The 4 cylinder turbo's make way more torque at low RPM than any naturally aspirated anything. 2.4 liter iforce in the new Tacoma produces 317 ft lbs of torque at 1700 RPM. Yes that is correct - look it up. I think 3.6 Pentastar peak is under 300 and peaks at 5000 RPM.
I believe the 3.0L hurricane is a closed deck design, so I imagine this 2.0L will be too. It based on the rumors it looks like it’s gonna have similar cylinder pressures as the 3.0L. And those seem to be doing fine so far.
Spray in liners (the name is somewhat inaccurate, its a chemical adhesion process) have been around for 30 years. They are very durable and are very low friction. The only downside of these is that if you score or otherwise damage the cylinder bores for any reason, the factory procedure will usually be to replace the block, whereas with other engine types you could re-sleeve it. That being said, by the time a modern engine block wears out (assuming the motor is maintained) you are talking about a 250k to 300k mile lifespan, which is excellent and the car doesn't owe you anything at that point.
Do you think the next wrangler will be automatic only? Stellantis had initially said the current model would be but oh boy they got nasty backlash on that. It still has a high take rate with the manual transmission.
My understanding is that the manual transmissions are not as efficient from a fuel economy / emissions perspective (it is easier for the manufacturer to keep the parameters set in a certain way to achieve a better result - I am probably not explaining it well), so there is a lot of pressure to eliminate them.
The epa kind of rigs the testing procedure to favor automatics unfortunately. Automatic transmissions started to become more fuel efficient than manuals only in the last decade or so. The usa also requires separate testing for every combination sold ie fwd/awd automatic fwd/awd manual transmissions. An epa certification is roughly a million dollars now. So four million dollars if you offer two transmission types and drive types.
Right. You explained it better than I did. Stinks because my first car was a manual transmission and I think it made me a much better driver. My younger son is driving and we want to get him a car (something reasonable) and finding a manual transmission in a car that is not a sports car is very difficult.
Before I went on the car shopping merry-go-round of tragedy, I drove a new 2025 Wrangler Sport 2 dr. with a 6 speed and pentastar; the local Jeep/Ram dealer had big discounts down to near 30K out the door. Terrible shifter and knob, mystery trans into the 3 or 5 gate and the motor didn't like the stick. Seating position is weird with your feet down into a well. But the car was brand new maybe the ecu needed some learning and who knows if I would have been able to accomodate the ergo and design oddities over some time in use.
Good to know they're still doing that.... This is what they do to the Ram's y pipe
Those formed pipes, the D pipe on the Ram and what appears to be Jeep Compass, have less of an affect on exhaust back pressure than most people think. The main drivers of back pressure are the catalytic converter substrates and muffler.
I know you're right, but I still don't like it!
Some mufflers- maybe many mufflers. Modern cats should not if unplugged, though close coupled cats are not good for extraction tuning. This compass has a giant muffler with two tail outlets each larger each larger than the one inlet, I think it's the same part that was used on the high(er) spec Hornet. The exhaust pipe is already seemingly undersized even for a for mid boost turbo tuning and just maddening to see it flattened just before it hit the rear muffler inlet. If this car wasn't a lease I would be at the local custom exhaust shop having this corrected.
You absolutely will not noticed a difference except the exhaust might melt or bounce into what it was flatten to clear. Exhaust's don't form pipe like that unless they absolutely have to. At best you might get back a kPa or two of back pressure by removing it and that would only be at Max flow rate and temperature.
