TFS O-Ringer vs. Non O-Ringed Heads. Whats The Difference?

BowTie Eater 5 Liter · 02-07-2001, 11:24 PM

I dont know the difference!
Are the O-Ringed Better (They cost more)
what is the difference
Please help!!!

------------------
1988 Mustang GT, T-5
No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter (Stock Air Box, Removed air silendcer), 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).

Unit 5302 · 02-08-2001, 02:18 AM

Here's the deal on o-ringed heads. They are setup for Fel-Pro lockwire head gaskets. The o-ring is a circle groove machined into the head to help the gasket hold pressure better under forced induction applications.

Since Ford has only 4 head bolts per cylinder the deck is more likely to warp or lift under a detonation than say the Chevy, since it has 5.

The real drawback to having o-ringed heads with forced induction is that they keep the seal so well, instead of blowing a head gasket under detonation, you roast a piston. Which would you rather do? Change a head gasket, or rebuild your motor?

If your motor is tuned right with serious boost, you shouldn't need them. If it goes out of tune and detonates, I'd rather know about it in the form of a head gasket, not a piston.

Five0 · 02-08-2001, 08:12 AM

I could not have said it better!

------------------
James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft

BowTie Eater 5 Liter · 02-08-2001, 07:56 PM

thanks yall!
i think i'd rather change a head gasket over a motor.

------------------
1988 Mustang GT, T-5
No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter (Stock Air Box, Removed air silendcer), 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).

02-07-2001, 11:24 PM	#1
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	TFS O-Ringer vs. Non O-Ringed Heads. Whats The Difference? I dont know the difference! Are the O-Ringed Better (They cost more) what is the difference Please help!!! ------------------ 1988 Mustang GT, T-5 No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter (Stock Air Box, Removed air silendcer), 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).

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02-08-2001, 02:18 AM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Here's the deal on o-ringed heads. They are setup for Fel-Pro lockwire head gaskets. The o-ring is a circle groove machined into the head to help the gasket hold pressure better under forced induction applications. Since Ford has only 4 head bolts per cylinder the deck is more likely to warp or lift under a detonation than say the Chevy, since it has 5. The real drawback to having o-ringed heads with forced induction is that they keep the seal so well, instead of blowing a head gasket under detonation, you roast a piston. Which would you rather do? Change a head gasket, or rebuild your motor? If your motor is tuned right with serious boost, you shouldn't need them. If it goes out of tune and detonates, I'd rather know about it in the form of a head gasket, not a piston.

02-08-2001, 08:12 AM	#3
Five0 Registered Member Join Date: Apr 2000 Location: middleburg, fl, usa Posts: 1,134	I could not have said it better! ------------------ James Cox nochevy@hotmail.com 1991 Mustang LX 12.565 @109.38mph 1.764 60ft

02-08-2001, 07:56 PM	#4
BowTie Eater 5 Liter Registered Member Join Date: Nov 2000 Location: Maple Ridge B.C. Canada, The Best Place In The World Posts: 871	thanks yall! i think i'd rather change a head gasket over a motor. ------------------ 1988 Mustang GT, T-5 No Smog Pump (Shorty Belt), Dumps At The End Of Stock H-Pipe (Sounds Mean), K&N Air Filter (Stock Air Box, Removed air silendcer), 198.9 rwhp @4200 (235 Motor!!), 285 lbs-ft @2900 (336 Motor!!!).