I wish Turblown offered their longer runner "EWG" manifold without the spots for the wastegates so it could be used for the IWG turbo's. I'm not a fan of the shorty one for a couple reasons. The flow problem that has been mentioned multiple times on the rear runner is one. The other is how close it puts the turbine housing to the lower intake manifold I think creates some heat management issues with the intake runners. I prefer the turbo to be spaced a little further away so that you can get some substantial heat barrier in there between the turbo and the lower intake manifold. I would also like to see the runner lengths be closer to equal but I honestly don't know how much benefit this has. Would be nice to move the turbo rearward if possible to open up more area in front for a bigger airbox/air filter setup of some sort. It's especially difficult to create a proper airbox when you run a v-mount intercooler. This is just my personal opinion on what a "best" exhaust manifold would be from the perspective of a person running a IWG turbo on a LHD car.

Their longer manifold also puts the turbine close to the lower intake manifold, specially the front runner.

I realize that you can only get so far away from the lower intake manifold simply due to the space constraints in the general area. It's going to be a tight fit regardless but it'd be nice to have at least an inch or so in between the turbine housing and the lower intake. So far the best manifold design I have seen (in my opinion) is the style that Howard Coleman builds. I'd love to have one of them setup for the IWG turbo.

If the manifold runners slope down to the turbo instead of the usual up you can get a little more room between the intake manifold and turbo exhaust housing.

https://cimg5.ibsrv.net/gimg/www.rx7...c88a57a4c8.jpg
https://cimg1.ibsrv.net/gimg/www.rx7...2dbb606b69.jpg


Its awesome Turblown appears to be working on refining their short cast manifold.

It would be sweet if they offered a version like the manifold I am using that places the turbo far back and down. Fixes IWG flow and clears stock heater core hard and softline.

Has anyone run a G45 size turbo or bigger on the turblow long runner ewg mani on a fd3s?

yes I have a car with a g45 with oem intake manifold on Turblown ewg

@BLUE TII What turbo manifold is this? Who made it?

j9fd3s tracked oy down to being the manifold from the HKS "sport" turbo kit for FC3s.

Though they are rare, they only sell for a couple hundred $ because no one wanted to run T4 flange IWG turbo on rotaries before the EFR turbos.

As you can see from 2nd pic I had to mill the turbo flange at a slight angle to fit the EFR 8374/9180 compressor housing as close to XS LIM as possible for clearance to the unibody.

Turblown has an improved IWG manifold. Excited to see results.

Anyone dyne'd the Artec yet? It's been out for a while

Raceonly has something in the the works!

I'm at a bit of a loss as to why they didn't have the wastegate flange tight under the turbo flange, less manifold volume and you can run the gate outlet on the path those runners go?

Subframe is in the way, not much room there.

Raceonly said they would dyno it about a month ago. I’m really surprised nobody else has dyno’d one yet.

Sometimes things take time. Hit a few other snags with it so working through the issues. First install always takes the longest

Should have a few samples in the next few weeks( currently being machined; these pics below are pre machining) , but as far as a back to back dyno, that will probably take some time...
https://cimg2.ibsrv.net/gimg/www.rx7...42f4b693b6.jpg

Video of Artic manifold:

this was done at my shop

Do you think it matches a conventional divided manifold for boost threshold?

Doesn't look like you have extraction on that bay, still worth doing even next to the door.

Can we see a dyno printout? We all want to see what the boost threshold is

Very cool video!

a friend has one on an REW in an RX8 chassis with a Pulsar G35-900, but no dyno.

mostly posting to say it fit in the RX8 chassis with REW conversion.
.

Killer, looks great. I'm actually waiting on a Artec and 50mm gate setup to fiddle with on an 8374 as well. Hopefully creep isn't an issue for either of us.

I will have a car on the dyno tomorrow that should answer that

50mm wastegate
8374
Artec manifold
e85
3.5 inch down pipe
exhaust cut out

should really test it out

We do. It goes straight out the drivers side of the car, probably can't see in the video.

To your first question, when you say boost threshold, what do you mean by that?

He did put one in the video I believe, Right towards the end. Shows the different boost levels etc