3.0 Power Adder Options

[Bdc101]

What do you mean you are "limited to keep things from getting hot due to RPM?" Are you purposefully slowing down your driving because you think it's too hot, or are you getting warnings on the dash?

Adding more horsepower to the equation (boost or otherwise) would just make an overheating problem worse. Unless your heat problem is just in your head, you probably need to address that first before adding more power (and heat), right?

[7to3_enthusiast]

Originally Posted by Bdc101

What do you mean you are "limited to keep things from getting hot due to RPM?" Are you purposefully slowing down your driving because you think it's too hot, or are you getting warnings on the dash?

Adding more horsepower to the equation (boost or otherwise) would just make an overheating problem worse. Unless your heat problem is just in your head, you probably need to address that first before adding more power (and heat), right?

My X5 trans overheats when trying to stay at highway speeds while towing the GTR. Mainly because to keep up with the flow of traffic I have to give it enough throttle that it downshifts to 4th and my RPMs typically are around 4500+. Increase in RPM creates friction and thus heat at an exponential scale. Hence why diesels are typically so well mannered for towing.

[Bdc101]

Originally Posted by 7to3_enthusiast

My X5 trans overheats when trying to stay at highway speeds while towing the GTR. Mainly because to keep up with the flow of traffic I have to give it enough throttle that it downshifts to 4th and my RPMs typically are around 4500+.

You are most definitely not going to solve your transmission overheating problem by adding boost so you can have more HP at lower RPM. If you tow a 3800lb car with a 1,500+lb trailer you are right at the limit of the 3.0 auto's towing capacity (5,500lbs). It's far more likely that your transmission is in need of maintenance or at best an external cooler. Then you could just use the throttle normally in your current motor instead of adding horsepower so you can overheat your transmission even more by transmitting more horsepower (and thus more heat) through it.

[nick325xit 5spd]

Originally Posted by 7to3_enthusiast

My X5 trans overheats when trying to stay at highway speeds while towing the GTR. Mainly because to keep up with the flow of traffic I have to give it enough throttle that it downshifts to 4th and my RPMs typically are around 4500+. Increase in RPM creates friction and thus heat at an exponential scale. Hence why diesels are typically so well mannered for towing.

Why don't you add a transmission cooler? You will need that no matter what, and that's a lot cheaper and more reliable than trying to brew up an FI solution.

As for diesels, well, the thing about them is that they HAVE to be force fed to make enough power to perform well. And they are built from the factory to withstand all that. Also, my diesel truck has a transmission cooler and a trans temp gauge from the factory because, well, they still overheat.