My opinion is simply this:

Its a great mod for the money, if any other headers come out like this obx with bigger diameters and collectors, they will rein supreme.
It will be much easier now, for everyone here to reach and go over the 200WHP mark with these headers. However TQ will suffer for the 3.2 liter guys. I know Kenso has 203WTQ but, he also has stock exhaust manifolds and stock TYPE II catback exhaust to help that number out.

Based on my dyno experience I cant imagine John's car had any more than 185WHP, so he esentially gained 12WHP with headers and no cat.

Get a bayou chip man, and watch that number fly over 200WHP easy.

~Dv8

 

Wow that's amazing considering his 91 coupe is basically a typeII automatic.

That's close to 15-18whp over some of the ones below:

Thai.95LCoupe's Dyno Numbers 95 L KA8 AT

Mods:
Custom Cold Air Intake
Dinan Stage II Chip
Legend Spec. Remus Exhaust

Numbers:
Max Power-182.7 @5300rpm
Max Torque- 168.5 @5300rpm

94Lcoupe's Dyno 1994 L KA8AT

Mods:
Intake
2.5 inch Magnaflow Catback with Hiflow cat

Numbers:
179.5 HP
168.2 TQ

 

My opinion is simply this:

Its a great mod for the money, if any other headers come out like this obx with bigger diameters and collectors, they will rein supreme...

~Dv8

The obx y-pipe collector is only 1 7/8" ID so a bigger opening like 2.5" might help him get over 200whp. The test pipe is 2 1/4" ID so there's room for improvement there as well.

 

The obx y-pipe collector is only 1 7/8" ID so a bigger opening like 2.5" might help him get over 200whp. The test pipe is 2 1/4" ID so there's room for improvement there as well.

On a 3.2 auto it may kill TQ to go with a 2.5 Y collector. I would say 2.25 flared to accept a 2.5 straight pipe and 2.5 all that way back.

But yea 200WHP+!

~Dv8

 

Nice!!!Good #s for mods,throw a bottle on that thing.

 

On a 3.2 auto it may kill TQ to go with a 2.5 Y collector. I would say 2.25 flared to accept a 2.5 straight pipe and 2.5 all that way back.

But yea 200WHP+!

~Dv8

I agree, everyone has been harping on bigger and bigger collectors. Yeah, 1 7/8 is a bit small, but anything over 2.25 will be too much.

Fuckin-A!:bootyshak :bootyshak :boink: :boink:

meh, he beat me to it. I have not had time to sit down and look at it. I have been in class and at work all day. I will sit down tonight and compare it to some of the other dynos i have and let you know what i think. Numbers look good though.

 

On a 3.2 auto it may kill TQ to go with a 2.5 Y collector. I would say 2.25 flared to accept a 2.5 straight pipe and 2.5 all that way back.

But yea 200WHP+!

~Dv8

I guess the idea is to ease into 2.5" from 2.25 collector back? to achieve a venturi effect?

 

I guess the idea is to ease into 2.5" from 2.25 collector back? to achieve a venturi effect?

You can acheive a venturi effect, but that is done with the shape of the collector(althought its size is also important based on how much gas is passing through).

 

So I will be losing tq because of the y pipe size?

this was already posted, but i will quote it for you.

On a 3.2 auto it may kill TQ to go with a 2.5 Y collector.

It "kills" low end torque every time you open the exhaust up, and too far will make it sluggish down low. In reality, it simply shifts the torque higher allowing you to make more power up top. it doesnt create much more torque, it just shifts it (look at the dyno graph) If you want a detailed explaination, i can give one.

 

K, and the only way to solve this problem would be to get a whole custom made Y pipe?

Its not a problem, its a fact. This is all exhaust flow mechanics. You should look at what rpm range you would like the car to make power, and use that to adjust the size of your piping to accomplish want you want.

 

Factor in
John's straight pipe too. Thats good for about 2-5WHP.

It feels great doesnt it?

Wow that's amazing considering his 91 coupe is basically a typeII automatic.

That's close to 15-18whp over some of the ones below:

Thai.95LCoupe's Dyno Numbers 95 L KA8 AT

Mods:
Custom Cold Air Intake
Dinan Stage II Chip
Legend Spec. Remus Exhaust

Numbers:
Max Power-182.7 @5300rpm
Max Torque- 168.5 @5300rpm

94Lcoupe's Dyno 1994 L KA8AT

Mods:
Intake
2.5 inch Magnaflow Catback with Hiflow cat

Numbers:
179.5 HP
168.2 TQ

 

you know.. those numbers dont seem too far off from some of the stock g35 dyno numbers.... but depends on which dyno, hp is measured on i guess http://tl.acurazine.com/forums/showthread.php?t=78027

 

you know.. those numbers dont seem too far off from some of the stock g35 dyno numbers.... but depends on which dyno, hp is measured on i guess http://tl.acurazine.com/forums/showthread.php?t=78027

I would say far closer to the TL or CL than the g35.

The g35 or 350z is still way ahead. according to that g35 dyno i have more WHP and WTQ, but then you add a intake to that thing and it blows me away or any Legend for that example.

~Dv8

 

im definitely liking these dyno numbers

 

I would say far closer to the TL or CL than the g35.

The g35 or 350z is still way ahead. according to that g35 dyno i have more WHP and WTQ, but then you add a intake to that thing and it blows me away or any Legend for that example.

~Dv8

then you're just gonna have to shoot up some nitrous:nutkick:

 

...and it blows me away or any Legend for that example.
~Dv8

Yeah, just until you strap the two snails on that we talked about

 

Very nice numbers. Congrats.

 

Nice Numbers. It's nice to see they provide some gains.

I'm just estimating here, trying to figure out where I would be after the headers...

Type I-Weapon R Intake-Greddy Cat. Back Exhaust already on the car.

I would do the headers-y-pipe and hi flow cat. Looking at other dynos from the past, I'm thinking 180-185 WHP if I do nothing else. (Of course that could be improved if I purchased a Stage II chip and Type II intake manifold.) Then I would be close to that 200WHP mark).

Looking at Torque, wouldn't I be about 180 to 185?

This is just me thinking outloud...errrrr...typing.

 

Cold air would help and a chip would def. help. One thing that sucked about my dyno is that I was running 19's. That killed my numbers. I'm pretty sure I would have come close to 190HP/170+ FT/LB's

Man Headers would have been nice....

 

Christian how big is the collector on your headers?

What's going to kill these numbers in the long run is a lack of tuning. If we can't mess around with our air/fuel ratio, we've never going to get optimal gains. I'm sure with proper tuning, blkonblk would have cleared 200whp and gotten around 190tq easily

 

DV8 there is no way in hell i could run less hps than the stock motor. I mean the type 2 should have 200-230hp stock. how could he be running less then 200hps. i think somethings wrong with the dino.

 

DV8 there is no way in hell i could run less hps than the stock motor. I mean the type 2 should have 200-230hp stock. how could he be running less then 200hps. i think somethings wrong with the dino.

is your car brand new?

 

DV8 there is no way in hell i could run less hps than the stock motor. I mean the type 2 should have 200-230hp stock. how could he be running less then 200hps. i think somethings wrong with the dino.

The stock Type II Legend makes 230HP at the crank not at the wheels.

 

yep the HP that dealer gave you when you bought the car that is fly wheel HP and WHP is your actual power come from the wheel and push the car.

 

The stock Type II Legend makes 230HP at the crank not at the wheels.

so what's a completely stock Type II Legend get on a dyno? would it be in the 160's? is there a typical ratio for how far apart the listed HP and WHP are? how much do you normally lose on the way to the wheels...