Custom headers by Liverpool Exhaust (a few pics)

[Wibbit]

Finally got the headers put on the other day. This 3 piece item extends all the way to the catalyc converter so y-pipe design is also new, it includes 2 flex pipes and the whole thing is coated with HPC (http://www.hpcoatings.com/) inside and out. Heat from the headers is reduced significantly and the coating should allow for a longer life, also, sound is a lot quieter and with absolutely no drone.
In terms of performance, these headers were designed for low and mid range torque, and they deliver just that. 1st gear feels much more willing, and is now rid of the feeling that it's out of breath. Every gear revs quickers but as my mate Rauli (who kindly allowed his Vienta V6 Touring to be used for the custom build up in Sydney just for me) found out with his set, air/fuel ratios dropped and caused power losses. I can definately feel this and so the car needs to be tuned again. Here are some pics:

Original exhaust manifold:


New headers:

[dna59]

Looks sweet.

[SmokingTires]

That's tight shit man. How much did they run you?

It really doesn't make sense that the air/fuel ratio is falling because of exhaust flow though... Better scavanging should increase the air/fuel ratio because there is less exhaust still in the chamber. Maybe a mis-reading O2 sensor?

[Toysrme]

The more air the engine sucks in, the leaner it gets if the stock ECU isn't correcting for it.

Anyways AFA the A/F ratio getting richer... Look at the placement of the o2 sensor. It's only getting to read one cylinder per bank. The stock sensors read all three. Early bosal headers had that problem in 4runners. The o2 bung was way up on one pipe.





Looks good wibbit. Why on earth do you have that sexy new exhaust and the stock cat is still on there!? That bitch has to go go go. There's as much power putting in a test pipe as there is headers on that car LoL! If it's rusted out, it's nearly the same gain as the y-pipe gave you (if you add the fact that it's adding back lost hp)

[amerikim]

Pretty hot stuff...I wish I had same..How much $$$?

Agree with the sensor not being in the optimum place. Still, I want some.

Did you reset your car's computers? Resetting the ECU?

[Wibbit]

Yeh the sensor is pretty high up. So you'd tune it as if it had 3 times the O2 value because its only reading one pipe now? How did the 4 runner guys fix it?

i noticed the cat too in the pic, but it isnt stock, its a magnaflow high flow item. it looked much better when new!

The whole thing plus the HPC cost AUS$1050, so about US$820. but thats without installation and tuning.

[white90dx]

You are still loosing a lot of power with poor design there... get rid of those crappy collectors and cheater bends coming off the heads! JP Performance over here in Southern California already has a great set of headers, y-pipe, and 3" full exhaust w/ high flow cat that made about 30-40 wheel horsepower on a supercharged 1mz...

-Charlie

[Eye8Pussies]

those are sweet looking....

^ and those JP headers...HOW much do they cost in comparison???

[terrastrife]

Originally Posted by Wibbit

Yeh the sensor is pretty high up. So you'd tune it as if it had 3 times the O2 value because its only reading one pipe now? How did the 4 runner guys fix it?

i noticed the cat too in the pic, but it isnt stock, its a magnaflow high flow item. it looked much better when new!

The whole thing plus the HPC cost AUS$1050, so about US$820. but thats without installation and tuning.

1 grand hey?

im in :P

gues sill be driving to sydney

yroue not the only person to need a air/fuel remap becuase of liverpool exhaust

EDIT: ill knock up D&T again (wher ei got my y pipe done) and see what they want for headers (they do custom headers no probs), i get em done with all 6 primaries as longa s possible lol :P

[terrastrife]

Originally Posted by white90dx

You are still loosing a lot of power with poor design there... get rid of those crappy collectors and cheater bends coming off the heads! JP Performance over here in Southern California already has a great set of headers, y-pipe, and 3" full exhaust w/ high flow cat that made about 30-40 wheel horsepower on a supercharged 1mz...

-Charlie

and the jp headers look just as bendy too...

[Toysrme]

Bosal moved the o2 bung. That and everyone quit buying them anyways because they simply don't make much power. Blah blah blah headers headers headers.

They don't add much at all (as you can tell), so he has no reason to go importing the JP headers... They're NOT going to make any appreciable differance...




Wibbit first figure out exactly what, and when that is going on.


Yo ahve a '96, so that's a 3vz-fe.
(ooo he kicks everyone's ass! He's got the 200hp - 200lb-ft stock 3vz-fe hahahaha)

Take a volt, or multi meter and read the o2 sensor voltage while you accelerate at full throttle.
If it doesn't get to ATLEAST 750mv, you're running lean and need more fuel. If it passes 750mv by a TON, you're running rich.










Since you're going to have to correct across the board, you can simply do it with your AFM instead of buying piggyback, or modifying the o2 location.


I'll get pictures of mine later and show you exactly what to do.

[ag6286]

Originally Posted by Toysrme

Yo ahve a '96, so that's a 3vz-fe.
(ooo he kicks everyone's ass! He's got the 200hp - 200lb-ft stock 3vz-fe hahahaha)

uhhhhhh unless i mis read sumthin or skipped over sumthing....a 96 is a 1mz-fe not 3vzfe, 3vzfe is 92/93; u should know that by now.... Unless ur refering to the placement of the 02 sensors on the new headers...those resemble the 3vzfe yes...the 1mz-fe to my knowledge has one by the radiator and one towards the heat shield of the cat.

[Hamsterman]

damn, those are pretty tight, and i bet they get the job done, when all of my friends have gotten headers, i really noticed a nice sound improvement, and they all ususally say they feel some decent pick-up...

never had any friends get v6 headers though, bet they sound mean

[Toysrme]

It's the big bad 3vz-fe.

Only North America used the 1mz-fe from 94-95 and very few markets use dthe 1mz-fe in '96. Australia had <the 3vz-fe> it through 96' and some parts of asia / japan were still using it into the '97 model year.
We shoulda had that engine... 3vz-fe torque curve with 200hp from fuel / ignition tuning.
Mind you they get to run 98 ron so they get away with it.

[Toysrme]

Obviously, his engine is a 1995 3vz-fe.

Look at his left head.



Compair that to Tony the Tiger's '94 1mz-fe head back when it was stock.



Note the billion differances there.