Stock Elem Crankshafts??

Greg Reimer 7376 · 09-15-2015, 08:41 PM

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!

REGGIE WINKLES · 09-16-2015, 11:02 AM

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.

GregP · 09-16-2015, 11:09 AM

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

Alan Roehrich · 09-16-2015, 11:11 AM

Quote:

Originally Posted by GregP

Thanks for the replies, but can anyone recomend a good aftermarket crank that is legal?

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

GregP · 09-16-2015, 11:18 AM

Quote:

Originally Posted by Alan Roehrich

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

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.

Rat Raceway · 09-16-2015, 11:48 AM

Quote:

Originally Posted by GregP

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.

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

GregP · 09-16-2015, 12:08 PM

Quote:

Originally Posted by Rat Raceway

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

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

impstocker · 09-19-2015, 07:07 PM

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

Greg Reimer 7376 · 09-19-2015, 08:28 PM

Quote:

Originally Posted by impstocker

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

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.

impstocker · 09-19-2015, 11:34 PM

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

09-15-2015, 08:41 PM	#1
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,137 Likes: 172 Liked 719 Times in 220 Posts	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!

09-16-2015, 11:02 AM	#2
REGGIE WINKLES Member Join Date: Jun 2007 Location: St. Augustine, Fla. Posts: 229 Likes: 569 Liked 39 Times in 9 Posts	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. __________________ Reggie Winkles 2650/Stock

09-16-2015, 11:09 AM	#3
GregP Junior Member Join Date: Aug 2015 Location: Hattiesburg, Ms Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	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. Last edited by GregP; 09-16-2015 at 11:12 AM.

09-19-2015, 07:07 PM	#8
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	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

09-19-2015, 11:34 PM	#10
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	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