Here’s info from my old 1986 TRW performance catalog.
It shows the standard forged 2262 piston as fitting all 67 to 69 4 bbl motors including the RAIII as having the 250 gram pin, and optional is the P1206 pin that weighs in at 192 or 194 grams depending on where you look in the catalog!
The catalog list part number 2398 piston as being for a RA4 motor only and comes fitted with the P1206 pin.
When you go to the piston spec section of the catalog both part number pistons are exactly the same in every respect but for what pin they ship out with.
Even in regards to how much the pistons weight which is strange!
This leads me to ask if the basic RA4 piston itself is stouter then we have been lead to believe!
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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!
Last edited by steve25; 02-22-2021 at 06:32 PM.
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