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#21
10-21-2021, 05:18 PM
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My 69' 350 came with notches however my 72' 455 has no notches (that I recall)... I will take another look at it when I get it back from the machine shop... but Im fairly sure there are no notches.
When I added the EDL PERF RPM heads to my .040 bore 350 I had to increase the size of the existing notches to clear the larger 2.11 intake and 1.66 exhaust valves. SPEED SAFE, NICK
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"The grass is not greener on the other side, its just fertilized with different $h!t" |
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#22
10-21-2021, 05:38 PM
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Yes, Running those heads on a 350 demand’s valve notches and even more so on the exh side then if you where running iron heads with 1.77” exh valves.
This is due to the E heads having the exh valve moved over .040” from stock . My 71 455 2 bbl block was taped for 4 bolt mains and had no valve notches, but I added them.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#23
06-09-2023, 04:43 PM
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Do the notches (bore chamfer) ever become an issue for stroked motors? It looks like the piston rings are shifted higher on the stroker pistons and might get close to the chamfer.
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#24
06-09-2023, 05:39 PM
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Yes they can be an issue. Specifically on the 67 400 blocks.
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