headers options and gains

[Starshooter10]

so,a local buddy of mine has a few mods on his MM (4:10 stainless works -full back, high stall, and tune) definitely pulls on my merc (just flowmasters and jmod)

I"m curious what options are there for headers, and what gains can be expected?

[RubberCtyRauder]

Stainless Works long tube or Kooks mid tube. That's it. With tune 25+rwhp

[03Merc]

I have the same stuff, great mods.


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[the fat bastid]

Stainless Works long tube or Kooks mid tube. That's it. With tune 25+rwhp

I thought that was the other way around? SW were unequal mid length and kooks were equal length long tubes?

[03Merc]

I thought that was the other way around? SW were unequal mid length and kooks were equal length long tubes?



Nope. You're wrong.


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[MyBlackBeasts]

I thought that was the other way around? SW were unequal mid length and kooks were equal length long tubes?


Nope. T'other way around. You'll get more grunt with the long tubes.


See these: https://www.mercurymarauder.net/forums/showthread.php?t=106984

[Joe Walsh]

Actually, I'd still call the Kooks headers long tubes.
The odd thing is that the driver's side collector is parallel to the floorpan, the passenger's side is angled down towards the ground.
I ordered mine with the 'ball & socket' style connections.

https://i.imgur.com/tDJ2PfVh.jpg

[martyo]

If you’re interested in the Stainless Works headers, no one beats my prices. Feel free to message me.

[Starshooter10]

If you’re interested in the Stainless Works headers, no one beats my prices. Feel free to message me.

Still like $1000?

I want to open it up a little, but this is by no means my "fast" vehicle.

honestly I think my F150 is quicker. (3.5eco)

If I wanted to go fast Id take one of the ninjas.

[Starshooter10]

Actually, I'd still call the Kooks headers long tubes.
The odd thing is that the driver's side collector is parallel to the floorpan, the passenger's side is angled down towards the ground.
I ordered mine with the 'ball & socket' style connections.

https://i.imgur.com/tDJ2PfVh.jpg

hubba hubba!

[justbob]

Still like $1000?



I want to open it up a little, but this is by no means my "fast" vehicle.



honestly I think my F150 is quicker. (3.5eco)



If I wanted to go fast Id take one of the jigsters


Fixed. [emoji16]




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[Motorwork]

If you’re interested in the Stainless Works headers, no one beats my prices. Feel free to message me.



Can I quote for a set please shipping to Texas


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[Starshooter10]

Fixed. [emoji16]




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jigster?

Do you mean gisxter AKA GSXR? if so no.... suzuki riders are *FABULOUS*

I'll keep my kwikas****i ninjas :)

[RubberCtyRauder]

Marauder headers are not CA smog approved.

[musclemerc]

Still like $1000?

I want to open it up a little, but this is by no means my "fast" vehicle.

honestly I think my F150 is quicker. (3.5eco)

If I wanted to go fast Id take one of the ninjas.


jigster?

Do you mean gisxter AKA GSXR? if so no.... suzuki riders are *FABULOUS*

I'll keep my kwikas****i ninjas :)

Someone say Ninja?
https://i.imgur.com/efyglPzl.jpg

[Starshooter10]

Marauder headers are not CA smog approved.I despise the strangle hold mosco..... Sacramento has on everything.

There are ways to fly under the radar though.

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[Starshooter10]

Someone say Ninja?

https://i.imgur.com/efyglPzl.jpgZx6/7/12 here.

I love the looks of a 14, yet to ride one... But I did ride a gtr14 and fell in love!

My garage is a lot fun, helps that it's all high Tech and has some Haas.io [emoji3]

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[musclemerc]

The ZX12 must be a blast!
The ZX14R is heavy (600lbs) she handles well in the twisties.

[MyBlackBeasts]

The ZX12 must be a blast!
The ZX14R is heavy (600lbs) she handles well in the twisties.


:Offtopic:


:hijack:


:lol::lol::lol:

[musclemerc]

Guilty as charged....
In my defense the OP said Ninja!

[Starshooter10]

The ZX12 must be a blast!
The ZX14R is heavy (600lbs) she handles well in the twisties.12r is rated at 550 or so curb, full tank.
Mine has a full titanium ackroprovic supposed to save ~30lbs.

*curiously curb weight on the 750 is only 5 lbs lower.... But almost 90hp between them.

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[loud2004marquis]

I"m curious what options are there for headers, and what gains can be expected?

I had Stainless Works headers, cats and full exhaust installed with their turbo chambered mufflers and my increases were: +30HP & +28TQ

[Starshooter10]

I had Stainless Works headers, cats and full exhaust installed with their turbo chambered mufflers and my increases were: +30HP & +28TQWhat other mods did you have to get those gains?

How was the tone and drone?

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[loud2004marquis]

At that time the other things done to the car besides the Stainless Works goodies were: K&N CAI, 4:10 gears, and a 93 octane dyno tune.

There's not much drone and I like the tone with the x-pipe and their chambered (quieter) mufflers. Ended up getting Megs 4" tips welded on.

If you get headers, you should get them ceramic coated as well. They say it keeps under the hood temps lower, ect. If anything it makes them/keeps them looking really nice.

[musclemerc]

most of the 30+HP came from the dyno tune...…
Flame suit on :flamer:

[Starshooter10]

At that time the other things done to the car besides the Stainless Works goodies were: K&N CAI, 4:10 gears, and a 93 octane dyno tune.



There's not much drone and I like the tone with the x-pipe and their chambered (quieter) mufflers. Ended up getting Megs 4" tips welded on.



If you get headers, you should get them ceramic coated as well. They say it keeps under the hood temps lower, ect. If anything it makes them/keeps them looking really nice.Headers x pipe and no resonators.... I imagine it was pretty loud. I like the v8 sound.... But I hate tickets more.

My buddies 03 is pretty loud..
Not just cops looking at him loud... But CA ******** exhaust ticket.

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[Starshooter10]

most of the 30+HP came from the dyno tune...…

Flame suit on :flamer:What does a plain tune give?



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[musclemerc]

^^^^
14~18HP/TQ NA

On a FI car headers are a must. Only then will you see a 30+HP gain

[musclemerc]

Headers x pipe and no resonators.... I imagine it was pretty loud. I like the v8 sound.... But I hate tickets more.

My buddies 03 is pretty loud..
Not just cops looking at him loud... But CA ******** exhaust ticket.

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Your in CA. Neither Kooks or SW are smog certified :violin:

JBA is your only choice! They make a mid length header with a bolt on X pipe that can be modified to fit a MM.

[Starshooter10]

^^^^
14~18HP/TQ NA

On a FI car headers are a must. Only then will you see a 30+HP gainInteresting....

Best bang for the buck?
I use mine as a high speed cruiser, trying to avoid gears, got the jmod 15k back when I rebuilt the trans.

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[Starshooter10]

Your in CA. Neither Kooks or SW are smog certified :violin:



JBA is your only choice! They make a mid length header with a bolt on X pipe that can be modified to fit a MM.JBA?

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[RubberCtyRauder]

Tune is best bang for buck, changes the stock shifting from always up shifting and down shifting. Keeps car in power band better

[musclemerc]

JBA?

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Yep,,, only company offering carb cert. for 4v engines

[MyBlackBeasts]

JBA?

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http://www.jbaheaders.com/

[VMARAUDER]

I dynoed at 277 rwhp with tune, Stainless Works full exhaust and 4:10 gears on a stock Motor which I understand is the norm
What is the rwhp of a stock Marauder?

[musclemerc]

Stock is about 242hp/261tq

[offroadkarter]

I dynoed at 277 rwhp with tune, Stainless Works full exhaust and 4:10 gears on a stock Motor which I understand is the norm
What is the rwhp of a stock Marauder?

I dynoed about 272 with a JLT, SW LT's + factory exhaust, and a canned lidio tune. I guess my numbers weren't as bad as some Marauder friends had led me to believe if you got 277 with a full exhaust.

My car ran a 13.9 NA on street tires with the mods listed above + 4.10 gears.

The black car does not have 4.10's but it does have a full SW exhaust, I'd like to see if it can also crack a 13.9 in cool weather.

To the OP: SW headers are absolutely worth it. Better fitment/flow over the kooks, easier access to the starter as well. Kooks also had a problem back in the day with cracking at the primaries (same with the OBX knock off of kooks). This happened to a friend of mine with kooks on his 04 Sport. Back in the day people bought the Kooks because it was the only option, when SW came along it's been all anyone buys.

The way my black car is setup now is how these cars should have come stock (realistically speaking), it would have been respectable performance for a car it's size in 2003.

[decipha]

Those dyno numbers seem extremely high to me.

My stock 03 put down 217 stock and 229 with a tune but has 254k miles.
My friend craigs 03 put down 228 with a tune he only has 35k miles on his.

heres an old link where others were in the ballpark as well
https://forums.corral.net/forums/svt-dohc/270904-marauder-makes-228-rwhp-wtf.html

if any of you are ever in your marauder around the new orleans area come stop by my shop and get a free dyno pull to verify. I'm curious to see.

[musclemerc]

That's way too low, stock should lay down 242hp

[Starshooter10]

That's way too low, stock should lay down 242hpHe mentioned he's in new Orleans. It's pretty humid down there... It is at sea level though.


Of course there are many many more factors... In my area (SF bay) we are cool and at sea level... But the idiots in Sacramento mandate we mix our gas with 10% corn juice. That'll affect things too.

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[musclemerc]

Dynos have parameters to adjust for humidity and elevation.