piston to valve clearance prob...HELP!

goodyear1984 · 03-06-2007, 04:44 AM

hey you need a min of .100 with steel rods and .130 with alum rods...and im guessing u have a stock bottom end so your looking at .100 .....get some good springs so theres no valve float...good luck

Rev · 03-06-2007, 06:16 PM

I spin my 306 to 6000 rpm quite frequently with no problems over the last 10 years. It is balanced and uses forged TRW flat top pistons. It does use stock rods but with stronger after market Pioneer rod bolts. I think the piston speed is around 2700 f/sec. It's the g forces on that rotating assembly that makes it come apart. That's directly related to piston speed and the mass and strength of the components, just as Unit said.

Rev

goodyear1984 · 03-11-2007, 11:36 PM

hey rev what kind of valve train do you have

03-06-2007, 04:44 AM	#1
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: piston to valve clearance prob...HELP! hey you need a min of .100 with steel rods and .130 with alum rods...and im guessing u have a stock bottom end so your looking at .100 .....get some good springs so theres no valve float...good luck __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

03-06-2007, 06:16 PM	#2
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: piston to valve clearance prob...HELP! I spin my 306 to 6000 rpm quite frequently with no problems over the last 10 years. It is balanced and uses forged TRW flat top pistons. It does use stock rods but with stronger after market Pioneer rod bolts. I think the piston speed is around 2700 f/sec. It's the g forces on that rotating assembly that makes it come apart. That's directly related to piston speed and the mass and strength of the components, just as Unit said. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

03-11-2007, 11:36 PM	#3
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: piston to valve clearance prob...HELP! hey rev what kind of valve train do you have __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

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