Boost Brothers Header
10-20-2009, 09:10 PM
#77
is adjusting valve lash
Join Date: Sep 2007
Location: hollywooood!
Posts: 1,060
Likes: 0
Received 0 Likes
on
0 Posts
the fact is, all headers provide a difference. and the fact that dyno requests, tuning, and HP gains arise puzzles me.
a bunch of other names such as RB, amemiya, OBX made itself on here just means they are being compared to each other... and they aren't even of the same design! this means they are gonna provide different characteristics...
there are SO many approach to designing a header, its really up to the end user to try to understand some black magic behind the tuning to utilize that part.
and the fact is that someone praised liking OBX may just prove that unequal-lengthed ( can also use different pipe diameters) headers and using that headers in the upper rev ranges like that header is designed to do... and it seems like the intentions of the amemiya headers that it is copied off of if it was.
none of this RB, OBX, amemiya nonesense. this unit (to me, but i can be wrong from a trained exhaust tuners eye). lets compare this unit to another similar design... this seems like its built characteristics is to bump up some TQ in the rev-ranges. so being asked to provide HP dyno gains is like asking a trick question...as there may be none, but a more flatter TQ curve.
i can only assume this... but compare the copy off of the original if u can dig up a dyno graph if they have dyno tested it. look for changes on the graph, and accept it. thats the characteristic they tuned for, and you're merely buying the replicated product of the original made by B+ student.
ericmeyer: if u see this...do u have enough background to be able to judge this header by design, or to see if i'm off on the description?
10-20-2009, 09:21 PM
#78
is adjusting valve lash
Join Date: Sep 2007
Location: hollywooood!
Posts: 1,060
Likes: 0
Received 0 Likes
on
0 Posts
You are correct NYC. The more gradual the transition the higher power you'll see. The collector is BY FAR the cost driver in a longer 3-into-1 exhaust. We have built 11 different header styles and found that NOT mating to the stock exhaust location gives you more power. Out cheapest collector was about $300 in s.s. and our craziest one was $800 (just for the collector).
And yes, there is power to be had in a proper header.
Proper header = $1,500. Proper header + exhaust = $2K+
Watch your A/F values and add a fuel pressure gauge when testing. You will learn a lot by following this method. No need for EGT's if you have a solid O2 sensor. Start with a new one.
And yes, there is power to be had in a proper header.
Proper header = $1,500. Proper header + exhaust = $2K+
Watch your A/F values and add a fuel pressure gauge when testing. You will learn a lot by following this method. No need for EGT's if you have a solid O2 sensor. Start with a new one.
brand names aside, what characteristic do you see out of a header of this design? and at the rpms they happen at?
just had a feeling u may be able to tell more than i do... since u had tried 11 of them. this must at least be similar to one of them...
10-20-2009, 09:24 PM
#79
i believe eric meyer would recommend these headers. 
http://www.petesspeedandfab.com/Home.html
these were developed far and away ahead of the RB ones. and if you notice, the RB ones use a very similar collector. if i didnt know better, i would say RB contacted them for some help. or they had a bit of industry "inspiration."
these are street headers. what i dont get is that eric meyer mentioned he (and pete) have developed race headers and that they were louder. how can one header be louder than another if you take shielding (like the oem) out of the equation.
http://www.petesspeedandfab.com/Home.html
these were developed far and away ahead of the RB ones. and if you notice, the RB ones use a very similar collector. if i didnt know better, i would say RB contacted them for some help. or they had a bit of industry "inspiration."
these are street headers. what i dont get is that eric meyer mentioned he (and pete) have developed race headers and that they were louder. how can one header be louder than another if you take shielding (like the oem) out of the equation.
Last edited by kersh4w; 10-20-2009 at 09:33 PM.
10-21-2009, 12:16 AM
#80
is adjusting valve lash
Join Date: Sep 2007
Location: hollywooood!
Posts: 1,060
Likes: 0
Received 0 Likes
on
0 Posts
^^nice find kersh
the 1st and 3rd primary are reversed in location to the BB unit(doubt it affects much).
eric's and RB's both look like merge-type collector... its kinda tricky as eric's unit seems like a "stepped" primary unit merging to the collector. which appears to be another trick up the sleeves.
16 HP is a big claim, but seeing that air injection delete is incorporated into header design by eric, it may be save to assume there's no CAT in place either...during the design for its intended use.
a grand-am fabricator... doubt he builds much of anything "street" don't you agree?
i agree its one bad-*** header though =)
just not one for me...on a daily basis.
the 1st and 3rd primary are reversed in location to the BB unit(doubt it affects much).
eric's and RB's both look like merge-type collector... its kinda tricky as eric's unit seems like a "stepped" primary unit merging to the collector. which appears to be another trick up the sleeves.
16 HP is a big claim, but seeing that air injection delete is incorporated into header design by eric, it may be save to assume there's no CAT in place either...during the design for its intended use.
a grand-am fabricator... doubt he builds much of anything "street" don't you agree?
i agree its one bad-*** header though =)
just not one for me...on a daily basis.
Last edited by TrochoidMagic; 10-21-2009 at 12:43 AM.
10-21-2009, 07:35 AM
#84
Registered
i believe eric meyer would recommend these headers.
http://www.petesspeedandfab.com/Home.html
these were developed far and away ahead of the RB ones. and if you notice, the RB ones use a very similar collector. if i didnt know better, i would say RB contacted them for some help. or they had a bit of industry "inspiration."
these are street headers. what i dont get is that eric meyer mentioned he (and pete) have developed race headers and that they were louder. how can one header be louder than another if you take shielding (like the oem) out of the equation.
http://www.petesspeedandfab.com/Home.html
these were developed far and away ahead of the RB ones. and if you notice, the RB ones use a very similar collector. if i didnt know better, i would say RB contacted them for some help. or they had a bit of industry "inspiration."
these are street headers. what i dont get is that eric meyer mentioned he (and pete) have developed race headers and that they were louder. how can one header be louder than another if you take shielding (like the oem) out of the equation.
This shorty style collector is very inexpensive to buy because it is very inexpensive to make.
We found a better power curve when we transitioned from the 3 primary tubes over a LOONGER length and then back to 3, 3.5 and even 4" exhaust widths.
Go here and learn: http://www.spdexhaust.com/index.html
10-21-2009, 11:33 AM
#85
Eric probably has more exhaust specific knowledge and data that anyone I know--listen to him. he is the man on this(and other stuff) and he is a rare breed of guy in the fact that he will share the information that he can. It will save a lot of people a lot of work and failed expectations.
Interesting link Eric--picture on top of the custom fab page looks familar? Not your car.
You know years ago i was debating an expansion chamber type design but people took it wrong--i wasnt thinking of the port exhaust timing stuff--just interested in increasing flow, seems I may have been on the right line of thought. wish i had not given up on it.
megaphone stuff--like the old 32 ford header side pipes --in a way? Cool.
OD
Interesting link Eric--picture on top of the custom fab page looks familar? Not your car.
You know years ago i was debating an expansion chamber type design but people took it wrong--i wasnt thinking of the port exhaust timing stuff--just interested in increasing flow, seems I may have been on the right line of thought. wish i had not given up on it.
megaphone stuff--like the old 32 ford header side pipes --in a way? Cool.
OD
10-22-2009, 03:11 PM
#90
We found a better power curve when we transitioned from the 3 primary tubes over a LOONGER length and then back to 3, 3.5 and even 4" exhaust widths.
Go here and learn: http://www.spdexhaust.com/index.html
Go here and learn: http://www.spdexhaust.com/index.html
10-23-2009, 08:39 AM
#91
Registered
Yep.....and the longer and more gradual (sp?) the collector the quantum increase in price due to intricate labor effort required to fab those suckers.
I'll take some pics and post. Our cheapest collector (not the one that mates to the stock cat location) was more than the headers in the market place today-----and that's just THE COST (jobber cost).
Therefore, I would conclude that the header resellers/fabricators in today's marketplace started with a price point that the market could afford and then work backwards.
We started with "what makes the most power" and through the cost out the window.
Big differences in the approach to product development.
The other idea is that nobody tests (and this probably has some merit) and everyone says "I can make that too but I'll tweak it here and there". For the most part the ones are the market are all the freakin' same. They might have a 10-20% performance variance and that equals what?? 1 or 2 hp at the most?
Get the idear fellas?
10-25-2009, 12:08 AM
#92
Registered User
Join Date: Mar 2009
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
i have the boost brother headers on my rx8 and they are just perfect they needed a little of work for fitment but for the price and the gain f power is worth it racig beat they are really good but between the boost brotehr and racing beat i will go with boost brother they are cheap and as good as the racing beat so i will say buy boost brother, as load they are pretty decent i have cat back from mazdaspeed and my car sound really nice my friends and people with other rx8 they say that my car sound better than any other now i still have my cat i will delete the cat by next weekend i will tell you guys how it go .
10-26-2009, 07:34 AM
#95
Registered
iTrader: (1)
Join Date: Jan 2009
Location: Wilmington, DE
Posts: 147
Likes: 0
Received 0 Likes
on
0 Posts
I am currently installing this on my 09. What started as a simple header install has turned into a 3 day project, though they were basically only half days; no work before 1 in the neighborhood.
I'm sure if I go through and do it again it would be much quicker. So far I broke another bolt on the EGR, third broken bolt on this car :-/. The O2 sensor was a pain to remove and I might have to replace it since it looks like the thread was either cross drilled or a self tapping one; it might be leaking.
Today I should hopefully finish it up. I have to do some grinding on the cat to get it to match up correctly. I'm not sure if that was a bad header design or a change on the 09 cat. My guess is a change on the cat.
I didn't have any fitment issues on the header itself. It bolted up to the block and the only hard part was getting it into position. Once we got it all lined up it was a breeze. I didn't like that they gave you bolts for the EGR. The stock header had built in bolts, which made putting the EGR gasket and tube easier to install. Since I broke a bolt installing it (Again!) I used one of the threaded studs from the stock header. iI'd recommend anyone installing this go this route since it made it easier.
For those wondering the stock heat shield does not fit on this. I know the question was posed. It is also lighter; it seems significantly lighter to me, but I haven't weighed it officially yet. Once the car is actually running I will weigh the old header on a postage scale. I'll also get some videos for sound clips.
EDIT: Here is a link to my friends post in his forums of our problems with pics. I'll be making a post once it is all said and done.
http://www.sr20-forum.com/members-ri...tml#post312262
I'm sure if I go through and do it again it would be much quicker. So far I broke another bolt on the EGR, third broken bolt on this car :-/. The O2 sensor was a pain to remove and I might have to replace it since it looks like the thread was either cross drilled or a self tapping one; it might be leaking.
Today I should hopefully finish it up. I have to do some grinding on the cat to get it to match up correctly. I'm not sure if that was a bad header design or a change on the 09 cat. My guess is a change on the cat.
I didn't have any fitment issues on the header itself. It bolted up to the block and the only hard part was getting it into position. Once we got it all lined up it was a breeze. I didn't like that they gave you bolts for the EGR. The stock header had built in bolts, which made putting the EGR gasket and tube easier to install. Since I broke a bolt installing it (Again!) I used one of the threaded studs from the stock header. iI'd recommend anyone installing this go this route since it made it easier.
For those wondering the stock heat shield does not fit on this. I know the question was posed. It is also lighter; it seems significantly lighter to me, but I haven't weighed it officially yet. Once the car is actually running I will weigh the old header on a postage scale. I'll also get some videos for sound clips.
EDIT: Here is a link to my friends post in his forums of our problems with pics. I'll be making a post once it is all said and done.
http://www.sr20-forum.com/members-ri...tml#post312262
Last edited by michaelsk8er; 10-26-2009 at 08:04 AM. Reason: Added link.
10-26-2009, 10:18 PM
#99
DON'T HATE THE 8
Join Date: Jul 2006
Location: Im' from Guam. Stationed in Colorado. Deployed to Iraq.
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts