Stock Elem Crankshafts??
 

I am aware that there some legal cranks for stock elem for BBC engines that callies makes. but with that being said I see they have some stock type ones as well but are not listed in the NHRA approved listings. can anyone please give me the scoop in regards to if it has to be a exact part number or if they will let a ''stock looking & type slide''? I am in need for a small block chevy 1985 305C.I. Thanks in advance.

Re: Stock Elem Crankshafts??
 

It must be listed in the NHRA accepted parts list, according to the rule book. That is the definition of "NHRA accepted". There is nothing listed for a 305. There is a procedure for requesting product acceptance on www.NHRAracer.com.

Re: Stock Elem Crankshafts??
 

Ok so it does actualy have to be listed then, I had just heard from a few engine builders that it was possible to use a forged ''stock type'' and get away with it. even if it wasnt listed as approved.

Re: Stock Elem Crankshafts??
 

Several years ago, we built a 350 out of a 305 by buying new 350 pistons and a 350 block. We used a 350 piston on 305 rods and used the 305 crank.Since 305 pistons are lighter than 350 pistons, the assembly had to be re-balanced.Most of the weight came off the pistons, and some was added to the crank. If you use a steel 350 crank with Manley or even OEM rods and good 305 pistons, it should balance pretty easily,as the weight will come off the crank only, it's got plenty of weight anyway.It is dimensionally the same as the 305 crank, just heavier, but the balance job will cover that. Sounds like a good way to go!

Re: Stock Elem Crankshafts??
 

I use the 1970 LT-1 350 forged crank. It's a bit more weight than the cast 305 crank, but never had a failure or any other concerns.

Re: Stock Elem Crankshafts??
 

Thanks for the replies, but can anyone recomend a good aftermarket crank that is legal for a 305 2piece rear seal.

Re: Stock Elem Crankshafts??
 

Yes. Callies. You just have to do the legwork. Or work with an engine builder or supplier who can and will.

Re: Stock Elem Crankshafts??
 

I looked at Callies, they do offer a dragonslayer that would be great, its just not on the approved NHRA list. if there is a trick to this or something please P.M me. I realy wnt to buy the best parts for my engine so I dont have to worry about building a grenade. I used to work for a shop that built comp elem engines, but stock is a total different world from what I am use to.

Re: Stock Elem Crankshafts??
 

Not likely you will get the Dragonslayer approved but you should be able to get something nice added to the list. I have had two cranks put on the list. It take a bit of legwork, effort talking to Bruce as well as the people at Callies. Once you have all your ducks in a row it goes pretty fast.

Here is the NHRA form.
http://www.nhra.com/userfiles/file/A...val%20Form.pdf

Re: Stock Elem Crankshafts??
 

Thanks for the info, I will start looking into this more.

Re: Stock Elem Crankshafts??
 

OK, why would you need a forged crank in a 305? I would imagine the RPM level would not need a forged unit? Some people are surprised that I used a real 396 block for my 396/325 as opposed to a sleeved 454. Plus it is only a 2 bolt main. Yes I do have steel crank in it, Motor has been up to 7300, but loses power over 6400 so I don't need to go there.Made over 100 passes on that motor. Is that the same deal with those 305's ?

Remember the sreet, musclecar car show days "I have a 4 bolt main block too"

Could I dare to say sometimes we can over engineer something when it does not need it.
My buddy has run Comp for years, and yea, 10,100 RPMs big difference from a Stocker motor. Checking Valve springs after every pass, tear the motor down during week, ect.

Will Lamprecht I/SA in progess 396/325

Re: Stock Elem Crankshafts??
 

Wait a week or so... there will be a couple of 3.480 stroke cast cranks (1 Scat and 1 Eagle) added to the approved list.

Re: Stock Elem Crankshafts??
 

Not really sure it is a absolutly needed item but I hate to destroy a engine by cutting corners. I am sure it would hold up but I had just rather not chance it.

Re: Stock Elem Crankshafts??
 

What about forged, they are plenty of cast out there..

Re: Stock Elem Crankshafts??
 

400 HP, 7000 RPM, why would you put a heavier forged crank in a 305 stocker. Waste your money where you want to. I've seen many 350 SuperStock engines run a 30 year old cast crank 600 HP and 8500 RPM.

Re: Stock Elem Crankshafts??
 

I remember the aftermath of a 350 stocker motor that broke a crank,several rods, the windage tray and the pan when the cast crank broke.I also worked with a guy who was rebuilding the good 427 in his boat,but while that engine was down, he put a cast crank stock rod 402 in it with the big roller cam,heads,pan and the tunnel ram from the big motor, and went out. While hot dogging it, it blew up,and the next week at work he brought in a bag.In it were two mangled rods, one crank pin,and part of a piston. It broke on both ends of the same crank pin, and the pin and rods went through the pan and necessitated a fiberglass repair on the hull to fix a leak. I'm scared of cast cranks,but some people use them without incident. Good luck,I guess.

Re: Stock Elem Crankshafts??
 

if it didn't come with a steel crank you can not use one.. good luck with that

Re: Stock Elem Crankshafts??
 

James, why do you say that? I see no ruling that states that, and there are lots of instances of engines that were not produced with forged or cast cranks running either.

Re: Stock Elem Crankshafts??
 

The flip side of that question would be "why hunt a 30 year old junk yard piece, or more likely 4-5 to get a good one, then spend $500+ on prepping a $20 30 year old junk yard part?" He could simply order a new crankshaft, with the stroke and index already correct, and never have to hunt an old junk yard part or worry about it again.

Re: Stock Elem Crankshafts??
 

I think that about most concisely sums it up.

Re: Stock Elem Crankshafts??
 

Who makes a good Indexed Crank for the LT1 (93-96)?


Dan

Re: Stock Elem Crankshafts??
 

Dan, I spoke with the guys at Callies at length recently at a seminar hosted by my warehouse supplier, and they are quite happy to work with Stock and Super Stock racers. Call them and tell them what you need/want.

Re: Stock Elem Crankshafts??
 

Thanks..
Will do

D

Re: Stock Elem Crankshafts??
 

well said, also with that being said I am hearing several guys running this set up that I am building even using cast iron intake manifold when the engine original came with aluminum. I had a reputable carb guy tell me he has found early model rochester carbs that are accepted for the 85 305. it seems to me that there are a few pieces they are accepting that were not absolutely stock.

Re: Stock Elem Crankshafts??
 

Regarding the 427 BBC Boat motor that blew up, this being more a question, isn't the load on a boat prop more than anything we run through car drivetrain?

Will Lamprecht I/S 396/325 in progress

Re: Stock Elem Crankshafts??
 

Another thing with BBC, 396-427 OEM are internally balanced while OEM 454 are externally balanced. You put the wrong flywheel on won't take long to break crank. That I have seen. My 396 right now is Externally balanced because it really is a race motor, not OEM. I would assume inbalanced stuff would break.

Will L

Re: Stock Elem Crankshafts??
 

I would not want to run a race engine externally balanced unless it was absolutely necessary and unavoidable. When you do that, you're using one or both ends of the crank to input the counter balance through. That's an extra load on the ends of the crank.

Re: Stock Elem Crankshafts??
 

The boat engine that blew up was a 71-72 402 short block with a cast crank.He put that in the boat while his good 427 was down for a rebuild. Boat engines, especially in the Colorado River water ski crowd, tend to come out of the water, free wheel,land hard,load the prop hard, climb back out, ad nauseum. There are continuous shock loads thrown at the rear of the crank interspersed with as many total unloadings of the prop. This continuous twisting and untwisting of the crank is what blew it up. It probably was cracked to begin with.
I think the original question in the first part of this thread was wondering if a steel 350 crank would be OK in a 305. We're assuming OEM parts here,yes it would work.Any balance differences between 350 pistons and 305 pistons would be easily taken up in a normal balance job.

Re: Stock Elem Crankshafts??
 

The boat prop load isn't a constant load.The car is. Heavy cars provide a more constant load.A light car has just as much load, the light car goes faster because its lighter.

Re: Stock Elem Crankshafts??
 

Sorry Greg, did not mean to hijack the thread. I'm not too sure but sometimes I think there is a misconception about a Stock Eliminator motor. Years ago when i posted a You tube video of my old 68 Impala there was comments on how expensive it really is to build a motor. People said "you have to find 20 sets of heads flow them all for the best, find a load of intake manifolds flow those for the best ones ect" I did not do that. I did use what we thought were the best casting # allowed (290), and found a intake at a swap meet. I did try a few different valves though on a flow bench but that was it. Thats all. Maybe some folks do that, I really don't know, out of my budget!

Will

Re: Stock Elem Crankshafts??
 

No problem,lol just trying to find the best for my motor.. and more import what is legal. I hate to do all this and have a motor that gets me busted by the tech guys.

Re: Stock Elem Crankshafts??
 

I installed a beautiful Callies crank this summer. It offers peace of mind but zero ET.