Flat Plane Crank Coyote conversion kit....

[olaosunt]

You can buy a 5.2 CPC and all the other bits to have between 540-580 at the crank.

I have an MMR built sleeved 5.2 CPC block/GT 350 heads/stock cams in my Hellion car.I had to use a 2012 IM manifold as the 15+ manifold won't work with the GT 350 heads .

http://www.mustang6g.com/forums/showthread.php?t=71308

I am considering testing the GT 350 manifold (I may use the one on my GT 350) to see if there any gains.
Hellion just made over 1000 hp on a built GT 350 but did not rev past 7000 rpm which is where the intake may show gains .

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[Voodooo]

Since you can't change the crank will head work alone(or GT 350 head upgrade) get you to 8200 + or is a cam upgrade also needed ?
If cams are needed would you use the GT 350 spec cams on a blower car or blower specific cams ?

If I didn't have a GT350, I would build a 5.0 with GT350 heads and GT350 spec cams. Build up the lower end, rods, Pistons, opg, etc and Put a blower on it. It's already been reported that lethal made 819 rwhp on a GT350 with I believe 11psi and on 93.

But I'm a NA guy and I plan on building a FPC 5.2 with 700 crank hp. I plan on raising the compression, a cobrajet/boss custom fabricated intake to fit under the stock GT350 hood, larger throttle body, Hopefully more cams or custom cams at that time.
If I had a GT, I'd buy the 5.2 aluminator crate engine. Drop a shit load of weight from the car and drag race it.

 

[Terminator2]

I have an MMR built sleeved 5.2 CPC block/GT 350 heads/stock cams in my Hellion car.I had to use a 2012 IM manifold as the 15+ manifold won't work with the GT 350 heads .

http://www.mustang6g.com/forums/showthread.php?t=71308

I am considering testing the GT 350 manifold (I may use the one on my GT 350) to see if there any gains.
Hellion just made over 1000 hp on a built GT 350 but did not rev past 7000 rpm which is where the intake may show gains .

GT350 will definitely show gains Boss 302 manifold will do well as well.

 

[olaosunt]

They are also building me another one (sleeved 5.2 CPC)for my KB car that now has a non sleeved built 5.0/GT350 heads /stock cams .

I upgraded the springs in the Hellion car but used the stock springs in the KB car(I may be having back pressure issues now ) .
When I swap in the 5.2 block I will be upgrading the springs but debating on keeping the stock cams vs GT 350 spec cams/or blower
Specific cams .

 

[Voodooo]

No,you don't have to use the GT 350 spec cams with the GT 350 heads.

You can use stock GT cams(what I have in my hellion/KB cars with GT 350 heads) or aftermarket cams as long as you use the modified rocker arms (sold by MMR).
If you choose the GT 350 spec cams then you have to use the OEM GT 350 rocker arms .

Correct.

 

[Voodooo]

The problem with the GT350 heads on a 5.0 bore is, the valves are shrouded. And in my opinion a 5.0 set of cams would be pointless on GT350 heads. The GT350 cams have 14mm /.551 lift.

 

[olaosunt]

So you think there are gains to be had with the GT 350 spec cams vs stock cams on a blower car ?
Or would blower specific cams be better since those cams are optimized for a NA engine ?

 

[olaosunt]

The problem with the GT350 heads on a 5.0 bore is, the valves are shrouded. And in my opinion a 5.0 set of cams would be pointless on GT350 heads. The GT350 cams have 14mm /.551 lift.

Damn you man! You are about to cost me more money !:headbonk:
Although my Hellion car made north of 1000 rwhp with only 17 psi boost with the stock cams.

The valve shrouding is one of the reasons(other than wanting another "5.2") why I am building another 5.2 CPC for my KB car .
If there are going to be gains with upgraded cams might as well do it then-since no additional labor .

 

[Voodooo]

I got word of an 5.4 voodoo block with custom heads that revs to 9500 rpm.

 

[zackmd1]

So I just had an intersting thought. Have not done much reasearch on it yet though....

Since the 5.0 and 5.2 have alot in common in terms of the block, I wonder if you could swap the 5.2 FPC into a coyote block. I wonder if you could get away with the harmonic balancer, FPC, and flywheel in a 5.0 block with 5.0 displacement. The .2L less displacement should help out with harmonics but the 5.2 harmonic balancer and flywheel would likely need tweaking to match the new displacement. Other then that you should just need the 350 cams or are the heads different to a point where 350 cams will not fit in standard 5.0 heads?

 

[zackmd1]

For reference: http://www.fordparts.com/Commerce/P...search=true&year=2017&make=Ford&model=Mustang

 

[theman]

So I just had an intersting thought. Have not done much reasearch on it yet though....

Since the 5.0 and 5.2 have alot in common in terms of the block, I wonder if you could swap the 5.2 FPC into a coyote block. I wonder if you could get away with the harmonic balancer, FPC, and flywheel in a 5.0 block with 5.0 displacement. The .2L less displacement should help out with harmonics but the 5.2 harmonic balancer and flywheel would likely need tweaking to match the new displacement. Other then that you should just need the 350 cams or are the heads different to a point where 350 cams will not fit in standard 5.0 heads?

Until you take displacement down another .5 liter to a 4.5l or less you won't get rid of enough vibrating mass to not need a significant damper.

 

[16MustangVet]

Until you take displacement down another .5 liter to a 4.5l or less you won't get rid of enough vibrating mass to not need a significant damper.

huh? there are 5.0 and 5.2s that are spinning well past 8000 rpm.

Ive seen 5.0s spin 9k.

 

[zackmd1]

Until you take displacement down another .5 liter to a 4.5l or less you won't get rid of enough vibrating mass to not need a significant damper.

Not necessarily... My idea revolves around using factory 5.2 components. Having the harmonic balancer is key. With the factory 5.2 harmonic balancer you would need to ensure the reciprocating mass of the 5.0 (rods and pistons) at least roughly matched the weight of the stock 5.2 rods and pistons in order to ensure proper operation. That or go with lightweight aftermarket rods and pistons and balance the rotating assembly with a custom harmonic balancer. What I don't know is exactly how the displacement difference (in terms of combustion) would play into my idea and even if the 5.0 block would be able to handle the FPC since the 5.2 block was strengthened.

 

[tsloms]

Not necessarily... My idea revolves around using factory 5.2 components. Having the harmonic balancer is key. With the factory 5.2 harmonic balancer you would need to ensure the reciprocating mass of the 5.0 (rods and pistons) at least roughly matched the weight of the stock 5.2 rods and pistons in order to ensure proper operation. That or go with lightweight aftermarket rods and pistons and balance the rotating assembly with a custom harmonic balancer. What I don't know is exactly how the displacement difference (in terms of combustion) would play into my idea and even if the 5.0 block would be able to handle the FPC since the 5.2 block was strengthened.

Actually these engines are internally balanced so the balancer and flywheel balance don't matter. Of course the crank would need to be rebalanced with different weight rods and pistons.

Just stick with a good quality damper and balance accordingly.

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