Headers

[Anonymous]

Which is exactly whyy they were a bad design.

His were close to equal lengh, but not quite. If my memory serves correctly, his front ones went straight down, slowly angling together. Picture this, but less radical angles:

\ l /
\ l /

The outer two will be slightyl longer than the inner one, not more than a couple inches, but still, enough to make a slight difference. However it would radiate a lot less heat routing under the car, because you have airflow on them constantly, plus the hot air around them is not right by your itnake setup. However I would rather route the front ones around.

[SappySE107]

I posted a link to his pics already, I dont need to imagine anything. HIs were within 1" of being equal length from what I remember. The design wasn't bad, it was the layout for ground clearance. To say his design was bad in terms of our discussion is to imply his headers weren't performance oriented. They were in fact very much setup for performance and not just "what fits'.

[brian89gp]

The center one had that S bend right before the collector, making it longer.

[Anonymous]

The center one had that S bend right before the collector, making it longer.

I remember seeing something like that and wondering what is was for. In which case his headers were a good desing, but it would be more drivable on a daily basis if we just went around. And Bowtiekid's car is alreayd lowered so he has even less room, I am not lowered however. Yet.

[pocket-rocket]

So is the 92, and Ben and I are supposed to be working on headers this winter, which would work out well since the 92 is off the road for the winter and under a car cover, and it's lowered too. Not that this post added anything productive to this thread... I guess we have the advantage having an DOHC out of a car with an auto bolted to it which could prove usefull for both worlds (auto and manual). And if we get them finished soon, I have a friend with an DOHC auto 92 GPSE that I am sure would not mind testing out a set of headers.

[4spdz34]

i also have a dohc motor and a spare auto trans. i just need to get the materials and the welder, so i'm half way there.

[3.4Z24]

http://www.geocities.com/MotorCity/Track/6992/vizard.html

[Anonymous]

My car is in my garage, and everything in the way is gone. My froont manifold and my crossover is out, along with a lot of other things. I'm trying to get the rear manifold out, but it is a bitch. I have to pull the studs out. Even then it will be tricky. The pipe is here, and it is perfect. Just awesome, the bends are flawless, etc. I have made the prototype front header with my flexible pipe, and it is ready to be made with the metal pipe. As for the rear, it will take time because we don't know how exactly we are going to route it. I will have pics soon.

[Anonymous]

Here are some of my dimensions that I am using.

1 5/8" primaries
30" lengh on the primaries(maximize high end power)
Front 3 collect over the tranny into a single 2 1/4" pipe that runs down through the stock downpipe location.
Rear 3 collect in the tunnel into a 2 1/4" pipe(might change)
the 2 X 2 1/4" pipes then collect intoa single 2.5" pipe that goes into my current exhaust.

There will be flanges directly behind the collectors which will enable the headers to be taken off easier. The 2.25" downpipes will be taken off with the 2 into 1 collector via a 2.5" flange right behind the 2-1 collector.

I am using 3/8" copper tubing ans a fexible pipe, it will hold its form well. Then, to gain the desired 1 5/8" diameter, I have a padded tube, like that on bicycles. This works perfect. I could have used 30" sections of flexpipe from AutoZone, for patching, but it was expensive. All fo the copper and padded crap costs 6$ at Home Depot.

They aren't cheap, We have already spent over $800 on both sets. Install is not easy and might require un-bolting the engine and swinging it, but I am not sure. I will try to do mine without engine removal, but who knows. I do know now that I may have to unbolt the mounts in order to get the rear manifold off, it is a big PITA.

[wireman121]

Well, if and when you have an auto set available, if the gains are worth it, I am interested in purchasing them....as I am sure many others will be

[dykz34]

I highly doubt anyone will produce headers for the DOHC. The market sucks and the cost would be too much.

[Anonymous]

The market sucks

I disagree. Compared to a SBC the market sucks, but I believe that by making them for ANY 3.4L, whether it be auto or 5-speed, 91 or 96, there is a sizable market. The topic over at MyMonte.com is HUGELY popular, and my design is better than theirs. I think there is a market, but the cost is very high.

[SappySE107]

Discussions are popular, but paying for a quality set is another thing. Not many are willing to modify their engine bay to fit what works best either, so don't count on building a set for sales. Im solely worried about making a set that is best, not what sells. I can make a set for mass marketing a hell of a lot easier, but what fun is that unless you just wanna make money? Im not rsm, i have some fucking pride.

[Streetrodder83]

Everyone's interested until the cost is factored into the equation. Ease of installation is another big thing, god forbid you actual have to modify something to have them fit, that will turn away people. Those that want headers for their cars bad enough will make their own. Those are the people who are serious about getting performance from their cars.

[Juglenaut]

Compared to a SBC the market sucks, but I believe that by making them for ANY 3.4L, whether it be auto or 5-speed, 91 or 96, there is a sizable market. The topic over at MyMonte.com is HUGELY popular, and my design is better than theirs. I think there is a market, but the cost is very high.

Well if the price out weighs the positive gain then I would rather modify a SBC 305.

Howmuch really would it cost for one person to sit down and crunch the numbers and then imply a sound header system and start building....Well if a person gets paid 30 bucks an hour to put a system together then yeah I would see why it cost so much, but if giving a experience builder machinist can put a set together in no time flat with the specs/numbers would the price be the same?. So again if the price for these headers is some un-godly amount where is the proof of materials/labor cost versus howmuch they would charge