142 lb ft of torque stock @ 3400 RPM's Seth....

Bring your truck to my neck of the woods and go to the "Dyno Shop"

You didnt' say what tires, or mods, you might have. But I can tell you that with the 22RE you do not have any *surplus* power, so if you're trying to run 33s with stock gears then Of Course you lost all highway driving power.

And a few measely horsepower is not going to help much.

Would i actually gain power by switching back to 2" piping? I understand the concept, but part of me thinks that would choke the flow.

With the mods in my sig on my 22re I can keep it at highway speeds all day long I usually cruise at about 65-70 and still have plenty left.I can't wait for my 4.88's as I am still running stock gears.It climbs a hill to work that climbs 3,500 ft over 12 miles at 60-65 in third all the way up with 2- 200 lb people in it. :bigok: I love the new power.

you may gain some power at lower rpms. here's how it was explained to me when talking about exhaust pipe size:

first, back pressure is always bad, anything that makes the piston do extra work in geting rid of the exhaust is a bad thing and takes power away from you. when the hot gasses come out of the cylinder they expand into the exhaust pipe, as they expand they cool down. it turns out that hotter gasses flow easier than colder ones. the goal is to get the volume of gas out of the pipe as quick and easy as possible. intuitively, you'd say a larger pipe will restrict the exhaust less, and that's a good thing. but if the pipe gets too large, then the gasses will expand and cool off, making them flow less easily and actually create more backpressure. so what you want is the biggest pipe you can get to have the least restriction without going too big that the gasses cool of and cause more restriction - it's all about optimization.

now the question is, what's the right size pipe to use? well, you need to specify where you want the least backpressure. at low rpms you'll be making less exhaust, so a smaller pipe will be better, and it turns out that for our 22re's 2" is the optimal size, a 2.25" pipe will allow them to cool too quickly. but at high rpm, the volume of exhaust gasses is larger so the 2" actually causes a bit of restriction and 2.25" is optimal (a 2.5" would probably be too big and the gasses would cool off to quickly).

so in the end it all comes down to optimizing for the rpm range you drive in the most.

Good answer...

So, how about we design a dual piping exhaust system? At the header collector it can change between 2 sizes of exhaust system based on rpm/load.

I have a car with a variable length intake runner length manifold - works great, similar concept!

It's not unheard of, the 2006 Corvette Z06 has regular muffled exhaust at regular driving (outer 2 pipes), but at higher flow, the inner two pipes open with a vacuum actuated valve, and you have straight unmuffled exhaust out :rockin:
Gotta come up with 500hp somewhere...

http://www.motorsm.com/USA/cars/imag...tte_Z06_TM.jpg

But, that might be overkill in this case :lol:

I am assuming that you have stock...or smaller tires on it??? And 65 in third? I am also assuming that you have an automatic? I don't know if it is much differend than a stick as far as gear ratios.

I have 33's and a 5 speed.I can keep a steady speed of 60 but hit 65 in some spots.The truck is faster now than it was with stock engine and tires.I can also power brake the 33's.

I was under the impression that my Truck has 190 horses. Its a 2001 Tacoma Dcab 4wd V6.

-3 inch exhaust
-30 inch glasspack
-FIPK Gen II

Im thinkin around 200-205? Any realistic guesses out there?

probably not. I dunno how toyota used to rate their motors but it was probably without a/c, no fan/clutch, minimum exhaust, 0 weight motor oil, a hp friendly dyno and of course at the flywheel not at the wheels.

If you noticed the 2005 v6's horse power dropped in 06. They didnt change anything they just joined the growing group of car manufactors that are having their HP and Torque regulated to a standard.

That sucks :(

3 inch exhaust!? Dude that is killing you for power. Get that back down to 2.25 unless you have forced induction - in that case go 2.5.

By the way I smoked a BMW 535i today :laugh: Man was that pretty boy surprised!

I'm a bit surprised. On my 4runner I shift into 5th by the time I hit 65.

While cruising on flat ground I go into 5th at 55.It will cruise in 5th nicley and it accellerates great.If I downshift it takes off.I keep it in third going up the hill to keep my rpms up.I go to 4th a fe times but it climbs the hill great in 3rd.I beat a tacoma to 60 the otherday:D I am surprized at how much more power this thing has.I am getting the gears soon.Next will be a supercharger!