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Old 07-09-19, 03:25AM   #76
turbo louie
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Ive never seen anything like that ! Wow
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Old 07-09-19, 03:44PM   #77
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I was there that day that it blew up but in the stands watching the racing
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Old 07-09-19, 04:34PM   #78
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Safe place to be.
Never liked sitting down by the top end though 'cause that's where the parts really go flying. LOL

That type of damage is why the NHRA no longer allows ANY cast blocks in the fuel classes.
Top alcohol would be a real gamble on a cast block.
Guys still running nostalgia dragsters are still using cast blocks.
Longevity depends on the boost and/or percentage of power adder applied to the fuel, paying attention to the tune up and paying attention to what the parts are telling you.

All the rods , pistons & cranks tend to get heavier in those classes.
They have to be as the power levels increase.

After a while the bores on the cast block will start to "bell mouth".
Start getting past that magic 1000hp to 2000hp number and the designs have to change to meet or exceed the added stresses.

Billet blocks w/ replaceable sleeves. That' how it has evolved and currently that's how it is done to get any kind of service life out of the parts.

Great article on pistons in the current issue of ND.

Ross
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CP-Carillo

You tell them what you are going to do with the engine and they will design the piston for the power level you are trying to achieve and the method being used to get there.
They also need to know the crankshaft & rod info.
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Old 07-09-19, 05:10PM   #79
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Bushel basket full of parts. Nice cast crank
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Old 07-09-19, 10:58PM   #80
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No filler in that block either but the crank letting go like that the filler would not have made any difference.
For what it all initially costs that kind of junk does not bring much money when it goes over the scales.

Maybe it'll come back from China as cookware , a cast replacement crank or an anchor . LOL
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Old 07-09-19, 11:23PM   #81
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Default Not a Pontiac but a cast aluminum hemi block

These pics are of Eddie Hill's famous engine explosion.
The block was a cast aluminum dedicated top fuel racing block considered state of the art at the time.

Eddie said he took delivery of the block from the manufacturer not knowing it was defective/had casting flaws.
It was doomed from the start. Nitro finds all the weak pieces.
This is what led to the ban on cast blocks for these types of race cars.
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Old 07-10-19, 12:23AM   #82
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WOW! Disaster...He was a Pontiac in his early years
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Old 07-10-19, 02:07AM   #83
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That happened twice to him in 1999 at two consecutive events. The concussions were so great they caused damage to his spine. Both times the cast blocks were at fault.

After that second explosion he decided to hang up his fire suit for good.

https://bangshift.com/bangshift1320/...uel-pass-ever/

This is a guy that raced everything . Street cars,motorcycles, dragsters and set records in drag boats and and top fuel cars.
First gasoline powered dragster to top 200 mph in 1966 (twin engined Pontiac).
He's been inducted into numerous motorsports halls of fame.
The stuff of legend.
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Old 07-10-19, 02:56AM   #84
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Yup thatís what I remember twin engine Pontiac definitely a Legend
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Old 07-26-19, 01:00PM   #85
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I just stumbled into this thread...according to my builder my current shortblock is good for 7500rpm and 900 hp ...I'm not even close to that..it was built by Mike Voycey with 40 plus years..Hardblocked to the freeze plus, crower steel rods,light CP pistons, cryo'd crank, program eng caps..and assembled by Mike..and he supervised the machine work..
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Old 07-26-19, 02:58PM   #86
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Yeah I know of Mike through Bob Maxey. The three of us bought a set of Rock & Roll CNC ported E-heads. Mike pretty sharp guy.
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Old 07-26-19, 09:44PM   #87
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Quote:
Originally Posted by Gach View Post
Yeah I know of Mike through Bob Maxey. The three of us bought a set of Rock & Roll CNC ported E-heads. Mike pretty sharp guy.
Your talking about the ones that were just smoothed with a sandpaper roll
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Old 07-27-19, 12:03AM   #88
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Exactly ! Guy was a rip off. Paid him $1400.00 for CNC port work. That was suppose to go to Air Flow Research for CNC work. I ended up sending them to Brandywine. They got them to flow 330 cfm.
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