Cometic VS. HKS Headgasket
Joined: Apr 2005
Posts: 3,705
Likes: 7
From: South Florida!
Cometic VS. HKS Headgasket
It's a simple question. I've had a few shops give me different answers.
One saying that Cometic 100% fails. Another saying that cometic is the same as HKS or stock and can handle anything.
I'd appreciate some experienced shops tipping in, so maybe I can inform a not so experienced shop.
One saying that Cometic 100% fails. Another saying that cometic is the same as HKS or stock and can handle anything.
I'd appreciate some experienced shops tipping in, so maybe I can inform a not so experienced shop.
That is not a good sign, that you are researching head gaskets after having your built motor installed.
I have heard more bad things about the Cometic than good. I personally would go for the HKS because it has been proven in many high hp builds.
I have heard more bad things about the Cometic than good. I personally would go for the HKS because it has been proven in many high hp builds.
Joined: Apr 2005
Posts: 3,705
Likes: 7
From: South Florida!
With all the research I've done over the years, If the shop doesn't have the same parts list as me- I just don't know why I don't pack up and take my car somewhere else.
Unless they can convince me it's better for a large number reasons.
Unless they can convince me it's better for a large number reasons.
Joined: Apr 2005
Posts: 3,705
Likes: 7
From: South Florida!
This doesn't matter. I got screwed again. Apex Automotive is clearly a shop not fit for any work outside of an over priced oil change.
I have the worst fuscking luck.
I have the worst fuscking luck.
Registered User
Joined: Jun 2008
Posts: 419
Likes: 3
From: Florida
Eric, both Jim Wolf at JWT and Sam at GTM have recommended using the HR headgaskets. HKS also are very good, but quite a bit more expensive.
I also have not heard good things about Cometic headgaskets.
On my new build, I'm going with the HR headgaskets.
I also have not heard good things about Cometic headgaskets.
On my new build, I'm going with the HR headgaskets.
Terry - Did you happen to read that the madscientest (I forget his name) got head lift with the HR bolts. I am not sure what kind of boost he was running but I remember him running on e85 and about 600hp if I recall correctly. I know you are shooting for numbers higher than that, and seems to be the HKS and head studs are cheap insurance in the grand view of things.
Registered User
Joined: Mar 2007
Posts: 786
Likes: 8
From: Sugar Land TX/Boca Raton FL/Carefree AZ
Terry - Did you happen to read that the madscientest (I forget his name) got head lift with the HR bolts. I am not sure what kind of boost he was running but I remember him running on e85 and about 600hp if I recall correctly. I know you are shooting for numbers higher than that, and seems to be the HKS and head studs are cheap insurance in the grand view of things.
Trending Topics
Registered User
Joined: Jun 2008
Posts: 419
Likes: 3
From: Florida
Terry - Did you happen to read that the madscientest (I forget his name) got head lift with the HR bolts. I am not sure what kind of boost he was running but I remember him running on e85 and about 600hp if I recall correctly. I know you are shooting for numbers higher than that, and seems to be the HKS and head studs are cheap insurance in the grand view of things.
I'll check out his post.
As far as headgaskets, the new bores are 97mm. I'm not sure if the HKS's will fit. I beleive that GTM has been using the HR headgaskets exclusively for these builds, and I haven't heard of any issues so far on any of their motors...
I still have my L19 head studs, though, so I can use these instead of the HR head bolts. Maybe I will.
Mike, I believe that you are using the HR headgasket with the ARP L19 head studs. Is this correct?
Registered User
Joined: Jun 2008
Posts: 419
Likes: 3
From: Florida
I found MadScientist's post:
"Reason for changing kits was because after ZDayZ I found out how much power the stock HR head bolts will actually hold. After 670whp the heads will lift!! When this happened it damaged the block... "
Unless I hear that there were issues with the head bolt installation on MadScientist's build, I'll play it safe and use my L19s (luckily they never sold
and I still have them).
"Reason for changing kits was because after ZDayZ I found out how much power the stock HR head bolts will actually hold. After 670whp the heads will lift!! When this happened it damaged the block... "
Unless I hear that there were issues with the head bolt installation on MadScientist's build, I'll play it safe and use my L19s (luckily they never sold
and I still have them).
On HKS site it says that it is a 97mm bore.
http://www.hksusa.com/info/?id=3066
Cosworth I am only seeing
96mm & 98mm
Power Enterprise
97mm
Cometic
96mm
98mm
100mm
http://www.hksusa.com/info/?id=3066
Cosworth I am only seeing
96mm & 98mm
Power Enterprise
97mm
Cometic
96mm
98mm
100mm
Registered User
Joined: Mar 2007
Posts: 786
Likes: 8
From: Sugar Land TX/Boca Raton FL/Carefree AZ
Thank you for the heads up!!!!!!!!!!!!!!!!!!!!!!!!
I'll check out his post.
As far as headgaskets, the new bores are 97mm. I'm not sure if the HKS's will fit. I beleive that GTM has been using the HR headgaskets exclusively for these builds, and I haven't heard of any issues so far on any of their motors...
I still have my L19 head studs, though, so I can use these instead of the HR head bolts. Maybe I will.
Mike, I believe that you are using the HR headgasket with the ARP L19 head studs. Is this correct?
I'll check out his post.
As far as headgaskets, the new bores are 97mm. I'm not sure if the HKS's will fit. I beleive that GTM has been using the HR headgaskets exclusively for these builds, and I haven't heard of any issues so far on any of their motors...
I still have my L19 head studs, though, so I can use these instead of the HR head bolts. Maybe I will.
Mike, I believe that you are using the HR headgasket with the ARP L19 head studs. Is this correct?
