Two step and a stock crank?

racer913 · 09-27-2007, 09:50 PM

Will a stock crank hold up to a 2 step is a 2 step hard on a crank?

Mike Pearson · 09-28-2007, 03:52 PM

If you are running a small block chevy you should not have a problem with a stock crank. I have used stock cast and steel cranks in my super stocker with no failures. That would be a 350 cu in. What type of engine are you using?

Mike

Dave Goob Cook · 09-29-2007, 09:43 AM

Opinions vary on the damage of a 2-step, I like to keep my 2-step time to a minimum, would never consider using a 3-step for the burnout.
The higher the 2-step setting, the better off you are also, I feel pretty comfortable with it down to about 3200 RPM's.
I've been running race prepped cast cranks for years, at high compression ratios, they seem to hold up just as well as production steel cranks......or better.

SPT3780 · 10-02-2007, 05:38 PM

Right now I'm up to 33 runs on a 30 year old factory 360 Dodge shortblock footbraking on the 2-step @ 2500-2900 rpm's. It was from the junkyard with unknown miles, just took it apart and put new rings and bearings in it.

I'm hoping it at least lasts for the rest of this month, then my racing is done. I'll let you know if anything happens. My other motor made it well over 100 passes with factory cast crank before I spun a bearing, and it had high compresion. The bearing didn't spin because of the 2-step.

Adger Smith · 10-02-2007, 07:30 PM

Dave,
Please explain why you would not use a 3 step in the burnout, yet get on the 2 step for the leave?

Dave Goob Cook · 10-03-2007, 09:04 AM

Quote:

Originally Posted by Adger Smith

Dave,
Please explain why you would not use a 3 step in the burnout, yet get on the 2 step for the leave?

I'm on the 2-step for less than 1.5 seconds on the launch, don't like washing the cylinders with a 3-step in the burnout, plus, my car won't hook dead on the converter, or I'd not be using the 2-step.

09-27-2007, 09:50 PM	#1
racer913 Junior Member Join Date: Aug 2007 Posts: 69 Likes: 2 Liked 0 Times in 0 Posts	Two step and a stock crank? Will a stock crank hold up to a 2 step is a 2 step hard on a crank?

09-28-2007, 03:52 PM	#2
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,454 Likes: 616 Liked 1,943 Times in 584 Posts	Re: Two step and a stock crank? If you are running a small block chevy you should not have a problem with a stock crank. I have used stock cast and steel cranks in my super stocker with no failures. That would be a 350 cu in. What type of engine are you using? Mike __________________ Mike Pearson 2485 SS

09-29-2007, 09:43 AM	#3
Dave Goob Cook Member Join Date: Dec 2006 Location: Indy Posts: 422 Likes: 0 Liked 0 Times in 0 Posts	Re: Two step and a stock crank? Opinions vary on the damage of a 2-step, I like to keep my 2-step time to a minimum, would never consider using a 3-step for the burnout. The higher the 2-step setting, the better off you are also, I feel pretty comfortable with it down to about 3200 RPM's. I've been running race prepped cast cranks for years, at high compression ratios, they seem to hold up just as well as production steel cranks......or better.

10-02-2007, 05:38 PM	#4
SPT3780 Junior Member Join Date: Sep 2007 Posts: 2 Likes: 0 Liked 0 Times in 0 Posts	Re: Two step and a stock crank? Right now I'm up to 33 runs on a 30 year old factory 360 Dodge shortblock footbraking on the 2-step @ 2500-2900 rpm's. It was from the junkyard with unknown miles, just took it apart and put new rings and bearings in it. I'm hoping it at least lasts for the rest of this month, then my racing is done. I'll let you know if anything happens. My other motor made it well over 100 passes with factory cast crank before I spun a bearing, and it had high compresion. The bearing didn't spin because of the 2-step.

10-02-2007, 07:30 PM	#5
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Two step and a stock crank? Dave, Please explain why you would not use a 3 step in the burnout, yet get on the 2 step for the leave? __________________ Adger Smith (Former SS)