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Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

I've been gone awhile and it seems ESC and the other Supercharger guys may have fallen through. I just wanna say that while this didn't work many of their concepts are universal and don't deserve to be given up on. Just maybe not with Housebrauen.

This said I propose an open source supercharger project inspired by a piece of software I found.

http://www.emachineshop.com/

features a free download of cad software with instant pricing and machine options.

While playing with this software I found that a generic bracket cost $120 while an order of ten became $20 a piece.

If we as a community decided on a particular Supercharger unit, we could design a bracket and for mounting the unit.

Then we could use the same procedure for fuel management.

As long as we share our designs and ideas we could build a kit. on a pretty good budget.

by keeping the project out of the hands of a single person or group we should be able to avoid the housebrauen bubble burst, and acually get a finished project as fast as we want it.

in short lets try to agree on parts in such a way we can group buy all the individual parts to assemble a kit.

Happy Thanksgiving and stuff
Adam
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88 924S Red

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

Wow, thats a great idea. I bet you could get 10 people to do this. I sure would love a supercharger, but Ive got my money tied up in other things right now.

Ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

Well I did some online browsing of SC units and... I know twinscrews won't work.

I don't remember how much they were but I do remember that I made myself forget how much they cost.

unless they came down to less than half their retail price for our use, it is too much.

I'm looking at a vortec next, unless some one knows of a good affordable unit that is available in good quantity.
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88 924S Red

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

The fact that they work so well is kinda the reason they are so expensive and thus don't work for us.

K.I.S.S. (Keep It Simple Stupid)

I'm not sure but is the plumbimg of your twinscrew a little more compicated than, say a CF type.

I don't like the idea of an eaton even though they are nicely sized, nicely priced and for the most part have good avail.

There would have to be a sort of intermediate pipe that would act as an adapter to the SC output, and would probably negate the money savings to go with that SC.

I may go look for a turbo rebuild shop tomorrow and see they can recommend something, unless the guys here have any suggestions.
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88 924S Red

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Not sure if it is any more difficult but it is not easy either way. The drive system is actually one of the more complicated parts of either. You can see the plumbing is really no big deal on mine.

Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

simsport · Joined: 06 Nov 2002 Posts: 573 Location: UK Warrington

What do you mean 'some sort of intermediate pipe'?

The eaton will work if bolted direct to your plennum. In fact an Eaton m45 would work with an NA engine with no need of an intercooler.

Picture the void below the std manifold plennum, then picture an alloy plate/box welded to it blowing direct into the engine. The throttle would need to be repositioned, no big deal .

I would love a whipple for the extra boost it makes, however the Eaton is a great compromise. You can find them cheap if you look. My new unit cost £200 off ebay!

As for the centrifugal units it all depends on what you want from the engine. The best of those units will give you much higher boost but will deliver it towards the higher end of the rpm scale, the eaton will make lower outright boost but will be there from any engine engine speed.

Speed requires available power!

Cheers
Simon
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Blown is always best!

Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

I mean that 90degree bend that would have to be manufactured, designed, and seal well. an Adapter for that rectangular port to a circular pipe.

Is that an Eaton/Whipple in the pic above?
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88 924S Red

leadfoot · Posted: Mon Nov 27, 2006 4:45 pm Post subject:

An eaton M45 or an Aisin SC14 are going to be your best choices for an afforadble SC kit.
I've seen the M45 on ebay for between $200/400AUS and the SC14 can be bought directly from an Jap importer at $350AUS
Both are roots, plentiful, small and cheap...
Leadfoot
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

before this goes too far I don't have the 2.0 924 but the 2.5 924s. So I have to take your word for it about it fitting the plenum, but I know thats how the Eatons are suppose to mount. IIRC cars with the Eaton factory have special intake manifoldsso the Eaton can bolt up to it.

So my worry comes from mating the Eaton to an intake tube. Perhaps I should look into that because if some company makes adapters that would put my worry to rest and then aside from the rear intake of an Eaton it would be the most ideal in every way.

Is the M45 the unit off the MB kompressors or is that the M60?

I heard that the SC off a kompressor of Mazda Millienia would be the best size and I think that was the M60.

I also heard of some one using an M90 on a full blown 2.0 race/GT car in Europe, I think.
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88 924S Red

leadfoot · Posted: Mon Nov 27, 2006 5:15 pm Post subject:

I think the new mini uses an M45... kompressors possibly...
using the intake plenum would make a solid mount but I would still have some tabs under it allowing a lower manifold support to be used.
Using a larger blower would be counter productive... you want to have the smaller blower drive higher so that the efficiency is better, rather than underdriving a larger blower.
leadfoot
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

Ghosthacker · Joined: 10 Feb 2003 Posts: 78 Location: Fort Worth, Texas

Hey take a look at this

http://www.overboost.com/story.asp?id=153

It shows a plenum/adapter that bolts right up to an (M42???)and includes a bypass/recirculation valve. Says its from Jackson racing

Food for Thought

also I know the 944 ECU has a Fuel Quality switch Detailed by a man on Rennlist called (?Frwilk?)

I think this switch will scale the fuel map up or down and even retard the timming by a few degrees.

what about 924 2.0 (?CIS?) can the same be done on this platform

I got class tommorow I'll be on again after that
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88 924S Red

Oysteinrb · Joined: 21 Oct 2006 Posts: 47 Location: Norway

In fact, i am in the process of modelling a bracket, tubing and everything else to make a Eaton m90 bolt on to my 944 NA engine... i can post pics when i am done if anybody is interrested...

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

blown 944 · Joined: 27 Mar 2007 Posts: 26

I have done one and love it. here's a link to the latest happenings

http://forums.pelicanparts.com/showthread.php?s=&threadid=336650

On the cam regrind I would be interested in what you have done