Turbo high flowing!!

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Originally Posted by twin eng, twin turbs

I used 4mm wall thickness mild steel steam pipe bends for the runners for good reason. On my 1.8t audi a4 i made a similar manifold running a GT 25/40 turbo without any problem for years. Its so solid that it dosn't warp or crack. My mk2 has a similar set up with water cooling around the turbine flange which has kept the temps down preventing any cracks or gasket issues. After having made stainless manifolds in the past with thinner wall thickness (1.6mm) i have had issues with them cracking and flanges warping causing leaking gaskets. Thats why i make mine from mild steel with much thicker wall thickness.

Turbo is based on a GT35r with modified housings, ported and polished for improved flow etc

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Makes perfect sense.

The watercooling idea sound's like a beaut too. Would like to see some pic's of it.

I'm not a big fan of the stainless gear either.

All the the stuff I've been involved with has also been steam pipe straight from Reece plumbing. Strong, easy to work with & almost every bend you could ever need.

This is how I'd like mine setup on the "one day" 20vt.

Have the turbo hanging off the side, on top of the gearbox, shortening the pressure piping by at least a foot, reducing the exhaust down pipe radius & also being able to get fresh air straight into it.

Only draw back is relocating the booster/master cyl. assembly remotely.

http://www.vwwatercooled.com.au/foru...Exhaust1-1.jpg

http://www.vwwatercooled.com.au/foru...08/10/21-1.jpg

That looks awesome! you have been putting a lot of thought into this... I made a similar manifold setup on a nissan ET pulsar running a CA18DET with a t3/t4 though the exhaust was at the front the 3" down pipe i had going over the gearbox and down.

One thing to consider is manifold length although tuned length is good the longer the runners are the less heat energy and pulse from the exhaust stroke hits the turbine. Shorter runners will have improved low end response but dont flow the top end nearly aswell as longer tuned length manifolds.

Autodesk Inventor CAD model?

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Originally Posted by Preen59

Autodesk Inventor CAD model?

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Nah matey.

Didn't mean to fool both of you.

Christ I'm not that good on a computer. Can't even circle item's in pic's or draw arrow's on photoshop!!!!

Found the pic somewhere, like the idea, design & thought it would work really well on a golf, due to turbo, intercooler & intake placement.

I didn't really matter about the tuned length runner's or the length. More placement.

I learn't from a friend who has alot do do with rotary's, that if it's all smooth & no sharp kink's, it doesn't matter about if there the same length or not. It will still work!

Look at how much power can be made on standard early headed cast holden v8's exhaust manifold's with a single turbo. 600+hp is easily achievable!

It's to run a GT3076R with a .82AR ex. housing by the way.

Looks like an auto-desk inventor jobbie, would love to see that in real life!

here are some pics now the mk2's back on the road.

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Originally Posted by richo

here are some pics now the mk2's back on the road.

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Richo??? The Mk2 looks like crap with those big bumpers hehe.. :nana: Just kidding. When are you gonna give me a spin HMMMMM?

ha preeny, it's rich (marty's bro)! i was down during the week. my A4 is in the background of one of the pics. he won't let me drive it, so good luck man!
cheers

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Originally Posted by twin eng, twin turbs

I used 4mm wall thickness mild steel steam pipe bends for the runners for good reason.

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- and its really easy to TIG at that thickness ;-)

seriously though, its great to see some proper fab happening.... very inspiring for me - i spend many mornings during my commute thinking of parts to make but just don't have the time.... gee its going to be nice when uni is finished...

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Originally Posted by golfworx

It's to run a GT3076R with a .82AR ex. housing by the way.

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oh is that all....you might aswell just do away with your engine completely, join the compressor outlet straight to the turbine inlet and start injecting kerosene!

mmm i love thinking about jet engines.... i mean big turbo's.