How did the early hemis survive the HP?
 

The 354s and 392s apparently had 2-bolt main caps, so how did their cranks survive the power produced via blowers and fuels of the 60's? Were they machined for 4-bolt caps, girdles, or something else?

Re: How did the early hemis survive the HP?
 

I would say that back in the day the early blown nitro 392 hemi's were all around the 700-1200 hp mark ?? So they survived but lots let go as well just like a stock block 440 at 1000 hp is today, it will hang together for this ????? long.


FWIW,
I have a cast crank 440 that has well over 150 nitrous passes on it, it has 2 sleeves, 7 trw pistons, 1 manley piston that I shaped myself, ran a best of 9.69 and will not die, I think its a crossed fingers thing :)

Re: How did the early hemis survive the HP?
 

I don't know the HP, but this is one of my favorite photos of drag racing. I think they said this was on hydrazine, not sure but that would make sense.

Re: How did the early hemis survive the HP?
 

some racers used 4 bolt mains many variations here some were splayed while others were not--- some used a combination of 4 bolt mains & a stud girdle--- others used just a stud girdle lots of variations in the design of the girdles---- lots of variations of mains/girdles etc to get them to live---FED 387

Re: How did the early hemis survive the HP?
 

One of the best blown engine pics ever.
Have to wonder what he was "really" thinking as he is looking down at his lower body! lol


http://classracer.com/classforum/att...8&d=1432006029http://www.nhra.com/UserFiles/image/...mber/ff217.jpg

Re: How did the early hemis survive the HP?
 

Best exploded transmission picture:


http://i132.photobucket.com/albums/q...yexplosion.jpg