Greetings everyone. I have been searching and reading threads for a week and so far, have not found a discussion which indicates where the flow restrictions are in a 3rd Gen '06, in order of biggest to smallest. I am interested in this so I can consider as I make mods.

I tow horse trailers and operate in the mid RPM range, so my question is for the mid RPM range ONLY.

I would **guess**, based on reading all these threads, the following. The "effect" is how much difference a less restictive mod would make to the airflow in the mid RPM range:
1. Stock Turbo backpressure (big effect)
2. Stock exhaust system (big effect)
3. Stock airbox (medium effect)
4. Cam (in the sense of increasing lift & duration on both I and E) (medium effect)
5. Air Horn (small effect)
6. Intercooler (very small effect)

Does the intake plenum cover come into this at the mid RPM range, ie a product like the GDP Air-Boss CR Intake Plenum Cover? I am not considering porting the head.

Thank you for the benefit of your experience and testing!

PS: I will have the PSM modified airbox installed on my truck and a Smarty Jr. programmer in the next few days, so don't give me heat about the Edge or AFE--I am taking your advice!

 

The intake horn is probably the biggest restriction and then some will say the heater grid under that is also a restriction.
some will say the better flowing intake horn really does not help much but it does let the turbo spool a bit faster.

As for the exhaust, you can easily stay with what you have. You could lose the cay but most people say it has no affect on power. Possibly lower exhaust temps but not by much. There are some people running 450+ HP through a stock system.

 

In the few years I have been here reading the guys that really know their stuff, I haven't seen ONE SINGLE REPORT of any big air intake or exhaust modification that has made power on a dyno.

If any of these mods EVER did anything, there would be solid numbers backing them.....

Seat of the pants feelings are of course different. Louder engines are more powerful.

 

For what you are doing there is no restriction. Just money that the manufactures would like you to spend. You will not get a benefit on the 06 with what you want to do. Stock exhaust works well into the 600 range. Stock turbo works well up to 450 hp then gets a bit hot. Stock airbox cannot harldy be beat. Us the 4" NAPA gold filter. Cool air and great filtering. Air horn very small effect. Intercooler is a complete waste at this level. Cam can help but expensive for the moderate gains at your level. Run the Jr. and be happy. My 2 cents

Damon

 

So why do people want to balance out the drive pressure and boost pressure and replace their stock turbos, even if they are shooting for 450hp or less?

 

My AFE Bladerunner made no seat of the pants difference.
A had a freer flowing muffler put on and kept the cat.
Smarty's a must and a bargain for it's power enhancing effects along w/dropping egt's substantially.
The PSM/Home Depot mod along with a NAPA 9946 works super.
I do wish the tire companies would release a 275-80-17 E-rated tire. Tall and skinny like me.
Mechanical gauges.

 

for your truck pulling horses i ca give you proven things to do. your truck has in-cylinder egr if you will do the following you will increase mpg by 40% and reduce egt by 300*. change the cam to a pdr or colt, change the nozzles to 50 hp ddp's, get a smarty jr and set it on default economy. get a fbd 5" turbo back straight pipe kit and a donaldson m090072 resonator and m101181 muffler. nothing else is cost effective. a psm kit to the stock air box does help a little bit look up home depot version to save $ i think the psm is $100 the depot is about $20 use wix 49946 filter. you can gut and port the heater for nothing, a cfm+ is the best horn but payback is about 700,000 miles
http://i1141.photobucket.com/albums/...rljr48/212.jpg
http://i1141.photobucket.com/albums/...rljr48/146.jpg
http://i1141.photobucket.com/albums/...rljr48/081.jpg
http://i1141.photobucket.com/albums/...rljr48/064.jpg
http://i1141.photobucket.com/albums/...rljr48/060.jpg
http://i1141.photobucket.com/albums/...rljr48/152.jpg
the airtabs shown in the pix on the truck and your trailer is worthwhile i do not think your horse trailer will benifet from the wing.

 

Hello,

Ballancing drive and boost pressure is for twins. People always want more turbo. That's fine but not needed for the 450hp and less crowd. A few here have hit the 500 mark(stock turbo) but got to hot for my liking. I have limited funds and listen real close to thoes who have made big gains with minimal mods. It's all about ballancing components for the efficency in your power range. Other spending makes people feel good and think they have more on tap than likely they really do.

Stick the Smary Jr on there and put the 4" filter in the stock box and see how you like it. Cannot go wrong with this simple step.

Damon

 

Air tabs???

C'mon. I'm a pilot. I have a little knowledge of aerodynamics, enough to know that any air disturbing tabs on a vehicle like a truck traveling under 130 mph will never pay for themselves.

You'd be further ahead with air dams and gap seals. Even NASCAR racers don't have air tabs.

 

The '03-'04 trucks have no egr cams and equipped with straight pipes,psm etc get nowhere near a 40% better fuel economy than the '04.5-'07's that I'm aware of.