Well I just had a 4" diamond eye turbo back exhaust system installed on my 01 F-250 PSD. I'm honestly not that impressed with the new performance. I asked the place that installed it what size my stock system was. They said 3.5". I hear everyone on this site say how nice the 4" system is but can a 1/2 inch really be that much of a difference. The new system sounds the same as the stock and I don't notice any horsepower gains. The main reason I upgraded was for towing with a chip. It seems to me that my stock 3.5" system would have been sufficient. Did I waste my money???????????

 

Two questions:

1. Is the chip installed?
2. Did they install the downpipe as well?

 

I'm new to Ford SD's.....what's a downpipe?

 

I have not installed the chip yet and it was a full 4" exhaust including downpipe that I put on. I just feel like there is not a big difference between 3.5" and 4". When I install the chip I want to keep my EGT down but will a 1/2 inch really make a difference????? I guess I just feel like I wasted my money.

 

The exhaust pipe from the turbo to the bottom of the truck.

 

I relpaced a 3.5" exhaust system on my '96 with a 4 inch system recently, and the difference is noticeable, particularly with the turbo spool up, and the exhaust temperatures. I paid $300 for the system, and think it was a very worth while modification. I needed to do this a long time ago, but only just got round to it. I now have the full benefit of all the other modifications this truck of mine has.

 

also known as "mr badwrench" (trust me). the PSD stock downpipe has a kink in the bend im told? Lookin for a 4" system (turbo back) do i HAVE to get a chip too? its goin in a 2002 E-350 7.3 , and i read theres no intercooler, so i gotta keep the EGT down? a lil help , folks? many thanks stay safe, jimmy

 

Ryanben, the primary benefit of the larger exhaust is to allow you to make more power via, chip/turbo/whatever mods and keep the egts under control. The larger pipe helps move more air through the engine.

 

Typically, with a chip, your EGTs will go up, but after you install a 4" exhaust, your EGTs will go back down. So basically, your exhaust will allow you to make more power and torque safely. Yeah, what davhut said .

 

what's egt stand for? exhaust g???? temperature? and what's the benefit of it keeping it down?

 

exhaust gas temperature...sorry i gotta nother post for this one...freebie!

 

With 30% more pipe area and no changes on the motor what did you expect?
Get the chip then come back with your results and EGT readings.