mhuppertz

I am going to have my ARP studs any day now, and am going to port my head, and fire ring it while I am at it (and maybe mill off the intake log).

Anyone know the specs for fire rings? Also, what head gasket and wire size and type?

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MARK
1993 W250 Club CAB LE , HTT Stage IV/16cm, POD's, Tweaked Pump, open exhaust, NV4500, Borgeson, Detroit Locker, 3" Isspro Pyro, Surplus Boost Gauge, 3,200 Spring, BHAF, Air Lift, Luber-Finer Bypass Filter, Illegal Headlights, "clearenced" afc pin, lots of broken parts, piston lift pump, dribble filter, ~350K miles. Gear Vendors out and waiting for rebuild.. Detroit Locker.

JustRamIt91

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Nick
1991 Dodge Reg Cab CTD 2WD AUTO
AmsOil BHAF, to HE351CW to a FireStop Wrapped 4" DP to miter stack, also pump is tweaked, 3200spring, timing bumped, DennyT fuel pin.

1990 LE RamCharger CTD 4x4 Auto

1991.5 SLE Reg cab CTD 4x4 Auto
GONE

jimbo486

i'd go with a standard gasket, depending on how much you have to machine it to get it flat. fire rings and o-rings are different just so you know. o-rings require a groove in the head. fire rings require a groove in the head AND the block.

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"my name is jim, but most people call me.... jim"
- blazing saddles -

- '90 D350 LE Cab & Chassis -
- 366 Spring - M3 Fuel Pin - M&H Timing Spacer - 4x.014's - Piston LP - Banks I/C'd - Fluidampr - HTT Super 40/35 'gated 14cm -
- Stans 4" - '01 NV5600 - SB Con OFE Clutch - D70 3.54 LSD - Autometer Tach - UltraLite II Pyro & 60psi Boost -

Waiting List
- PS I/C, 3" Tubes -

263HP / 610ft. lbs. (Aug. '10)

mhuppertz

Can a standard gasket hold a bunch of boost? I am planning on twins!

jimbo486

a gasket is a gasket. studs will supply enough clamping force to keep the head from lifting. unless you wanna lower your compression, go standard.

JustRamIt91

aside from the second groove what other differences/benifits between o-ringing and fire-ringing?

JD730

O-ringing:
O-rings use the stock gasket fire ring, the are generally cut into the head on our engines, can be in the block on other engines. The grooves are cut so they center in the stock fire ring. They are small diameter hard wire, .040" to .050" in diameter and the groove is cut deep enough so you only have .009" to .012" protrusion above the surface so it will clamp the stock fire ring much tighter. Most of the performace shops will recomend this for a daily/occassional drive/play toy.


I have 3 heads I've O-ringed, 2 of them myself and I've had no trouble with them.

Fire Rings:
Fire Rings can be done a few different ways, but they all have one thing in common, the stock gasket fire ring is removed and a welded ring of soft steel made from a certain wire diameter is put in its place. The difference is where and if they have grooves, most setups cut receiving grooves in the head and block so the wire ring cuts into both. Some other setups may have a groove cut in just the block or the head and some might not have any grooves, but most setups put groove in both. The trouble with fire rings is they are very hard on the block/head surfaces, they are typically recomended for compition only setups, due to the likely hood that the normal daily driver truck see alot more heat cycles.

I have a tractor with fire rings installed and it only has the cylinder sleeve cut for fire rings, the head is flat.

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Mike
That's not a leak, its the external lubrication system.
The "Rattle Box"
93 W250 Silver Club Cab, 47RH rebuilt by me with Goerend goodies, HTB2 62/12, hydroboost brakes, plus a few other things, 424/1039, 1/4 mile 14.00@94.3mph
2000 2500, 4x4, 6 speed, 12 valve, Homemade WH1C/HX55W twins
96 2500, Club Cab, AT
93 W250 Green Club Cab, AT
92 Club Cab, AT
07 2500, Quad Cab, 5.9L, Auto (Dad's new ride)
John Deere Two Cylinders, too many to list.

JustRamIt91

ok thanks, i under stand now, thanks for the excellent explanation.