Turbo Down pipe - Diesel Forum

KillerK9 · 08-06-2008, 08:48 PM

Hey all
I need your expertise once again. Im gonna change out my down pipe to the larger one. I looked at ATS and they sell the pipe for about 88.00 bucks. They also sell a kit that changes out the turbo outlet housing to accomodate a larger opening, therefore a larger diameter pipe opening. My question is this, the truck only has 31000 miles on it and I really dont want to pull the turbo off unless the change is gonna be incredible. Will I be ok just swapping out the down pipe or should I change the turbo housing as well. I only use the truck to haul my 5th wheel a couple a times a year other than that its just a couple of time a week maybe for a depot run or somethin. Part 2 is if I change the down pipe do I have to change all of the exhaust or can I weld the new pipe to the existing exhaust. Im not even sure what size the factory is. Help I need Giudence!!

chuckster57 · 08-06-2008, 10:02 PM

IIRR the down pipe and pre muffler exhaust is 2 1/2" on my sig truck. I have sent 2 e-mails to ATS to ask about the "replacement" down pipe. It says on their web site that it only fits P/N WG**. when you look for that P/N it is the aurora turbo system. I have asked if I need to change the turbo outlet housing for the 3" down pipe. I plan on building a new exhaust using 3" and a Walker BTM muffler. Have read that it will boost numbers to about 240 hp and 400+ ft lbs torque. To date I have not recieved an answer. There is a dealer about 20 mi. from me and I may have to take a drive on my days off.

KillerK9 · 08-07-2008, 07:49 AM

Chuckster
It appears that you and I have the same truck. I did some research on the ATS website and found what I believe to be just the down pipe. The part number is 73301WGK and list for around $88. The website is less then user friendly but I think its the right one. So i guess that means that Im doing a complete exhaust on the truck if I change the down pipe then. On a side note, I see that you have the hypermax cowl induction, do you think it helped any with airflow?? I just took delivery of mine but was thinking about sending it back cause I didn't want to cut the firewall out. If you have any pics of that you could send me I would greatly appreciate it. Thanks

FreightTrain1107 · 08-07-2008, 09:37 AM

I wouldn't bother with the muffler guys. When I redid my turbo and exhaust a bunch 'o years ago, I started at the turbo with the housing and elbow. The 3" dp is ment to go into that elbow, but it's pointless to make an upgrade like this and not go the whole way.

The turbo will pull off fairly easy, and the turbine housing comes apart no problem. Change the housing and elbow, while your in there, you'll need to trim the cab flange for the new dp. Once all that's done, you can run the exhaust from a powerstroke truck (mine was from a '95) and forget about the muffler. You'll be surprised how quite it is when your behaving, but lay the foot to the wood and it'll sound like a ripped up drag bike. As far as power comparison, as long as your motor is tuned and up to snuff, you'll notice an instant increase in 'snappyness' and boost numbers start to come up at a much mower rpm than they did before.

Before to after comparison for me is ths part of the highway around here that gets a little steep and is about a mile long to the top. Once and a while. I have to haul around this little backhoe for digging trenches which weighs around 5000lbs. The trailer adds about 3K more to that, so figure 8Klbs. On this hill, I would have to get in the right lane, put it in 4th, and she would hold steady around 50mph all the way to the top. After the exhaust overhaul, she'll whip up that same hill in the hammer lane at 70mph in 5th gear.

I also recommend putting in decent egt and boost gauges so you can watch these things when the foot is planted.

LMJD · 08-07-2008, 09:51 AM

Quote:

but it's pointless to make an upgrade like this and not go the whole way

Right, the original ATS kit (not Ford factory) comes with a 3" turbo outlet casting, 3" downpipe, and 3" exhaust from end to end with a 3"straight thru muffler.

FreightTrain1107 · 08-07-2008, 10:33 AM

Quote:

Right, the original ATS kit (not Ford factory) comes with a 3" turbo outlet casting, 3" downpipe, and 3" exhaust from end to end with a 3"straight thru muffler.

Exactly. You had to see the look on my face the first time I pulled the original ferd downpipe. It looked like something somebody ran over with a dump truck.

Opening up the exhaust is one of the best and one of the first mods that needs t be done to these trucks.

KillerK9 · 08-07-2008, 02:10 PM

anybody have any "how To's" on how to remove the turbo or what's involved with it??. Maybe even a picture or 10?? Im a picture guy, cant understand them readin directions so well. If you guys say its worth it then I'll go all the way.

dakotajeep · 08-07-2008, 02:32 PM

Not to hijack the thread BUT....my truck is NA but I am seriously considering a turbo in the near future. What down pipe can I get to replace the factory one that will fit to a turbo system. Are their any compatability issues I need to consider?

Thanks
Thad

JASTECH · 08-07-2008, 02:36 PM

KillerK9, on a distant side note what kind of killer k9 do you have?

KillerK9 · 08-07-2008, 04:06 PM

Quote:

Originally Posted by JASTECH

KillerK9, on a distant side note what kind of killer k9 do you have?

He's a German Shepherd imported from the czech republic ( when there was one) I like him better than most people

chuckster57 · 08-07-2008, 04:36 PM

Quote:

Originally Posted by KillerK9

Chuckster
It appears that you and I have the same truck.a side note, I see that you have the hypermax cowl induction, do you think it helped any with airflow?? I just took delivery of mine but was thinking about sending it back cause I didn't want to cut the firewall out. If you have any pics of that you could send me I would greatly appreciate it. Thanks

I was a little unsure of cutting the firewall myself but I am glad I did. I have noticed a BIG improvement. I get more boost and way faster spool up. truck warmed up and "get on it" I can see 6 lbs. instead of 2-3 and holds boost at cruise speed. It seems like I have improved MPG maybe +2. We are planning a camping trip soon so I'll be able to really test it. I agree that the stock dp HAS TO GO !!! I just figured that it is just as easy to build a 3" exhaust and I can get the BTM for about $75.00. I have gauges. If you want a few pictures. PM me and I will take some and e-mail them to you!!

chuckster57 · 08-07-2008, 05:18 PM

Quote:

Originally Posted by FreightTrain1107

The turbo will pull off fairly easy, and the turbine housing comes apart no problem. Change the housing and elbow, while your in there, you'll need to trim the cab flange for the new dp. Once all that's done, you can run the exhaust from a powerstroke truck (mine was from a '95) and forget about the muffler. You'll be surprised how quite it is when your behaving, but lay the foot to the wood and it'll sound like a ripped up drag bike. As far as power comparison, as long as your motor is tuned and up to snuff, you'll notice an instant increase in 'snappyness' and boost numbers start to come up at a much mower rpm than they did before.
I also recommend putting in decent egt and boost gauges so you can watch these things when the foot is planted.

I was planning on changing the turbo outlet housing, wasn't aware of the elbow needing changing. As far as muffler..I lived with an '86 gasser 460 with headers and dual exhaust with mufflers that had the baffles "cooked" out of them..IT WAS LOUD!!!! when I romped on it. I am at the age that noise isn't all that neccessary and the wife and the dog and cat didn't like it AT ALL!!

Steve250 · 08-07-2008, 06:57 PM

Quote:

Originally Posted by FreightTrain1107

Before to after comparison for me is ths part of the highway around here that gets a little steep and is about a mile long to the top. Once and a while. I have to haul around this little backhoe for digging trenches which weighs around 5000lbs. The trailer adds about 3K more to that, so figure 8Klbs. On this hill, I would have to get in the right lane, put it in 4th, and she would hold steady around 50mph all the way to the top. After the exhaust overhaul, she'll whip up that same hill in the hammer lane at 70mph in 5th gear.

What's EGT?

On a regular basis we tow a 6k backhoe on a 2.5k trailer and we have alot of hills during our normal half-hour drive... we're considering putting in an ATS turbo system on our '92 250 7.3 IDI, I was recommeded to get the exhaust system with the kit and also the pyrometer bring the whole package to $2,658. From reading this thread it looks like the turbo system is well worth it.
The reason we're considering the turbo is because our truck groans and slows down on the hills. There was one time when we took 5 huge logs on the trailer on the way to a mill and we were going up a steep hill when the truck just came to a stand still on the hill! We had to back down the hill! Threw it into second and got stuck again! Finally we put it into first and it pulled it right up over the hill. (btw, we dumped 2 quarts of overflowed tranny oil after that)

Not to hijack the thread but is the turbo worth the 3k?

Thanks,

Steve

chuckster57 · 08-07-2008, 07:38 PM

Quote:

Originally Posted by Steve250

What's EGT?
Thanks,

Steve

Exhaust
Gas
Temp

Very useful information when you are towing. Hit a hilll and press the go pedal to keep speed up and watch the EGT's go up. It will help you decide that it's better to back off the pedal instead of melting something (pistons/Turbo). Also if you "turn up" the injector pump. From what I have read here 1250 PRE TURBO is max.

chuckster57 · 08-08-2008, 04:03 PM

Quote:

Originally Posted by LMJD

Right, the original ATS kit (not Ford factory) comes with a 3" turbo outlet casting, 3" downpipe, and 3" exhaust from end to end with a 3"straight thru muffler.

I ordered the kit just a few minutes ago. I did it by phone and got a break on the price by mentioning TDS. The part # is 73UK-T. It gets you the upgraded turbine housing, upgraded outlet housing and down pipe w/bracket. I didn't buy the complete system (73UK) because I can built an exhaust for less than the extra $300.00 .