350 SBC Crankshaft Advice
 

Hi all,

I went looking through the tech specs to see if NHRA added any aftermarket replacement crankshafts for Pontiacs, which they did not.

So I went over to the tech specs for a SBC crankshaft and I found this crankshaft which is a Callies SAF113-CM listed as an NHRA legal replacement crankshaft for a 350 / 305 SBC in STOCK Eliminator.

Turned down flange, lightening holes in all rod journals, pendulum type counterweights and bull nosed…….

I don't understand the NHRA logic.

Take a look and see what you think????????????

Re: 350 SBC Crankshaft Advice
 

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 !

Re: 350 SBC Crankshaft Advice
 

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!

Re: 350 SBC Crankshaft Advice
 

I agree that an improvement in windage helps HP . The crank is definitely part of that equation , baffling is part of that too . However that crank was approved , just needs to apply to all makes . Someone just took the initiative to send a crank in , and ask for approval .

Re: 350 SBC Crankshaft Advice
 

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

Re: 350 SBC Crankshaft Advice
 

Why not send a light Pontiac Crank in for approval before complaining. Somebody went to that trouble to get that approved. As hard as it would be to find Pontiac cranks, it may be easier to get approved.

Re: 350 SBC Crankshaft Advice
 

You have that backwards...Take additional weight off off the counterweight to make up for the lightened journal..

Re: 350 SBC Crankshaft Advice
 

I don't think that Callies would be interested in duplicating that SBC in to 400ci Pontiac piece..

Maybe they could sell 20 a year vs a SBC...They get the economy of scale

Re: 350 SBC Crankshaft Advice
 

I evidently need more education about this!

Re: 350 SBC Crankshaft Advice
 

Yup , Thought backwards on that one !

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.

Re: 350 SBC Crankshaft Advice
 

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.....

Re: 350 SBC Crankshaft Advice
 

Hi John,

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

Re: 350 SBC Crankshaft Advice
 

Bob you are just causing mayhem ! LOL

Re: 350 SBC Crankshaft Advice
 

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

Re: 350 SBC Crankshaft Advice
 

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

Re: 350 SBC Crankshaft Advice
 

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.

Re: 350 SBC Crankshaft Advice
 

I have 800 Pontiac cranks. Your move.

Re: 350 SBC Crankshaft Advice
 

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

Re: 350 SBC Crankshaft Advice
 

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

Re: 350 SBC Crankshaft Advice
 

Does this question imply that NHRA won't approve a crankshaft for a Pontiac?

Re: 350 SBC Crankshaft Advice
 

Just some sarcasm, Todd. To my knowledge no-one has ever asked for one.

Re: 350 SBC Crankshaft Advice
 

Frank,
I went thru this process to get the Callies crank approved. Dwayne Boes from Callies brought several cranks to Bruce Batchelder in 2015 and the 305/350 was approved.

Rod

Re: 350 SBC Crankshaft Advice
 

Rod
Thanks for the legwork getting the crank approved am sure many appreciate it. When I called Callies they had no interest in stock eliminator.

Wanted to use the Scat crank because it's strong enough and reasonably priced but could not get them to do anything with Bruce just excuses so I bought one from them directly, they did give me a nice discount and worked with Pat C as Bruce was retiring.

Was not a difficult process.

Re: 350 SBC Crankshaft Advice
 

Rod, does this Callies part number come with the legal extra .013 stroke or is that an option?



Jimmy Parker

Re: 350 SBC Crankshaft Advice
 

Jimmy, they do not offer the extra stroke. I bought one about 3 months ago and asked, for the third time. I asked them at PRI a couple of times if they'd offer it.

Re: 350 SBC Crankshaft Advice
 

Thanks Alan,


I guess the next questions are, which is better new trick of the week crank or an old STOCK unmodified crank with the extra .013 stroke?

Jimmy

Re: 350 SBC Crankshaft Advice
 

Jimmy,
If your not going to stroke the Callies I would leave the stoked crank in. JMHO

rod

Re: 350 SBC Crankshaft Advice
 

Just got a call from Callies and they declined to produce a Pontiac crankshaft built in the same configuration as the SBC pix that I posted.

I was thinking if it would be OK to take a 55 pound Pontiac crank and tie wrap the SBC crank to it and submit it to NHRA tech for approval???

It's difficult to get companies to commit to a production run for a low number of sales and that's why you have Comp Eliminator type cranks in Stock..

Build it and they will come...

That way when everybody has a Lightweight Callies SBC crank in their Stock Eliminator car the playing field will be level for the SBC again.

Re: 350 SBC Crankshaft Advice
 

Bob. I think Callies made this 305 & 350 Crankshaft, for sprint cars, they a 305 & 360 class`s & Speedway Motors in Lincoln, Ne. sells them.

Re: 350 SBC Crankshaft Advice