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!!!

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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!!!).

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.

I could not have said it better!

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

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


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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!!!).