Max safe CR for Fel-Pro 8519 PT-1 bb head gasket?

Posted By: BradH

Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/11/10 05:02 PM

I'm planning to use the "standard" Fel-Pro 8519 PT-1 composition head gasket w/ my Victor heads and targeting around 10.8 CR. Is this CR w/in the acceptable safe range for this particular head gasket?

Posted By: 5spdcuda

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/11/10 05:21 PM

They will probably work, but I would use the 1000 series gaskets with aluminum heads. They are what Edelbrock recommends and I use them on my small block. Trouble free after 40,000 miles.

Posted By: mopar65

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/11/10 05:46 PM

Brad that is the head gasket that dewayne told me to use with my 11.1 440 with indy EZ heads.Mopar65

Posted By: an8sec70cuda

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/11/10 05:49 PM

They'll work fine.

Posted By: Bob_Coomer

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/11/10 07:13 PM

Years and years of abuse on a 12:1 493 with Indy heads. I reuse them also. II just dont or know anyone who has trouble sealing these big Mopar engines..

Posted By: jyrki

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 06:27 AM

Same here, several pump gas 11-12:1 engines we have used those gaskets in. Never had problems, the best one made 781 hp.

Posted By: Cab_Burge

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 08:28 AM

Brad, after blowing the Fel Pro 1009 out on the dyno my 527 bracket motor with 12.8 to 1 compression using 108 octane race gas I decided to change the head gaskest out on my 518 pump gas motor when I put the 440-1 heads on it. I had 1009 on the 518 and they look fine after a lot of reuse and abuse, they where squished out into the cylinders a tiny bit so I decided while it was apart to change them. I had sets of Cometics, Mr Gasket MLS, Fel Pro 8517PT, Fel Pro 1009 (Fel Pro 8519PT EDIT)and several sets of SCE Copper gaskets in stock that would haave work on the motor

I selected the 8519PT (edited the proper part number)

The set I measured has a 4.480 bore across the wrist pin area in the center of the bore, I lost a little bit of compression versus using the 1009 but I didn't want to take a chance of having the 1009 blow out again, regardless of the reasons

the 527 and the 518 have bores of 4.375(low deck 518 motor) and 4.380 in the 440 block 527 C.I. motor

Posted By: racingblues1426

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 11:48 AM

What is the compressed thickness of the 8517pt gasket and who makes it? Thanks

Posted By: scatpacktom

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 12:02 PM

At 10.8 I'm sure you will be fine. At 14 to 1 they blow out the front of the car on fire and burn on the track for a few minutes...That much I know

Posted By: BradH

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 04:28 PM

Quote:

What is the compressed thickness of the 8517pt gasket and who makes it? Thanks

Assuming that Jyrki made a typo and he really meant the 8519PT, it's a standard Fel-Pro BBM gasket that's approx. .040" thick and has an advertised volume of 10.9 cc, IIRC.

My reason for considering this gasket is the increased diameter of the fire ring compared to something like an FP 1009 or DG/Corteco race gasket. A 1009 won't work on my 452's 4.380" bore and I have to elongate the dowel pin slots slightly to offset the DG gasket enough to not overhang the chambers on my Stage VIs.

Posted By: Thumperdart

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 04:32 PM

I`m running the marine gasket by fel-pro going on 5 1/2 years..........plenty of clearance around the bore and the stainless fire ring.

Posted By: BradH

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 04:34 PM

Have you pulled the heads off since they were installed w/ the marine-spec gasket to see if they have been brinelled by the fire ring?

Posted By: Thumperdart

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 04:43 PM

No I havn`t...........if it aint broke don`t fix it and I`m not one to tear into my motor just to check things out. It hasn`t been apart since I built it except for a valve spring swap.

Posted By: 440Jim

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 08:38 PM

Quote:

No I havn`t...........if it aint broke don`t fix it and I`m not one to tear into my motor just to check things out.

There is something to be said for that. How many passes in those 5-1/2 years?

For a race engine, I would consider a tear down this winter if you have a bunch of passes on it. Sometimes preventive maintenance is better than a broken crank, rods, pistons, block, etc. A set of bearings and gaskets is good insurance.

Posted By: Mills

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/12/10 09:00 PM

They held up fine with my 11.1:1. Went with them for the very same reason you state - 60 over 440 wouldn't allow the other gasket to work.

Posted By: Cab_Burge

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/13/10 05:33 AM

I misstated the part number I used on my 518, tey are the 8519PT, not the 8517PT

I have edites the first post, I hope this didn't affect anyone

Posted By: Bob_Coomer

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/13/10 05:45 AM

Quote:

Quote:

No I havn`t...........if it aint broke don`t fix it and I`m not one to tear into my motor just to check things out.

There is something to be said for that. How many passes in those 5-1/2 years?

For a race engine, I would consider a tear down this winter if you have a bunch of passes on it. Sometimes preventive maintenance is better than a broken crank, rods, pistons, block, etc. A set of bearings and gaskets is good insurance.

Good points Jim I agree 100%
I actually have found my self excited to see how everything looks in a new engine after 1 season of hard runs...
The weather here is pretty crappy during the winters, cant do much, its easy to get the race car blue's, and loose some enthusiasm, or just plain old case of loss of interest. Thats why I like to work on the project over the winter, make changes, check things out...basically spend some money LOL

Back to the PT gaskets
They have a very large bore 4.52-4.53 I recommend these to the Stealth head guys cause of the large bore, they address the chamber issue shortcomings they use to have. They are near .040 thick...maybe .038-.040
No way these are only 10 cc compressed more like 13.5-14 but I would need to do some math to be positive.

Posted By: 6packattk

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/13/10 06:22 AM

I just laughed to tears on picture of that comment insighted and have only one question,what was plan b.I have had 12-1 in 3604x4 truck and found out the hard way in 80`s with vortex booster and premium gas mix hammered out bearings.Had fel pro composition gaskets in that.Curious on what gasket did work for that much squish.

Posted By: 451Mopar

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/13/10 08:56 AM

Worked fine on the old 451 with B1-B/S heads.
This is from a post I made about gaskets for the stealth heads:
If you get the Fel-Pro KS2110 gasket kit ($55 for a full gasket set from Summit Racing - minus valley tray) the 8519PT1 head gasket will fit the stealth heads. The 8519PT1 measures 4.5" bore diameter and is 0.040" thick, or about 10.4cc (calculated.)

Posted By: Thumperdart

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 08/13/10 06:06 PM

Quote:

Quote:

No I havn`t...........if it aint broke don`t fix it and I`m not one to tear into my motor just to check things out.

There is something to be said for that. How many passes in those 5-1/2 years?

For a race engine, I would consider a tear down this winter if you have a bunch of passes on it. Sometimes preventive maintenance is better than a broken crank, rods, pistons, block, etc. A set of bearings and gaskets is good insurance.

Don`t totally keep track but probably 300+ and it`s a street car that I race once in a while. I do want to freshen it up this year and port the heads a bit more and let er rip unless I find issues. Good advice...............

Posted By: SuperStock426

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 12/12/10 09:39 PM

I installed the 1009 Fel Pros on my 10.62:1 440 with Edelbrock heads..I did not re torque the heads and ended up blowing a head gasket at #8 cylinder..I am replacing them with the 8519's..So I would recommend retourqing after you put some miles on your engine..

Posted By: Chris2581

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 12/13/10 02:23 AM

Quote:

They will probably work, but I would use the 1000 series gaskets with aluminum heads. They are what Edelbrock recommends and I use them on my small block. Trouble free after 40,000 miles.

When you order the Edelbrock B/RB head gaskets,they are 8519PT's in the package.

Posted By: SuperStock426

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 12/13/10 03:51 AM

Has anyone else had the same problem of blowing a head gasket on a big block from not retorqing when using the Fel Pro perma torques?

Posted By: Cab_Burge

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 12/13/10 05:10 AM

Quote:

Has anyone else had the same problem of blowing a head gasket on a big block from not retorqing when using the Fel Pro perma torques?

Not me,I have reused both of the Fel pro numbers listed on here. I did blow a pair of the 1009 due to the fire ring hanging into the combustion chamber

Check all things during assembly carefully before getting after the tune

Posted By: BradH

Re: Max safe CR for Fel-Pro 8519 PT-1 bb head gasket? - 12/13/10 03:01 PM

Quote:

Quote:

Has anyone else had the same problem of blowing a head gasket on a big block from not retorqing when using the Fel Pro perma torques?

Not me...

Me, either, with the 1009s. I haven't run the standard Perma-Torque in so long that my experiences weren't on anything remotely like I'm building now.