Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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I was looking into AFR alu heads and 190cc with i guess 68cc CB chambers are looken nice for $1250 shipped My Q is Thunder Racing has the heads and they said:
"Note 305ci requires 1.940-1.550 valves for bore clearance."
And the heads come "2.020 intake and 1.600 exhaust" standard. What should I get to get bore clearance for my LO3 and how much is it thanx guys
I should also mention i will get the heads after i get a new exhaust, headers, LT1 cam, intake manifold and 1.5RR.
I wouldn't run those heads no matter what on a 305, plus the 6 8cc chambers will lower compression excessively!
__________________ LT1 headed LG4 305 beast! Comp Solid lifter XS-262-10S, 1.6 Roller Rockers, 10.2:1, Holley 4160 600cfm, modded Weiand 7502 intake to fit LT1 heads____ Custom cylinder head cooling. Weiand 8208 Short Water Pump____TH-350 3 series 3.73 with 2 series posi and spacer____ Hedman Hedders 1 5/8 headers and Y-pipe 3in Exhaust, Dynomax 3" Bullet muffler ____Moroso Ultra 40 Wires ACCEL HEI Super Coil ____Competition Engineering 3120 Bolt-on SFC's____Homemade: Wonderbar, solid tie rod sleeves, Aluminum LCA and Panhard Rod with spherical rod ends, alternator and PS bracket, Strut tower brace, and Decoupling torque arm with telescoping link.
3000lbs
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The problem with a 305 and good heads, is that the bore is so small, that the valves aren't entirely above it. They tend to hang over the edge a bit. And when that happens, they smack into the top of the block when they open, instead of going down into the cylinder. Not suitable for racing.
__________________ "So many Mustangs, so little time..."
You mean like a "poor-man's" splayed/canted valve setup? Where only the faces of the valves are splayed? Who needs all that expensive casting and machining, anyway?
My Q is 
