So this is the last attempt I'll be making with the car at single digits, as the funding for this project has just about dried up.
Right now I'm making new hot pipes for the Comp turbo, adding the 46mm wastegate, air/water intercooling, and the new cold pipes as well.
I was looking at a few things about doing the hot pipes right (full mandrel everything, 321 Stainless, etc), and found out how quickly you can end up spending about $1,800 in parts and labor if you want professional quality results. I decided to pass, so I'll be doing my own welding.
I'll be using Hotshot primaries, with 2" secondaries.
For the front bank, I am using a rear bank Hotshot header, and will modify it to clear the OEM oil cooler (not going to move that, as fittings alone would be close to $200).
The reason for this is to allow the rear secondary to come up front unimpeded by the front header flange and not having to do a very awkward merge between the banks, something that all kits thus far have shown.
Initially I was going to use a merge collector, taking the two 2" secondaries and merging them into a 2.5" final pipe, formed at the end to fit the divided T4 turbine flange. This means the WG would be mounted on the last 2.5" pipe with an atmospheric dump.
After some talk with a few shops the consensus is that I should just merge each of the 2" secondaries directly into the divided housing, so each half of the turbine would be fed by each bank. This is doable if I form the 2" pipes at the end into rectangles, and from a few minutes of tinkering it looks like it would work. The only downside of this is that I have to have the wastegate fed by each of the 2 secondaries, so either use 2 wastegates (no) or have merged wastegate feeds from each 2" secondary (yes).
So today I got the welding gas filled up, and I should start welding tomorrow. It probably won't be pretty, but if the less than ideal Ludespeed design made 504 whp on a 38mm WG and 2.5" OD downpipe, I think my FrankenTubes should do well.
I still have to look up some numbers and see if each bank can create enough velocity in a 2" pipe, but other than that it should be just sweat, blood and cursewords.
The downpipe (not pictured) is 4"
Right now I'm making new hot pipes for the Comp turbo, adding the 46mm wastegate, air/water intercooling, and the new cold pipes as well.
I was looking at a few things about doing the hot pipes right (full mandrel everything, 321 Stainless, etc), and found out how quickly you can end up spending about $1,800 in parts and labor if you want professional quality results. I decided to pass, so I'll be doing my own welding.
I'll be using Hotshot primaries, with 2" secondaries.
For the front bank, I am using a rear bank Hotshot header, and will modify it to clear the OEM oil cooler (not going to move that, as fittings alone would be close to $200).
The reason for this is to allow the rear secondary to come up front unimpeded by the front header flange and not having to do a very awkward merge between the banks, something that all kits thus far have shown.
Initially I was going to use a merge collector, taking the two 2" secondaries and merging them into a 2.5" final pipe, formed at the end to fit the divided T4 turbine flange. This means the WG would be mounted on the last 2.5" pipe with an atmospheric dump.
After some talk with a few shops the consensus is that I should just merge each of the 2" secondaries directly into the divided housing, so each half of the turbine would be fed by each bank. This is doable if I form the 2" pipes at the end into rectangles, and from a few minutes of tinkering it looks like it would work. The only downside of this is that I have to have the wastegate fed by each of the 2 secondaries, so either use 2 wastegates (no) or have merged wastegate feeds from each 2" secondary (yes).
So today I got the welding gas filled up, and I should start welding tomorrow. It probably won't be pretty, but if the less than ideal Ludespeed design made 504 whp on a 38mm WG and 2.5" OD downpipe, I think my FrankenTubes should do well.
I still have to look up some numbers and see if each bank can create enough velocity in a 2" pipe, but other than that it should be just sweat, blood and cursewords.
The downpipe (not pictured) is 4"
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