Titans need backpressure my A##

14685 Views 221 Replies 33 Participants Last post by DRTYAZN, Jun 3, 2011

deerslayer

Discussion Starter · May 16, 2011

Here is a video from a member on CT. He was running 14.0X forever with 07+ exhaust with 2 spintec mufflers. Now he's running just straight pipe after the headers with 2 14" magnaflows and ran a 13.7. He has NO X pipe or Y pipe on his truck. We argue on here about the X or the Y being better and now we have a member running this....LOL

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deerslayer

Discussion Starter · #21 · May 18, 2011

Gene 5.6 said:
Any backpressure isn't good for an engine. But remember that an exhaust setup is only as good as the other modifications before it. The intake, throttle body, intake manifold, heads and cams all dictate where the power will be made. I thought about doing a 3" true-dual setup on the Titan. But without any other options for an intake manifold/throttle-body the VK56DE is strictly a low-end/mid-range motor. It's not made for high-end performance where a true-dual or any extreme flow system would shine. I also have speculations that the VK56DEK (07+ up motor) might have more then just IVTC in comparison to the earlier VK. Why stick an entirely different cam control system and intake manifold on a VK without opening up the head up a bit? I'll be finding that out soon enough.

So for the VK56DE, I think a 2.25" true-dual (ie. NISMO) would be an ideal setup to retain most of the low-end/mid-range but also gains some ponies in the higher end.

Thats why Im going to try 3ft of 2.25" pipe with the 2.25" borlas on ea side. The 3ft of pipe will keep the exhaust velocity up. Ive been reading tons of posts where guys gain .1 to .2 with a retune (addin fuel) with open headers or straight pipes off the headers. Ill try it after I run my current setup to see my header gains. If it doesnt work, oh well

Gene 5.6

· #22 · May 18, 2011 (Edited)

If I had it my way I would just eliminate all catalytic converters, JBA shorties, sim off the rear o2s since all they're good for is catalyst efficiency and throw some magnaflow 14" 2.5" I/O round resonators on right after the headers and then dump them right then and there. So it's basically headers -> resonators -> dumps. It will be gnarly loud but I think eliminating the y-pipe would show some interesting gains in the high end. Then it's all up too getting a better intake manifold to really magnify those gains. Something with short runners, velocity stacks and a nice meaty plenum would be ideal.

The VK56DE has a ton of potential that has yet to be unlocked.

deerslayer

Discussion Starter · #23 · May 18, 2011

Gene 5.6 said:
If I had it my way I would just eliminate all catalytic converters, JBA shorties, sim off the rear o2s since all they're good for is catalyst efficiency and throw some magnaflow 14" 2.5" I/O round resonators on right after the headers and then dump them right then and there. So it's basically headers -> resonators -> dumps. It will be gnarly loud but I think eliminating the y-pipe would show some interesting gains in the high end. Then it's all up too getting a better intake manifold to really magnify those gains. Something with short runners, velocity stacks and a nice meaty plenum would be ideal.

The VK56DE has a ton of potential that has yet to be unlocked.

Thats basically what Im trying, ill keep ya posted.

O-FiveCC

· #24 · May 18, 2011

Pm when someone tops 99.1 headers only NA!!! =) (pot stirring)

RB's Titan

· #25 · May 18, 2011 (Edited)

O-FiveCC said:
Pm when someone tops 99.1 headers only NA!!! =) (pot stirring)

try this one for top end 99.37 mph....in FST and 20's:
13.90 outside view video by houseofbaker - Photobucket

or this one at 100.7 mph FST with 18's:
http://s93.photobucket.com/albums/l80/houseofbaker/?action=view&current=Qtr100mph1390MyTitan.mp4

I got (2.5" , resonators, magnaflow cats, y collector) so stir, sir stir..

Reactions: 3

titanss

· #26 · May 18, 2011

Here is mine, 99.51mph.

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Reactions: 4

DRTYAZN

· #27 · May 18, 2011

deerslayer said:
Thats basically what Im trying, ill keep ya posted.

I'm hoping your experimentation produces great results... because I will be customizing my 06 4X4 afterwards... My header back system is already Frankenstein'd enough, so i need to get proven data before spending the money to get custom bent pipes for my new exhaust set up...

deerslayer

Discussion Starter · #28 · May 18, 2011

DRTYAZN said:
I'm hoping your experimentation produces great results... because I will be customizing my 06 4X4 afterwards... My header back system is already Frankenstein'd enough, so i need to get proven data before spending the money to get custom bent pipes for my new exhaust set up...

I'm going to run the y setup friday, then hopefully get the 2 borlas on, get retuned & run it the next weekend. We should have some results in less than 2 weeks. If time allows all testing will be done this weekend.

Reactions: 1

Toomnymods

· #29 · May 18, 2011

103.4mph n/a and that was with a y-pipe go figure

deerslayer

Discussion Starter · #30 · May 18, 2011

Toomnymods said:
103.4mph n/a and that was with a y-pipe go figure

Before cams? Just headers?

htown

· #31 · May 18, 2011

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This is my set up i got 2.25 from the cats to a y pipe 2.25 to 3 out to a cherry bomb and it made a huge difference in hp and torque and it sounds like a beast i just need to go test it at the track

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htown

· #32 · May 18, 2011

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08crewcab

· #33 · May 18, 2011

wow that y looks gnarly,

TITANsmurf

· #34 · May 18, 2011

Remember, if you run a larger exhaust you should reset your ECU so it compensate for the slightly increased air flow, more air out means more air can come in, cams\intake = profit

.

Toughtitan08

· #35 · May 18, 2011

htown said:

All I can say is, hope you didn't pay much for that............:ftard:

Toughtitan08

· #36 · May 18, 2011

I don't even have access to a pipe bender or a lift and I can do sooo much better than that junk. Sorry for being an azz but that ranks up there with some of the worst exhaust fabs I've seen in quite some time. If you paid over $150 for that mess, you got ripped. One of the many reasons I don't take my vehicles to any exhaust shops unless I know the fabricator personally and I physically can't do it myself.

deerslayer

Discussion Starter · #37 · May 18, 2011

After I get the money I'm going to try a 2.5/3.5 Y pipe setup if the straight pipes off the headers don't work:teethmast Got the borlas so cheap I have to try it.

htown

· #38 · May 18, 2011

What exactly is wrong with it...it looked good at first but i work building pools n at work the sand messes the metall up..i paid 200 including the muff

DRTYAZN

· #39 · May 18, 2011

:rofl: you guys are bad... give the the guy a break... it's a Frankenstein exhaust setup... I'll get a picture of mine... but mine looks decent, IMO... dual 2.5" pipes to a custom Y into my 3" muffler inlet... I may just go true duals, depending on deerslayer's testing...

Toughtitan08

· #40 · May 18, 2011 (Edited)

That's what it SHOULD look like. This was around $289 and as you can see, is much, much better.

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