I just figured id post on here and say that I have been driving and towing with my truck for about 2 or 3 months with my rdl manifolds and uppipes and diamondeye downpipe. Overall,id say unless you have a race truck or pull truck these will not help you. I have lost almost 1o psi in boost and a little power due to no backpressure.but on the other hand I dropped about 150-200 degrees in egt when towing my gooseneck trailer. What I am trying to say here is that for the money i spent on this stuff, it was useless.I will never do it again,but sometimes you gotta learn the hard way.So if anyone is interested in my rdl manifolds (ceramic coated grey) and uppipes they will be for sale because i am probably gonna put my stock stuff back on

You could probably fix your problems with Tuning. But I'm interested in the manifolds and up pipes. PM sent

so am i how much are u looking to get

as am I

If you've lost 10 pounds of boost then you probably have a leak somewhere. Your results are not typical, but contact me if you want to return them.

Under no circumstance should you lose boost after this install, you probably have a boost leak. The intake pipe O-rings would be my guess if you deleted the EGR assembly.

Nick

Under no circumstance should you lose boost after this install, you probably have a boost leak. The intake pipe O-rings would be my guess if you deleted the EGR assembly.

Nick

Why do you say that?? I have heard 1-2 pound loss is normal. Less drive pressure= less boost right?

Why do you say that?? I have heard 1-2 pound loss is normal. Less drive pressure= less boost right?

I'd agree with your statement if we weren't talking about a drop in drive pressure due to improved Hot-side design. There may be a drop in drive pressure at the log manifold, but I would suggest that is due mostly to the major exhaust restriction moving downstream into the turbine housing where drive pressure might increase.

Also, consider the truck is a variable vane truck running a 'box program'. The desired boost tables have not changed since the install. The truck will try aggressively if necessary to make it's desired boost number.

Those are my thoughts on the topic.

Nick

If, you dont want them I will take them, I know what they can do!!

A drop in boost doesn't necessarily mean less air going through, it just means less restriction. On the receiving end, well ported heads can drop 5lbs boost while flowing a whole bunch more air. Compared to stock that RDL system flows a lot more freely, especially the up-pipes. It's a bunch more efficient. I'd do as they suggest and check for leaks. But getting 150-200 deg. less egt when towing is real good, that's nothing to complain about.

Thanks guys for the info.its just been on my mind since i put them on. I absolutely love the egt drop, but the boost loss has gotten me.the truck does not pull like it used to on level 5 when the boost would come up. Having less backpressure really makes sense to me for the reason for less boost.I had a few leaks at first but i fixed them.Also the downpipe hits the uppipe and thus had to sit really close to bellhousing so now it has an audible vibration at around 1200 rpm. All of this and it being so darn hard to get to everything has just gotten me down and i really cant figure out what to do

Thanks guys for the info.its just been on my mind since i put them on. I absolutely love the egt drop, but the boost loss has gotten me.the truck does not pull like it used to on level 5 when the boost would come up. Having less backpressure really makes sense to me for the reason for less boost.I had a few leaks at first but i fixed them.Also the downpipe hits the uppipe and thus had to sit really close to bellhousing so now it has an audible vibration at around 1200 rpm. All of this and it being so darn hard to get to everything has just gotten me down and i really cant figure out what to do

Get EFI live and give DURAMAXTUNER (Nick) a call!!

Thanks guys for the info.its just been on my mind since i put them on. I absolutely love the egt drop, but the boost loss has gotten me.the truck does not pull like it used to on level 5 when the boost would come up. Having less backpressure really makes sense to me for the reason for less boost.I had a few leaks at first but i fixed them.Also the downpipe hits the uppipe and thus had to sit really close to bellhousing so now it has an audible vibration at around 1200 rpm. All of this and it being so darn hard to get to everything has just gotten me down and i really cant figure out what to do

Things touching other things and making noise don't sound like what they are and it can drive you nuts. You have some good stuff already. Just get a twin turbo kit, the standard one using your stock turbo will be fine. There's no downpipe and lots of power. With EFI the truck will be much faster and more fun to drive.

Ok while i changed my oil today i looked for exhaust leaks and found none.also i only did and egr block instead of delete.again, where did the boost go?or is the stock turbo just doing what it can now that everything is opened up?

You need a relatively thick cap on the EGR. Is it still functional other than the lack of exhaust?

You must pressure test the system to find a boost leak. Pressurize the tube coming off the turbocharger to 15 psi and you'll find your boost leak. The engine should hold air.

Nick