Stock Elem Crankshafts?? - Page 3

Dan Fahey · 09-18-2015, 05:51 PM

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

Dan

Alan Roehrich · 09-18-2015, 06:28 PM

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.

Dan Fahey · 09-19-2015, 12:13 AM

Quote:

Originally Posted by Alan Roehrich

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.

Thanks..
Will do

D

GregP · 09-19-2015, 08:49 AM

Quote:

Originally Posted by Dwight Southerland

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.

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.

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

impstocker · 09-19-2015, 07:14 PM

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

Alan Roehrich · 09-19-2015, 07:46 PM

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.

Greg Reimer 7376 · 09-19-2015, 08:25 PM

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.

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

09-18-2015, 05:51 PM	#21
Dan Fahey VIP Member Join Date: Oct 2008 Posts: 2,114 Likes: 1,078 Liked 180 Times in 110 Posts	Re: Stock Elem Crankshafts?? Who makes a good Indexed Crank for the LT1 (93-96)? Dan

09-18-2015, 06:28 PM	#22
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,913 Likes: 995 Liked 1,038 Times in 272 Posts	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. __________________ Alan Roehrich 212A G/S

09-19-2015, 07:07 PM	#25
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 54 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, 07:14 PM	#26
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 54 Times in 16 Posts	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

09-19-2015, 07:46 PM	#27
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,913 Likes: 995 Liked 1,038 Times in 272 Posts	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. __________________ Alan Roehrich 212A G/S

09-19-2015, 08:25 PM	#28
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,111 Likes: 164 Liked 649 Times in 208 Posts	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.

09-19-2015, 11:34 PM	#30
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 54 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