1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Looking for R+D testers for Defined Auto promo headers

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Old 12-29-10, 12:30 AM
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Looking for R+D testers for Defined Auto promo headers

We originally had 10 spots open for this deal, now there is 7 left. Everyone will be considered for the program. Just post on this thread or send me a PM if you are interested. 12a, 13b 6-port, 13b 4-port, 13b full P-port, Bridge port, ALL types will be considered to join in R+D development.

The deal- Testers will purchase a Defined Autoworks prototype header that is built specifically for their engine setup and car. Cost will be a very discounted price. If no extra power is found vs. the existing header, tester can return for a full refund!
All headers carry a 1 year warranty.

What we need- Car must be using some type of programable ecu. so that the user has control over Air fuel, and timing. OR a carburetor and distributer that can be tuned. The tester agrees to visit a dyno before and after new header install. The tester also must have knowledge of how to tune the vehicle, or has access to a tuner. Once the results are found, the user agrees to publish the results on forums.

Pricing will vary from $480-580 depending on the application. Regular price is $750-800 so this is a heavy discount. We MAY also give a "sponsorship deal" if our decals are applied to the car, and the vehicle participates in some form of racing.

Old 12-29-10, 12:42 AM
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Have RX-7, will restore


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where in Ohio are you located?
Old 12-29-10, 12:50 AM
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nice and all but its gonna be pretty hard to sell since most RX-7 owners are bunch of cheap asses, imho
Old 12-29-10, 01:12 AM
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hey hey easy there wacky lol

My thing would be paying roughly $500 to be a guinia pig
Old 12-29-10, 06:47 AM
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^ agreed
Old 12-29-10, 01:31 PM
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Sounds like one of those commercials that offers "free trial" for the first xxx people that call.

Seriously thou, that's a lot of money for just a header even at the discount. Are they ceramic coated?
Old 12-29-10, 01:36 PM
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Dam, Read some specs on these bad boys a lill while ago. If i had my Fuel injection in right now id probly look into gettin one. But as thats still a ways off oh well
Old 12-29-10, 04:11 PM
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Originally Posted by 13x
hey hey easy there wacky lol

My thing would be paying roughly $500 to be a guinia pig
Its not being a guinea pig if the product has already been proven. This is not a new idea that we have, these headers have been developed for over 3 years The design is holding the current highest document n/a street port 13b, street port 20b, and semi p-port 20b. We would not offer a full money back guarantee if I thought each one wouldn't produce more power than any other header on the market.

This a two year old dyno chart of our 13b first gen street port.




Originally Posted by KansasCityREPU
Sounds like one of those commercials that offers "free trial" for the first xxx people that call.

Seriously thou, that's a lot of money for just a header even at the discount. Are they ceramic coated?
They are not ceramic coated, we use 321 grade stainless steel which is MUCH more expensive. Everyone uses 304 or lower. 321 is designed for ultra high heat, and retains it better than other forms of stainless. Our header is fully TIG welded, and uses more material than the average bear.
Old 12-29-10, 05:26 PM
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Originally Posted by WackyRicer
nice and all but its gonna be pretty hard to sell since most RX-7 owners are bunch of cheap asses, imho
+1. Thats probably the reason why we don't have too much aftermarket support
Old 12-29-10, 06:50 PM
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I'm 95% sure that I'm taking the plunge on this
Old 12-29-10, 07:00 PM
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Originally Posted by GtoRx7.
Its not being a guinea pig if the product has already been proven. This is not a new idea that we have, these headers have been developed for over 3 years The design is holding the current highest document n/a street port 13b, street port 20b, and semi p-port 20b. We would not offer a full money back guarantee if I thought each one wouldn't produce more power than any other header on the market.
don't take me wrong it's just the OS was assuming everyone was familiar with the product. Now you are giving bits of info for people to make a semi-educated decision with
Old 12-29-10, 07:06 PM
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Originally Posted by dj55b
I'm 95% sure that I'm taking the plunge on this
i'm seriously considering it too
Old 12-29-10, 08:20 PM
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Originally Posted by 13x
don't take me wrong it's just the OS was assuming everyone was familiar with the product. Now you are giving bits of info for people to make a semi-educated decision with
Ya, sorry man. We just made a mistake at our approach with the advertising. Here is more info to look at. These are two different threads, the first is the leap from 206 to 216, the second is from 216 to 230. This particular car started as your run of the mill(mods wise, and just a street port) 185whp using a rb header. These threads are the R&D documentation threads.


https://www.rx7club.com/naturally-aspirated-performance-forum-220/216rwhp-streetport-13bre-sure-did-take-while-801325/

https://www.rx7club.com/naturally-aspirated-performance-forum-220/make-230rwhp-streetport-13bre-n-818133/
Old 12-29-10, 08:27 PM
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Old 12-29-10, 09:51 PM
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More examples. These are 3-rotor versions of what you will get(custom to each application). The original 2 rotor header developed these headers.












Old 12-30-10, 10:36 AM
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Not criticizing, just asking:
1) These look heavy; what's the weight on the 12A header?
2) What's the wall thickness on the tubing?
These other questions on second glance seem to only refer to the 3-rotor, but IMWK:
3) Considering the shape with the extra curves, can they still be installed without having to pull (or demount and lift-in-place) the engine?
4) Looks like you absorb a lot of your extra length by going back and forth under the transmission. How much more heat are you transferring to the trans?
5) How much ground clearance (if any) is lost?
Old 12-30-10, 12:28 PM
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Originally Posted by DivinDriver
Not criticizing, just asking:
1) These look heavy; what's the weight on the 12A header?
2) What's the wall thickness on the tubing?
These other questions on second glance seem to only refer to the 3-rotor, but IMWK:
3) Considering the shape with the extra curves, can they still be installed without having to pull (or demount and lift-in-place) the engine?
4) Looks like you absorb a lot of your extra length by going back and forth under the transmission. How much more heat are you transferring to the trans?
5) How much ground clearance (if any) is lost?
1) They are very light. The flange is a RB lightened stainless as well. I would have to weigh one to get a exact weight, but the two rotor should be in the 10-12lb range.

2) Wall thickness is .060" or 1/16th

3) You are looking more at the 3 rotor headers, which have alot of bends. Both however can be installed and re-installed without moving the engine

4) This is also only a 3 rotor thing. To allow room for a large third muffler under the chassis. A three rotor is so much louder, I designed this in mind.

5) No ground clearance is lost on the 3 rotor header, and its the only one that travels under the transmission. The 2 rotor does not bend this way. Its simple with one bend at the engine.
Old 01-01-11, 09:45 AM
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I would be all over these if I hadn't already gone turbo. Been following the 230 hp thread for a while and it's a damn viable option.
Old 01-01-11, 09:53 AM
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If you develop for the 13b-msp let me know. pm me/
Old 01-02-11, 08:10 PM
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I would be, but i cant imagine it being any better than my ISC setup.
Old 01-04-11, 08:07 PM
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Originally Posted by Hyper4mance2k
I would be, but i cant imagine it being any better than my ISC setup.
Can you give me the details on your current engine setup? I have a idea bouncing around in my head that would possibly appeal to you.


Originally Posted by Chad D.
If you develop for the 13b-msp let me know. pm me/
I will send you a PM for sure
Old 01-07-11, 12:32 AM
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Here are some pics of our hand built collector that is on each of our headers sold. This version is for a 12a, 13b is similar just slightly larger throat diameter. I think this helps convey the differences of our collectors vs. any other header available.




Old 01-07-11, 12:51 AM
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looks like a nice clean piece would be great for if i wanted to start over with my exhaust system..
Old 01-07-11, 01:53 PM
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Is this going to be the one for me ?
Old 01-09-11, 12:37 PM
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Originally Posted by dj55b
Is this going to be the one for me ?
Yes sir it is


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