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#1
11-25-2024, 09:52 AM
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The rule of Thumb I was privy to and said to me by a well known local pro stock engine builder was this.
If you have enough compression for the Cam being used then never sacrifice airflow for the sake of compression. There’s a point of very diminishing returns once a full on race motor has a compression of 12.5 to 1.
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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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#2
11-25-2024, 12:16 PM
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Len Williams built my stroked 350 using my 1970 block and 1977 6X-4 heads. Both only had minor clean-up surfacing done taking .010 off each. Pistons were Ross flat tops set at zero deck height using 6.8" rods on the 4.25" crank.
Len confirmed no issues with chamfer size and relationship to top ring position. He did say that the .502/.510 lift on the cam was getting close to the limit though. |
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