Quote:
D wrote:
You know whats weird Dodgeman that the early toyota 2t or any early t series engine used the hemi design. Then toyota improved the design in the 3t turbo version because of the limit in compression the design had and used twin spark plugs back in the late 70s in racing and early 80s in production. Meaning that Chrysler Dodge or whatever chev arrss kicking company has 25 years later done the same thanks to toyota figuring out that twin plugs and slightly less valve angle with higher ports will allow high comp to be used without piston clearance and interferrence issues.
The chrysler engine was available with 12 to 1 compression by 1966 & the twin plug heads were in use by the early 70's
My 1976 Direct Connection 'Special Parts Catalog' lists the alloy D6 twin plug head as part number P3614487
Chrysler was well aware of the advantages of high compression & the twin plug layout in the mid to late 60's
In 1964 they had a prototype four valve, twin overhead cam 426 Hemi in the test cell. This one used the toothed Gilmer belt for camshaft drive, which was years ahead of the industry. [They had Bendix EFI as an option in '58 too]
Only one engine was ever made, & it is in private hands today. It was being developed to counter the Ford 427 SOHC engine, but the production two valve pushrod hemi whiped it's arse anyway, so development was not continued.
Now we have the Chrysler 6.1 hemi. The legend lives anew.
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