VooDoo Engine - Flat Plane Crankshaft
- Thread starter Cobrar
- Start date
Nice article. Raj is the man.
And without an exhaust set up designed with emissions in mind, this engine will sound absolutely ridiculous.
And without an exhaust set up designed with emissions in mind, this engine will sound absolutely ridiculous.
Even having a background in emissions/catalyst technology and a requisite appreciation of the improvement in catalyst light-off performance, I can confidently state that:
--- No one, I mean absolutely no one, will modify the stock exhaust system --- :rofl
--- No one, I mean absolutely no one, will modify the stock exhaust system --- :rofl
Indy GT
Yea, I got one...too
Thanks Rex, very interesting as some of the technical intricacies start to trickle out-
Previous FPC engine size limits were between 4.5 – 4.6L displacement because of increased second order vibrations. Yep.
The 5.2L Voodoo powerplant was DESIGNED as a normally aspirated engine. Thus it is not an “EcoBoost” type engine and with an existing 12:1 static compression ratio is not really amenable to super/turbocharging. (This topic is just like what oil is the best to use in your car. Everyone will have an opinion) It is also a port injected engine not direct fuel injection.
The FPC engine was a bit low on the torque curve for the target application which is why the displacement was increased to 5.2L.
FPC NVH abatement may include the vehicle design as well. This is likely why this engine is not a “plug-n-play” crate engine candidate. Many seem to completely discount this design feature whereby the engine AND vehicle are designed as a system to address the idiosyncrasies of a FPC engine.
Engine fuel cut off is 8,000 rpm with a “safe headroom” (?) of 250 rpm. Electronics and low inertia crankshaft dynamics better be pretty good to hold speed overage to 250 rpm.
I imagine we will continue to learn more in the upcoming months. Thanks for the post!
Previous FPC engine size limits were between 4.5 – 4.6L displacement because of increased second order vibrations. Yep.
The 5.2L Voodoo powerplant was DESIGNED as a normally aspirated engine. Thus it is not an “EcoBoost” type engine and with an existing 12:1 static compression ratio is not really amenable to super/turbocharging. (This topic is just like what oil is the best to use in your car. Everyone will have an opinion) It is also a port injected engine not direct fuel injection.
The FPC engine was a bit low on the torque curve for the target application which is why the displacement was increased to 5.2L.
FPC NVH abatement may include the vehicle design as well. This is likely why this engine is not a “plug-n-play” crate engine candidate. Many seem to completely discount this design feature whereby the engine AND vehicle are designed as a system to address the idiosyncrasies of a FPC engine.
Engine fuel cut off is 8,000 rpm with a “safe headroom” (?) of 250 rpm. Electronics and low inertia crankshaft dynamics better be pretty good to hold speed overage to 250 rpm.
I imagine we will continue to learn more in the upcoming months. Thanks for the post!
We are on the same page -- 250 rpm 'headroom' on a relatively free revving engine?? I'll bet Ford employed electronic limiters, eg. an on/off magnetic brake on the crankshaft damper, agressive cam timing retard, and fuel cut off to get the window that small. I see these being 'unplugged' along with exhaust replacements. ;-))