Um........Yeah.
Well into Heads/Cam
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
Well into Heads/Cam
Well started tearing into the car about a week ago mainly working late at night or weekends.
Had to clear one project outof the garage in order to make room to work on the vette.
Spent a good amount of time last week making the home made ramps to get the vette up the recommended height for installing the LG Street headers.
Parts List
Ported LS6 Heads 228cc/64cc (http://www.competitionproducts.com/p...=WEGWALS6243K2)
Comp Cam 224/231 .582/.591
LS2 Intake and TB ported here (using an LS2 because we got a good deal on the intake tb and injectors)
1.8 Rockers
LG Street headers and cats
Melling oil pump
and all the other odds and ends to make it work
After pulling the heads almost every piston had markings from the intake valve, and that comes as a suprise.
So we flycut every piston and checked the PTV last night, and there was enough clearance with the new heads.
We also checked the lift with the rockers on and max lift turned out to be around .649, and when checking the springs we can go to around .670 safely.
Now there is more work to do with the heads as they came with a slight ridge and we are going to do some backcutting and working with the valves.
I will update more with pictures later as we go..
Had to clear one project outof the garage in order to make room to work on the vette.
Spent a good amount of time last week making the home made ramps to get the vette up the recommended height for installing the LG Street headers.
Parts List
Ported LS6 Heads 228cc/64cc (http://www.competitionproducts.com/p...=WEGWALS6243K2)
Comp Cam 224/231 .582/.591
LS2 Intake and TB ported here (using an LS2 because we got a good deal on the intake tb and injectors)
1.8 Rockers
LG Street headers and cats
Melling oil pump
and all the other odds and ends to make it work
After pulling the heads almost every piston had markings from the intake valve, and that comes as a suprise.
So we flycut every piston and checked the PTV last night, and there was enough clearance with the new heads.
We also checked the lift with the rockers on and max lift turned out to be around .649, and when checking the springs we can go to around .670 safely.
Now there is more work to do with the heads as they came with a slight ridge and we are going to do some backcutting and working with the valves.
I will update more with pictures later as we go..
Banned Scam/Spammer
Joined: Jul 2006
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From: Simi Valley CA
You fly cut the pistons... with the pistons in the block.. and the block in the car? 
btw.. my garage looks about the same. My 67 Bonneville got pushed into the 3rd car garage so I could work on the vette. lol.
btw.. my garage looks about the same. My 67 Bonneville got pushed into the 3rd car garage so I could work on the vette. lol.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
Yes the flycutting was done in the block, but we made sure to carefully remove any shaving. Before everything is assembled I will oil and wipe down every cylinder so it shouldn't be a problem.
The heads are a very nice set and so are the springs, we just got suprised at how much lift we end up seeing with the rockers.
The heads are a very nice set and so are the springs, we just got suprised at how much lift we end up seeing with the rockers.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
The LS2 TB is massive compared to the stocker
The rockers which open very very quick. I'm hoping the springs aren't going to be to stressed being opened so quickly.
I also snapped a few quick photos of the heads but I am no artist when it comes to photography(I forgot to take pictures where we had to mill some aluminum because the pushrods needed a little more room)...
The quality of the LG headers is amazing, with very nice welds and a great finish. They are deffinately a show piece for the engine bay.
I will try to post up the flow numbers of the heads that I got from our flow bench later..
Now any estimates on power?
The rockers which open very very quick. I'm hoping the springs aren't going to be to stressed being opened so quickly.
I also snapped a few quick photos of the heads but I am no artist when it comes to photography(I forgot to take pictures where we had to mill some aluminum because the pushrods needed a little more room)...
The quality of the LG headers is amazing, with very nice welds and a great finish. They are deffinately a show piece for the engine bay.
I will try to post up the flow numbers of the heads that I got from our flow bench later..
Now any estimates on power?
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
I would be very happy with a number like that. Would anyone else worry because of the .649 lift even though the springs are capable? Anyone else run lift that high on the street?
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Le Mans Master
Joined: Jun 2006
Posts: 6,979
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From: Wichita KS
Also I think you will be much happier with a LS6 intake and a LS6 ported TB over the LS2 set-up. The LS6 intake will out flow a LS2 even after is ported (but not by much)
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
take the larger lift, 591. divide by 1.7=347.7 multiply * 1.8=626
If your springs were mic'd on the head for proper installation height, you'll have .023 to spare. If not, you might want to go ahead and do it, because you're pretty close.
If your springs were mic'd on the head for proper installation height, you'll have .023 to spare. If not, you might want to go ahead and do it, because you're pretty close.
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
We bought the LS2 manifold because it came with TB and the injectors for a very good price so we couldn't pass it up. With the rockers and springs on we put and indicator on the valves to see the travel as we turned the motor over. That is where I got the .649 lift on the exhaust valve.
Banned Scam/Spammer
Joined: Jul 2006
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From: Simi Valley CA
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 892
Likes: 1
From: Pittsburgh PA
Just measure the desired cut, then make each one the exact size of the last.
The rockers might be a different ratio than 1.8 because of the lift observed when installed on the motor, along with the fact that they are rip offs of Comp's. They were supposed to be Comp Cams but the fact that they don't have any designation on them nor do they have the ratio stamped on them. So one could guess there is a chance they might be a different ratio
The rockers might be a different ratio than 1.8 because of the lift observed when installed on the motor, along with the fact that they are rip offs of Comp's. They were supposed to be Comp Cams but the fact that they don't have any designation on them nor do they have the ratio stamped on them. So one could guess there is a chance they might be a different ratio
