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riv187 · 05-22-2014, 04:40 PM

I race a 400 bored 60 over. 509 casting.I built it with a tight budget but am making 565hp and turning 7200. 14.1-1 compression,,scat 5.7 pro rods,eagle 3.75 crank,icon ft pistons,regular 5/64 gapped total seal rings at .020. EQ iron 220 23* heads, elgin1090 mech flat tappet cam,msd,and hilborn on methanol. Block is filled to front freeze plug holes,stock caps,studs top/bottom. Std volume m55 pump. Felpro MLS gaskets. Transbrake leaving at 2500 with 5100 stall convertor. We where unable to use torque plate at my friends shop 'cause his didn't fit the large 4.185 bore. I finished the cylinders at .005" for the icon pistons. Didn't want them loose and banging cylinder walls.The engine has about 100 passes now. Runs well and beating Big blocks costing $10,000 more than the $3000 invested and a leftover 400 block this cost me.
Pay attention to details,,Mine is .003 on mains,.035 rear,.027 on rods.The deck is .000-.004. Current gaskets.051. Timing 34*. torques 70lbs heads and mains. The studs up top hopefully are taking the extreme pressure off the common thread cracking places. The cement is good for bottom end but the 2" of water at top is still keeping it cool enough on methanol/injection and small radiator in our hot FL heat. The deck clearance and timing are aimed at preventing detonation. too much deck is bad,,and too much timing is too.
I've read over and over..that about 600hp is safe limit of the 400. That was part of the plan. I pushed the compression at 14-1 and have 250lbs compression..but she's working and Wallace calculators show 550-565 from my slips and weight.
Brian

05-22-2014, 04:40 PM	#2
riv187 Junior Member Join Date: Jan 2014 Posts: 1 Likes: 0 Liked 0 Times in 0 Posts	Re: 406ci SBC I race a 400 bored 60 over. 509 casting.I built it with a tight budget but am making 565hp and turning 7200. 14.1-1 compression,,scat 5.7 pro rods,eagle 3.75 crank,icon ft pistons,regular 5/64 gapped total seal rings at .020. EQ iron 220 23* heads, elgin1090 mech flat tappet cam,msd,and hilborn on methanol. Block is filled to front freeze plug holes,stock caps,studs top/bottom. Std volume m55 pump. Felpro MLS gaskets. Transbrake leaving at 2500 with 5100 stall convertor. We where unable to use torque plate at my friends shop 'cause his didn't fit the large 4.185 bore. I finished the cylinders at .005" for the icon pistons. Didn't want them loose and banging cylinder walls.The engine has about 100 passes now. Runs well and beating Big blocks costing $10,000 more than the $3000 invested and a leftover 400 block this cost me. Pay attention to details,,Mine is .003 on mains,.035 rear,.027 on rods.The deck is .000-.004. Current gaskets.051. Timing 34*. torques 70lbs heads and mains. The studs up top hopefully are taking the extreme pressure off the common thread cracking places. The cement is good for bottom end but the 2" of water at top is still keeping it cool enough on methanol/injection and small radiator in our hot FL heat. The deck clearance and timing are aimed at preventing detonation. too much deck is bad,,and too much timing is too. I've read over and over..that about 600hp is safe limit of the 400. That was part of the plan. I pushed the compression at 14-1 and have 250lbs compression..but she's working and Wallace calculators show 550-565 from my slips and weight. Brian