USMC_Turbo6
Well-Known Member
- Joined
- Dec 13, 2009
Who makes the better head gasket: Cometic Gasket or RJC Racing?
The better head gasket
- Thread starter USMC_Turbo6
- Start date
If you're looking for total "seal", go with the RJC's, the Cometics tend to act like a fuse and blow before the pistons, rods, or bearings let loose.
KL Mallender
Certified Dumb****
- Joined
- Apr 16, 2007
If you are still learning about tuning and wish to limit damage, stay with OEM or replacement graphite coated gaskets.
Either way you go, remember that the bolt threads in the block are exposed to the cooling system, so they need sealant on the threads(teflon tape for me)
Kevin.
Either way you go, remember that the bolt threads in the block are exposed to the cooling system, so they need sealant on the threads(teflon tape for me)
Kevin.
jarredsoon
Member
- Joined
- Aug 9, 2007
Both are great gaskets! I have used both and don't have a favorite, yet..... Rjc is messy to install. Cosmetic you have to spray with copper. Both very very tough like said above.
KL Mallender
Certified Dumb****
- Joined
- Apr 16, 2007
Jason never said things were easy, effective being the operative word to use, hehe
Kevin.
Kevin.
jarredsoon
Member
- Joined
- Aug 9, 2007
Yes rjc gaskets are very effective!!!!
I've never hurt either gasket and not hurt the engine. You must have left a couple bolts out on the ones that fused on you
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
And a piston,couple of push rods and...
KL Mallender
Certified Dumb****
- Joined
- Apr 16, 2007
That was flat out ugly looking there Phoneguy 
bad porn will scare people, lol
Kevin.
bad porn will scare people, lolKevin.
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
That was flat out ugly looking there Phoneguy
Kevin.
LOL.
It was heartbreaking when I pulled the intake thinking I blew a head gasket, I think my heart stopped. I knew what the wife would say... AGAIN!!!!!!!! WTF
KL Mallender
Certified Dumb****
- Joined
- Apr 16, 2007
LOL, brother, she probably say's "WTF" everytime you walk toward the garage, I know mine did.
Kevin.
Kevin.
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
USMC_Turbo6
Well-Known Member
- Joined
- Dec 13, 2009
Wow phoneguy that was just nasty. How much boost where you running at time? I'm getting the parts to build my new setup and don't want that pain in the azz when it comes to head gasket. Makes me go hummmmm about them
- Joined
- Feb 18, 2006
Cometics are great but this last time I went RJC.
Cometics don't blow like fuse. They melt down. The above pics of phoneguy's motor says it all.
The problem is the same old issue we have had since day one. Not enough head bolts to keep everything clamped together. RJC's solution works great. You can pretty much forget about blowing a head gasket but you better be on the tune. Hard parts take the hit when you put a jumper across the fuse.
RL
Cometics don't blow like fuse. They melt down. The above pics of phoneguy's motor says it all.
The problem is the same old issue we have had since day one. Not enough head bolts to keep everything clamped together. RJC's solution works great. You can pretty much forget about blowing a head gasket but you better be on the tune. Hard parts take the hit when you put a jumper across the fuse.
RL
i have used them both,and they are both good headgaskets,and both will move the potential damage down into the block/piston area.if you have a stock motor,the graphite gaskets will chip and blow out before you crack a piston.once you move to the stronger head gasket,the real fun begins when you get greedy.
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
Yup pretty nasty.
The point I was trying to make is that the Cometics will seal the heads!! The issue with my motor was a boost controller that decided that i was not running enough boost, so it corrected it for me !! My fast saw 29.6 psi which is all it can see with a 3 bar map. I have no idea how high the boost actually went. It was a pretty violent event, tires spun on the street and I pedaled it and hit it again. My boost was rock steady at 22psi in NC. I only made 4 passes up there as I was having problems pushing through the lights with 0 boost. My car went 6.93 @103 with a 1.54 60', 0 boost launch at 22psi and 21* on pump gas and ALKY. The car is making good power, 555 HP 553 TQ. Blew out a wheel cylinder and had to go back to RC's shop so I could fix the brakes and tune the car on C16.It rained and I never got the C16 tune which may have saved the motor, who knows. The boost controller is coming off and I will be installing a solenoid connected to the FAST for boost control.
Bryan
Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
The problem isn't the head gasket letting go...they seal so well that something else has to let go. In my case the aluminum head melted which gave the flame a different place to travel, my gasket, block,piston,and push rods melted as an end result. I wish I would have had a stock style gasket on there that would have blown first.
Bryan
Bryan
