Turbo manifolds???
#16
01-31-2011, 11:41 AM
Still, using pV = kNT,
p = kNT/V;
Hence, as the volume increases, the pressure decreases. Moreover, the more surface area there is on the exhaust manifolds, the more energy is being dissipated before the exhaust gases reach the turbos. In other words, the termperature of the exhaust gases will drop a little, which also will drop the pressure differential accross the turbine.
From what I have seen on our platform, the log style manifolds seem to provide faster spoolup than tubular manifolds. The tubular manifolds should provide a bit better high rpm performance because there will be less back pressure, hence the engine will breath better.
If you search the my350Z site, str8dum1 plotted his dyno chart and and others for comparison purposes. str8dum1 has tubular manifolds. He has very high top end power, but does not fully spool up until beyond the 5k rpm range.
p = kNT/V;
Hence, as the volume increases, the pressure decreases. Moreover, the more surface area there is on the exhaust manifolds, the more energy is being dissipated before the exhaust gases reach the turbos. In other words, the termperature of the exhaust gases will drop a little, which also will drop the pressure differential accross the turbine.
From what I have seen on our platform, the log style manifolds seem to provide faster spoolup than tubular manifolds. The tubular manifolds should provide a bit better high rpm performance because there will be less back pressure, hence the engine will breath better.
If you search the my350Z site, str8dum1 plotted his dyno chart and and others for comparison purposes. str8dum1 has tubular manifolds. He has very high top end power, but does not fully spool up until beyond the 5k rpm range.
#18
02-12-2011, 02:30 AM
I useds these guys for my BMW M3 project. These guys can build you a set...holl at Jon..
http://www.666fabrication.com/gallery.html
Custom Fabrication: Need custom fabrication work? Be it a set of custom headers, intake manifold, roll cage, or turbo plumbing, I can design and produce a one-off product to suit your needs. Labor rate for fabrication work is $100/hour plus materials.
Development, Jigging, & Production services: Have a product that you would like
to produce for your own catalog? I will work with you through all stages of
development...whether starting from an idea or jigging an existing piece for production.
The time, difficulty and cost of materials is, of course, the determining factor on cost.
Jigging a part for production will involve a one-time jig/setup fee depending upon the
product and any subsequent products produced will be a standard flat rate. Please
contact me for further information on such services.
http://www.666fabrication.com/gallery.html
Custom Fabrication: Need custom fabrication work? Be it a set of custom headers, intake manifold, roll cage, or turbo plumbing, I can design and produce a one-off product to suit your needs. Labor rate for fabrication work is $100/hour plus materials.
Development, Jigging, & Production services: Have a product that you would like
to produce for your own catalog? I will work with you through all stages of
development...whether starting from an idea or jigging an existing piece for production.
The time, difficulty and cost of materials is, of course, the determining factor on cost.
Jigging a part for production will involve a one-time jig/setup fee depending upon the
product and any subsequent products produced will be a standard flat rate. Please
contact me for further information on such services.
#19
02-13-2011, 01:16 PM
#22
02-18-2011, 07:33 PM
#23
02-22-2011, 02:06 PM
its never been shown 1 way or the other if tubular manifolds are better than the cast logs on a VQ. both kinds have made tons of power, but obviously you cant do back to back comparisons.
the simplicity of the cast logs outweighs the amount of massage/fabrication it takes to properly fit a tubular manifold setup on all but the biggest builds.
the simplicity of the cast logs outweighs the amount of massage/fabrication it takes to properly fit a tubular manifold setup on all but the biggest builds.
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