CLASS RACER FORUM
Page 2 of 4 1 2 34
Show 40 post(s) from this thread on one page

CLASS RACER FORUM (https://classracer.com/classforum/index.php)
-   Stock and Super Stock Tech (https://classracer.com/classforum/forumdisplay.php?f=4)
-   -   Stock Elem Crankshafts?? (https://classracer.com/classforum/showthread.php?t=59542)

impstocker 09-16-2015 04:50 PM
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

nolongerracing 09-16-2015 08:59 PM
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.

GregP 09-17-2015 09:58 AM
Re: Stock Elem Crankshafts??
 
Quote:
Originally Posted by impstocker (Post 482630)
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
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.

GregP 09-17-2015 10:01 AM
Re: Stock Elem Crankshafts??
 
Quote:
Originally Posted by nolongerracing (Post 482648)
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.
What about forged, they are plenty of cast out there..

nolongerracing 09-17-2015 09:17 PM
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.

Greg Reimer 7376 09-17-2015 11:09 PM
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.

James Perrone 09-18-2015 08:57 AM
Re: Stock Elem Crankshafts??
 
if it didn't come with a steel crank you can not use one.. good luck with that

Dwight Southerland 09-18-2015 09:05 AM
Re: Stock Elem Crankshafts??
 
Quote:
Originally Posted by James Perrone (Post 482735)
if it didn't come with a steel crank you can not use one.. good luck with that
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.

Alan Roehrich 09-18-2015 01:44 PM
Re: Stock Elem Crankshafts??
 
Quote:
Originally Posted by nolongerracing (Post 482717)
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.
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.

Greg Reimer 7376 09-18-2015 02:12 PM
Re: Stock Elem Crankshafts??
 
Quote:
Originally Posted by Alan Roehrich (Post 482759)
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.
I think that about most concisely sums it up.


All times are GMT -4. The time now is 07:03 AM.
Page 2 of 4 1 2 34
Show 40 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.