BMC Racing , A Series Exhaust Flange

[steven]

BMCrace.com now makes header flanges for A series engines.

sorry if tis is a repost.

BMC Racing (http://www.bmcrace.com/index.php)

can make a mean turbo manifold with that thing.

[bobafett]

sexy. :) arron wier of weir racing also has them. dunno his individual price on thiem though

[AccordEpicenter]

i have their very first A series flange on my turbo mani, it was made for me last year. Flange is very high quality. The only bad thing i can say about BMC is that they took a few mos to get it done, even though they had to make it by using my old exhaust manifold flange. Ive seen and used WeirRacings stuff and its excellent too and, but youll have to send him either your old flange or a 1 piece exhaust mani gasket so he can make one for you. Both those guys are pretty good though, and i can reccomend their work, its real good. And yeah, i posted about BMC making them a year ago i think. I didnt know they listed them in their site though... soo i wont yell REEEPOST

[Swap_File]

BMC had stopped making the A series flange for a while, but myself and I think few others emailed them requesting them to start making them again.

I never got a direct response back, but it looks like they got the message. :)

I will have to place an order with them shortly.

[SQ is the SQUAD]

i just ordered my bmc flange tonite. ill let you guy know how long it takes and the quality. if its good ill grab a couple more. i also brough onw of there collector kits

[SQ is the SQUAD]

hasent come yet, ill wait aonther week before i start complaining

[SQ is the SQUAD]

i brought a bunch of supplies from ace stainless, they came in like 3 days form cali to boston. good people

[SQ is the SQUAD]

my flange came today

[SQ is the SQUAD]

this is a very quality piece. i will post pics later when i find my cable. its absolutly flawless, it even looks better than the first flange i had, just took forever to come

[Bglad420]

I just bought a flange from these guys to turbo my 3g, but I havent heard anything back yet, has anybody else ordered from them before??

http://www.bmcrace.com/products/flanges/

[RobT5580]

I have heard of them on other forums like HMT etc but im currently working on having them make up a B20A flange. From what i hear the are reputable but if your concerned just call them. I wouldnt expect problems for you because the flanges are probably off the shelf (left overs).

[gfrg88]

yeah, they took quite some time too with sq. but he did get it....

[Bglad420]

I got ahold of them on Thursday, she said they would be shipping it out this week. No biggie, I was just a little concearned cuz they never responded to my emails, I quess I should have called.:Owned:

[bobafett]

they dont normally stock A20 flanges, so if you were ordering a header flange i was told there can be a 2-3 week wait before the part is even machined. :)

sam at BMC is a good guy, you will get your stuff...

[newaccorddriver]

they dont normally stock A20 flanges, so if you were ordering a header flange i was told there can be a 2-3 week wait before the part is even machined. :)

sam at BMC is a good guy, you will get your stuff...


i emailed them about shipping prices to canada, he told me that if i wanted the collectors, there is probably a 3 week wait, or shipping time for it. he never mentioned anything about the A20 flange though:huh:

[A20A1]

I will order one as soon as Pay Pal diverts the money from my bank.

[A20A1]

I placed my order... 2-3 Weeks later we'll see what happens :)


$46.00 from BMC Racing (http://www.bmcrace.com/index.php)


I updated the link of the first page, the old link was a redirect. Also there is some additional steps to getting the order to be placed correctly so I linked to the first page so you can read those instructions so there will be no problems making the order.

[Bglad420]

46.00??? Mine was 36 shipped. And for that price screw drawing it up and creating tool paths getting stock and cutting it.

[A20A1]

I dunno, blank stock cost my have gone up in price... so they upped the flanges by $10

as long as it's not $50 I'm okay. :)

[Legend_master]

I dunno, blank stock cost my have gone up in price... so they upped the flanges by $10

as long as it's not $50 I'm okay. :)


So are you going turbo, or just building a nice header?

[A20A1]

I need a flange for the F22/F23 Megan Racing header I have to finish the project.

Before I make another totally custom header I want to get a pipe bender, I'm tired of lining up and welding J nd U bends when the majority of the header is straight pipe. Besides straight pipe is a lot cheaper to buy then bends.

[A20A1]

:)
http://i23.photobucket.com/albums/b351/Wendy_girl/BMC_A20A_Flange.jpg

[Legend_master]

:)
http://i23.photobucket.com/albums/b351/Wendy_girl/BMC_A20A_Flange.jpg


Nice, what do you plan to do with it?

[tuxdreamerx]

:)
http://i23.photobucket.com/albums/b351/Wendy_girl/BMC_A20A_Flange.jpg

Sex.....

[epic1400cs]

I am wondering if they can make it in stainless steel rather than mild steel..

[LX-incredible]

^ Same here.

[Ichiban]

Wouldn't it be cheaper to have a local shop with a water jet or a flame cutting table do it? Just bring them a scale picture of the flange, and a $4 piece of flat bar. Drill the holes yourself.

[Hauntd ca3]

Before I make another totally custom header I want to get a pipe bender, I'm tired of lining up and welding J nd U bends when the majority of the header is straight pipe. Besides straight pipe is a lot cheaper to buy then bends.

wouldnt worry bout buying a bender unless its a mandrel bender.
press bends crush the pipe and reduce its diameter to much.
evena really good press bend will reduce cross section by 10/15 %

[A20A1]

I know thats why I'm looking at a draw bender, it's not a crush or a press bender, it's much closer to a mandrel bend.

this is the draw bender I was looking at
http://www.bii1.com/benders/manual-tubing-bender-050.php

maybe not to buy but to lease. :D

.
.
.
. updated link to pipe bender 12/13/2009
.

[AccordEpicenter]

Wouldn't it be cheaper to have a local shop with a water jet or a flame cutting table do it? Just bring them a scale picture of the flange, and a $4 piece of flat bar. Drill the holes yourself.

Have you ever tried to drill holes in 1/2" thick mild steel? Rofl. Dont be a cheap ass, the flange is well worth the money in terms of quality and time savings. If you know a machinist that can cnc machine you one for a case of beer then more power to ya. Most race type manifolds, especially turbo manifolds dont use stainless because they expand more than mild flanges, some say they warp easier also. If you want to bend your own pipes, they def should be mandrel bent, using crush bends will make it flow like complete shit, thats why i like to use bends and cut/weld. Uniform size and good flow throughout, just more time consuming

[epic1400cs]

Most race type manifolds, especially turbo manifolds dont use stainless because they expand more than mild flanges, some say they warp easier also.
Good point - stainless is difficult to manage the heat/warp thats what I thought when was working on welding on stainless.
Of course, steel also expand/contract when heated up but steel is softer compare to stainless. Stainless react like spring.
Having said that, I still like the shine and potential long life stainless gives, well, for street use.

[Ichiban]

Have you ever tried to drill holes in 1/2" thick mild steel? Rofl.

I am a machinist.

And yes, I routinely drill inch-plus holes through 3-4 inch flanges of 4140.

[AccordEpicenter]

well if you have the time and equipment then go for it.

Aaron Weir of Weir technologies has started making turbo and honda flanges as well as a20 exhaust flanges too...

They are 3/8" laser cut and were rather inexpensive at $20 ish.

here is his contact info:

Aaron Weir
Weir Technologies Inc.
Burlington, Ontario.
[email protected]
905-802-4703

[hondaman1986]

this is a very quality piece. i will post pics later when i find my cable. its absolutly flawless, it even looks better than the first flange i had, just took forever to come

about how long did it take to come to you???

[Accordtheory]

Do not buy from bmc. http://www.honda-tech.com/zerothread?id=2190103

[hondaman1986]

Do not buy from bmc. http://www.honda-tech.com/zerothread?id=2190103

to late

[A20A1]

about how long did it take to come to you???

If you look at my post dates it took a month to get my flange made from the time I ordered it.

I read past comments on their slow turn-around but never had a problem as I wasn't in a rush and everyone before me seemed to get their parts eventually.


aparently RCautoworks got his flanges too... also a month later. But there was a lot of grief in the previous pages.
http://www.honda-tech.com/zerothread?id=2190103&page=4


SQ is the SQUAD
Approximate Time of order: 09-13-2006
Approximate Arrival Time: 10-04-2006

A20A1
Approximate Time of order: 02-19-2007
Approximate Arrival Time: 03-16-2007

Remember I live in Hawaii.

[hondaman1986]

has anyone ever used rcautoworks.com?

[A20A1]

so you're getting a BMC flange?

[hondaman1986]

so you're getting a BMC flange?

i am yes but i was also wondering if anyone had used rcautoworks to buy parts like turbos and intercoolers from

[A20A1]

get you flange?

[hondaman1986]

get you flange?

i did i got both of them and it took about a month but i finaly got them now im waiting to put my megasquirt on before i buy stainless and make my mani.

[cygnus x-1]

In a sense, air IS delivered by sound. By definition, sound is a mechanical vibration of a physical medium. Your ears detect sound as a pressure wave that pushes on the parts of your inner ear. You can think of a MAP sensor as a kind of *ear* that detects changes in manifold pressure, or sound. You also hear that sound as the pressure waves travel back through to the entrance to the intake, and also at the exit from the exhaust. When you *tune* an intake or exhaust you are in fact trying to create resonance characteristics that will increase airflow through the engine.

http://en.wikipedia.org/wiki/Helmholtz_resonance

As far as fuel delivery I'm not sure where this fits in the analogy.

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[markmdz89hatch]

oddly enough, I just had this conversation with a local machine shop last weekend. When he started talking about the sound waves, I was like wtf. After a lengthy conversation with the guy, I was semi-convinced he knew what he was talking about.

Mike, btw, this conversation was brought about by the DCOE manifold I brought to him, and once I started asking about how the runner length would affect performance, that's where this conversation came in. So, maybe not specifically carb, but at least intake manifold design was directly influenced by sound travel. As a result, I'm rethinking my plans for the manifold design. (There may be a B-series DCOE TWM manifold up for sale in the next few days pending my design investigation for my specific application.)

[cygnus x-1]

If this is for an A20 you want long runners, just about as long as you can fit. Runner length is determined by what RPM band you want peak power at. Here is a calculator:

http://bgsoflex.com/intakeln.html

The length you put in should be the total intake length from intake valve to where the air first goes into the carb/throttle body inlet. Some good info here too, although it's intended for fuel injection, some of it would apply to carbs as well.

http://www.jenvey.co.uk/

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