OBX Stainless Header Install
Burning Brakes
Joined: May 2010
Posts: 840
Likes: 4
From: High Point NC
Do they have the smog stuff on them? I'm thinking about getting a set for my L98 but all the ones on that auction site have smog tubes which I don't need. Just curious if they offer a no-smog option
Thread Starter
Pro
Joined: Aug 2009
Posts: 725
Likes: 4
From: Plano, TX
Update: After doing some tuning on the car there is new found power in all rpm ranges. Top end has a dramatic increase in power. Keep in mind that I went from factory manifolds and cats to long tubes and straight through bullet cats. For tuning purposes I had to add fuel at the upper rpms. This tells me that air flow through the motor(Volumetric Efficiency) has increased.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Just a note, I found that 1" stainless allen, socket head, header bolts are much easier to use rather than 6 or 12 point header bolts. Using a torque wrench is even easier even on ole #8.
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Instructor
Joined: Aug 2007
Posts: 176
Likes: 0
From: Auburn MA
This looks great.. even though they are smaller primaries I think I would still see some good results with my Hot Cam.
Thanks for being a guinea pig and trying these out. They look pretty good !! Looks like I'll be saving my pennies
Thanks for being a guinea pig and trying these out. They look pretty good !! Looks like I'll be saving my pennies
Pro
Joined: Jan 2007
Posts: 584
Likes: 2
From: Gilroy Ca.
Years ago I built custom headers for a Lamborgini speed shop. We had a computer program design that would tell me what size to make for the specific engine. It asked cubic inch, rpm and type of fuel. This progarm was designed by the late Jim Fueling, from Southern California. He is the one who designed the 3 valve head for the Ford Triton Engine.
Any way, his theory was to make the first part of the header pipe smaller to accelerate the hot gasses beyond the speed of sound for better scavenging. He then added an anti revesion chamber and then on to the collector. This method is use by some Nascar teams such as Robert Yates.
Bigger is not alway better, but design is.
Any way, his theory was to make the first part of the header pipe smaller to accelerate the hot gasses beyond the speed of sound for better scavenging. He then added an anti revesion chamber and then on to the collector. This method is use by some Nascar teams such as Robert Yates.
Bigger is not alway better, but design is.
Pro
Joined: Jan 2007
Posts: 584
Likes: 2
From: Gilroy Ca.
I just put a set of 1 5/8" shorties on my 383 and jump from 342RWHP to 366 RWHP. The new tune had to increase my af to 12.7.
I was told it was a waist of time but I am happy.
. Nice increase for little money and Cal. legal.
Mine are not OBX. I am not here to steel the thread. Just saying 1 5/8" will work.
My cnc heads flow: AFR heads flow:
Int. at .600"= 276 w/1.94" Int. at .600= 262
Exh.at .600"= 182 W/1.5" Exh.at .600= 194
Just to compare with what ever size heads you have.
I was told it was a waist of time but I am happy.
. Nice increase for little money and Cal. legal.Mine are not OBX. I am not here to steel the thread. Just saying 1 5/8" will work.
My cnc heads flow: AFR heads flow:
Int. at .600"= 276 w/1.94" Int. at .600= 262
Exh.at .600"= 182 W/1.5" Exh.at .600= 194
Just to compare with what ever size heads you have.
Advanced
Joined: May 2006
Posts: 70
Likes: 1
From: Lake Orion Michigan
93VettePilot, thank you for this informative writeup. I purchased a set, probably from the same seller, for a best-offer price of $450 (+ $45 shipping). I also kept the stock exhaust from the resonator back. The sound is now much more throaty and it is much louder at WOT - I love it. This is without a doubt the best bang for the buck mod I have made. I took the car to the track today and was amazed at the improved performance. My previous best 1/4 mile time was 13.824 @ 99.59 MPH. With no other changes but the headers, today I ran a new best of 13.399 @ 103.70 MPH. That's a serious horsepower increase for an investment of $495. Thanks again!
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Burning Brakes
Joined: Sep 2008
Posts: 810
Likes: 58
From: Alva Florida
One quick question...I'm curious as to how it effects under hood temps compared to ceramic coated headers...Anybody know the answer to that?
Stainless vs. Ceramic coated.
I've got a set of cheap hedmens on my '86 driver and a set of TPIS ceramic coated and there is a big difference...So I'm curious....
Stainless vs. Ceramic coated.
I've got a set of cheap hedmens on my '86 driver and a set of TPIS ceramic coated and there is a big difference...So I'm curious....
Instructor
Joined: Jul 2011
Posts: 241
Likes: 3
From: Tampa FL
I know this is an older post. But are the OBX headers still decent. right now they have name your price on fleabay. Just wanting to make sure. Is this a project a novice could tackle or should this be done by a pro?
