Mythbuster: continuing project thread of my 1303 '75

[Sandeep]

I'll keep the .82 in mind before I take the .63 out of its new packaging

My guess on your next turbo is a minimum of a GT35R (GT3582) or somewhere there abouts ... 400 to 650 HP on a minimum 2.0l.

You got to 400hp quickly with this build so I'm thinking ~500hp minimum is your next goal

Sandeep

[Wally]

Originally Posted by Sandeep

I'll keep the .82 in mind before I take the .63 out of its new packaging

A _very_ nice compromise would be the Tial stainless housing Its ~0.78 A/R iirc and saves a lot of weight on the right side of the car...

My guess on your next turbo is a minimum of a GT35R (GT3582) or somewhere there abouts ... 400 to 650 HP on a minimum 2.0l.

You got to 400hp quickly with this build so I'm thinking ~500hp minimum is your next goal

Sandeep

I have no hp goal, but only seek the 'perfect' turbo.
Its not anything like you mention though...
When (if?) it gets here, I'll sure let you know/show you. It is meant for after an engine upgrade tbh, but it would be interesting to try it on the 2,2 first and see the difference later on the bigger engine (which will take a year or two probably..).

[Wally]

Just finally got confirmation that the new turbo had been produced and a small batch was shipped from the Borg-Warner plant to Full-Race.com which just shipped one out to me

How big? Its a T4 Twin-scroll with a compressor in between a 35R and a 40R, so its fairly big

Also got a second hand, but unused waste-gate from evil bay, but need a second one because of the twin-scroll lay-out.

[70Turbobug]

For an even bigger engine like your comming 2413cc, I would surely get the 0,82 A/R if you had free choice. You may loose some spool as opposed to the 0,63, but you already got that covered by the 200cc's more you have over mine...

I agree 100%. The .63 Housing will be too small for a 2.4 L engine.It would spol extremely quick,but I don´t think you would be happy with it.Our Boxer engines make torque really quick and spool turbos usually quicker than other engines,especially as soon as the engine is under load.IMHO due to the 2 valve design and "uncluttered" chamber and realtively short intake and exhaust ports and the large amounts of air volume and air speed generated at lower rpms.Maybe the Subaru guys have to choose a smaller housing to "dial in" their spool up time due to the central/single throtlebody and long intake runners? Just a hunch though on my part,I don´t know enough about the suby for a better argument.
Another thought of mine is,that Wally may need a larger housing because the core engine is more that of a high rpm engine with the large bore and short stroke.So maybe his "power range" is much higher in the rpm band and out of the optimum efficiency range of the current turbine housing.Also the cam (here we go again..) has enough duration and lift to deliver higher rpms and with the 114° (?) LC more stability and valve control and longer off seat time.

[Clatter]

My understanding is that the Vanagon Waterboxer flywheel is forged.
Unlike the Bus, which is cast.

if you see them side-by-side it looks that way.

They both have the same 228, dimensions, etc...

[Wally]

Originally Posted by Clatter

My understanding is that the Vanagon Waterboxer flywheel is forged.
Unlike the Bus, which is cast.

if you see them side-by-side it looks that way.

They both have the same 228, dimensions, etc...

Unfortunately, that myth was busted also...both are cast.

[Humble]

Sounds like you're getting a turbo somewhere in the gt37 family I've actually been looking at the gt37 turbos but I don't have a twin scroll setup. I did find a duall ball bearing replacement cartridge for my t3/t4 so that is a tempting alternative.

[Wally]

I dunno the GT37 family, but this is the Borg-Warner that arrived today. Its freaking HUGE! but I love it

[NO_H2O]

Some grease and a 6 foot shoehorn should get it in there. LOL

[70Turbobug]

Git´er done Wally! That´s big boy allright.You could make a sort of Y- connection for the 2 wastegates and mount them a littel further away.As long as the angle of the pipe is in the direction of exhaust flow it will work just like a shorter connection.It will work trust me,aircraft bleed air systems have such junctions all over and there is never a problem with lack of response.

[Supa Ninja]

Wally your new BW just gave me a full chub. That thing is going to be a monster!

[Wally]

Originally Posted by Supa Ninja

Wally your new BW just gave me a full chub. That thing is going to be a monster!

Yeah, it has monster potential anyways. Lets just hope it doesn't take 6K rpm to spool

[Supa Ninja]

well thats the double edge sword of big turbo's, it will come down to the flow of your engine.

[70Turbobug]

The twin scroll housing will help spool up that large turbo. It´s like having 2 smaller housings that meet up shortly before the turbine wheel.Exhaust gas energy is a little faster and hotter than with a single scroll.

[Wally]

Coming friday 12th November I will enter a driving instruction on the Nurburgring and as its half November, it might get cold then and its a 3,5 hour drive for us.
So, I have installed heating now in the form of a B1L Eberspächer petrol heater. It works and gives off a LOT of heat!