View Poll Results: Best heads for street/cruising stock 346?
02+ stock LS6 heads
16
19.05%
Stock LQ9 317 heads
24
28.57%
Patriot LQ9 stage 2 heads
44
52.38%
Voters: 84. You may not vote on this poll
Heads poll for D1SC and stock 346
Heads poll for D1SC and stock 346 Which are the best heads for D1SC with stock 346 street and cruising most of the time and no racing? I will go with one of these 3 because they fit my bugged 
Please post with the reason and not what you currently have
Thanks y'all in advance :thumbs:
-Mike@corvettestripes.com
Please post with the reason and not what you currently have
Thanks y'all in advance :thumbs:
-Mike@corvettestripes.com
Last edited by MikeC5Vert; Apr 8, 2007 at 07:07 PM.
Originally Posted by Mr.MartyStone
I voted for the 6.0 liter heads but I would upgrade springs on the heads.
Marty
Marty
? Yep, springs would need to be upgraded for sure Thanks,
-Mike@corvettestripes.com
We use the Patriot LQ9 Stage 2 heads on a lot of our builds.
http://www.exoticperformanceplus.com...Car.php?car=40
Check this one out. Bob
http://www.exoticperformanceplus.com...Car.php?car=40
Check this one out. Bob
I voted the LS6 heads. Figured those heads with a decent Cam like low to mid 220's would give the most average power for street driving.The higher comp. really wakes up throttle response and low end. Yes,it's plenty safe for pump gas if the tune is right. 
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well i dont have a ton of money and i would liek to stay safe with my stock motor. I would say anything under 500 rwhp you would stay safe. nice heads boltons and a D1 thats alot of power. Unless you do your own tuning and your good at it. What kind of power you pullin now? do you have a good fuel system?
Originally Posted by Keith
I voted LS6. With the LQ9 heads, the chamber bore is 4" bore, unlike the 3.898" bore on your 346. You would need to use 4" gaskets on the LQ9 heads.
Marty
TECH Addict
Joined: Oct 2002
Posts: 2,794
Likes: 101
From: Mefis
Originally Posted by Mr.MartyStone
Incorrect. The head gasket needs to clear the cylinder bore, not the head. So you could still use a 3.930" head gasket.
Marty
Marty
Just going off of what I read on here.
Leave the haeds on it and put valvesprings on them. You will not be limited by the heads in the hp arena. I would save the money for a forged bottom end. Then make big power on stock heads.
I am with slowhawk too, I put the smaller chamber heads on the ATI cars I do. The compression is nice for drivability, fuel econimy, and making big power. Just need to tune it right thats all. I have made over 500 to the tires with a P1-SC at only 5lbs of boost with a baby cam (215, 55o lift 115lsa area). The bottom end on a stock short block is gonna limit you long before the heads. I would spend the money on stuff that will get the power to the ground and do so w/o breaking.
I am with slowhawk too, I put the smaller chamber heads on the ATI cars I do. The compression is nice for drivability, fuel econimy, and making big power. Just need to tune it right thats all. I have made over 500 to the tires with a P1-SC at only 5lbs of boost with a baby cam (215, 55o lift 115lsa area). The bottom end on a stock short block is gonna limit you long before the heads. I would spend the money on stuff that will get the power to the ground and do so w/o breaking.
I didn't vote because I'm not sure what's best but I put on the lq4 heads for three reasons: #1, they drop the compresion so it should be a little safer on my stock bottom end, #2, I got them practicly new for $300 and #3, I just always wanted to try intalling heads
Launching!
Joined: Sep 2004
Posts: 245
Likes: 0
I've used twice Patriot Heads stage 2 LS6 and LQ9- I'm very pleased and no issues in 2 years at all!! Use the Patriot Gold Springs, they are excellent- if you need more lift than .600 then upgrade to their nex level ..650, i think....
Good luck!
Good luck!
Stock 317 is all you need and lowers CR by .5 down to 9.5 to make it a bit safer and/or allow you to run a bit more boost. They flow close to a LS6 head and are cheap to fit your budget, just make sure to upgrade the springs. Many are running these heads with serious horsepower.
Last edited by Websy21; Feb 6, 2008 at 03:00 AM. Reason: typo