hx35 on 7mgte

[IndigoMKII]

Okay so I've purchased a 7 blade hx35w. My plans are getting the t4 turbo kit from driftmotion without the turbo and machining my own adapter plate to go from t4 to t3.

With this and my other mods, I'm hoping to be able to run close to 450 hp while building another engine on the side.

Any other ideas to mount the hx35 to my 7m?

 

[Suprapowaz!(2)]

Will something like this work, or will the turbo hit the shock tower? Is that holset internally gated? 3" vband turbine outlet?

http://www.ebay.com/itm/T3-CT26-CT20-Turbo-Flange-Adapter-35-38-Wastegate-MR2-/330378863962

 

[IndigoMKII]

It's internally gated but I'll be welding the gate shut. Has a 3" vband on the turbine outlet as well. If the turbo gets too close to the shock tower, I can try to move it away with the t4 to t3 adapter I'll be making.

 

[zby67]

why welling the gate shut? i dont get the point to that...

 

[IndigoMKII]

why welling the gate shut? i dont get the point to that...

You'll never control the boost accurately without boost creep while using the internal gate. I'll be using a 50mm external wastegate.

Plus the internal wastegate doesn't open until roughly 23 PSI.

 

[speedfreak426]

Here is how I mounted my H(Y)35

I did indeed weld the internal W/G shut and used an enternal 46mm gate, and it works perfectly.
I did not use the OEM exhaust outlet, I bought a holset flange and welded a vband onto it for a cleaner look. The holset cast piece is damn ugly.

I bought separate T3 and T4 flanges, and welded them up to suit my own needs for my application, so I could make it fit perfectly. If you have good welding skills, I would recommend doing it this way.

Please note, this is not in a supra chassis, it is in a 1st gen Celica

 

[IndigoMKII]

Here is how I mounted my H(Y)35

I did indeed weld the internal W/G shut and used an enternal 46mm gate, and it works perfectly.
I did not use the OEM exhaust outlet, I bought a holset flange and welded a vband onto it for a cleaner look. The holset cast piece is damn ugly.

I bought separate T3 and T4 flanges, and welded them up to suit my own needs for my application, so I could make it fit perfectly. If you have good welding skills, I would recommend doing it this way.

Please note, this is not in a supra chassis, it is in a 1st gen Celica

Nice job. I'll be doing something similar but machining my own t4/t3 adapter out of probably SS304. I'll also have to probably use the NA power steering res to get more clearance around the exhaust.

With the manifold and downpipe will be wrapped in exhaust wrap, I will also probably be using the thermostatic controlled oil cooler on one of the stickies around here as well.

 

[IndigoMKII]

Okay so my hx35 finally arrived. It's a 7 blade version with the divided exhaust manifold.

It's got a back plate on it designed for a v-band. I've measured this and it comes out to 3.107" on the outside of the band. Will a 3" v-band downpipe work with this?

 

[IndigoMKII]

Starting to put more thought into my hx35 turbo build, I've already torn down the turbo and cleaned up all mating surfaces along with sealing the waste gate hole.

Does anyone see any problems with using this kit from DM without the turbo? http://store.driftmotion.com/static/i-7m-gte67mmturbokit.php

The inlet on the hx35 is 4" so the pipe and everything will work, I'll be making my own t4 to t3 adapter as well. Getting the pipe to go from 4" down to 2.75" for my lex afm might be fun.

 

[IndigoMKII]

I'm also thinking about milling the v-band off of the compressor housing, thoughts? It's a 2.9" v-band with it going down to 2.5" behind it, I'm thinking of just milling it down to 2.5" but leaving a bump on the end so the coupler won't just slide off.

 

[IndigoMKII]

Does the HX35 need an oil restrictor for a m12x1.5 to -4an fitting for the oil feed?

My return will be a -10 an drain with the steepest angle possible to the return.

 

[sheedy126]

i think i read somewhere on the dsm forums about running a -4an feed with a 1.5mm oil restrictor because holsets dont like high oil pressure.

ill be running this http://www.ebay.com/itm/150998420015?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
with -4an feed and -10an with my hx35

 

[IndigoMKII]

I've read that as long as the oil PSI doesn't exceed 72 psi, then one isn't required. Hmm, I might try to dig around some more.

 

[sheedy126]

found this info on dmstuners.com, should be in the holset hx repair manual as well
http://www.dsmtuners.com/forums/turbo-system-tech/244467-holset-hx-35-oiling.html#post151402191

"Straight from the holset hx repair manual .pdf:

8. Normal oil temperature is 95+/-5°C (203+/-9° F). It should not exceed 120°C (248°F) under any operating condition.
9. Any pre-lube oil must be clean and meet the minimum CD classification.
10. The orientation of turbine housing, bearing housing and compressor cover is fixed according to application. During installation, do not attempt to rotate these components. Inclined turbocharger installation is not recommended. If an installed angle is necessary, oil inlet centreline must be +/- 10 degrees from vertical and rotor centreline +/- 5 degrees from horizontal.
11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal.All turbocharger applications require a pipe of internal diameter greater than 19 mm which has integrated connectors. To ensure oil returns into the engine under all operating conditions, the return connection into the engine sump must not be submerged and the outlet flange of the turbocharger must be 50 mm above the maximum oil level of the engine sump pan. Crankcase pressure should be limited ideally to 0.8 kPa (0.12 lbf/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.
12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).
14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum torque speed."

 

[eraezer]

Just wanted to add something for others looking to do this install.
Since the turbine housing is twin scroll, the internal WG will only went one of the sides and that is why there will be boost creep. So if one wants to use the internal gate, another hole is needed.

 

[IndigoMKII]

Talk about turbulence in the exhaust housing..

 

[IndigoMKII]

Little update on this.

I've received my hx35 and ordered a few fittings for it. I've started to modify the turbine housing to get rid of the internal wastegate completely and reduce turbulence at the exit of the housing.

Here's my t4 DM manifold, the manifold surface is flat but the turbine and wastegate surfaces are not. They will be getting milled flat.

Here's the hx35 with fittings/flanges on it. I'll be removing the bracket in this picture with the mill then slowly hand grinding the surface smooth again.

This is the v-band attachment that came with the hx35, it's been put on the surface grinding to make sure it'll seal to the turbine housing.

The turbine housing has also received the same smooth surface to ensure a good seal.

I'll update a few more times today. Sorry for the pictures but I didn't think they were bad for a droid razr m.

 

[empera]

So i just started looking at this thread and i might've missed it. What's the spool like with this?

 

[IndigoMKII]

I haven't installed the hx35 yet, mine's the 7 blade compressor housing with the 12cm^2 turbine housing which IIRC is a .9x a/r. I'm hoping for around 450 rwhp at 20 psi.

DSM's are seeing full boost by around 4k using the twin scroll setup, which is what I'm using. My guess for expected spool should be around 3.5k for full boost. They say the holsets go from 0 psi to full boost within a few hundred RPM.

 

[empera]

oh...im still undecided on what to use in my datsun....i think this may actually be too big