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Old 09-11-2010, 12:43 AM
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Amazing valve spring pressure

Not being a race car engine builder I was blown away by the numbers on this 528" 1164 hp BBC artricle in the new Hot Rod mag. Now for the new guys....mind you this is all VERY high dollar titanium Jesel RACE car valve train but it is still amazing...to me anyway.

Maybe this is normal, don't know but the Comp Cams triple valve springs have 387 lbs. on the seat!! and 1,067 lbs. open!! No wonder they have to change parts all the time on these race engines.

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Old 09-11-2010, 02:46 AM
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Quote:
Originally Posted by 327NUT
Not being a race car engine builder I was blown away by the numbers on this 528" 1164 hp BBC artricle in the new Hot Rod mag. Now for the new guys....mind you this is all VERY high dollar titanium Jesel RACE car valve train but it is still amazing...to me anyway.

Maybe this is normal, don't know but the Comp Cams triple valve springs have 387 lbs. on the seat!! and 1,067 lbs. open!! No wonder they have to change parts all the time on these race engines.
With valve lifts well over 1", along w/huge, heavy (even when made of Ti) valves and a lot of RPM makes everything so far "out there" that it DOES boggle the mind when you are used to 350 pounds of pressure- OPEN- like us!

The big, naturally aspirated IHRA Mountain Motors stretch the boundaries of what is even possible to do, from a metallurgical standpoint. Not until there are breakthroughs in materials will there be any big gains made, I suspect.

The stuff is neat to marvel at. Paying for that technology is another thing altogether.
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Old 09-11-2010, 02:30 PM
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Quote:
Originally Posted by cobalt327
With valve lifts well over 1", along w/huge, heavy (even when made of Ti) valves and a lot of RPM makes everything so far "out there" that it DOES boggle the mind when you are used to 350 pounds of pressure- OPEN- like us!

The big, naturally aspirated IHRA Mountain Motors stretch the boundaries of what is even possible to do, from a metallurgical standpoint. Not until there are breakthroughs in materials will there be any big gains made, I suspect.

The stuff is neat to marvel at. Paying for that technology is another thing altogether.

Along with break throughs in materials, it would be great to see efforts directed to more innovation in the area of desmodromics, pneumatics and most interesting the repacaement of the poppet valve with some version of a rotary system.
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