External Wastegate Or Flapper Mod?

[Typhoon]

Hi mate;

I really don’t think you should be too worried about an external gate at this stage.

400RWKW’s is achievable with a standard turbo and internal gate. However you will need to have the waist gate ported with a larger waist gate valve and the actuator upgraded. Keep in mind that this sort of power level is really reserved for the more efficient kits on the market and in my opinion will be a stretch with the modifications you have listed.

Question: Will you be running the factory intake manifold?

If so I don’t believe the 400RWKW target is realistic, let alone needing to worry about an external gate!

Better boost control is always welcome don’t get me wrong; I just personally believe you will run into other problems first before the internal gate becomes a limiting factor.

If I were you I would be focusing on the best plenum and intercooler combo you can find within your budget and start from there. The external gate will not be the make or break when it comes to a target output of 400RWKW’s.

Also a 044 and a surge tank has nothing to do with final power output.

I really don’t know why this has been suggested. Your good old Walbro will do the trick as per the Nizpro Stage 2 Plus Kit which will see over 400RWKW’s on just a Walbro with out a surge tank.

Hope this has helped in some way, any questions let me know.

Regards,

Typhoon

[ETM]

  RAP1D said:

There's a few different mounting options, such as off the exhaust housing offered by ETM, or off the centre section of the manifold if you don't want to cut into the turbo.

Please dont go fitting it to the exhaust manifold as you will completely destroy the (already poor) flow characteristics of the stock manifold, the divider plate in the middle of the collector will have to be removed for the gate to work properly and in doing that you will open a huge can of worms as far as performance and tuning goes as the front and rear cylinders exhaust gas pulses are now pointing straight at each other.

[RAP1D]

Yeah my thoughts too in regards to the theory , but its been done and proven to work... after the collector is always best, but anyway.

[Dirty32]

  Typhoon said:

If I were you I would be focusing on the best plenum and intercooler combo you can find within your budget and start from there. The external gate will not be the make or break when it comes to a target output of 400RWKW’s.

Also a 044 and a surge tank has nothing to do with final power output.

I really don’t know why this has been suggested. Your good old Walbro will do the trick as per the Nizpro Stage 2 Plus Kit which will see over 400RWKW’s on just a Walbro with out a surge tank.

Hope this has helped in some way, any questions let me know.

Regards,

Typhoon

In relation to my suggestion of an 044 & S/Tank, I didnt imply that it had any effect on power output.

As you will see in my 2nd comment, If it were me I would get a Surgetank as added insurance for my engine. I didnt say he needed to get one and that decision is up to him. I did also say that if others are making that power with only a walbro intank, then its obviously possible.

I only mentioned it, as if I were running near 400rwkw, Id hate to fang it coming out of a corner forgetting I have less than a 1/4 tank and come across some fuel surge resulting in detonation and possible engine damage etc (if its a sedan).

So - it was merely a suggestion, I didnt say it was an absolute must and obviously it is an additional cost. Was purely stating that I would be looking into it.

I do however, agree on your comment about getting the best I/C and plenum that he can afford.

Cheers.

[dalts]

  mic said:

DALTS on here has around 400rwk on pump and only runs a walbro.

yeah utes dont surge like sedans do!!also I dont run my boost through the computer!!I have a 12psi actuator and run a $100 turbosmart bleed valve,my boost curve is straight as in any temp conditions,from whatever I set it too,16-23psi,that's a cheap way of doing it,not everyone will agree though!!but its proven and boost comes on very hard!!!

cheers lee

[bjc]

  dalts said:

yeah utes dont surge like sedans do!!also I dont run my boost through the computer!!I have a 12psi actuator and run a $100 turbosmart bleed valve,my boost curve is straight as in any temp conditions,from whatever I set it too,16-23psi,that's a cheap way of doing it,not everyone will agree though!!but its proven and boost comes on very hard!!!

cheers lee

Bang for your buck mod there, Sweet...

[crans]

  HI PSI said:

I will be starting to build my new engine (New block, Spool rods with Cp's) within the next 2 months. I will give the engine in my BAii bottom end a bit of boost as it is stock at the moment. I almost have everything that I need except a cooler and piping.

Siemens,

Dual 2 1/2 exhaust with 4' dump,

Actuator,

Walbro pump

Mal wood stage,

Atomic cams

I will be looking for around 400 Rwkw max. So the standard turbo will be fine. Like I stated earlier, I have a spare turbo exhaust housing. So hacking it isn't a real concern. I just want to justify the extra expense of the external gate and dump pipe alterations.

My car is a 6 speed manual. I know it won't make a 10 and I'm not wanting to enter Horsepower heroes. I just wanna give the Ricers up here in their "sh*tBOX SKYLINES" a bit of grief.

Is the money better spent somewhere else?

edited due to fat finger syndrome.. (typo's)

They cant be that much of a sh*tbox if there beating you now can they? I own a GTR an there not sh*t boxes at all. 20 year old car flogging new cars dont u just love it