Rule of thumb with exhausts, if it looks right it is right. Obviously there is much more to it then that, but look at the bends on the standard manifold, lovely smooth curves without too many unnecessary changes of direction to interrupt flow. I realise there are packaging issues as you have limited space to fit all the extra components needed for a turbo installation but the manifold is arguably the most important part of it and I'm afraid DP haven't made the most of the space available. The harmful pressure waves created by badly designed manifolds can damage engines and turbos very quickly.

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

Who me?

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

Both of you? Do you have any experience with dp manifolds comparing to others?
The car's out put is 280 bhp at 0.7 bar. It's not that bad, I think.

i will use my manifold that i built for a comparison.

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The bottom picture shows my manifold which is considerably more "efficient" than the dp manifold, it has less bends and "slacker" angles whilst still retaining equal length primaries. Another thing that DP Engineering do not provide for their manifolds is a hangar assembley to mount the turbo from to reduce the load on its manifod, this is a must for any tubular manifold as it will just crack and you will loose performance. (Both manifolds use 38mm tubing also)

I hope this helps a bit.

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Well said, while I have no doubts about DP's fabrication ability, it looks nicely made, I have too have issue with the design, it looks like something a skilled pipe welder made rather than an experienced exhaust manufacturer. Too much effort has gone into making it fit a certain space with too little thought as to the best routing to get fast efficient gasflow out of the head.

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

DP does provide a hanger for the turbo. I have it installed.
So you say dp manifolds are not worth the price.
The manifold you presented in the pic above - how much do you charge for that? What material is it?

Fatlapit when you have finished your car will you be able to make a turbo kit for the gti6?

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TEAM Supercharged Rallye

Thinking of boosting again tom?

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See the sheer power and might of the lesser known burrowing owl.

You never know mate, if i do i want to go down a tried and tested route instead of being the guinea pig and getting shafted for ££££'s lol. Plus would buy a kit and do it myself lol.

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TEAM Supercharged Rallye

Well not acording to torque techniques and various other exhaust builders.

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304 has better crack resistance due to elevated carbon, but reduced resistance to corrosion, 316 resists corrosion excellently because of its higher content of chromium and nickel, however it's more likely to crack next to the welds when exposed to temperatures above 450 deg C for long periods due to the formation of crystalline grain structures in the heat affected zones adjacent to the welds.
Unless its a marine application with a water cooled exhaust I'd be using 304. Cat back, centreboxes, exhaust tubing and rear silencers/tsilpipes are all ideal things to make from 316 as they deal with far less heat and are subject to cortosion (we've all seen manky looking 'stainless' exhausts) but the manifold, where the real heat is, go 304.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars