Some new pics of completed GenX GT manifolds:
05-16-2008, 05:01 AM
#62
AudiWorld Super User
Join Date: Dec 2002
Posts: 17,772
Likes: 0
Received 0 Likes
on
0 Posts
also good for the cosworth (mean anything to you?!) rs4 380 hp
where they changed most of the plumbing ..but still left manifolds untouched ..
hey don't forget we're talking cosworth .. LOL .. not that there is ANY type of comparison here ( no room for that).
hey don't forget we're talking cosworth .. LOL .. not that there is ANY type of comparison here ( no room for that).
05-16-2008, 12:49 PM
#65
AudiWorld Super User
Thread Starter
Join Date: Jul 2006
Posts: 3,249
Likes: 0
Received 0 Likes
on
0 Posts
I doubt Cosworth had any say in what type of manifolds to go with. The log style type
is much more cost effective than tubular headers. It's not something that would be cheap to mass produce (in comparison to the log style...they already have the basic design and fabrication process from the S4). To switch to tubular headers would have increased operating costs way more..
05-16-2008, 02:12 PM
#66
AudiWorld Senior Member
Join Date: Mar 2006
Posts: 1,068
Likes: 0
Received 0 Likes
on
0 Posts
meh, they "modified" the heads, block, crank, etc so I don't see fabrication cost as a major factor
I just don't think there was that much to be gained at the power levels they were going for, IMO
05-16-2008, 02:16 PM
#67
AudiWorld Super User
Thread Starter
Join Date: Jul 2006
Posts: 3,249
Likes: 0
Received 0 Likes
on
0 Posts
Yep, that's another factor. 380HP doesn't warrant tubular headers...which is the same reasoning
behind these GT kits using tubular headers that are pushing 600+hp. The turbos are very different to K04's, much larger turbine housings and more lag. If lag were an issue with K04's, perhaps Cosworth would have invested in different style headers...but they spool very quick and in stock form isn't producing a massive amount of power.
05-16-2008, 03:39 PM
#68
AudiWorld Senior Member
Join Date: Mar 2006
Posts: 1,068
Likes: 0
Received 0 Likes
on
0 Posts
agreed, but I think the original agrument by lemieux was "stock manis are pretty ok imho."
so for the RS4 they changed basically the entire intake; piping, heads, and pistons, rings, etc etc, but they left the exhaust manifolds untouched. I can only assume that they thought they were pretty OK as well.
Now, for this applications, pushing double the RS4 flow, I don't think anyone is really arguing that tubulars are a bad choice AND these do look very nice.
A lot of the B5 crowd has been around a long time, and has seen a lot of products not pan out. I just think many are skeptical these days without seeing some data.
Cant wait to see your project finished.
cheers
Now, for this applications, pushing double the RS4 flow, I don't think anyone is really arguing that tubulars are a bad choice AND these do look very nice.
A lot of the B5 crowd has been around a long time, and has seen a lot of products not pan out. I just think many are skeptical these days without seeing some data.
Cant wait to see your project finished.
cheers
Thread
Thread Starter
Forum
Replies
Last Post
MarTT
TT (Mk1) Discussion
23
08-14-2006 07:24 AM
