cometic headgasket or HR headgasket
#21
Registered User
iTrader: (19)
https://my350z.com/forum/forced-indu...head-lift.html
(I think this is when Japtrix stopped using Cometic H/G's on VQ motors.)
(I think this is when Japtrix stopped using Cometic H/G's on VQ motors.)
Just look at the description on the cosworth gaskets from Sharif's site:
"Cosworth Stopper Ring Headgasket VQ35 96mm .6mm Pr. #16229
A must for high boost engines, Cosworth high performance head gaskets use multi aters of stainless steel for increased strength. The outer layers are embossed with a flouroelastomer rubber material designed to meet the demands of harsh sealing environments and load conditions. These new style gaskets incorporate a stopper ring structure, just like the very popular HKS headgaskets. Cosworth Gaskets feature a "folded stopper" layer for additional torque around each cylinder. The width of the sealing area is specific for each application, thereby providing ultimate sealing properties. "
A lot has changed since 2006 and I do remember hearing the cosworth gaskets were rebadged cometics. 3 yrs later, I don't think that is the case.
#28
Registered User
iTrader: (16)
Join Date: Mar 2004
Location: Nashville, TN
Posts: 2,939
Likes: 0
Received 0 Likes
on
0 Posts
I did 19psi for a year on stock DE gaskets and L17 studs. Never had a problem. Now have HR and L19, but havnt started it yet . I will be sure to test them out for everyone.
Last edited by thawk408; 10-22-2009 at 04:12 PM.
#31
Professional
iTrader: (2)
Sylvan Lake, check these out. The are listed as having the folded stopper layer:
http://www.theboombopshop.com/Produc...tCode=20000906
#32
Registered User
iTrader: (23)
Sylvan Lake, check these out. The are listed as having the folded stopper layer:
http://www.theboombopshop.com/Produc...tCode=20000906
http://www.theboombopshop.com/Produc...tCode=20000906
thank you, I found out the new Cometic "Fusion Gasket" are not recommended for street cars. So its nice to see another option, after tear down i will see if a sleeve dropped or if the head just lifted.
#35
New Member
iTrader: (2)
I went with HR gaskets and HR head bolts, 15psi and so far no issues, I also really think the modification of the blocks cooling passage is very beneficial, this coming from my Miami weather, and no heating issues at all!
I have about 4 to 5k miles on my build and have been beating on it everyday as well as some track use (drag), my estimated power is 400-450whp (no dyno time yet)
I have about 4 to 5k miles on my build and have been beating on it everyday as well as some track use (drag), my estimated power is 400-450whp (no dyno time yet)
#37
New Member
iTrader: (8)
Join Date: Jan 2007
Location: terre haute, IN; STL, MO
Posts: 6,457
Likes: 0
Received 7 Likes
on
6 Posts
bringing this back from the dead:
does anyone have an exact picture where it needs to be machined? The picture from JWT just shows a small section of the head and i'm not sure what part it is.
I would like to try the HR gaskets if it will help out on cooling. I've used cometic before but i'm tired of replacing expensive gaskets. Unfortunately i'm hoping to push this engine up to 700hp on e85 so i hope the HR gaskets hold.
does anyone have an exact picture where it needs to be machined? The picture from JWT just shows a small section of the head and i'm not sure what part it is.
I would like to try the HR gaskets if it will help out on cooling. I've used cometic before but i'm tired of replacing expensive gaskets. Unfortunately i'm hoping to push this engine up to 700hp on e85 so i hope the HR gaskets hold.
#39
Registered User
do you think that it is possible to incorporate the Pathfinder cooling mod with the HR head gasket and run the cooling return line through the center (under the intake runners) similar to how the HR and GTM [http://www.gtmotorsports.com/product.php?productid=16924&cat=275&page=1] have the cooling mod set up?
i think i might try this...
i think i might try this...
#40
350Z-holic
iTrader: (34)
do you think that it is possible to incorporate the Pathfinder cooling mod with the HR head gasket and run the cooling return line through the center (under the intake runners) similar to how the HR and GTM [http://www.gtmotorsports.com/product.php?productid=16924&cat=275&page=1] have the cooling mod set up?
i think i might try this...
i think i might try this...