Crank for SBF SS/GT?
 

There seems to be a distortion field between the NHRA rulebook and the Accepted Products guide that either encourages cheating or discourages racing, I'm not sure which.

I was going to go with an Eagle or Scat rotating assembly to build the 302 for my SSGT 68 Mustang but I wasn't sure all the parts they included fit the NHRA specs so I'm going to put it together myself. Pistons I can figure out, Flat top with two notches that don't increase stock compression. OK. Rods. 5.090, no fancy stuff to make them light. OK.

Here's the problem: The rules state OEM or NHRA approved crank only for SS, which carries over to SSGT. When I go to the Approved Products guide, there is a grand total of ONE crank to pick from on a document titled Stock Eliminator Approved Cranks. Is every SBF in SS out there running this crank or am I missing something?

Me thinks I'm missing something...

My instinct tells me I can run any crank with the following dimensions as long as it isn't under stock weight or had voodoo specifically lined out in the rules done to it.

3.00 Stroke
Rod bearing journal: 2.123
Main bearing journal: 2.249

Thanks,

Dale

Re: Crank for SBF SS/GT?
 

Dale, you need to submit to NHRA the crank you want to use. Might not have to give them a crank, possible a link to the info about it. Talk to your div tech director about it. He can give you the name & number you need to contact.
Those approved parts are listed there because somebody (racer or mfgr) submited them for approval.

Re: Crank for SBF SS/GT?
 

Do I use the Crank Approval form for Stock Elim from NHRARacer? My tech doesn't always get back to me.

Dale

Re: Crank for SBF SS/GT?
 

This should help you understand the "Do's" and "Dont's" as regards to crankshafts in the regular Super Stock and Super Stock GT classes.

http://www.nhraracer.com/content/gen...9848&zoneid=85

Basically, if your forged crankshaft meets this criteria it should be acceptable for use.

Re: Crank for SBF SS/GT?
 

"Constantly looking for smaller and smaller details in our quest for HP..." Yup.

Thanks. I'll save that link. I'm new at this and just want to make sure I understand everything before I drop cash on a part that might get me bounced if I don't get it right. To that end I ask questions.

I'll pick a crank and send the info to Glendora.

Thanks,

Dale

Re: Crank for SBF SS/GT?
 

Not trying to be a smart a** but I have to laugh at #8

Dale surely you can contact Crower or Bryant. Personally I would speak with Greg at Rody out of Plymouth Mi

Re: Crank for SBF SS/GT?
 

Why is it funny? In the past I have seen crankshafts that have been dressed up and the surfaces either polished or treated that the seams cannot be seen.

For a Super Stock GT engine you do not need to go and spend $$$ on a Crower or Bryant crankshaft. There are more affordable crankshafts from other vendors that will do the job and more.

Re: Crank for SBF SS/GT?
 

If Scat makes one, for the money that would be my choice.

Re: Crank for SBF SS/GT?
 

we have 2 different ones in both of my SS motors one is a crower which NHRA looked at twice and blessed both times the other is a RPM off shore unit a company for which we distribute dollar for dollar we don't really see much difference between the 2 except for the cost the Crower cost was 3 times as much and took F O R E V E R to get :eek: they both balanced about the same :) both increased bearing life :)

Re: Crank for SBF SS/GT?
 

Sounds like what he needs to buy.

Re: Crank for SBF SS/GT?
 

Alex is correct about the RPM brand of crankshafts. ALthough made in China like many other makes of crankshafts under different labels, they are a good piece and they take the punishment.

Alex's 289 Ford engine is a fast, record holding, 9,000+ RPM engine and it is an example of Ukranian punishment!

Re: Crank for SBF SS/GT?
 

Thanks for the input. These are the ones that are in my budget:

Scat

Eagle

I think the Eagle is the one on the list but the numbers aren't an exact match.

The main issue I have as a first time builder is that the process for approving a part is a bit of a mystery unless you know a bunch of seasoned racers. Just a paragraph in the General section of the rules explaining the process would remove the mystery for a lot of us.

Maybe I'll just build an exploding Funny car or sideways ProMod. They seem to rate above Sportsman.

Dale

Re: Crank for SBF SS/GT?
 

RPM lists a closeout 302 forged crank for about $350.00. Might be worth a look if you can get an approval.

Re: Crank for SBF SS/GT?
 

What he said. Get an RPM crankshaft.

Re: Crank for SBF SS/GT?
 

I was laughing at the fact that there are some billet pieces out there who have never been DQ'd

Re: Crank for SBF SS/GT?
 

Hey,
I think I have what you want... The NHRA "approved:" crank, SuperStock ready.
All work done by Bullet, stroked .013, 2.00" (small chevy) rods, .010 under mains, heat treated, etc.. Crower had the rods in stock ...
New in the box never placed in a block
Check it out
http://classracer.com/classforum/showthread.php?t=50145

Re: Crank for SBF SS/GT?
 

I'll keep that in mind, Steve. It's the right part number. I won't know my exact crank specs until I get my block machined. Shipping across country (Washington State) would probably add $100 easy to that price (I'm sure it's fair). I'll let you know one way or the other. Might take a couple of weeks.

Thanks again.

Dale

Re: Crank for SBF SS/GT?
 

What does it weigh?

Re: Crank for SBF SS/GT?
 

44 lbs. before the work was done.