[bmwheath]

So i have just found out there are now "outlets" from MMP. And MMP are also doing a full silicone hotside pipe which would work nicely with the silicon inlets!
Who is jumping on that bandwagon??

[DR-JEKL]

It's never ending isn't it

Spoilt for choice on this platform ATM with all the new turbo, inlets outlets pi kits etc!

[bmwheath]

Originally Posted by DR-JEKL

It's never ending isn't it

Spoilt for choice on this platform ATM with all the new turbo, inlets outlets pi kits etc!

Tell me about it. I keep going away from the forums for 2 or 3 weeks, and everytime i come back there is something else new i feel i just have to have lol
Im currently restoring the SLR5000, and just bought a new Hilux dual cab turbo diesel and trying to put a big stereo system in that along with some other mod's, its all a bit much lol

[iliketurtl3s]

So cheap

[Scotty89]

The more you buy, the more you part out when you sell.

I say keep going buddy. I could do with a few more second hand mods.

[iliketurtl3s]

If only the inlets fit rhd

[Mayuri Krab]

Originally Posted by Scotty89

The more you buy, the more you part out when you sell.

I say keep going buddy. I could do with a few more second hand mods.

Hopefully this means the bmw group on Facebook will one day be as big as the JDM one I'm also part off where I can buy all sorts of random shite for my skyline for $100 lol

[_ink]

It's raining inlets!!

[iliketurtl3s]

Originally Posted by Mayuri Krab

Hopefully this means the bmw group on Facebook will one day be as big as the JDM one I'm also part off where I can buy all sorts of random shite for my skyline for $100 lol

Only girls drive skylines

[bradsm87]

Neither the VTT nor the MMP hot side charge pipes merge into one anywhere near as nice as the stock items. They are also both gross overkill in terms of size, introducing an unnecessarily large amount of volume after the turbos which will cause a little lag. The MMP item flows 10x the stock flow. Even the craziest setup is 3.5x stock power. 10x flow potential is unnecessary. I'm gonna make my own 1 5/8 into 2.75" custom aluminium hot side charge pipe with a nice merge. That'll still have double the flow potential compared to the stock item, plenty enough.

[Socket]

Originally Posted by _ink

It's raining inlets!!

+1 hahah

[Scotty89]

Originally Posted by bradsm87

Neither the VTT nor the MMP hot side charge pipes merge into one anywhere near as nice as the stock items. They are also both gross overkill in terms of size, introducing an unnecessarily large amount of volume after the turbos which will cause a little lag. The MMP item flows 10x the stock flow. Even the craziest setup is 3.5x stock power. 10x flow potential is unnecessary. I'm gonna make my own 1 5/8 into 2.75" custom aluminium hot side charge pipe with a nice merge. That'll still have double the flow potential compared to the stock item, plenty enough.

Weren't you going to do a kill-all single turbo RHD kit too? Where is that?

[Rob@RBTurbo]

Originally Posted by bradsm87

Neither the VTT nor the MMP hot side charge pipes merge into one anywhere near as nice as the stock items. They are also both gross overkill in terms of size, introducing an unnecessarily large amount of volume after the turbos which will cause a little lag. The MMP item flows 10x the stock flow. Even the craziest setup is 3.5x stock power. 10x flow potential is unnecessary. I'm gonna make my own 1 5/8 into 2.75" custom aluminium hot side charge pipe with a nice merge. That'll still have double the flow potential compared to the stock item, plenty enough.

Quite possibly the most intelligent post I've seen to date regarding outlets.

To be fair the VTT inlets are actually sized ideally (1.50" ID) when it comes to max sizing, but they are also lacking nice transitional adapters and do not have the most ideal merge angle for the front turbo. Using the face of the housing for the O-ring seal also requires a perfect housing face, which may not always be possible as some of these units end up with bumps and bruises at that location. Then despite the casted elbow (that was casted to distance the silicone from the manifold) it still appears to come extremely close, a nice touch but the casting angle could use some steep revisions in my opinion.

The MMP units with the 2.00" primary pre-merger plumbing would be great for a turbo setup capable of 1000+rwhp, but extreme overkill for these tiny N54 1.00" outlet housings capable of much less. The transitional adapters are a nice touch, but it's very evident the amount of overkill built into them as you look at it (akin of shooting a pea through a cannon). Also there was no consideration for the silicone proximity to the manifold on the front turbo, and worse yet with the extremely large 2" elbow 90* fitting you end up with silicone nearly sitting on the manifold.

I've been mulling over the idea of just offering a full solution for all options, while correcting all of the above, but in the meantime I'd still say either of the above would be better than OEM (if it were to fit on RHD). Yet both certainly have room for significant improvement.

At the end of the day none of these will work for you guys due to fitment, and since your biggest outlet issue is the rear turbo outlet being literally smashed the current RB offering wouldn't do much for you either. You're going to have a wait a bit yet I'd say.

Rob

[bradsm87]

Thanks for the clarification regarding VTT's outlet diameter. I made an assumption that it was similar to MMP size-wise.

I've got a couple of ideas for a nice RHD outlet, but both ideas require modifying the compressor housing itself, killing the ability to exchange or easily sell the turbos.

[Rob@RBTurbo]

Originally Posted by bradsm87

Thanks for the clarification regarding VTT's outlet diameter. I made an assumption that it was similar to MMP size-wise.

I've got a couple of ideas for a nice RHD outlet, but both ideas require modifying the compressor housing itself, killing the ability to exchange or easily sell the turbos.

From what I can tell (from pictures) it appears it could be doable with the housing unaltered... if not one way then definitely another. The first approach would be to angle down and towards the front of the car, and then pop back up once past the steering column. In that area it seems like there could be enough real estate to pass a charge pipe through.

[Brule]

All we need is a nice merger to intercooler that can be clamped onto the existing pipes towards the turbos. (RB silicone chargepipe in image)

It is easy to get rid of the squashed rear pipe.

I just cut the squash out and got someone to weld it to be a tube shape.
Everyone should be able to get this done for $100.



Making a custom joiner out of aluminium from intercooler to silicone should be easy.

Thats my plan on the RB Stealths coming

[DR-JEKL]

Is there any documented gains on this mod?

[bradsm87]

Originally Posted by Rob@RBTurbo

From what I can tell (from pictures) it appears it could be doable with the housing unaltered... if not one way then definitely another. The first approach would be to angle down and towards the front of the car, and then pop back up once past the steering column. In that area it seems like there could be enough real estate to pass a charge pipe through.

I agree it's definitely possible to do with unmodified compressor housings but I think a nicer end result could be had by starting to open up the diameter at the compressor outlet itself and cutting the outlet back a touch would allow a more gradual bend and still have enough steering column clearance. I'm thinking that I'll wait until I get bigger turbos then chop the V-band off, open up the inside diameter of the outlet and weld a 1.5" tight alloy bend straight on to it. A straight silicone joiner can then join that to the main 1.5" alloy pipe. The front turbo can retain the V-Band. The whole thing would be one-piece alloy fabricated item except the one 1.5" straight joiner to the rear turbo and a joiner to the intercooler. I understand that this is somewhat of an impractical solution for most but I think it'll have the nicest end result.

Originally Posted by Brule

All we need is a nice merger to intercooler that can be clamped onto the existing pipes towards the turbos. (RB silicone chargepipe in image)

It is easy to get rid of the squashed rear pipe.

I just cut the squash out and got someone to weld it to be a tube shape.
Everyone should be able to get this done for $100.

Making a custom joiner out of aluminium from intercooler to silicone should be easy.

Thats my plan on the RB Stealths coming

The only catch is that there are still sections of 1" pipe, including tight 1" bends which I think is the biggest part of the problem, even with the squashed bits removed.

[Rob@RBTurbo]

Originally Posted by Brule

All we need is a nice merger to intercooler that can be clamped onto the existing pipes towards the turbos. (RB silicone chargepipe in image)

It is easy to get rid of the squashed rear pipe.

I just cut the squash out and got someone to weld it to be a tube shape.
Everyone should be able to get this done for $100.



Making a custom joiner out of aluminium from intercooler to silicone should be easy.

Thats my plan on the RB Stealths coming

This is the ideal solution IMO. The only issue is that it requires some effort cutting off the front pipe, knocking out a crimp, and putting a beaded edge on the end. It seems this is more work than anyone is interested in doing though, so we may offer a full solution. For the RHD guys of course you still have to modify the rear section of the pipe as you describe.

[Rob@RBTurbo]

Originally Posted by bradsm87

I agree it's definitely possible to do with unmodified compressor housings but I think a nicer end result could be had by starting to open up the diameter at the compressor outlet itself and cutting the outlet back a touch would allow a more gradual bend and still have enough steering column clearance. I'm thinking that I'll wait until I get bigger turbos then chop the V-band off, open up the inside diameter of the outlet and weld a 1.5" tight alloy bend straight on to it. A straight silicone joiner can then join that to the main 1.5" alloy pipe. The front turbo can retain the V-Band. The whole thing would be one-piece alloy fabricated item except the one 1.5" straight joiner to the rear turbo and a joiner to the intercooler. I understand that this is somewhat of an impractical solution for most but I think it'll have the nicest end result.

You can't modify the housing to improve it really. It is a 1" housing by full design, so it is what it is...

My suggestion is to wait a tiny bit longer and find you have all of your wishes met.

Originally Posted by bradsm87

The only catch is that there are still sections of 1" pipe, including tight 1" bends which I think is the biggest part of the problem, even with the squashed bits removed.

This is not correct. The Compressor HOUSING has a 1" ID outlet. The PIPING leaving the housing is 1.375" ID, which is already quite a bit larger than the housing outlet. It also has very nice bends, at least on the LHD vehicles where there are no crimps. The very turbo side end of the piping does have a 1" adapter that transitions from the Compressor Housing Outlet ID to the PIPE's ID, which is a good engineering practice to transition the flow. This is why I say the piping is actually quite a fair match for the application. 1.5" would also be acceptable IMO.

Thanks,
Rob