Reply
0
Old Jan 6, 2010 | 11:30 PM
Share
  #5  
96GS#007's Avatar
96GS#007
Race Director
 
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
Default
...also have to address the fact that the LT1 intake is dry while the Gen 1 heads flow coolant thru the intake and there is a steam vent line at the rear of the LT1 heads but not the Gen 1 heads. The steam line is due to the reverse flow cooling.

Hell of an experiment to save $300 only to find out the cooling flow is fubar'ed and you overheat the engine. JMO
Reply
0
Old Jan 6, 2010 | 11:56 PM
Share
  #6  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Default
Cheaper to buy the LTx head
Reply
0
Old Jan 7, 2010 | 11:16 AM
Share
  #7  
steve40th's Avatar
steve40th
Thread Starter
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Default
Makes sense to just go with LTx heads. I wish GM would have just stuck with GENI tech, for the most part.
Reply
0
Old Jan 7, 2010 | 11:43 PM
Share
  #8  
88BlackZ-51's Avatar
88BlackZ-51
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default
Originally Posted by steve40th
Makes sense to just go with LTx heads. I wish GM would have just stuck with GENI tech, for the most part.
Yeah. I wish they would of stuck with the Gen1 period. No opti crap!
Reply
0
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-3

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Jan 7, 2010 | 11:46 PM
Share
  #9  
steve40th's Avatar
steve40th
Thread Starter
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Default
Originally Posted by 88BlackZ-51
Yeah. I wish they would of stuck with the Gen1 period. No opti crap!
I am thinking a 91 Six speed, aftermarket block, 427... HMMM
Reply
0
Old Jan 7, 2010 | 11:47 PM
Share
  #10  
88BlackZ-51's Avatar
88BlackZ-51
Race Director
Photogenic
Photoriffic
Liked
 
Joined: May 2003
Posts: 10,749
Likes: 41
Default
Originally Posted by steve40th
I am thinking a 91 Six speed, aftermarket block, 427... HMMM
That sounds about right, or you could go with a 421.
Reply
0
Old Jan 7, 2010 | 11:55 PM
Share
  #11  
steve40th's Avatar
steve40th
Thread Starter
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Default
The 427 Bill Mitchell engines sound good. A friend had one here in Hawaii in his C3. Super Sweet.
Reply
0

Get notified of new replies

To Differences between L98 and LTx heads?

Tags
Back to Subforum
C4 Tech/Performance
View Next Unread
engine temp




Click for Advanced Search
Reply Closed Thread Share
Forum Jump
Trending Topics

All times are GMT -4. The time now is 02:47 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE