DH increase HP thread

[Jays Stang]

I plan on adding either a supercharger or twin turbos. I wanted to ask the knowledgeable some of the pros and cons?
Im mainly focused on how much HP addition the DH engine can handle before I significantly lower the life expectancy of the engine and secondarily whether the stock DH needs to be altered or are the upgraded engines parts in the DH good enough to add additional HP.

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[Dena]

Watch this site because a supercharger should be on the way. There are no numbers but from the results with the GT, we might see near 1000 horse power out of the DH. The engine shouldn't need any modification other than on the top for the superchargers and probably fuel supply.
Any boost like that will reduce the life of the engine just as an unmodified engine will last longer if you don't push it hard. I plan on keeping mine stock as there is sufficient power for my wants and needs. The real question is if you have that much power, how much will you use it? Remember race engines tend to be used for a single race, maybe under 1,000 miles and then they are tore down and inspected before they are reused. Our engines will last longer but it depends on the user.

 

[Jays Stang]

Watch this site because a supercharger should be on the way. There are no numbers but from the results with the GT, we might see near 1000 horse power out of the DH. The engine shouldn't need any modification other than on the top for the superchargers and probably fuel supply.
Any boost like that will reduce the life of the engine just as an unmodified engine will last longer if you don't push it hard. I plan on keeping mine stock as there is sufficient power for my wants and needs. The real question is if you have that much power, how much will you use it? Remember race engines tend to be used for a single race, maybe under 1,000 miles and then they are tore down and inspected before they are reused. Our engines will last longer but it depends on the user.

Thanks for the reply. I was thinking that since the DH has some upgraded engine parts that the engineers had additional future HP upgrades in mind. I want it all. Increased HP and reasonably long engine life.

 

[Paul's stable]

Thanks for the reply. I was thinking that since the DH has some upgraded engine parts that the engineers had additional future HP upgrades in mind. I want it all. Increased HP and reasonably long engine life.

I Whippled my DH I love it and would defiantly do it again. As for longevity it says change the supercharger oil every 100,000 miles so I'll let you know when I get there.

 

[LvnInHB]

I have a 24 DH premium and two months after buying it got the Whipple /Lethal Performance Stage 2 supercharger installed. Although I have not had it on a dyno it's said it puts out 875hp at the crank. I've hear of some people posting they get 800 RWHP from the same setup. I don't know. But whatever it is it's enough for me. It smokes the tires from 1st to 4th if you get on it hard. Only other mod was an X-pipe and a few carbon add-ons like the track pack wing and a carbon /LED stearing wheel and a few others. The only issue I have had unfortunately is I'm now getting a po430 code. Which means the catalyst below threshold efficiency bank 2. Meaning the catalytic converter is bad likely due to overheating because it's supercharger. Which sucks. I'm taking it to the dealership Saturday and will see if they can warranty it but not getting my hopes up as they didn't install it. If all else fails I will be ordering the Kooks long tube headers with the green cats. Living in Socal though means I have to send them to an out of California address which isn't a problem as I have friends in Arizona and my son in Texas and will drive there to pick it up. This is my first ever mustang and first ever supercharged car. And if you as me had I known a supercharger would cause the catalytic converters to go bad would I still have supercharged it. I'd have to say hell ya I would. The Dark Horse is insanely better with a Whipple supercharger. .

 

[Q6543]

Get them cats outta there, not worth the risk

 

[LvnInHB]

Get them cats outta there, not worth the risk

What do you mean by "risk"? Forgive my ignorance I've never had a supercharged car before and wasn't aware that they would damage the cats. So what risks?Thanks

 

[robvas]

What do you mean by "risk"? Forgive my ignorance I've never had a supercharged car before and wasn't aware that they would damage the cats. So what risks?Thanks

The increased heat in the exhaust from the supercharger can destroy the cats, if they get clogged up you can build up a ton of pressure and damage your pistons. So you are essentially risking your entire engine by running the factory cats or low-quality aftermarket cats.

https://www.f150forum.com/f123/failed-piston-rings-whipple-490437/

 

[Q6543]

They melt and clog, pressure increases in the engine and if it pushed through the ring can but together and boom, pop a ringland

I’d rather have no cats and no warranty than run cats and risk needing a new bottom end with a warranty

 

[LvnInHB]

The increased heat in the exhaust from the supercharger can destroy the cats, if they get clogged up you can build up a ton of pressure and damage your pistons. So you are essentially risking your entire engine by running the factory cats or low-quality aftermarket cats.

https://www.f150forum.com/f123/failed-piston-rings-whipple-490437/

Wow! Thanks for the info. Glad it’s going to the dealership tomorrow, even though I’m almost certain they will not warranty it at least if they don’t I will take it back home and cut the cats out and weld in a pipe in between until I get the long tube headers ,it will be loud I’m sure but oh well. Better running and loud than broken down . Thanks again for your advice and info. Much appreciated.

 

[LvnInHB]

They melt and clog, pressure increases in the engine and if it pushed through the ring can but together and boom, pop a ringland

I’d rather have no cats and no warranty than run cats and risk needing a new bottom end with a warranty

Thank you as well,for letting me know. Appreciate it.

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