97 crankshaft

[Martinm_sn95]

So I’m building a 97 GT. Just finished doing my t56 swap, now I just thinking about getting a cobra crankshaft for the extra rpms and the stronger material but I totally forgot they are 8 bolt and of course the flywheel I used for the t56 swap is 6 bolts and I’m not trying to buy a new flywheels any options? I heard about a 6 bolt forged crankshaft? Trying to make 600whp

 

[jaxbusa]

I wouldn’t let the cost of an 8 bolt flywheel and new clutch deter you from going with a forged crank. Keep driving it how it is and keep accumulating parts. And I’m jealous about the transmission swap. I’m assuming it’s from a cobra. If so, and you’re wanting to get 600 hp, you will want to replace the input shaft to 26 spline.


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[Martinm_sn95]

It is 26 spline, and thanks appreciate it. Just trying to get all the parts before building the new engine, but I don’t seem to find any stronger replacement for the crank shaft besides the 8 bolt one

 

[jaxbusa]

I believe that a forged crank only comes in 8 bolt. Want to share your parts list for the rest of the build?


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[97gtconv.]

Lincoln Mark VIII 4.6 4v, Mercury Maruader 4.6 4v, 03-04 automatic tranny Mach 1 4V had 8 bolt cast cranks. wouldn't doubt there's others

 

[me32]

So I’m building a 97 GT. Just finished doing my t56 swap, now I just thinking about getting a cobra crankshaft for the extra rpms and the stronger material but I totally forgot they are 8 bolt and of course the flywheel I used for the t56 swap is 6 bolts and I’m not trying to buy a new flywheels any options? I heard about a 6 bolt forged crankshaft? Trying to make 600whp

You plan to build the whole motor right?

 

[Martinm_sn95]

You plan to build the whole motor right?

Yea forged internals

 

[me32]

Yea forged internals

So at that point just spend the money to get the new flywheel. For the time being ride with what you caught. When its time sell the current flywheel. Get some of the money back

 

[Martinm_sn95]

Yea that’s what I was thinking about I didn’t want to risk me build just for that extra money

 

[ZEN357]

I would spend the money for a new flywheel. Look at Jegs or Summit Racing.

 

[Martinm_sn95]

That’s probably what I’m gonna do I was just wondering if there is a forged 6 bolt crank

 

[jaxbusa]

Lincoln Mark VIII 4.6 4v, Mercury Maruader 4.6 4v, 03-04 automatic tranny Mach 1 4V had 8 bolt cast cranks. wouldn't doubt there's others

He’s asking if there is a forged crank that comes in a 6 bolt configuration. I believe all forged are 8 bolt, not that all 8 bolt are forged.


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[97gtconv.]

He’s asking if there is a forged crank that comes in a 6 bolt configuration. I believe all forged are 8 bolt, not that all 8 bolt are forged.

i've never seen a 6bolt forged one. there's plenty of 8bolt ones not forged. why i commented the way i did.

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[Martinm_sn95]

Yea I think I’m just gonna replace my flywheel when it time to put the 8 bolt crankshaft on

 

[Three21]

I've read a lot of people saying that the cast crank is good to 600hp. You could have it magnaflux'd and checked out by a machine shop to make sure it's in good shape then balanced with your forged rods and pistons.

But if you're after the higher rpm and safety factor then you'll have to go down the 8-bolt road.