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Messages - EricJameson

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Engine Theory / Re: Williams Helical Camshaft
« on: March 19, 2013, 02:27:04 AM »
I have seen this cam system develop from design to testing as the Helical Cam place is near where I live.   It runs and performs just as you see it on the website - the fuel savings at part throttle are amazing but as HC themselves say - it may not be quite so spectacular with a full-size EFI engine.   
 As you say it won't fit a 4AGE Toyota.   The head layout has to be something like the Nissan SR series of engines - which has slightly unusual valve gear - four lobes on each cam, forked finger followers etc.   I have been told by HC that they are planning to build a system to fit the SR series engine.  If I remember correctly - the SR puts out a bit more power than the equivalent inverted bucket type of Nissan engine.   Realistically I think any engine with the HC would have to have a new head with something like the Nissan SR/SuzukiGSX valve gear layout.       
 

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