TW heads now 1/2 o-ringed - help....

DZEE'S LX · 01-08-2002, 05:05 PM

I bought a used set of ported Twisted Wedges w/o-ring grooves and recently had them checked over at a local (supposedly good) machine shop. Everything was good except we decided to surface them to flatten them up. They said I could just run the regular head gasket and that it would just fill up whatever groove was left. Since I am staying naturally aspirated I don't think I need (or need to pay extra for) the lock wire gaskets. They took off .005 in the machining. The remaining grooves range from .004 to .007 deep.

The caution flag went up when my parts house questioned the idea of using regular gaskets. Then I started digging for answers......so here's my dilema.

Trick Flow says the grooves must be .010 +/-.001 deep or don't run lockwire gaskets. If I don't want lockwire gaskets they say just have the machine shop mill down until the grooves are gone.

Fel-pro had the same story on groove depth but said be careful about intake fitup problems if you shave too much. He suggested peening copper wire into the grooves and draw filing flat.

The other option would be to regroove, but again it seems like I don't really need the grooves...

Please let me know if you have gone either way with this situation or what makes more sense.

How much can you shave and still get the intake to fit? I will be using a TFS Street intake.

Thanks,
Dan

01-08-2002, 05:05 PM	#1
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	TW heads now 1/2 o-ringed - help.... I bought a used set of ported Twisted Wedges w/o-ring grooves and recently had them checked over at a local (supposedly good) machine shop. Everything was good except we decided to surface them to flatten them up. They said I could just run the regular head gasket and that it would just fill up whatever groove was left. Since I am staying naturally aspirated I don't think I need (or need to pay extra for) the lock wire gaskets. They took off .005 in the machining. The remaining grooves range from .004 to .007 deep. The caution flag went up when my parts house questioned the idea of using regular gaskets. Then I started digging for answers......so here's my dilema. Trick Flow says the grooves must be .010 +/-.001 deep or don't run lockwire gaskets. If I don't want lockwire gaskets they say just have the machine shop mill down until the grooves are gone. Fel-pro had the same story on groove depth but said be careful about intake fitup problems if you shave too much. He suggested peening copper wire into the grooves and draw filing flat. The other option would be to regroove, but again it seems like I don't really need the grooves... Please let me know if you have gone either way with this situation or what makes more sense. How much can you shave and still get the intake to fit? I will be using a TFS Street intake. Thanks, Dan __________________ Spec Service (UHP), BFG G-Force KDW's, Turbo Coupe 3.55 rear w/disks, 73mm calipers, Stg 1 Twisted Wedges, TFS Street Intake, 70mm TB, E cam, Crane 1.7's, Aeromotive FPR, BBK 1 5/8 shorties, elec fan, FMS Al Radiator, Moroso Wires, Kenne Bell Ramair, March pulleys, Race Magnums, 190 lph Walbro, FMS Al Dshaft, D/S loop, MM 4point rollbar, FMS C spngs, strut tower brace, Tokico Illuminas, Prothane bushings, MM Lwr Conrol Arms, KB welded subs, Cervini Mach 1 hood/valence/side skirts/wing/airdam. Last edited by DZEE'S LX; 01-08-2002 at 07:14 PM..

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