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#21
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Quote:
Pictured below are 1964 421 (left) and 389 pistons. The 421 used larger valve reliefs to lower compression and match the compression of 389 engines, much like how 428 engines used dished pistons to maintain the same compression ratios of 400 engines while using the same cylinder heads.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#22
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Yup, I screwed up.
First picture was labeled correctly as a '75 400 (WT) piston. Second picture was a '67 400 (YC) piston. Third picture was a '72 GTO 400 piston. Now, the new 2 pictures are of the '78 YA and X7 pistons. The flat top piston is from a '74 GTO (350).
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So long, farewell. |
#23
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I am very happy we are all having this detailed discussion beacuse my main reason for posting these questions was to try to pin down how just a Cam change and the increase in compression over the 180 hp motor made for the bulk 30 hp gain in the TA motor.
It seams that from the responses posted here that not only was the 220 hp motor underrated, but so was the 180 hp motor !
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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! |
#24
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Quote:
Not WZ, that's what my 67FB had. The 78 is an X7(?). Has XX stampings and 6X-4 hds.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
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