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gto65 · 02-14-2007, 02:36 PM

Other than being able to reuse the Cometic gaskets, what advantage do COmetic gaskets have over the 1016's.
I used the Fel-Pro 1016 gasket on my 455 w/e-heads 72cc's.

I did not spray anything on them, I do not know if I was suposed to or not but I have had no issues.

I am currently in the process of building a new motor and I would like to know the difference, or what is the BEST head gasket to use, money not being a issue.

Thanks

gtoroadracer · 02-14-2007, 07:18 PM

I have used both, I am currently running the cometic gasket and perfer to it as the best. How ever I also thought and heard that the cometic gaskets are reusable but when I called and ordered them directly from cometic and asked them, they said "no, the gasket were not made to be reusable". They said in a pinch you can try to reuse them but they do not reccomend it. I hope this helps.

Bruce Meyer · 02-14-2007, 08:30 PM

gtoroadracer-Nice Car!

screamingchief · 02-14-2007, 08:42 PM

Quote:

Other than being able to reuse the Cometic gaskets, what advantage do COmetic gaskets have over the 1016's.

What advantage???

You mean besides having the option of picking your bore size and compressed thickness,and getting them with or without the valve notches,or maybe even the little things like getting them with the 421 style cooling holes,or getting them without cooling holes for those "dry deck" applications.

Vs. taking the bore size and compressed thickness fel-pro decided was the best "one size fits all" choice...

The fel-pro isnt all that bad,but for smaller bore applications the 4.300" bore size leaves a lot to be desired,leaves too much "dead space" between the block and the head.

Plus if your not right at/near zero deck,you really ought to be running a thinner headgasket often,this is done to keep the piston to head clearance tighter to promote chamber "movement" or "quench",the .027" thick cometics are perfect for this scenario.

The cometics have many positive aspects IMHO.

Advantage goes to cometics,indeed!!!

60man · 02-14-2007, 09:23 PM

With a 4.350 bore I guess you have no other options anyway. I have used the Butler gaskets on staock blocks with spray cooper and have had no problems in the past...
505 dictates the Cometics the way I see it.
I have heard they were reuseable to.
Has any one on this Board reused them ???

gtoroadracer · 02-14-2007, 09:25 PM

Quote:

Originally Posted by Bruce Meyer

gtoroadracer-Nice Car!

Thank you Bruce for the compliments. Don

punisher#1 · 02-14-2007, 10:31 PM

had one of the first sets of cometics that were built with no coolant holes for a dry deck application. we made some engine dyno pulls and then started using nitrous. after about 25 nos passes we broke the ring lands on one piston, the gaskets came out fine and i reused them for another 40 or so passes until we tore the motor down for the new heads and pistons. they were just starting to show signs of burning between the cylinders, this was with a single kit tune up of 32pills and sometimes up to a 40 pill. so YES they can be reused even with the abuse of alot of nitrous.

rcush · 02-14-2007, 11:30 PM

Punisher,
Can you explain the benefits (or not) of no coolant holes and a dry deck application. Just curious, Thanks,

Bob

Herb Hagan · 02-14-2007, 11:47 PM

Blow a head gasket...
No water to be spewed out under the tires and lose control of the car
No water to get into cylinder(s) and hydrolock the motor

scott70 · 02-15-2007, 01:28 PM

I'm using the butler headgaskets on my .030 over 455 with 71cc e heads.Am I supposed to spray a coating on them??If so, I didnt know this and what am I supposed to use,and one side only or both sides?

KS circutguy · 02-15-2007, 01:33 PM

Yes Butler says to spray copper coat on the block side only.Call him for more info.

scott70 · 02-15-2007, 01:39 PM

Quote:

Originally Posted by KS circutguy

Yes Butler says to spray copper coat on the block side only.Call him for more info.

Thanks!

60man · 02-15-2007, 02:15 PM

Quote:

Originally Posted by Bruce Meyer

gtoroadracer-Nice Car!

Ditto..looks low & mean..

greggutknecht · 02-15-2007, 02:21 PM

I used the felpros on my red ventura with a 42 jet in a fogger,after about 10-15 passes it would push the compression ring out.Never used cometics but im assumming they would not experience this problem.On a non N2o motor you could probibly use either one.Greg

punisher#1 · 02-15-2007, 08:19 PM

the dry deck deal allows you to miss the nos tune up a little and if the head rattles itself loose you do not get water into the cylinders and damage the engine. my system also allows the engine to be cooled in reverse. in other words the cold water from the radiator is pumped into the heads first allowing a little more timing before dettonation sets in.

Ron Genovese · 02-15-2007, 08:37 PM

I use the Cometics because of my bore size 4.35, but used to have no problems with the felpros. I ran them on a 455 in my 67 firebird with 16 large valve heads & 13.1 compression. I also reused them multiple times with no issues!

greggutknecht · 02-16-2007, 01:00 PM

Punisher what size hoses do you use on the rear of the block i use -10 with forword flow been considering going to reverse flowthis season.Last fall had my motor in a 86 stock suspension monte and went 8.68 at 159 and some change.Greg

rcush · 02-16-2007, 05:27 PM

Quote:

Originally Posted by punisher#1

the dry deck deal allows you to miss the nos tune up a little and if the head rattles itself loose you do not get water into the cylinders and damage the engine. my system also allows the engine to be cooled in reverse. in other words the cold water from the radiator is pumped into the heads first allowing a little more timing before dettonation sets in.

Punisher,
This sounds interesting, how did you do this? Sounds like something I would like to do to my race engine, Thanks,

Bob

fieroX · 02-17-2007, 05:53 AM

I have cometics in the 3800 series II turbocharged engine thats in my fiero. I am using cometics in my 461 build also, because they are fantastic head gaskets. I run 22 lbs of boost regularly on the 3800 (dyno'd 477 rwhp, and 515 rwtq), and on one incident on the dyno, i hit 30 psi where my boost controller was mis-adjusted. No problems sealing, no blown gaskets, totally flawless. Spend the extra money, and get the cometics. Especially if you plan on making any kind of compression, or running boost, or nitrous. Hope this helps.

Rob · 02-17-2007, 02:20 PM

Cometics are the best head gaskets money can buy.

They are reuseable, but you will see the viton come off the fire rings and if the center is burnt to the stainless, its really time to buy new ones.

When building a engine, I like to get the gasket .015 or less to the edge of the bore and the piston right near the deck of the head when running(right to the edge of touching at max rpm even). Cometic's wide range of thickness choices makes decking and setting piston depth much easier. There is no added charge from .027" to .051" thick with at any of the bore diameters, anything custom made takes about two weeks to deliver. Most common used gaskets are on the shelf for next day delivery if needed.

-Rob

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