merge or not to merge
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From: owen sound,ON, canada
merge or not to merge
ill be getting the h22 header form prospeed soon and im torn between mild steel with merge collecter or stainless with out ....
what kind of diff in hp would i expect from a merge collector
ill be running my diy itbs and type s pistons and i hope one day to have jun 3s..
thasnks
what kind of diff in hp would i expect from a merge collector
ill be running my diy itbs and type s pistons and i hope one day to have jun 3s..
thasnks
Joined: Jan 2003
Posts: 436
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From: Sac Town, Ca
Re: merge or not to merge (es_squared)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by es_squared »</TD></TR><TR><TD CLASS="quote">on a stock motor the dif is about 2whp</TD></TR></TABLE>
What about on a built head...?
What about on a built head...?
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Joined: Mar 2004
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From: San Diego, CA
Re: merge or not to merge (es_squared)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by es_squared »</TD></TR><TR><TD CLASS="quote">on a stock motor the dif is about 2whp</TD></TR></TABLE>
your not talking a difference in HP, your talking a difference in efficiancy... No matter what you have done to the motor the merge collector will always be more efficiant there for will net more of a gain...
Get the merge, dont half *** it...
your not talking a difference in HP, your talking a difference in efficiancy... No matter what you have done to the motor the merge collector will always be more efficiant there for will net more of a gain...
Get the merge, dont half *** it...
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From: East Bay, CA, USA
Re: (machine4321)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 »</TD></TR><TR><TD CLASS="quote">ok i guess ill be getting the merge with mild stell ....damit i love the look of stainless 
</TD></TR></TABLE>
Stainless is overrated. Get a functional coating on that header.
</TD></TR></TABLE>Stainless is overrated. Get a functional coating on that header.
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From: owen sound,ON, canada
theres a thread in the all motor forum about the an-r cracking really bad ...not sure if it was mild or not but would stainles be stronger?
i would hate to have it crack on me
i would hate to have it crack on me
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From: Charlotte, NC
Re: (machine4321)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sharkcohen »</TD></TR><TR><TD CLASS="quote">
Stainless is overrated. Get a functional coating on that header.</TD></TR></TABLE>
Stainless is not "overated" stainless exhibits superior properties in soooo many ways over mildsteel
Mild Steel is a great material for making mock ups it often does not do very well in high heat (even all motor) and high vibration applications. It also will break down and corrode over time even with a "functional coating"
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 »</TD></TR><TR><TD CLASS="quote">theres a thread in the all motor forum about the an-r cracking really bad ...not sure if it was mild or not but would stainles be stronger?
i would hate to have it crack on me </TD></TR></TABLE>
I can't think of a way that stinaless isn't superior to mild steel
Stainle<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by es_squared »</TD></TR><TR><TD CLASS="quote">on a stock motor the dif is about 2whp</TD></TR></TABLE>
The difference is not always 2 WHP. On properly engineered header with a merge collector gains of anywhere from 5-15 WHP on a 4 cylinder engine are achievable as long as your engine is developed the properly
Stainless is overrated. Get a functional coating on that header.</TD></TR></TABLE>
Stainless is not "overated" stainless exhibits superior properties in soooo many ways over mildsteel
Mild Steel is a great material for making mock ups it often does not do very well in high heat (even all motor) and high vibration applications. It also will break down and corrode over time even with a "functional coating"
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by machine4321 »</TD></TR><TR><TD CLASS="quote">theres a thread in the all motor forum about the an-r cracking really bad ...not sure if it was mild or not but would stainles be stronger?
i would hate to have it crack on me </TD></TR></TABLE>
I can't think of a way that stinaless isn't superior to mild steel
Stainle<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by es_squared »</TD></TR><TR><TD CLASS="quote">on a stock motor the dif is about 2whp</TD></TR></TABLE>
The difference is not always 2 WHP. On properly engineered header with a merge collector gains of anywhere from 5-15 WHP on a 4 cylinder engine are achievable as long as your engine is developed the properly
Honda-Tech Gold Member
Joined: Jun 2003
Posts: 5,568
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From: Orange County, Ca, USA
Re: (eLusive ek4)
One of my friends showed me his custom Prospeed header for his H22A/EG. It's stainless steel and I had to recommend him to get it coated because it was already showing rust and he had just picked it up.
Also, I noticed that the flange part that bolts onto the head was severly distorted. I sent him to another buddy to get it milled flat.
So be sure to get it coated and check the surface to see if its flat. His was in the shape of a W. There was about an 1/8 of an inch gap in the middle and on one of the ends. Probably due to pulling and tugging while the upper pipes were already welded. I really can't believe it was distorted becase the flange is really heavy gauge metal.
Besides that, the header was beautiful. Equal length with step design. The 4-1 collector was freaking awesomely welded.
Also, I noticed that the flange part that bolts onto the head was severly distorted. I sent him to another buddy to get it milled flat.
So be sure to get it coated and check the surface to see if its flat. His was in the shape of a W. There was about an 1/8 of an inch gap in the middle and on one of the ends. Probably due to pulling and tugging while the upper pipes were already welded. I really can't believe it was distorted becase the flange is really heavy gauge metal.
Besides that, the header was beautiful. Equal length with step design. The 4-1 collector was freaking awesomely welded.
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From: Charlotte, NC
Re: (ScareyH22A)
I have a few accociates that are employed by them, and we are also working on some projects with them as we speak. After all they are 2 miles away from us 
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ScareyH22A »</TD></TR><TR><TD CLASS="quote">One of my friends showed me his custom Prospeed header for his H22A/EG. It's stainless steel and I had to recommend him to get it coated because it was already showing rust and he had just picked it up.
Also, I noticed that the flange part that bolts onto the head was severly distorted. I sent him to another buddy to get it milled flat.
So be sure to get it coated and check the surface to see if its flat. His was in the shape of a W. There was about an 1/8 of an inch gap in the middle and on one of the ends. Probably due to pulling and tugging while the upper pipes were already welded. I really can't believe it was distorted becase the flange is really heavy gauge metal.
Besides that, the header was beautiful. Equal length with step design. The 4-1 collector was freaking awesomely welded.
</TD></TR></TABLE>
You do not need to coat stainless steel if it was stainless it shouldn't have been rusting hence the word stainless.
Second if the flange they are using is stainless it probably warped during the welding process. We don't recommend stainless flanges to the "amateur fabricator" not saying in anyway that pro speed are amateurs. It is just somehting that can and will happen if close attention is not payed to the heat used during the welding process.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ScareyH22A »</TD></TR><TR><TD CLASS="quote">One of my friends showed me his custom Prospeed header for his H22A/EG. It's stainless steel and I had to recommend him to get it coated because it was already showing rust and he had just picked it up.
Also, I noticed that the flange part that bolts onto the head was severly distorted. I sent him to another buddy to get it milled flat.
So be sure to get it coated and check the surface to see if its flat. His was in the shape of a W. There was about an 1/8 of an inch gap in the middle and on one of the ends. Probably due to pulling and tugging while the upper pipes were already welded. I really can't believe it was distorted becase the flange is really heavy gauge metal.
Besides that, the header was beautiful. Equal length with step design. The 4-1 collector was freaking awesomely welded.
</TD></TR></TABLE>
You do not need to coat stainless steel if it was stainless it shouldn't have been rusting hence the word stainless.
Second if the flange they are using is stainless it probably warped during the welding process. We don't recommend stainless flanges to the "amateur fabricator" not saying in anyway that pro speed are amateurs. It is just somehting that can and will happen if close attention is not payed to the heat used during the welding process.
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Joined: Jan 2004
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From: Orange County, CA
Re: (eLusive ek4)
Hit the search function and type prospeed header, i got pics of mine posted. No warpage, no "rust" and it will turn pretty golden when it gets hot. I figured if this is going to be the last header ill ever have to buy for this car, may as well make it a bad *** one.
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