LS6 243 heads
LS6 243 heads So I have a 98 Formula with 806 heads. I just bought these off of ebay.
http://cgi.ebay.com/ebaymotors/ws/eB...SA%3AUS%3A1123
What do you guys think? They have some small blemishes but I figured that the MLS gasket would fix it. They are alot better than the blemishes I have seen on some and for 350 I would not pass it up.
I intend to replace the springs with the Z06 springs I have in my 806 heads, would you guys advise doing so?
Thanks
http://cgi.ebay.com/ebaymotors/ws/eB...SA%3AUS%3A1123
What do you guys think? They have some small blemishes but I figured that the MLS gasket would fix it. They are alot better than the blemishes I have seen on some and for 350 I would not pass it up.
I intend to replace the springs with the Z06 springs I have in my 806 heads, would you guys advise doing so?
Thanks
They are 243 heads but not LS6 heads. LS6 243s got the lightweight valves and only came on '02-'04 Z06 'Vettes and '04-'05 CTS-Vs. You bought LS2 243s, but still seems like a good deal to me. Just have a machine shop do a cleanup pass on the deck and new/known springs are always a good idea. Good luck,
Larry
Larry
Last edited by VIPRETR2; Jun 13, 2009 at 07:56 PM.
so i will basically have the same thing if I put the sodium filled valves in there?
How will the performance be as is if I only have the deck cleaned and the springs added?
I believe that they are the same airflow specs with the exception of the valves?
How will the performance be as is if I only have the deck cleaned and the springs added?
I believe that they are the same airflow specs with the exception of the valves?
TECH Enthusiast
Joined: Jul 2004
Posts: 546
Likes: 1
From: Washington
Yes, if you upgrade the valves, you will basically have an LS6 head. It's not a performance upgrade; it's just that your reliability is slightly better and you are less likely to get knocking when there is extreme heat soak in the engine while road racing. If that's not in your repertoire, I would just go with a better spring.
Use an LS7 spring set or aftermarket spring set like those from texas-speed so you can support a high-lift cam. [I happen to have a set of LS7 springs with seat/seals + retainers if you're interested.]
Given that those blems are not on the sealing interface, you might not even need to clean up the deck, but it's certainly not a bad idea.
Use an LS7 spring set or aftermarket spring set like those from texas-speed so you can support a high-lift cam. [I happen to have a set of LS7 springs with seat/seals + retainers if you're interested.]
Given that those blems are not on the sealing interface, you might not even need to clean up the deck, but it's certainly not a bad idea.
thanks. I'll prob just upgrade using my ls6 springs. I'm running the ls6 cam and dont plan on taking her fully apart again.
As for the valves, I think ill upgrade them....at least ill feel better about them
As for the valves, I think ill upgrade them....at least ill feel better about them
Swapping to the 243's over the 806's won't be a huge performance gain, but it will certainly pick up some power. I'm sure you have already thought about needing a pair of center-bolt valve covers and brackets. FYI, we do offer cylinder head porting using customers' existing cylinder heads. We could set them up as a PRC stage 1.0 LS6 cylinder head, which would include full CNC porting, CNC valve job, pressure testing, milling, valve back-cut, and assembly. If you supply the cores, you would be looking at $824.99 + shipping. This would be with you supplying the valve springs for assembly. We can upgrade the heads to a dual spring kit if you'd like. It's completely up to you. Even if you don't want to spend the money on the porting, let us know if we can help you out on any of the items needed for the swap, such as head bolts, gaskets, etc.!
Trevor
Texas Speed & Performance
Trevor
Texas Speed & Performance
__________________
I wont have the money at this time for a port. I would be interedted in getting the covers and a coil bracket.
I've been looking but on ebay ppl want like 75 bucks for the covers and 50 for the brackets.
So if you have a set let me know ur price and hopefully I can get them this week.
When I can save some money I may take you up on the port job. The wife is already bitching that I got the heads.
I've been looking but on ebay ppl want like 75 bucks for the covers and 50 for the brackets.
So if you have a set let me know ur price and hopefully I can get them this week.
When I can save some money I may take you up on the port job. The wife is already bitching that I got the heads.
Trending Topics
TECH Fanatic
iTrader: (70)
Joined: Oct 2005
Posts: 1,219
Likes: 0
From: Los Angeles, California (818)
They are 243 heads but not LS6 heads. LS6 243s got the lightweight valves and only came on '01-'04 Z06 'Vettes and '04-'05 CTS-Vs. You bought LS2 243s, but still seems like a good deal to me. Just have a machine shop do a cleanup pass on the deck and new/known springs are always a good idea. Good luck,
Larry
Larry
not all z06 243s came with light weight valves, i think 01 and 02 243s z06 heads didnt come with the lightweight valves.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Larry
Edit: I adjusted my original post. '01 Z06s had a less aggressive cam, regular valves, and weaker valvesprings. Thanks for the heads up.
Last edited by VIPRETR2; Jun 13, 2009 at 07:56 PM.
Registered User
Joined: Jun 2009
Posts: 8
Likes: 0
From: Jacksonville Fla.
