Built 2v, Cobra crank vs GT crank

[Tally_4.6]

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]

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?

 

[Tally_4.6]

-18cc

Gasket matched ported PI heads with cams.

 

[D3VST8R96GT]

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.

 

[Tally_4.6]

'03 block, so no work necessary.

 

[duff daddy]

I have an 8 bolt f150 crank in my na 2v spinning to 8500 + ...it's cast

 

[96blak54]

Its not forced induced either. I get where you're going though

 

[DropTopPony]

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?

 

[Tally_4.6]

Well shit.