[Z06] ls6 heads
Thread Starter
Intermediate
Joined: Jan 2006
Posts: 34
Likes: 0
From: PITTSBURGH PA
ls6 heads
Looking for some more power . been checking out some heads. I seen from mast motorsports Rectangular Port LS3 11 Degree . They say they will work on the ls6 engine. any input?
Race Director
Joined: Apr 2004
Posts: 16,135
Likes: 5
From: Newberry FL
Cruise-In VIII Veteran
St. Jude Donor '07
Not sure about the LS3. I was under the impression the LS3 ports do not mate well with our LS1/6 cars. But I haven't looked to far into that.
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
AFAIK, they'll bolt on, but you're gonna need a LS3 intake manifold/TB setup, and then probably a conversion kit so it'll work with you car's computer. Lots easier to buy cathedral port heads, like CNC'd 243s, or Trickflow (my choice) or AFRs. If you have a Z, you already have good heads, with lightweight valves, so you can send them to TEA, and get them modified, and save some cash.
Drifting
Joined: Apr 2003
Posts: 1,389
Likes: 10
From: Jacksonville FL
AFAIK, they'll bolt on, but you're gonna need a LS3 intake manifold/TB setup, and then probably a conversion kit so it'll work with you car's computer. Lots easier to buy cathedral port heads, like CNC'd 243s, or Trickflow (my choice) or AFRs. If you have a Z, you already have good heads, with lightweight valves, so you can send them to TEA, and get them modified, and save some cash.
100%
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
243 heads are still a far better head then LS3 heads. Look at some AFR 215 heads or Trick Flow.
There are a few tuners taking LS3/ L92 heads off the LS3 engines and replacing with PP 243 heads and getting better HP and TQ
There are a few tuners taking LS3/ L92 heads off the LS3 engines and replacing with PP 243 heads and getting better HP and TQ
Melting Slicks
Joined: Dec 2006
Posts: 2,186
Likes: 2
From: Woodinville WA
The LS3 heads might work OK in an all out race application for high RPM use. But the port volume on the LS3 head is large which means low flow velocity and will rob your throttle response and low end torque production. Not good for a street car IMO.
Drifting
Joined: Apr 2009
Posts: 1,898
Likes: 9
From: Morrisville PA
Yes, which is exactly why it is designed for a larger displacement engine (6.2). I see similar results from GTO guys putting them on their cars. The cars just aren't that fast after the swap. It is not all about max power, which some people never understand. 243's or 799's ftw for us 5.7 guys.
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Team Owner
Joined: Sep 2003
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From: Raleigh / Rolesville NC
