Guys, Girls. Just chasing some places to get high mounted exhaust manifolds. For vlt of course. Pictures would be great, as I've seen some pretty nasty looking ones. And prices of what people pay for these? As for what turbo to suit etc. Right now I have no idea, I'm still deciding on that.

chris, talk to 6BOOST, i believe he makes some pretty good ones.

Yeh but what rougly price Nut300?

i dunno. that's why i said talk to 6BOOST because he is the one that makes them...

Hey guys, I do make them, as you can see in the pic, which is the manifold I made for OSK. I have also done all the fabrication work on cmy747's car, there are some pics of it in the members section. I normally charge $1100 for them, faced ported, sandblasted inside and out, painted black and with new manifold studs and nuts. As an offer to Calais turbo members, if I get 2 people at a time to make them, I'll do them for $950. They are fully tig welded with laser cut 16mm head plates, come with external gate outlet($50 less if you don't need it), and I use the latest technology in the collector design, with what they call a merge collector, like on formula 1 engines and V8 drag cars. All the pipes enter at the exact same angle, and meet at a point in the middle, pointing straight into the turbine. No pipes enter across at any angle at all, and the design actually helps scavenge the exhaust of the other runners. If you get an air blower and blow into the head plate side into any 1 port, it actually sucks on you hand on the other 5 ports, its pretty amazing. I finshed one for a workshop here in brisbane last week, Mercury Motorsport, for their S15 200sx. The engine was already full house with cams and internals, plenum and 700 roller. By changing the exhaust manifold and ceramic coating the pistons only(of which is more longevity, not hp related), the engine went from making 410.5 on 28 psi, to 441.4rwhp on 23.5 psi. A gain of 31rwhp at 5psi less boost, over an already custom made stainless manifold. This was an independent test, I am not associated with their shop in any way, and the results are direct from them, I wasn't even their when they tuned it. I am in the process of tryin to find an RB25 with a lot of work done to back to back one of manifolds, and also the same with an RB30. If there are any genuine people out there that are not associated with any workshop, preferably in brisbane, a may be intersted in building a manifold to back to back for you for what it costs me in materials. Keep in mind though that I would like 350-400rwhp-ish type combinations to test the manifold to get a good comparison at the levels a lot of us strive to achieve reliably. Best bet for pics is to msg cmy747 and tell him to email the picks of his manifold to me so I can send them to you all, cause I'm sure he'll get the sh1ts having to send them to 50 people and I've been askin him for them for weeks Cheers...........................6BOOST [phone removed] Some original photos have not been recovered yet.

u could use mine kyle but then the turbo ill most likely end up gettin prob wont fit on a std manifold so i guess u cant do back to back wit mine but these manifolds are unreal guys!!

definetly looks like an awsome manifold 6boost, merge collector is spot on too! you know your ****!

nice lookin manifold - if you do em for 25 heads i might get one from you in a while. can't do back to back testing on mine though, the turbo i need will definately not fit on the standard 25 manifold Some original photos have not been recovered yet.

I would love to see some pics of this too if someone could post them. Especially the merge collector.

I've got a fair few if anyone wants to attach them or host them, I'll try and send a few of the better pics that you might like to see. I make them to suit any engine and any turbo configuration, although cost may vary with extra complexity. 6BOOST

use http://www.imageshack.ws/ to host pics.

some pics of 6boosts work

& more of the collector

SH!T yeah, that looks mad, no wonder they work so well.

Thanks col, now send me the rest ya sh1t! 6BOOST Some original photos have not been recovered yet.

Nice engine bay on that car. but now you have shown the pic's it will be copied by the back yard boys.

i doubt it as that collector while being a work of art,doesnt suit a rectangular flange.

Nice collector pics, I know how hard this is to acheive because I am trying to build one back yard style myself. Nice rocker cover fittings cmy747.

"Nice engine bay on that car. but now you have shown the pic's it will be copied by the back yard boys" Seeing as how it takes an indexing head in a mill, a custom made jig to hold them, and a lot of experimenting to get right, every single angle has to be the exact same, and the angles between each cut have to be within 1 or 2 degarees or you end up with gaps. I doubt anyone will be copying it anytime soon. Besides, even if they could, if they were going to that much trouble to make the collector, they wouldn't be paying me to make one for them anyway, they'd just do it themselves. "i doubt it as that collector while being a work of art,doesnt suit a rectangular flange" Another typical comment. Thats like saying a round exhaust runner doesn't suit a oval exhaust port, like all DOHC nissans and most toyota's, but I'm pretty sure every exhuast manifold i've ever seen for one has round runners, not oval. The fact it has a round hole at the turbine plate means very little, it would actually help a bit. The hole is made to be the same width as the smallest part of the rectangular hole, so it meets 2 walls of the turbine housing perfectly. The 2 sides that are slightly inside the long side of rectangular inlet however, would stop reversion. Ever heard of "laminar flow"?? Its the characteristic where intake and exhaust runners don't actually use all the diamter of the runner, they use almost to the outside, but leave 1 or 2 mm all the way round teh diameter where it just doesn't touch the wall of the runner. This area is where the air turns around when it hits a restriction or valve/turbo, and turns around and heads back the other way. In an intake manifold, this is where you get secondary and 3rd wave cylinder pulses, or what they sometimes call "ram tuning", and the reason tuned intakes work so well, the air that has travled backwards up the intake runner hits the inside of the plenum and turns around again, and pushs more air back down the intake runner. Its all a bit too complicted for me to write simply but you get the drift. On the exhaust side, this can be a positive, or a negative. NA engines rely on some back pressure to make power. Some people have thougth this to be bull sh1t, but its not, the small amounts of burnt gasses and left over particles of fuel actually help get a better burn/combustion of the next cylinder fill. On a turbo engine however, there is ALWAYS back pressure, even on formula 1 engines of yesteryear which had the best intake/exhaust pressure ratio of anything yet. So anything whatsoever you can do to get more gass out of a turbo engine, the better. What does this hae to do with out rectagle turbo plate and round hole? Or laminar flow? Well, they actually used to make little cones that sat inside the runners exhaust runners in F1, with little steps in them, so the air that travled out of the head could flow forwards, but when it came back the other way under this "laminar flow" it would hit a series of little "shoulders" on the back square edge of the cone. This stoped reversion, and when you have it in a turbo engine, it takes up even more space in the cylinder with too much waste gas, and limits the power of the next cylinder cycle. The shoulder that is left in the rectangle versus round runner stops the air turning around and heading back to the engine when it hits the restriction point, being the turbine wheel and start of the turbine scroll, it effectively acts like one of those reversion cones. The only reason I could see that you would thing that it is no good is becuase of an eddy current on the back edge of it cuaseing a restriction, but it just doesn't happen in this situation, go grad an air blower or a water hose and turn it on full bore. Then stick it through a flat plate and tell me if that changes anything?? No, it doesn't, the air hammers out of this collector so god damn hard and at the turbine wheel so well, that the small lip your thinkin of isnt gonna stop anything. And if you wana find a 3rd party that has nothin to do with either of us, I'll prove it, I'll back to back one of my manifolds against yours and see who's makes more Hp and spools up the quickest. Let me know if your keen, I'd love to give it a go, and not even to be a prick or a hero, as a geniine back to back hp test against another manifold out there, the more feedback we all have the better we can build our cars. 6BOOST Some original photos have not been recovered yet.

nice thesis. nice attitude. nice manifold.