Once I get all the parts in about a week I'll post pics, prices, videos, and soundclips.

Heres the run down of my (soon to be) set-up:
3.0 rebuilt in '04
Performance cams
No EGR, No PAIR Reed valve.
3 inch PVC Intake
Downey Headers (2.5", Chrome)
2.5" crossover, welded
2.5" pipe going to Cherry Bomb Turbo, 2.5" out
Exits same as stock, with a angle tip.

I'm going with 2.5" piping, not 2.25" because of the cams (someone correct me if I am wrong). 2.5" piping should still have enough back pressure, no?

Will be excited to see the results soon, and the sound.

Right now I have the driver side going into the stock muffler, and the passenger side open. It's loud as hell, and annoying but it's only temporary.

I lost all my low end torque, but it'll be back with the exhaust.

 

/me has little concern over the lack of EGR valve but then again, it's not my air, right?
and no PAIR? why not? PAIR takes about 0 HP to operate and cleans up the exhaust a bit, almost enough to overlook the lack of EGR... but not quite.
... and you should have all the exhaust going by the O2 sensor, but it's not my truck so what do you care?

 

Because I don't have the copper tubing for it, lol

It's there, just not in use.

As far as the O2 sensor, Its only till I get an exhaust.

 

2.5" exhaust may be a little big, I'm curious to see how your low end reacts, keep us posted.

 

i believe the factory piping is 2 inches so 2 1/4 should be plenty! If you were super charging i'd say 2 1/2. I dont' think cams are gonna push out that much more hp. Just my opinion. As far as egr goes, It brings down engine temps among other things. Not having it working is not something i'd recomend. especially with a 3.0. Good luck with whatever you decide. dont forget to ge sound clips of the exhuast! before and after maybe?

 

Stock exhaust size is 2 1/8" pressure bent.

 

well the crossover will be 2.5", from Downey. all the shops want $250+ just to make the crossover. the piping after that can be whatever.

from what you guys say it looks like 2.25" will be my best bet for after the crossover.

how does the EGR decrease temps if it pumps hot exhaust air into the engine?

 

Just throwing it out there, if your looking for some Downey headers for the 3.SLOW.. Theres a set on Craigslist in Montana. Heres the link.. http://montana.craigslist.org/pts/1093365703.html

 

2.5" is much too big! With headers you will lose low end power...

Stick with 2.25" pipes..

The EGR cools the combustion chamber by introducing inert gas (cannot burn) thus cooling the motor... Or so they say

 

Ah, gotcha. But my MPG increases, and it is a bit quicker, so I'll leave it out. Besides I cut the pipe that goes into the intake out of frustration when I removed the old engine. Whoops.

I have one video clip of how it sounded stock from last winter. A clip of it with stock manifolds, but ended with no cat. (needed new gaskets). And a clip of the same set=up only with a cat on.

I can take another one of straight headers, just to show you how LOUD they are, and then the final completed one.

 

Do it

What cams are you going with?

 

I dunno. lol. It came with the engine.

Got it from the shop today. $90, welded everything together, put hangers on, welded the o2 bung in.

I went with a Cherry Bomb Turbo, with is the next one up from a glass pack.

Results:I like it, especially for the money. Now that everything is all buttoned up, (save for the EGR hole and O2 [need to get a new one]) I get a real feel for how it performs verses my old one. Much, much better than my old 3.0. Idle is smooth as glass, throttle response is great, and I noticed a definite improvement in acceleration, and overall performance.

Pictures and videos when the sun shines. It's raining here.

 

Photos & Videos are uploading.

Quick question about the O2 Sensor.

I had to get a standard screw in type O2 sensor bung welded on. Auto parts stores are of no help. I'm just looking for a 4 wire sensor. Any help would be greatly appreciated.

 

Heres a video

 

obviously you are going to the wrong auto parts store, maybe deadzone. go to checker, shucks, kragen or o'reilly, ask them for a p/n- 15732 bosch oxygen sensor, its a 4 wire universal, with all the professional splice connectors.

 

Thanks! Have you used one before? any difference to OEM?

 

ya, on the mrs mini van, pain in the ass to wire, but works just like it should. i work for kragen, just had a customer in for an old t-bucket he was converting to injection, sold him the same one. When a customer walks into our store, we treat them the right way, we all have an open mind to suggestions and ideas. Most stores i have been into (our company and others) the employees treat the customers like crap, its just wrong. but yeah, its just a run of the mill O2 sensor. Its a 4 wire, heated.

 

I'm gonna go get one today. I'm getting 14 MPG, lol.

I'm realy enjoying the new exhaust too. Nice rumble.