stock LS1 heads worked to 70cc?
#1
Staging Lane
Thread Starter
Join Date: Dec 2002
Location: Birmingham Al
Posts: 78
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Can this be done AND still have a good flowing, decent head for 15-17#. What about the quench too, if worked? If so, I'll skip the worked on Trick Flows and save some $2k. I need a 70cc head to get my C/R down to 9.1.
#3
TECH Fanatic
iTrader: (17)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
first of all 70cc wouldn't be a big enough combustion chamber to get you down to 9:1... Secondly people have had really good luck with the LQ9/LQ4 heads... they are 71.5cc and have the same flow characteristics as the LS6 heads... By far a better and cheaper option in my opinion... Also with the LQ9 head you're still at 9.5:1 compression with the stock flat top piston so if you want to go lower you have to get creative or go with a dished piston of some sort... Good luck..
#4
Staging Lane
Thread Starter
Join Date: Dec 2002
Location: Birmingham Al
Posts: 78
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Well...I guess I should have added this. I have a 370 iron block built and am gonna run a T70 on it to about 15#. That's why I need to get the CR down to about 9.1. I wanted to get the Trick Flows that can be worked to 70cc, getting me the desired CR. But if I can find a decent alternative on the heads, like some worked LS1/6 heads, I'll go that route and save a cupla grand.
#5
Dumb Ass Vette Moderator
iTrader: (20)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by WindWalker
I have a 370 iron block built and am gonna run a T70 on it to about 15#.
Keith
#6
Staging Lane
Thread Starter
Join Date: Dec 2002
Location: Birmingham Al
Posts: 78
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'll be using dished Wiseco pistons. I plan using meth too so I think I can obtain my goal on this motor. Anyway, can LS1/6 heads be worked up to 70cc without giving up much on the flow?
Trending Topics
#8
Dumb Ass Vette Moderator
iTrader: (20)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
WindWalker,
I assume you have already bought the pistons and are trying the bigger head chamber route to lower the compression level? If you have not bought the pistons, do the right thing on size the pistons to the match 65cc heads and 0.054" gaskets for the 9.0:1 compression level. If you have bought the pistons and need to drop the compression level, use LQ4/9 heads rather than opening up the chambers on a set of LS6 heads.
Keith