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MikeDanger
Joined: 21 Nov 2002
Posts: 774
Location: Denver
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 Posted: Tue Mar 26, 2013 7:03 pm Post subject: Custom turbo header group buy? |
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Hey guys, So, I have contacted a Factory that says they can make copies of my header:
But they have to have an order of 30 peices.
But the price would be somewhere around $300(this estimate is just looking at the picture, will get a final cost once I send them the proto)
what do you guys think?
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Tue Mar 26, 2013 7:31 pm Post subject: Re: Custom turbo header group buy? |
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Oops! 
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'80 924 Turbo
Last edited by Khal on Wed Mar 27, 2013 3:01 am; edited 1 time in total |
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Tue Mar 26, 2013 8:46 pm Post subject: Re: Custom turbo header group buy? |
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| Khal wrote: | Is that a joke?
(I see your spanner, and I raise you "quality" and, frankly, a need to do better, you laughing stock of the rest of the world.) |
"Quality" - you mean as opposed to the POS cast manifold that cracks when you look at it?
Everything becomes easy when you're a critic.
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Raceboy
Joined: 01 Mar 2004
Posts: 2327
Location: Estonia, Europe
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| Posted: Tue Mar 26, 2013 9:14 pm Post subject: |
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What's so bad about that header??
it is tackwelded together, not received final welding and made out of mild steel which is totally acceptable and in my opinion preferrable.
Actually I'm in the progress of fabricating exhaust manifold for my Gulf out of mild steel and covering it with ceramic coating later.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold 
'84 924, turbocharged, sold.
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Tue Mar 26, 2013 9:16 pm Post subject: Re: Custom turbo header group buy? |
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| WEASEL149 wrote: | | Khal wrote: | Is that a joke?
(I see your spanner, and I raise you "quality" and, frankly, a need to do better, you laughing stock of the rest of the world.) |
"Quality" - you mean as opposed to the POS cast manifold that cracks when you look at it?
Everything becomes easy when you're a critic. |
Hold on, mine havent cracked..yet, i have two perfectly healthy manifolds 
That header looks a bit extreme, i mean, you need a different exhaust system...then you must at least relocate the CIS if not install EFI...dont know if you can keep the pop-ups...and performancewise..the factory manifold is also good for quite some HP.
I'd spend some money on a header that fits in the stock position, is as durable or more durable than the stock manifold, offers the option to use different turbos AND flows better.
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Raceboy
Joined: 01 Mar 2004
Posts: 2327
Location: Estonia, Europe
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| Posted: Tue Mar 26, 2013 9:27 pm Post subject: |
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My biggest problem with stock manifold is that access to turbo, oil lines etc is a nightmare.
I cannot afford a full day to change out leaking turbo oil supply line.
With custom one, you can place connections so that it is accessible with little effort, not by wasting valuable time and utilize your whole cursing word dictionary.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Wed Mar 27, 2013 12:50 am Post subject: Re: Custom turbo header group buy? |
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| morghen wrote: | Hold on, mine havent cracked..yet, i have two perfectly healthy manifolds
That header looks a bit extreme, i mean, you need a different exhaust system...then you must at least relocate the CIS if not install EFI...dont know if you can keep the pop-ups...and performancewise..the factory manifold is also good for quite some HP.
I'd spend some money on a header that fits in the stock position, is as durable or more durable than the stock manifold, offers the option to use different turbos AND flows better. |
I also have 2 uncracked S1 manifolds, and one of them is arrow straight (which is even more unusual) but they are prone to it.
It's not the fact that it's cast or even the flow but the fact that it's a very poor and cheap effort by Porsche, almost as if they designed it to crack.
Relocating the CIS is not too big a deal if you don't want EFI and aren't that concerned about originality.
Stock turbo position is a bit low IMHO and coming up with a v-band system and intermediate pipes for various turbo solutions wouldn't be rocket science.
At the same time a new 3 inch down pipe should be seen as just another improvement with the option of then moving to a full 3" system as funds allow.
Not to mention the fact that the stock wastegate positioning and associated 'j-pipe' could be heavily improved on at the same time. Any turbo book you look at tells you the stock location of the 930 gate is crap.
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Wed Mar 27, 2013 12:54 am Post subject: |
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| Raceboy wrote: | My biggest problem with stock manifold is that access to turbo, oil lines etc is a nightmare.
I cannot afford a full day to change out leaking turbo oil supply line.
With custom one, you can place connections so that it is accessible with little effort, not by wasting valuable time and utilize your whole cursing word dictionary. |
I totally agree. It is surely worth all the 'hassle' fitting a custom system just to enable sensible and easier maintenance.
Personally, I think if the above manifold clears the steering column on a RHD car and anything else in the way, then for $300 it looks like a reasonably priced option to me?
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Wed Mar 27, 2013 1:02 am Post subject: |
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In fact if the custom manifold is easier to get on and off, it would also make changing the head gasket an easier proposition.
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Wed Mar 27, 2013 1:17 am Post subject: Re: Custom turbo header group buy? |
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| WEASEL149 wrote: | Stock turbo position is a bit low IMHO and coming up with a v-band system and intermediate pipes for various turbo solutions wouldn't be rocket science.
At the same time a new 3 inch down pipe should be seen as just another improvement with the option of then moving to a full 3" system as funds allow. |
Its not about what kind of science it is to make all that stuff..its about...is it worth the money and time spent kind of science.
If you're a hardcore racer trying to get up on a hill fast then yes..but for the average joe trying to enjoy his sporty car...well its not 
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flosho
Joined: 01 Jul 2004
Posts: 3160
Location: Eau Claire, Wisconsin
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| Posted: Wed Mar 27, 2013 1:22 am Post subject: |
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Has that header since been completed and tested in the car?
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Wed Mar 27, 2013 1:38 am Post subject: Re: Custom turbo header group buy? |
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| morghen wrote: | Its not about what kind of science it is to make all that stuff..its about...is it worth the money and time spent kind of science.
If you're a hardcore racer trying to get up on a hill fast then yes..but for the average joe trying to enjoy his sporty car...well its not |
Yeah, I understand where you're coming from Morghen. It all depends on what you're into I suppose and what aspects of car ownership you enjoy.
I'm biased and I say any 931/2 is worth spending money on, regardless of how much it's worth, but that's just me.
I also spent too much money tuning a classic mini when I was a teenager but i enjoyed every minute of it.
For the record, my current build is keeping the stock exhaust manifold for now, but if I ever get the damn thing back on the road and tuned correctly, then the exhaust may come under extreme scrutiny 
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MikeDanger
Joined: 21 Nov 2002
Posts: 774
Location: Denver
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| Posted: Wed Mar 27, 2013 2:10 am Post subject: |
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Sorry I forgot to mention, My intent with this header was to make it for use with "regular turbos" so you could use anything with a t3 mount or V band.
Equal length runners also will be making each runner, a slip fit into the collector.
and anything is better than the stock log style header, and just about any newer turbo will out perform the stock turbo....
AND you could even use a water cooled turbo if you wanted! Imagine that!
SO
1 its much lighter,
2 easier to work with
3 will help the engine run cooler
4 perform better (equal length headers),
5 give you better options regarding turbo choices.
6 Not crack
7 Stainless
Oh and yes I had EFI in mind. Im sure the stock CIS could be made to fit, but CIS is for masochists!
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It was either this or a giant box of legos
Last edited by MikeDanger on Wed Mar 27, 2013 2:16 am; edited 2 times in total |
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MikeDanger
Joined: 21 Nov 2002
Posts: 774
Location: Denver
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| Posted: Wed Mar 27, 2013 2:12 am Post subject: Re: Custom turbo header group buy? |
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| Khal wrote: | Is that a joke?
(I see your spanner, and I raise you "quality" and, frankly, a need to do better, you laughing stock of the rest of the world.) |
are you some sort of #### moron?
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Wed Mar 27, 2013 2:32 am Post subject: |
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| MikeDanger wrote: | Sorry I forgot to mention, My intent with this header was to make it for use with "regular turbos" so you could use anything with a t3 mount or V band.
Equal length runners also will be making each runner, a slip fit into the collector.
and anything is better than the stock log style header, and just about any newer turbo will out perform the stock turbo....
AND you could even use a water cooled turbo if you wanted! Imagine that!
SO
1 its much lighter,
2 easier to work with
3 will help the engine run cooler
4 perform better (equal length headers),
5 give you better options regarding turbo choices.
6 Not crack
7 Stainless
Oh and yes I had EFI in mind. Im sure the stock CIS could be made to fit, but CIS is for masochists! |
Well Mike, we've seen some nice custom headers on here over the years (Bass GT, Flosho, GeorgeV off the top of my head) but I think you may be the first trying to get a group buy together for similar, so credit to you for giving it a shot.
The prototype looks impressive enough but I think you'll have to probably show a finished version to tempt enough people and even then, 30 may be difficult.
If the header is indeed universal i.e. LHD and RHD with no possible steering column or parts conflict going on then it will increase your possible interested parties.
If it is easy to work with, proven to fit correctly and costs around $300 then I think i could be persuaded.
I would then use an intermediate pipe incorporating the exit for a small external wastegate with v-band fittings for everything and try to keep the turbo relatively high up for oil drainage.
It wouldn't be difficult to adapt your design to a split pulse set-up 
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