[Z06] LS7 head fix package (DE)
Melting Slicks
Joined: Mar 2012
Posts: 3,341
Likes: 5
St. Jude Donor '14
This post is about a head package we offer for a great deal. We use the same bronze guides as WCCH(same supplier) and REV exhaust valves.
I respectfully ask everyone not to turn this thread into a 10 page discussion on LS7 heads and the issues surrounding them. There are already enough of those.
Thanks,
Josh Hicks
(302)838-2188
I respectfully ask everyone not to turn this thread into a 10 page discussion on LS7 heads and the issues surrounding them. There are already enough of those.
Thanks,
Josh Hicks
(302)838-2188
While a thread turning into another drama thread seems like a curse it would actually turn into a blessing for you keeping your thread bumped for weeks and getting thousands of views.
Le Mans Master
Joined: Aug 2009
Posts: 5,474
Likes: 1,069
From: Chester County Pennsylvania
2025 C5 of the Year Finalist - Unmodified
2025 Corvette of the Year Finalist - Modified
2024 C6 of the Year Winner - Modified
2020 C5 of the Year Finalist - Unmodified
This post is about a head package we offer for a great deal. We use the same bronze guides as WCCH(same supplier) and REV exhaust valves.
I respectfully ask everyone not to turn this thread into a 10 page discussion on LS7 heads and the issues surrounding them. There are already enough of those.
Thanks,
Josh Hicks
(302)838-2188
I respectfully ask everyone not to turn this thread into a 10 page discussion on LS7 heads and the issues surrounding them. There are already enough of those.
Thanks,
Josh Hicks
(302)838-2188
Melting Slicks
Joined: Dec 2007
Posts: 2,031
Likes: 4
From: Ottawa
Pro Mechanic
Joined: Oct 1999
Posts: 3,922
Likes: 1,468
From: South-Central Coast California
I read the OP with interest.
Question for Josh...
Your specs list a "three-angle valve job".
The stock seats have four angles. Can you describe the changes you make to the seats when you give each head a three-angle valve job.
Also, the stock exhaust valve has only two angles. When you add the third, what's the angle?
Lastly, I know switching to bronze guides is a common aftermarket choice but bronze guides are not as durable as the OE PM guides. In a street track duty cycle, how long should people run your heads before checking the stem-to-guide clearance?
Question for Josh...
Your specs list a "three-angle valve job".
The stock seats have four angles. Can you describe the changes you make to the seats when you give each head a three-angle valve job.
Also, the stock exhaust valve has only two angles. When you add the third, what's the angle?
Lastly, I know switching to bronze guides is a common aftermarket choice but bronze guides are not as durable as the OE PM guides. In a street track duty cycle, how long should people run your heads before checking the stem-to-guide clearance?
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Thread Starter
Former Vendor
Joined: Dec 2009
Posts: 3,353
Likes: 166
From: 19804
If we have a core set of heads to use you would be at 2 days. If you want your same head castings it will be around 2 weeks as the machine shop will have the heads for around 7 days.
Everyone with questions contact me directly. We do not do this head package as a mail order setup.
Everyone with questions contact me directly. We do not do this head package as a mail order setup.
Melting Slicks
Joined: Apr 2008
Posts: 3,243
Likes: 186
From: Fauquier, VA
I read the OP with interest.
Question for Josh...
Your specs list a "three-angle valve job".
The stock seats have four angles. Can you describe the changes you make to the seats when you give each head a three-angle valve job.
Also, the stock exhaust valve has only two angles. When you add the third, what's the angle?
Lastly, I know switching to bronze guides is a common aftermarket choice but bronze guides are not as durable as the OE PM guides. In a street track duty cycle, how long should people run your heads before checking the stem-to-guide clearance?
Question for Josh...
Your specs list a "three-angle valve job".
The stock seats have four angles. Can you describe the changes you make to the seats when you give each head a three-angle valve job.
Also, the stock exhaust valve has only two angles. When you add the third, what's the angle?
Lastly, I know switching to bronze guides is a common aftermarket choice but bronze guides are not as durable as the OE PM guides. In a street track duty cycle, how long should people run your heads before checking the stem-to-guide clearance?
"After the seats are installed, they are machined to the proper angles. On the all-important intake, starting at the combustion chamber roof, the seat angles are: 39°, 45°, 60° and 71.83° followed by a radius. The exhaust seats are cut with 38.17°, 45° and 76° angles, then a radius. In both cases, the valve face seats on the 45° portion. Each seat and radius are machined by one milling tool in a single plunge movement of the 5-axis CNC's table."
She also states that two different valve seats are used. The intake seat is made of a specific material, PMF 28, which is compatible with the titanium intake valve. The exhaust valve seat, also supplied by F-M, is Brico 3220 material, used in a variety of GM aluminum heads.
http://www.camarohomepage.com/ls7/