924Board.org

[simsport]

Hi, can anyone help me please
I am just kicking around the idea of using the lysholm supercharger from a 2.3 ltr mazda but wondered what boost they can run and if they are an oil sealed unit like an eaton or have an external supply.??

Thanks
Simon
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Blown is always best!

[Lizard]

Hello Simon,

Long time.

Its redline will be in the 14,000-16,000 range. Though aftermarket bearings support it up to 20,000RPM.

It is not a sealed oil unit (meaning it is supplied from the engine and needs a return.

Its a 1200cc per revolution unit.

How much boost are you wanting to run?
If you spin at max RPM it will depend on your cam, head, intake etc as to how much boost you will make.
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3 928s,

[RC]

Did you forget this thread Simon?

Dunno what happened to Dan`s pics, or his intentions for using it. Trust he has no objection to me posting a link to his album: https://picasaweb.google.com/111470514161382354517/Superchargers

Although its not a bad blower it`s housing design is not particularly efficient and far from adaptable/ modification friendly, being significantly more hassle to mount & plumb than the M62.

Info with further links here:
http://www.superchargerperformance.com/supercharger-power-parts/engine-performance-parts-for-the-mazda-millennia


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World`s quickest 924 2L slushbox

[ideola]

No objection to the links!

This unit is still sitting on the shelf. My intent was to use this as the basis for a twin-charged setup, running the IMI supercharger as a first stage, and a high-output modified turbo-charger as a second stage. In stock form, the research I did indicated that the stock bypass valve bolted to the top of the Mazda unit would limit boost to 14 psi. I removed the bypass valve, and the design I was working on was to use an aftermarket bypass valve that would reduce the S/C boost to something like 10 psi, and then have the turbocharger take over from there.

I have not yet made any serious attempts to look at mounting, but this unit is large, and in particular is somewhat long (front to back). The biggest obstacles to overcome will be oil supply, and mounting the unit so that it doesn't interfere with the brake booster or steering shaft, while still providing a clear path to the hood for routing an intake duct. The oil supply will require developing some custom means of integrating oil feed, because it appears to be engineered specifically to ports on the Mazda engine, as opposed to having any sort of adaptable lines or disconnects.
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erstwhile owner of just about every 924 variant ever made

[simsport]

Thanks guys, I do recall these being discussed before and although they do seem capable of the necessary boost they are very long.

I think that length might be an issue for me as it would leave no room to the
rear. I am able to fit the m62 unit in with some space to spare, I think even an m90 could fit and I could use one of those.

What I'm after is more boost pure and simple. I am at 8.5:1 and can lift that to
perhaps 9:1 without det problems given my motec setup. I did look at the new Harrop 1320 tvs blower but it costs a heck of a lot. There was one from a Lotus on ebay but it had a bespoke casting and long nose drive so again, too big for the 924 engine.

I have read about porting the m62 for more boost and lower temps but I find numerous differences of opinion on its worth and reliability.

I have asked Magnusson if they ever port/tune the series 1v M62 models (with built in bypass), as I guess if that made another 2 psi it might be worth it.

Did look at the Rotrex type but despite what they say I just cant get past the fact I'm running with an 8 valve 2ltr and so reduced low down boost to get increased top end boost might sound like a good idea, however I reckon response will be down enough to negate the benefit overall.

I also need new pistons at max oversize, specials if its at 9:1 in turbo format.....eek it all costs this stuff!

Cheers
Simon
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Blown is always best!