Built 2v, Cobra crank vs GT crank

Tally_4.6

Well-Known Member
Joined
Feb 1, 2007
Messages
3,862
Reaction score
75
Location
Orlando, Fl
Down to deciding on which crank i want to use. Built N/A 2v at first, with boost later. I want the bottom end to handle around 6-700 without a problem.

I have the '03 GT crank ready to go, with the corresponding block on the stand.

Boss rods with dished forged Manleys are the rest of the rotating assembly.


Pros and cons of both? I've heard the RPMs will kill the GT crank, but it can handle a lot...and it's cast. But the Cobra crank likes to rev and is forged.


Help...lol
 

96blak54

Moderator
Staff
Joined
Feb 21, 2011
Messages
9,981
Reaction score
2,810
Location
In the shop
This all depends on the blocks ability to stay put. A cast block doesnt move like an aluminum block does. The aluminum block expanding/ contracting, twisting alot more than the cast iron. If youre using aluminum block, definitely use the flexible forged crank.

Harmonics do play a roll in longevity and the forged will endure. But then again how many cast cranks have we heard breaking in a cast block?

What dish piston are you going with? Is this for pi heads?
 

D3VST8R96GT

Well-Known Member
Joined
Feb 19, 2009
Messages
4,028
Reaction score
110
Location
Marble Fall, AZ
I second the cast crank. There are so man people who have repeated what they read about the cast crank. I think they are great for what they are.

If its a NPI block you will need some work done to throw the forged crank in there. the centers have counter weights.
 

DropTopPony

Post Whore
SN95 Supporter
Joined
Jan 12, 2006
Messages
15,376
Reaction score
203
Location
South Jersey
Use what you have. I picked up a Cobra crank for almost nothing with my Teksid block so it was a no brainer but I honestly was prepared to go ahead with the cast crank for any build I had in mind. Like said above, how many failures have there really been over the years?
 

Latest posts

Forum statistics

Threads
77,438
Messages
1,502,149
Members
14,919
Latest member
Alida81

Members online

Top