Stage 1 Z06 heads.... opinions....
03-17-2003, 11:11 AM
#1
Launching!
Thread Starter
iTrader: (4)
Join Date: Aug 2002
Location: Alongwayfromhome
Posts: 224
Likes: 0
Received 0 Likes
on
0 Posts
Stage 1 Z06 heads.... opinions.... Can't get anyone to answer the phone...
Anyhoo....
Who's got the Top Gun Stage 1 Z06 heads??? How much $$$????
STOCK Z06 Valves, the rest of the stuff can change.
Cam to go with it???
Total cost (including gaskets, etc... I'll do the install myself, but will have it tuned in my area)? With flycutting the pistons if necessary?
Anyhoo....
Who's got the Top Gun Stage 1 Z06 heads??? How much $$$????
STOCK Z06 Valves, the rest of the stuff can change.
Cam to go with it???
Total cost (including gaskets, etc... I'll do the install myself, but will have it tuned in my area)? With flycutting the pistons if necessary?
03-18-2003, 07:25 AM
#2
Launching!
Thread Starter
iTrader: (4)
Join Date: Aug 2002
Location: Alongwayfromhome
Posts: 224
Likes: 0
Received 0 Likes
on
0 Posts
Re: Stage 1 Z06 heads.... opinions.... HOLY BUCKETS.
I know everyone loves the garbage can lid valves and cams that can leap tall buildings.....
... but doesn't ANYONE out there have an interest in Stage 1 Zo6 heads????
I know everyone loves the garbage can lid valves and cams that can leap tall buildings.....
... but doesn't ANYONE out there have an interest in Stage 1 Zo6 heads????
03-18-2003, 07:37 AM
#4
TECH Veteran
Join Date: Aug 2002
Location: Hartsdale, NY
Posts: 4,055
Likes: 0
Received 0 Likes
on
0 Posts
Re: Stage 1 Z06 heads.... opinions.... What is a Stage 1 head?
See our sponsor SDPC for NEW NOT USED assembled Linfelter ported LS6 heads with stock valves...
...cost is $980 per head fully assembled with NO CORE charge!
I ordered mine last week but have not decided on a cam yet...(They are often out of stock since they sell 60 pairs per month!!!!)
...now looking at TR reverse split 230/224 114 lift = 560, however, i'm not sure about a potential clearance problem as heads are milled .055...
..anyway these heads flow over 310 at 550 lift...
...there have been some Excel spreadsheets on flow bench numbers for various aftermarket heads including these ....the top heads flow similarly but these are new castings, do not require a core charge and cost less than other used ported LS1/LS6 heads that require core charges...basically a no brainer...anyway you may want to bag the stock LS6 springs depending upon the cam choice but that is a negligible cost...
See our sponsor SDPC for NEW NOT USED assembled Linfelter ported LS6 heads with stock valves...
...cost is $980 per head fully assembled with NO CORE charge!
I ordered mine last week but have not decided on a cam yet...(They are often out of stock since they sell 60 pairs per month!!!!)
...now looking at TR reverse split 230/224 114 lift = 560, however, i'm not sure about a potential clearance problem as heads are milled .055...
..anyway these heads flow over 310 at 550 lift...
...there have been some Excel spreadsheets on flow bench numbers for various aftermarket heads including these ....the top heads flow similarly but these are new castings, do not require a core charge and cost less than other used ported LS1/LS6 heads that require core charges...basically a no brainer...anyway you may want to bag the stock LS6 springs depending upon the cam choice but that is a negligible cost...
03-18-2003, 09:08 AM
#6
Launching!
Thread Starter
iTrader: (4)
Join Date: Aug 2002
Location: Alongwayfromhome
Posts: 224
Likes: 0
Received 0 Likes
on
0 Posts
Re: Stage 1 Z06 heads.... opinions.... My thoughts for Stage 1 Z06 heads vs. Stage 2 heads are these:
1) The extra size of the valves in a Stage 2 head is not worth the extra weight of the valves for my power goal (over 400 rwhp on a Mustang dyno with NO dyno trick nonsense).
2) Since I have set a reasonable power goal (a touch over 400 rwhp), the lightest valve that can make the power is the best valve.
3) The cam match-up can make up for much of the difference in port and valve sizing. I can open the valves quicker (steeper ramps) and keep the valvetrain under control at higher rpm, again due to the lighter valves.
4) Finally, reliability... a broken valve spring is bad news. I don't want any. Ever.
5) GM knew what it was doing when they kept the valve size constant on the Z06 and lightened them. Remember, they could have done anything they wanted to because the Z06 heads and valves were being re-tooled anyway. They choose to go with a lighter valve.
So, here's the plan:
Stock Z06 valves.
S1 ported heads.
Lighter and stronger retainers and locks.
Better springs than stock Z06 springs.
A well designed cam for the application and power goal - I'm willing to fly-cut the pistons if necessary.
Will the S1's be as powerful as a full-book S2? No.
Do they have the potential to put down 400-425 rwhp numbers more reliably and more durably? I believe so.
Besides, when I put in new pistons, rods and rod bolts and a 100-150 shot on it and eat Vipers and BPU+ Supras as light snacks, nobody is going to care what the valve size is.
What do ya think? Post opinons please!
PS - Joe, thanks a ton for your reply, please check your mail. You're the guy I was hoping to hear from.
1) The extra size of the valves in a Stage 2 head is not worth the extra weight of the valves for my power goal (over 400 rwhp on a Mustang dyno with NO dyno trick nonsense).
2) Since I have set a reasonable power goal (a touch over 400 rwhp), the lightest valve that can make the power is the best valve.
3) The cam match-up can make up for much of the difference in port and valve sizing. I can open the valves quicker (steeper ramps) and keep the valvetrain under control at higher rpm, again due to the lighter valves.
4) Finally, reliability... a broken valve spring is bad news. I don't want any. Ever.
5) GM knew what it was doing when they kept the valve size constant on the Z06 and lightened them. Remember, they could have done anything they wanted to because the Z06 heads and valves were being re-tooled anyway. They choose to go with a lighter valve.
So, here's the plan:
Stock Z06 valves.
S1 ported heads.
Lighter and stronger retainers and locks.
Better springs than stock Z06 springs.
A well designed cam for the application and power goal - I'm willing to fly-cut the pistons if necessary.
Will the S1's be as powerful as a full-book S2? No.
Do they have the potential to put down 400-425 rwhp numbers more reliably and more durably? I believe so.
Besides, when I put in new pistons, rods and rod bolts and a 100-150 shot on it and eat Vipers and BPU+ Supras as light snacks, nobody is going to care what the valve size is.
What do ya think? Post opinons please!
PS - Joe, thanks a ton for your reply, please check your mail. You're the guy I was hoping to hear from.
03-18-2003, 09:25 AM
#7
Re: Stage 1 Z06 heads.... opinions.... Your building exactly what I've been thinking about for a loooong time.I bet it flys and makes great power too.
But that cam is not gonna work with the 02 springs.I wouldnt run over 540 lift with the 02 spring and a XER lobe.
Just be careful with cam selection..
Good luck
JS
But that cam is not gonna work with the 02 springs.I wouldnt run over 540 lift with the 02 spring and a XER lobe.
Just be careful with cam selection..
Good luck
JS
Trending Topics
03-18-2003, 10:29 PM
#10
Banned
iTrader: (54)
Join Date: Nov 2001
Location: Grants Pass, OR
Posts: 1,816
Likes: 0
Received 0 Likes
on
0 Posts
Re: Stage 1 Z06 heads.... opinions.... Guys, this is exactly what I'm gonna run this year. I have enough time on the flow bench with the manifold attached to know the size of the valve doesn't need to be bigger. Bigger valves & big flow numbers sell heads....but I'm gonna sell heads with real world performance come this spring!
The combo will look something like this... LS6 heads, 2002 valves, Rev dual springs/titanium retainers, BIG CAM between 230-236 degrees with .600+ lift and the heads will be milled the MAX within the confines of the cam.
I've run 10.8 now with Stage I LS1 heads with crappy stock 98 intake valves and a less than desirable 224/224 .535 .535 lift non aggressive lobe cam. So who knows what will happen this year. Maybe even get to run in some decent DA.
The combo will look something like this... LS6 heads, 2002 valves, Rev dual springs/titanium retainers, BIG CAM between 230-236 degrees with .600+ lift and the heads will be milled the MAX within the confines of the cam.
I've run 10.8 now with Stage I LS1 heads with crappy stock 98 intake valves and a less than desirable 224/224 .535 .535 lift non aggressive lobe cam. So who knows what will happen this year. Maybe even get to run in some decent DA.
