Head Gaskets for #317 heads with stock bore?
#1
TECH Regular
Thread Starter
Join Date: May 2003
Location: Jacksonville, FL
Posts: 404
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a set of #317 casting 6 liter aluminum heads and will be running either a 3.902 or 3.905 bore. Boosted obviously..
Some people seem to like the layed 4.040 bore GM gaskets
Others say go with cometics.
I'd prefer the thickness to be around .055 - .060
What headgaskets have you guys had luck with on similar setups?
Some people seem to like the layed 4.040 bore GM gaskets
Others say go with cometics.
I'd prefer the thickness to be around .055 - .060
What headgaskets have you guys had luck with on similar setups?
#6
TECH Regular
Thread Starter
Join Date: May 2003
Location: Jacksonville, FL
Posts: 404
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by Pro Stock John
I am:
6.0 heads
6.0 MLS head gaskets
3.905 bore LS6 block
6.0 heads
6.0 MLS head gaskets
3.905 bore LS6 block
I looked back and found someone claiming they were 1.33mm compressed thickness. That converts to .052
Can anyone confirm this?
Part numbers?
![Winky](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_wink.gif)
TIA.
Trending Topics
#9
TECH Fanatic
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Have had nothing but problems with Cometic Gaskets lately. I wouldn't touch them with a 10 ft pole. Am switching to GM MLS now.
I forget the 5.7L bore size. I've heard different bores quoted.
6.0L MLS bore above per PSJ I believe.
I forget the 5.7L bore size. I've heard different bores quoted.
6.0L MLS bore above per PSJ I believe.
#10
TECH Senior Member
iTrader: (48)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
must use a 4" bore gasket with the 6.0 heads unless you want them to leak.
i had trouble with my first set of cometics, but this one i have on now is doing alright.
If you dont need a specific thickness/GM thickness would work for you , get them
if you need a specific thickness use the cometics.
i had trouble with my first set of cometics, but this one i have on now is doing alright.
If you dont need a specific thickness/GM thickness would work for you , get them
if you need a specific thickness use the cometics.
#11
TECH Regular
Thread Starter
Join Date: May 2003
Location: Jacksonville, FL
Posts: 404
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by Speedfab
Get off internet, weld heads to block. That will make your thickness somewhere around .000 ![Thinker](https://ls1tech.com/forums/images/smilies2/thinker.gif)
![Thinker](https://ls1tech.com/forums/images/smilies2/thinker.gif)
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
#12
TECH Regular
Thread Starter
Join Date: May 2003
Location: Jacksonville, FL
Posts: 404
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks guys,
My compression ratio will work out to 8.5:1 with the .054 compressed height 6.0MLS gaskets so I'll stick with them.
This is off topic with my orginal question, but how many of you are using ARP main studs? At $160 or so dollars are they worth looking into?
My compression ratio will work out to 8.5:1 with the .054 compressed height 6.0MLS gaskets so I'll stick with them.
This is off topic with my orginal question, but how many of you are using ARP main studs? At $160 or so dollars are they worth looking into?
#15
TECH Regular
Thread Starter
Join Date: May 2003
Location: Jacksonville, FL
Posts: 404
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by Pro Stock John
I am using ARP main studs and those fancier H11 head studs made by someone else.
Who makes the H11 head studs? What's different about them?