350 SBC Crankshaft Advice - Page 2

Signman · 07-25-2019, 09:26 AM

Few years ago was trying to get a small block chevy 2 piece seal forged crank approved so I didn't have to waste money on factory and cast cranks any more. (Started with 010 block then moved to bowtie when it was the only performance block allowed later the chevy steel crank started flexing. so I was committed.)

Called Callies and spoke to someone familiar with S/SS who told me the company had no interest in making cranks that could be approved it would mean a new line and inventory with very limited sales. Was warned that is how they would react by my buddy who bought many cranks from them over the years.

Years later the Callies crank on the list showed up can only assume an engine builder with good relations had the crank made and approved. Never personally checked to see if there actually was any inventory because was working with Scat who had a 1 piece seal crank approved on the list.

After 2 years of trying to get Scat to do the process, another case of "is the effort worth the potential business" called and purchased a crank to ship to NHRA, went through the process which was pretty simple it's on the list.

If someone wanted to go through the process of getting a Pontiac crank approved spending all the time and money you probably will be successful.

Bob Mulry · 07-27-2019, 12:13 PM

Quote:

Originally Posted by ss3011

No matter what the crank looks like , the one thing that remains the same is the bobweight . If the rod throws are drilled then extra weight has to be added to the counter weights . You might be able to get a similar crank approved for a Pontiac , which I hope you do !

Why add weight to the counterweights, weight has to be removed

What do you do with the side opposite the journal (counterweight) if the total rotating weight (bob weight + the weight of the journal) is reduced. Forget the bobweight, that's just a function of reciprocating and rod big end weigh?????

The weight is removed opposite the journal, you gain from the reduced weight of the journal side and the reduced weight caused by the removal of weight from the counterweight to balance it..

That's why a lighter crankshaft is better than a heavy crankshaft.

Make sense.....

Bob Mulry · 07-27-2019, 12:17 PM

Quote:

Originally Posted by GTX JOHN

The counterweight configuration has a very significant reduction
in windage = real horsepower gain.

I built a plexiglass side on a Mopar pan once to observe the windage.

I would kill to have a crank like that especially in my high RPM small
block combos.

That Crank is a JOKE.........I hope!

Hi John,

Nope...
Go the approved crank list and then the manufactures web site and take a look..

spike1 · 07-27-2019, 12:18 PM

Bob you are just causing mayhem ! LOL

Bob Mulry · 07-27-2019, 12:23 PM

Quote:

Originally Posted by spike1

Bob you are just causing mayhem ! LOL

I hope so...….

I just sent in a 350 horsepower nitrous plate for approval in stock. I think that it has a good chance to be approved because it doesn't need an adapter to fit under a Q-Jet...

Just take a good look at what these people have done to my Stock Eliminator..

Take care Big boy

Billy Nees · 07-27-2019, 04:57 PM

Quote:

Originally Posted by Bob Mulry

Just take a good look at what these people have done to my Stock Eliminator..

Ya know Mulry, statements like that are the reason (not the only reason) that I like you!

Bob Mulry · 07-27-2019, 07:08 PM

Quote:

Originally Posted by Billy Nees

Ya know Mulry, statements like that are the reason (not the only reason) that I like you!

Hi Billy,

You just gave me a warm fuzzy feeling.

Me being from California / Brooklyn, NY I figure that you understand me better than most..

Take care and I hope to see you at the races.

Bruce Fulper · 07-27-2019, 10:10 PM

Quote:

Originally Posted by Billy Nees

Bob, ya know how hard stock small-block cranks are to find! Pontiac stuff just falls out of trees!

I have 800 Pontiac cranks. Your move.

Billy Nees · 07-28-2019, 08:46 AM

Quote:

Originally Posted by Bruce Fulper

I have 800 Pontiac cranks. Your move.

And this is a good reason for NHRA to NOT give Pontiac Racers an aftermarket crank why?

Bob Mulry · 07-28-2019, 03:36 PM

Quote:

Originally Posted by Bruce Fulper

I have 800 Pontiac cranks. Your move.

If they are legal and look like that Callies SBC lightweight crankshaft, I might be interested???

07-25-2019, 09:26 AM	#11
Signman Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 493 Likes: 14 Liked 199 Times in 74 Posts	Re: 350 SBC Crankshaft Advice Few years ago was trying to get a small block chevy 2 piece seal forged crank approved so I didn't have to waste money on factory and cast cranks any more. (Started with 010 block then moved to bowtie when it was the only performance block allowed later the chevy steel crank started flexing. so I was committed.) Called Callies and spoke to someone familiar with S/SS who told me the company had no interest in making cranks that could be approved it would mean a new line and inventory with very limited sales. Was warned that is how they would react by my buddy who bought many cranks from them over the years. Years later the Callies crank on the list showed up can only assume an engine builder with good relations had the crank made and approved. Never personally checked to see if there actually was any inventory because was working with Scat who had a 1 piece seal crank approved on the list. After 2 years of trying to get Scat to do the process, another case of "is the effort worth the potential business" called and purchased a crank to ship to NHRA, went through the process which was pretty simple it's on the list. If someone wanted to go through the process of getting a Pontiac crank approved spending all the time and money you probably will be successful. __________________ Frank Ferrucci ?/SA 1271

07-27-2019, 12:18 PM	#14
spike1 Junior Member Join Date: May 2006 Posts: 96 Likes: 120 Liked 53 Times in 16 Posts	Re: 350 SBC Crankshaft Advice Bob you are just causing mayhem ! LOL