Flat Plane Crank Coyote conversion kit....

[Optimum Performance]

The performance comes from the breathing, it still has a sizable counter weight and again, not worthy of doing unless to market an engineering exercise. Which was extremely successful. Remember this engine was hyped for a few years before release in the media. People wanted it just because. Ask any engine builder in any form of racing, the performance gain is negligible.

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[TexasRebel]

The performance comes from the breathing, it still has a sizable counter weight and again, not worthy of doing unless to market an engineering exercise. Which was extremely successful. Remember this engine was hyped for a few years before release in the media. People wanted it just because. Ask any engine builder in any form of racing, the performance gain is negligible.

The Voodoo has no counterweights on the crankshaft.

 

[M3Convert]

This happens in the Voodoo just the same. Each bank of the Voodoo has, believe it or not, a similar stroke pattern and firing order as the Model T. Afterall, the Voodoo is two I4 engines connected 90 degrees apart.

Nothing is free.

I am trying to think why Ford never used this in their marketing! LOL!

 

[Optimum Performance]

The Voodoo has no counterweights on the crankshaft.

Sorry, I must have been mistaken. :cheers:

Edit: Added picture of 5.2 Cross Plane Crank for visual aid.

 

[TexasRebel]

Oh, they did UDUD? that was stupid. :doh:

That actually makes the Voodoo crankshaft heavier than the Coyote with the oversized end weights and necessary mids.

That was definitely not the setup I saw when the Voodoo first came out. UDDU makes for a much lighter rotating assembly.

even Henry knew it

 

[wireeater]

A little OT but did anyone see Rev Auto FB post yesterday where they are taking the Coyote to 9k+ rpm.

 

[Optimum Performance]

Oh, they did UDUD? that was stupid. :doh:

That actually makes the Voodoo crankshaft heavier than the Coyote with the oversized end weights and necessary mids.

That was definitely not the setup I saw when the Voodoo first came out. UDDU makes for a much lighter rotating assembly.

They had to to control 2 order frequency IIRC. Don't get me wrong, still an engineering masterpiece and it takes real balls for a manufacturer to even go down this road today. But to add it to an existing engine in your garage it offers zero benefit. If it did, all professional teams NHRA, NASCAR, IMSA would run them, they don't.

The Shelby is an iconic vehicle but 93% of the engine performance comes from the top end, 5% from a very light rod and piston assembly and 2% from the crankshaft because they drilled lightening holes in it and have a fairly light clutch and flywheel assembly so it rev's up quickly.

 

[TexasRebel]

http://www.jalopyjournal.com/forum/threads/what-about-flat-180-degree-cranks-in-flatheads.94756/

The garage flat-plane has been done forever. I thought this was an interesting read.

 

[Grimace427]

Oh, they did UDUD? that was stupid. :doh:

That actually makes the Voodoo crankshaft heavier than the Coyote with the oversized end weights and necessary mids.

According to the original GT350 press release the FPC is 5lbs lighter than the Coyote crank.

 

[347CobraII]

That's one pricey kit and then 17 week wait ouch

 

[Voodooo]

The only reason why the 5.2 voodoo revs like it does is because of many things.
1) lighter crank and rotating mass.
2) higher flowing heads and cams

A crossplane 5.0 or 5.2 can easily rev to 8250+ rpm.

 

[olaosunt]

The only reason why the 5.2 voodoo revs like it does is because of many things.
1) lighter crank and rotating mass.
2) higher flowing heads and cams

A crossplane 5.0 or 5.2 can easily rev to 8250+ rpm.

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 ?

 

[Terminator2]

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 ?

Heads and cams would be best revving to over 8000. If I remember correctly you need new cams with the GT350 heads to work correctly on the coyote.

 

[Optimum Performance]

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 ?

Heads and cams would be best revving to over 8000. If I remember correctly you need new cams with the GT350 heads to work correctly on the coyote.

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

 

[olaosunt]

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 .

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