hurricane or 5.7/6.4 hemi

[Ramintime]

The Hurricane has been for sale since ... 2022 ? ... and I'm not seeing a slew of posts about walnut blasting so I'm hoping they've sorted it out.

My 2010 BMW was notorious for gunking up the intake valves, but they also had an overly complicated pcv system in the valve cover gasket and ports in the intake which sucked crankcase vapor back over the valves; 25-30k between cleanings wasn't unusual.
Since then, my 2014 Corvette (90k), 2015 Audi (110k), and more recently 2024 Hyundai (30k), were also DI-only and had no issues with intake valve buildup. I'm hoping by now the manufacturers have this problem licked.

Its mainly an issue with turbo engines specifically because of the heat generation. Thats why Ford started using port injection, thats the only way to combat the problem that I've seen (aside from the blasting). Would love to see a tear down of a Hurricane with say...100k miles one of these days. I still would take a chance and grab the Hurricane though as long as it's new or at least super low miles.

 

[BowDown]

Its mainly an issue with turbo engines specifically because of the heat generation. Thats why Ford started using port injection, thats the only way to combat the problem that I've seen (aside from the blasting). Would love to see a tear down of a Hurricane with say...100k miles one of these days. I still would take a chance and grab the Hurricane though as long as it's new or at least super low miles.

Carbon build up on the back sides of intakes valves and intake ports has previously occurred in all DI engines regardless of aspiration, turbos have nothing to do with it.

 

[Ramintime]

Carbon build up on the back sides of intakes valves and intake ports has previously occurred in all DI engines regardless of aspiration, turbos have nothing to do with it.

You're kidding, right? Every engineer and mechanic on this planet has verified that the high heat from turbos cause an engine to be more susceptible to carbon build up.

 

[NorskieRider]

I always thought it was increased localized heat and increased blowby from forced induction. Turbos contribute to it, but don't cause it, and there are non-turbo DI engines which suffered from it.

 

[BowDown]

You're kidding, right? Every engineer and mechanic on this planet has verified that the high heat from turbos cause an engine to be more susceptible to carbon build up.

The air coming into the intake port from a properly setup turbo or supercharger is no more than 150 to 170° on its worse day. The face of the intake valve sees combustion temp's between 1,500°F and 3,000°F (815°C and 1,650°C).

The heat in the valve that causes the carbon build up comes from the combustion process otherwise NA engines wouldn't be affected by DI carbon build up.

Direct Injection Engines: Why Carbon Buildup Happens (And How To Prevent It) - Jalopnik

Fuel injection offers drivers increased efficiency and power. But there's a common problem, too: carbon buildup on the engine's intake valves.

www.jalopnik.com

 

[CalvinC]

Ford added port injection to the gen2 ecoboost for efficiency, not for valve coking prevention.

The DI-only Gen1 ecoboosts never actually ended up having a coke problem in the long run at all. But when gen2 ecos introduced dual injection people just assumed it would also help with coking. We didn’t know then that it was an overblown issue (myself included).

I’m sure the Hurricane is even better in that regard. It was introduced 11 years after the first ecoboost.

 

[Ramintime]

Ford added port injection to the gen2 ecoboost for efficiency, not for valve coking prevention.

The DI-only Gen1 ecoboosts never actually ended up having a coke problem in the long run at all. But when gen2 ecos introduced dual injection people just assumed it would also help with coking. We didn’t know then that it was an overblown issue (myself included).

I’m sure the Hurricane is even better in that regard. It was introduced 11 years after the first ecoboost.

Its true that they also added for port for efficiency but Ford engineers themselves stated that it is also to combat carbon build-up on the intake valves. I can try to find the article from a few years ago, but it doesnt get any clearer than that.

 

[Jako]

Its true that they also added for port for efficiency but Ford engineers themselves stated that it is also to combat carbon build-up on the intake valves. I can try to find the article from a few years ago, but it doesnt get any clearer than that.

It might be in the "The Car Guy" video

 

[Ramintime]

It might be in the "The Car Guy" video

It might be in a video too, but I was looking for a written article that I saw. Can't seem to find the same one that I read though.