Were there different model 241 heads?
Thread Starter
Joined: Nov 2005
Posts: 786
Likes: 0
From: Dallas, TX/Orlando, FL
Were there different model 241 heads? I have a friend that says he has a set of 241s that I can have but they are the earlier model? He said he thinks the difference is the valve covers? Was there 2 diff models of the 241 heads? Thanks
806 and 933 were the early style ls1 head with perimeter bolt valve covers. 853 and 241 were the late style ls1 head with center bolt valve covers. The ports, valves and combustion chamber sizes were the same all throughout.
Thread Starter
Joined: Nov 2005
Posts: 786
Likes: 0
From: Dallas, TX/Orlando, FL
Thanks for all the info. So from what I gather here, I can have my friend do some machine work to them and they'll be just the same as if I had a set of worked over 241's? I just need the correct valve covers. Would there be anything better about the 241s?
And this is off topic from the OP, but what is the size diff between 241s and 243s? Trying to do my research before I chose the heads for my car. Thanks again
And this is off topic from the OP, but what is the size diff between 241s and 243s? Trying to do my research before I chose the heads for my car. Thanks again
Thanks for all the info. So from what I gather here, I can have my friend do some machine work to them and they'll be just the same as if I had a set of worked over 241's? I just need the correct valve covers. Would there be anything better about the 241s?
And this is off topic from the OP, but what is the size diff between 241s and 243s? Trying to do my research before I chose the heads for my car. Thanks again
And this is off topic from the OP, but what is the size diff between 241s and 243s? Trying to do my research before I chose the heads for my car. Thanks again
243s are mainly off ls6s and ls2s. Valves are the same size compared to the above castings however the ports are larger (210cc vs 200cc and 75cc vs 70cc) and the combustion chambers are smaller (roughly 64cc to 66cc). All other things equal, the smaller chambers will give u about .4 points in added compression.
Thread Starter
Joined: Nov 2005
Posts: 786
Likes: 0
From: Dallas, TX/Orlando, FL
Sry I'm on my phone typing all this and guess I typed it all out wrong. I was just asking if there was any benefit to getting the 241 heads I have on my car machined over getting the heads he has (806 or 943) machined but it seems like it wouldn't be any different. And you answered my question bout the 241 v. 243 so that does it. Thanks for your help.
Trending Topics
Thread Starter
Joined: Nov 2005
Posts: 786
Likes: 0
From: Dallas, TX/Orlando, FL
That's the plan. I was going to take my 241s off and put these heads on, then have him work my 241s and build them for a cam off the car then when I have everything to (re)build my car put them on.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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
