All sight that i have visited, the down pipe is 3" and the rest is 4"

Maybe my thinking is wrong but,...I would think that a 4" down pipe and 3" the rest of the way would be less restrictive then the 3" to 4"!!

Just my "theary" the air is the hottist (expaned) going thru the turbo,as it travles down the pipe it cooles (contacts,srinks and slows down). there for the tail pipe could be smaller then the down pipe and not be more restrictive! Wiall the ether way(3"to4") the 3" is the bottle neck or the flow damaner? Right? or am i way of base?

 

Bigger is better, well for the most part. Rip Rook sells a 4" downpipe for our trucks.

http://www.sourceautomotive.biz/

 

thanks!

http://www.sourceautomotive.biz/sa_d...3_downpipe.htm dus this look like a crimp bent pipe to you are is it a mandrel bent?

I'm going to call juts thought you guys might want to take a sec. look!
Just called and it is a mandrel bent pipe but boy it shore don't look like it!!
UPDATE!!! It is a mandrel bent pipe!!Yaaaa

Well that's good! Now's all i have to do is save up for the hole kit and then fined and adaper to go between the ex-brake and the 4" down pipe?

 

That is a 4 inch mandrel bent pipe that fits so nice and neatly, its unbeliveable! hehehe I have one ORDER THE ADAPTERS! Its worth the few extra bucks. The pictures arent the greatest, but go to my link in my Sig. and click on the stack project album.

Oh and a 4 inch DP is better! hehehe IF/WHEN you order it, PM me and i'll tell ya what ya need, what NOT to do, and how long it took me with a set of ramps, a sawzall, tape measure, and a vise. oh and a welder.

 

Did you us or buy the hole ex. kit, or just the 4" down pipe?

 

I've got a pretty good picture of the rip rook 4" downpipe in my photo gallery here. Note the crappy welds!

 

I just installed Rip's 4 inch downpipe on my revived 93. I swapped the Piers 35 for a Diesel Dynamics Jammer turbo I had just aquired. This turbo has a 4 inch outlet, and Rip's downpipe fit it perfectly. Just waiting for the remaining exhaust pieces to show up.

What small runs I did make, it sounds and hits real nice now.

 

I agree and disagree. You only have so much air coming out of the turbo. While yes the 4" would be less restrictive, I doubt you will see much if any notice between the 3" DP and a 4" DP in a stock/near stock config., unless you start adding lots of fuel to the point where the 3" does become restrictive. When I went to a 4" DP over a 3"(rest was 4") I didnt see any difference in Temps, but I cranked my fuel back quite a bit too.

 

So do thay have diff adapter for the pipe? I need an adaper that will fit my ex.brake its a flaired, two bolt afair......Kind a like the 2nt gen turbos elbos.. w/out the waste gate...Hmmm i wish i had a 2nt gen truck to look at right now,that just my be, the adaper that i need!

 

Glad to see some one has an opinion on my theory!!!!

Thanks

to bad that you added fuel when you put the 4" down pipe!

 

looking at you pic a little closer i figured out the adapter!

Im going to have to us the same adapter as you and us the stock pipe end, were it bolts to the ex-brake or turbo in you case!
Maybe this isn't going to be as difficult as i had made it out to be!!

 

heres a complete 4 inch for our trucks, turbo back
http://www.stans-headers.com/diesel.htm

 

Considering what I spent on my exhaust system, I wish that I would have known about that, loch.

 

LOL sorry,

 

Hey, no problem!