Side Mounted Turbo Design
Turbo Mini Forums

Garrett's words on the subject:

http://www.turbobygarrett.com/turbobygarre..._tech102.html#c

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Thanks Paul really useful artical.
I can see where you coming from Rob, ill model both types of manifold and go from there

1972 998 TURBO SLEEPER

On 16th Mar, 2010 longy said:
i am taking note of everyone's input, i just want to get this model finished and then start of other iteration.



As you can see ive merged cyl1&4and used a seperate tube for cyl2&3.
merging the tubes takes ages as they are all on different plane and small changed were needed here and there.

the final model will be exact, notches and bends as they would be when fabricating. at the moment a couple of the tube merge and it look a bit messy

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1/4mile in 13.2sec @ 111 terminal on 15psi

Cheer Matty, ive based the design on 1.5mm wall and 38.1mm Diameter

1972 998 TURBO SLEEPER

Im sure I remember talking to someone about manifold design, and the basic outline is to:

* make the primarys as short as possible
* Make sure they are within 10mm of each other but they should not be exactly the same length

I was told that if the primarys are all the same length it can cause a flat spot at certain RPMs.

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1/4mile in 13.2sec @ 111 terminal on 15psi

The bracket under the turbo needs to be able to accomodate quite a lot of expansion. I'm planning on using a couple of spherical joints that will allow some movement, but still support the weight.

Personally, I think that the 1.5mm wall thickness is too thin with 316 in this application, but worth a try.

Best make sure your welder uses a back purge else you will send loads of crap into the turbo on the first hard run.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Cheers Paul, i was also pondering thermal expansion of the mounting bracket, i was thinking whether a floating bracket could be used. seeing that its mostly a vertical load if i necked the bracket and kept the crossectional area down the heat transfer into the mounting bolts should be reduced. does this sound right or a i talking jibberish lol

1972 998 TURBO SLEEPER

chris,
are you willing to get a batch made?

im sorry but im only going to be making one, but i m happy to share the drafts with anyone who what to make their own

1972 998 TURBO SLEEPER

Not to get too involved, but when I was thinking about a side mount design I always imagined I would put a flexible piece in to deal with expansion. I am not sure if they would take the heat though.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Mount it on long bolts with some springs sandwiched between 2 plates. that way they will dampen any vibration and allow for expansion.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Most of the expansion is going to be pushing the turbo away from the engine in the horizontal plane.

There will not be much vertical or front to back expansion as it is cancelled out due to the location of the turbo.

My current design project is an in-line rear wheel drive 1275 with a turbo over the gearbox, so I'm keen to use something like this.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

i like your thinking matty. thanks for putting me straight paul, so if we allow the turbo to move/expanded horizontally it will take up the effects of heat

1972 998 TURBO SLEEPER

So have you worked out how much its going to cost to make yet?

Edited by matty on 16th Mar, 2010.

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1/4mile in 13.2sec @ 111 terminal on 15psi

not yet

1972 998 TURBO SLEEPER

i'd buy a jig from you,
and or, like a copy of all your drafts!!!
cheers

Ill show carl the drawings and shout "make it" whilst wobling a bottle off beer around on a cane and string!!

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

FECK! DRINK! TI!

joe you reminded me of that classic moment where dougal and ted are playing a board game ,and theyve lost the litle model animal for the game ,and dougal says ''arh thats ok ted ,we can use one of those'' .and he points to a cow out of the window ,about 3 miles away ,and ted says speaking verry slloooowwwlly...

''no dougal ,this is small'' ,holding up a model ...........''and thats far away'' ,pointing at the cow .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

who's axel????
lol

Just a couple of update pics. ive used a collector to merge the tubes into the turbo flange, but i run both pipes separately into the it.

1972 998 TURBO SLEEPER

3 pipe collector ,and run no4 all the way ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Ok Rob ill do that on the next iteration

1972 998 TURBO SLEEPER