Max Power/Torque on stock PTU?

[MrCockroach]

I've been searching google and can't find the answer. What would be the absolute maximum amount of power you can send through the stock PTU? What would be considered a safe amount for a modified ecoboost motor?

[glock-coma]

I've heard 600 hp at the wheels is the max before issues start to rise.

[AJP turbo]

I would say a safe amount would be about 300 or so at the wheels or about 365hp/350ftlbs of torque at the flywheel...I wouldn't really push it any harder than that

[glock-coma]

I would say a safe amount would be about 300 or so at the wheels or about 365hp/350ftlbs of torque at the flywheel...I wouldn't really push it any harder than that

I don't think the new guy will get your sense of humor. lol

[peppelepugh]

I would say a safe amount would be about 300 or so at the wheels or about 365hp/350ftlbs of torque at the flywheel...I wouldn't really push it any harder than that

I don't think the new guy will get your sense of humor. lol

LOL i see what ya did there!!!! ***slaps knee***

[SHOdded]

Most tuners like to keep it at about 400 awhp before they are reluctant to push any further, so I would say that is a practical limit.  Now absolute limit is likely to be around 550 awhp, if the rumors of Ford's 700 crank hp (subtract 20-23% for drivetrain loss for awhp) are to be believed.

[AJP turbo]

I would say a safe amount would be about 300 or so at the wheels or about 365hp/350ftlbs of torque at the flywheel...I wouldn't really push it any harder than that

I don't think the new guy will get your sense of humor. lol

I mean it's kind of a joke but at the same time not really....I used to get into the magic number idea years ago til I realized how silly that concept was..

Is it bad that I make myself laugh with my own comments sometimes.

[Jtrain]

Conversations like this always make me laugh.

Let's say at 365TQ, your tranny will last... 250k
When you got to 450TQ, Your tranny will last less, Let's say 100k
When you push it to 600+ Your tranny will probably last a couple of pulls.

It's all about torque, and it's mostly about heat. The more friction and heat soaking your clutch packs take, the less time your transmission will last.

I've toasted PLENTY of AT's to know about this. There is no Safe horsepower (Torque) because these aren't perfect machines that operate without friction. The more friction and heat the less time it will last.


Are there people who get crazy numbers and get some good millage out of it. Probably, it's the internet. If you have thousands of dollars to burn you can push it hard and find out if you're one of them!

[FoMoCoSHO]

The jtekt coupling is basically bullet proof, it is rated for cars from that make 150-1500 HP.

I'm trying to find the documentation i came across, I'm not sure which gadget i saved it on.

[BiGMaC]

Good info!

Still.... The more we ask of components the shorter the life. We're all wanting that optimal point.

[FoMoCoSHO]

http://www.fordfusionforum.com/topic/5190-jtekt-awd-itcc-system-electronic-control-unit-supplier/

It was in a Wards article that is now "premium content"...

A snippet from that article can be found in the above link.