SKULD 666

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Hi Stephan

Even some of our turbo based engine have pretty big compressor power consumptions , the GT6041 I used in my kart had a compressor consuming ~300 hp at full power .

As a rough guide the comp in the average DIY engine will need around 100 horsepower for every pound per second of mass flow ...................any wonder they're thirsty buggers :-)

Cheers
John

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A pic of TPE331 compressor size compared to a Garrett GT6041 comp (106mm inducer , 141 mm exducer )

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Comp in its wooden comp cover pattern ready for casting from

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setting out diffuser vane angles using rotary table on mill

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Cutting the timber for the diffuser wedges

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another pic of cutting the wedges


Pic showing how 2 degree angle on wedge cut is achieved using suitable packing under one side of jig , packer is switched to other side when cutting the other edge of the wedge

[pitciblackscotland]

Hi John,
Looking good. It's going along nicely. Are you using a metal cut off saw?

Cheers,
Mark.

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Hi Mark

Yep , I just swap out the disc for my wood saw's blade , works OK :-)

The hardwood I'm using for the wedges was some old shelving I found in the garage , well seasoned , possibly brushbox like the flooring in the house , there was heaps of it locally.

Theres a lot of waste making wedges as theres a need to hang onto the piece of wood whilst cutting , I use a bit about a foot long and cut wedges from both ends .

Cheers
John

Cheers
John

[pitciblackscotland]

Hi John,
OK i see ;D I was thinking of getting one of those cheap bunnings drop saws, but now i will do what you have done thanks for the idea . I'm looking forward to see these parts when they get down here ;D

Cheers,
Mark..

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Hi Mark

All I had to do was turn up a packing ring/bush to centralise the wood blade once I removed the larger metal bush for the metal disc from the shaft , a bit of a fiddle the first time but easy now that I have the bush made . .................necessity was the mother of invention ...............I needed to cut wedges for the 9/94 comp diffuser but didn't have the use of my brother drop saw anymore after the move to Sydney .

You should have them in your hands in probably a months time if all goes well , pattern making is a slow process for me , waiting for glue to set , then thinking how to make the next bit takes time ....................I've got to make the axial "wall" at the tip of the diffuser main wall next, it'll use a couple of 2mm thick two ply sheeting strips glued together after being wound around it with "builders bog" in the backside to get a fillet and some strength , a fiddly job getting it just right with both diameter and 2 degree "release" angles , but I've done it before so shouldn't have any problems , just takes a couple of days ....................maybe even longer with these big bits .

Cheers
John

[stoffe64]

hmmm..now i found a reason to buy wood tools:) very interesting this thread, now to the question, where can I find such a nice compressor wheel and turbine wheel from such an engine, i want such!!

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Hi Stephan

My wood working tools and skills are limited , we don't need a lot to make reasonable patterns to cast up parts .

LOL.......wood working makes so much mess in my shed , fine sawdust goes everywhere , I'll be happy once I'm turning the alloy castings .

TPE parts are available , just a matter of searching .

Cheers
John

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Two layers of 2 ply glued around diffuser wall , held in place with a winding of wire until dried.
A rebate was turned in the diffuser wall for the ply to seat into .

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