Header i made

[lohatch]

hey guys i posted this over on sohchonda.com but some of you might not venture over there so i thought i would share it here as well. i just finished mocking this up yesterday and took it over to my buddies house to make sure it would fit in the engine bay, since i mocked it on a motor on a stand. everything fits very well and i will be able to retain power steering with it. unfortunetely it is winter here in MN and i have my car put away and the motor ripped out, so it will be a few months before i can dyno it and see what kind of numbers it makes.
1 5/8" piping, 27 inch primaries, equal length, true merge, 2.5" exit. will be going on a fairly modified engine so hoping it makes power.
http://tinypic.com/157lsn
http://tinypic.com/157m36
http://tinypic.com/157m75

[Honda4VW]

Very nice work and design. Hope you welds hold up good!

[infinatenexus]

thats quite impressive

[GREENmeansGO]

good lookin header!!!!how much you got into it?

[97HatchDXStockr]

Who do you recomend going to for dyno time, Im guessing your in the twin cities area?

[guest]

Great job.

[DOG]

Nice work! Want to meake one for me?lol.

[vtecnitrocrx]

did you take any step by step pics when constructing it? What method did you use to mock it up...flex pipe or what? Also, like someone asked above...how much you got into it? Did you use a mandrel bender or did you just cut prebent U's?

[modsHXcivi]

look nice good job

[mynameistin]

power to ya buddie...wish i could fab one up ;)

[lohatch]

hey guys
i did not take any pictures doing the mock up process. i dont personally have a digital camera so i used my buddies when i was at his house. it is constructed of mild steel, so that kept cost down some on this unit. i am an automotive engineering major at MSU mankato and have free access to the dyno at school. i recently got my business license and started Red District Racing Products and i distribute many aftermarket honda racing parts, but i would like to get heavily into fabrication of headers, manifolds, cages, etc. right now i am just focusing on the building of our race car for the upcoming season. we will be campaigning the IMPORT WARS QUICK 16 class and trying to make it to a few BOTI events. so im just trying to get things off the ground a little, get my degree, and build some quality parts and test the hell out of them before i sell anything to anybody. i realize money is hard to come by, so when i sell products i want them to be top-notch and proven. i didnt create this thread in an attempt to sell product i was just pumped about mocking this up and wanted to share it with you guys. i am honored that it got stickied and i will keep you guys posted. have a great day=)

[minimesleeper]

congrats on your accomplishment. hope all works out very well when goin to the dyno then. keep us updated.

[vtecnitrocrx]

Good response man...you just forgot a couple. What did you use to mock it up..flex pipe or some type of tubing or what? Did you use a pipe bender or cut pre-bent U's? What do you think your final cost was?

[streetforce]

really nice job man :)

[lohatch]

i started with runner #4 and just went from there. i dont have a mandrel bender so i bought 180 degree bends and cut them where i wanted/needed. i probably have about $130 in materials without welding/grinding materials and equipment, and that is for mild steel products. i will have over 40 hrs into it by the time i'm done i am sure.

[ryan89crx]

holy shit!! that is fucking amazing!! i ilke it a lot, cant wait to see the dyno results.

[zeus zore]

how about the welding "spikes" inside..think about the flow

[vtecnitrocrx]

RYAN....DUDE YOU READ MY MIND!!! That pic you had made that bitches ass look real terrible..no offense....that pic you got there is the hotness!

[greddytunedhatch]

I guess I'll sound stupid, but isn't that header a little long with a lot of bends? I know a couple of guys that own/race a car, and their exhaust had smaller bends and went straight out the side of the front bumper. It seems to me that that header has to many bends to be as affective as you'd want a race car to be. I'm just curious to know how you came up with that design. Let me know...

Looks mean tho!

[cryz2]

nice job mate

[vtecnitrocrx]

27" primaries aren't long

[lohatch]

I guess I'll sound stupid, but isn't that header a little long with a lot of bends? I know a couple of guys that own/race a car, and their exhaust had smaller bends and went straight out the side of the front bumper. It seems to me that that header has to many bends to be as affective as you'd want a race car to be. I'm just curious to know how you came up with that design. Let me know...

Looks mean tho!

here is a little reading from www.bisimoto.com

bisi states, "My experimentation with fluid dynamic concepts of "flow in pipes" proves that you can achieve the same flowrate and fluid friction in a given straight pipe in one of specified bends if sized properly. In simple terms, a smaller stright pipe flows the same (and experiences the same friction losses) as a calculated "bent" one of larger diameter. There is plenty of scientific documentation on this subject as well. Hence, this concept is one I use on my own race car to generate ideal HP and torque numbers, with a very simplistic setup: simple carbs, a SOHC, and ignition!"

his production header uses approx. 26" primaries with 1 5/8" piping and seems to do very well. this as well as other research lead me to shoot for the upper 2x" area for this unit, and i when i get my motor in i find out how it performs. i will also be running Mikuni PHH44's with a TWM intake manifold on this motor.

[ryan89crx]

how long did you research before doing any fabrication?

[lohatch]

i have had the piping for about 5 months, finally figured i had enough info to know what i wanted to shoot for, so i started cutting. i also finally had a little stretch of time where i could get to work on it, since it was about 0 degress here lastweek, without the windchill factor.

[vtece-hatch]

you did a hella good job on the header!!! wish i could make something that presicely. rep for you bro :TU:

[vtecnitrocrx]

I have seen custom fabbed headers on competitive cars with primaries as long as 31".

[skittyscott]

sick job. rep for you man!

[shottycrxgirl]

wowwweee. thats nice. good job! :-)

[b20vtec]

nice header, have you thought about using stepped primaries?

[D15B]

http://www.d-series.org/forums/image.php?u=863&dateline=1104273944

hey isn't that my previous avatar?? btw great header..can't wait to see results.
fits most applications?

[Jason@Rage]

Great job -- alot of time in that header, nice work.

[lohatch]

nice header, have you thought about using stepped primaries?

yah i thought about it but decided not to do it on this header. also this will fit 92-95 chassis i know, because that is what i built it for, but i dont know about EF or EK chassis. im thinking EK probably wouldnt be a problem, but EF's seem to be a tighter squeeze.

[MyblkVTEC]

I love it!!! nice

[greddytunedhatch]

hey isn't that my previous avatar?? btw great header..can't wait to see results.
fits most applications?
I have no idea?? I got a couple more pics of her, I'll change it if you wish...

Thanks for the info Lohatch. I'll be very interested in seeing the numbers! Do you have a stock header you can use as a control (with the same engine)? That would be a great comparison.

[lohatch]

yah i have a stock header and i also have a chikara header.

[cxjon]

see pat, i told you that people would like it

[OniFactor]

are you gonna fab these for sale, eventually? depending on price, that'd be damn nice to have.

[S Q A D]

^ its a good looking header .....
and if it performs then even more of a reason to like it .... :TU:






Great job -- alot of time in that header, nice work.

^^ if this guy praises your work then you know its good ... Jason is the D-series header king ;)

[OniFactor]

i'd pay a good 220 or so, to have one, welded just as it is, not even nice and shiney, lol. and we all know how much power the bling gets you :-P

[lohatch]

eventually i might get into header production, but i dont know if it would use this same design or something different. this one is just kinda one-off for my car. i bet i have over 30 hours just in mocking it up to the point you see it in the pictures. so if i sold one for $220, after the $130 for the mild steel materials, i would be working for about $3 per hour. handmade headers arent cheap. here is something jason posted over on HT about ANR headers(there was a conversation about some cracking issues they had back in the day)

Here's the deal - this cracking situation is 95% due to installation and usage. Meaning the way the end user installs it and says they are going to use it vs. the way they really intend to. An-R has no cracking problem - but they are always trying to step up to what ever demands this and other sites like it put's on them at any giving time - example.

I dont hear mush crying about the DC header cracking situation......DC is and has been one of the biggest Header makers ( import ) is the past 10 or so years. I can tell you we get atleast 2 headers a week at my shop that have cracks between the flange and runners........DC has an anwser sorry, or send it in and we can see what caused it. But that's ok because it's DC - And let's not even get on other part makers or hell shop's

Everyone wants a "race header" a "race car part" and "whatever makes the mostp power" but for the cheapest price.

If you have ever made a turbo manifold or header -- it's not the material cost that makes a 1 off header 600+ dollars, it's the time/design/testing/advertizing that you are paying for. Hell at 600 it is dame near too cheap...

If you want a race part make sure you know what that is, if you want a street price get something that is made overseas @ 1000pc at a time....see what they do for you when it cracks. The people that make parts are the best until someone copies it for 10.oo less.

As for fixing the cracking issue - it is fixed with mounting your custom header to you custom car and swap ( honda factory has 2 as well as a flexpipe ) also installing the header the way it was designed and explained buy the company you buy it from ( if the company cant answer your questions call another one ) and coating a header will allow it to last instead of rust ( but then the cost to make it will go up / so will retail cost so understand )

Jason Whitfield

some good reading right there. over a year ago i was looking into doing an all motor sohc build and i was doing a lot of reading and the bisi header looked like it would be a nice peice to have, but i was like damn $560. to me at the time that was a HUGE investment for a couple HP, and i never did buy one. i ended up running a turbo setup instead. but now i completely understand and appreciate the price of handmade parts. if you want top of the line stuff, expect to pay top of the line prices. thanks for all the replies guys, it is good to see :)

[vtecnitrocrx]

He really just offered 220............bwahahahahahahahahahahaha...cmon man, what are you thinkin!

[OniFactor]

i said atleast, and, i figured, once you have the first one done, and produce it, you'd have a jig set up, so that it'd take you 10 hours max, to make a header. hey! here's an idea. why not make a DIY kit for a race style header like this?

[steve98ex]

thats impressive :TU:

[vtecnitrocrx]

ONIFactor...it really doesn't come down to whether he has a jig or he doesn't. After materials, like he said, he may be looking at 100 bucks profit. This really doesn't come down to timed labor, it comes down to the skill, materials, and tooling capable of producing it, and that has a fair market value which is much more than 200 or even 400 for that matter.

[z1 master]

Looks pretty nice man. hope it works as good as it looks.

[cf-hb]

So how much extra power you making, sorry don't feel like reading everything

[lohatch]

there is about a foot of snow on the ground here right now and my car doesnt have a motor in it, but when spring rolls around i will let you all know. i hope it makes gains of 8-10 through the powerband, not just peak power. i will have to wait and see though. i will probably dyno it against a 4-2-1 chikara peice or i also have a stock manifold as well.

[90civicdx]

good job love the craftyness. r u thinking about fabbing them and making some money. might be interested in getting a set made

[lohatch]

i dont really have much time right now to go into production. i am an Auto Engineering Major and i need to finish my degree. it made it up to about 31 degrees today, so maybe before long the snow will melt and i will have this badboy strapped on the dyno.

[E. Jeezy]

I want one and I'd be willing to pay a good 500 for it! Its good to see people putting in extra time for tuning. Its not a normal thing nowadays. Most guys just wanna slap on some parts and go. :TU: to you lohatch.

[ryan89crx]

this thread is getting close to 4 years old :roll:

[f00ker]

this thread is getting close to 4 years old :roll:


BAN HIM!

& lock the thread