Cosworth Supercharger Owners Thread

[weederr33]

Originally Posted by muckypuppy

Hi guys. You can add me to the list as well. I have been running stage 2.3 since late June... finally got around to registering on the forum. I know mine was the first one up and running in Australia, and to date I still have not heard of another down here. Oh, and Happy New Year to you all.

Welcome! How are you enjoying your kit?

[killboy]

Yes! My tuner (Sharif @ Forged Performance in GA) is going to be getting in contact with you guys after holidays for a smaller pulley option also. We recently upgraded engine internals, fuel system, clutch, half shafts, etc to handle more power. If we can't get a pulley option from you guys, and frankly I'd like to see more than a 10% change considering how built our motor is, then we are going to source it out to a machine shop to just lathe us one.

Originally Posted by Matt@Cosworth

Gents & ladies

I've been trialing a 10% smaller pulley in our dev car that seems to work with our standard 2.0 variant tune but gives another 0.1 Bar boost pressure so up to about 0.6 from about 0.5Bar

So I'm considering offering this as a separate product
Now this would invalidate any warrenty offering on our kit as its not been through the same validation process but it should offer another 20Bhp or so and is a bolt on
naturally this is getting into the dangerous area of cylinder pressure that originally we deemed unwise so it would be sold with no warrenty given or implied for the rest of your engine

as long as this is understood up front I don't see an issue with it as its how the rest of the tuning industry operates

any takers? I would need a reasonable level of interest to get workable sized batch of parts signed off so we can sell for a reasonable price

[weederr33]

Originally Posted by Matt@Cosworth

Gents & ladies

I've been trialing a 10% smaller pulley in our dev car that seems to work with our standard 2.0 variant tune but gives another 0.1 Bar boost pressure so up to about 0.6 from about 0.5Bar

So I'm considering offering this as a separate product
Now this would invalidate any warrenty offering on our kit as its not been through the same validation process but it should offer another 20Bhp or so and is a bolt on
naturally this is getting into the dangerous area of cylinder pressure that originally we deemed unwise so it would be sold with no warrenty given or implied for the rest of your engine

as long as this is understood up front I don't see an issue with it as its how the rest of the tuning industry operates

any takers? I would need a reasonable level of interest to get workable sized batch of parts signed off so we can sell for a reasonable price

This would be most interesting! However, I have a few questions...
Are you guys planning on validating this pulley? such as putting it through extensive testing? As well... whether it be with this kit or not, do you guys plan on offering any sort of forged internals or (dare I ask) an official Stage 3 kit? As much as I'd like the extra 20hp, I'd prefer it be as well tested as the other stages. Hence the reason I chose the Cosworth over others.

[muckypuppy]

Originally Posted by weederr33

Welcome! How are you enjoying your kit?

Never fails to bring a huge smile to my face. My BRZ also sports the full STi parts catalogue from the BRZ tS .... also have the recaros from the tSGT package. My other car is a MY08 Subaru Liberty/Legacy Tuned by STi, and the BRZ was always a bit of a disappointment power wise until the Cosworth came along. Now my biggest problem is deciding which car to take out for a spin in the hills .

[Matt@Cosworth]

Originally Posted by weederr33

This would be most interesting! However, I have a few questions...
Are you guys planning on validating this pulley? such as putting it through extensive testing? As well... whether it be with this kit or not, do you guys plan on offering any sort of forged internals or (dare I ask) an official Stage 3 kit? As much as I'd like the extra 20hp, I'd prefer it be as well tested as the other stages. Hence the reason I chose the Cosworth over others.

Adrian at Fensport has been running our forged internals in his turbo race car for the last 8 months or so at about 480Bhp level
so we're planning on releasing these at some point in the near future

regarding a fully validated stage 3 set of parts 'may' happen but my bosses are looking to sell more stage 2 kits before embarking on a full stage 3 program

[Matt@Cosworth]

Originally Posted by killboy

Yes! My tuner (Sharif @ Forged Performance in GA) is going to be getting in contact with you guys after holidays for a smaller pulley option also. We recently upgraded engine internals, fuel system, clutch, half shafts, etc to handle more power. If we can't get a pulley option from you guys, and frankly I'd like to see more than a 10% change considering how built our motor is, then we are going to source it out to a machine shop to just lathe us one.

understood

please note that there's not physically any room to fit a smaller diameter pulley on the nose of the SC than this new 10% smaller part

the next option after this will be to increase the diameter of the crank pulley and so increase the blower speed that way , this will involve machining off the stock ribs and sweating a new outer ring onto the stock pulley

[JerryIII]

Originally Posted by killboy

Yes! My tuner (Sharif @ Forged Performance in GA) is going to be getting in contact with you guys after holidays for a smaller pulley option also. We recently upgraded engine internals, fuel system, clutch, half shafts, etc to handle more power. If we can't get a pulley option from you guys, and frankly I'd like to see more than a 10% change considering how built our motor is, then we are going to source it out to a machine shop to just lathe us one.

Same boat here lowered the compression 10:1 forged internals ect. And also had Sharif tune mine would also like to get more power then .1 bar but is is a start

[ajc209]

how much power do we think the drive train can handle with track abuse?

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[ajc209]

I've heard the rear axals break first but what about over heating the gearbox/rear diff?

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[CSG Mike]

Originally Posted by Matt@Cosworth

Adrian at Fensport has been running our forged internals in his turbo race car for the last 8 months or so at about 480Bhp level
so we're planning on releasing these at some point in the near future

regarding a fully validated stage 3 set of parts 'may' happen but my bosses are looking to sell more stage 2 kits before embarking on a full stage 3 program

What kind of transmission is he using?

[ajc209]

Originally Posted by CSG Mike

What kind of transmission is he using?

Sequential.

http://www.fensport.co.uk/FensportCars/GT86_Race.aspx

[Matt@Cosworth]

Originally Posted by CSG Mike

What kind of transmission is he using?

Samsonas 6 speed sequential

and he's on uprated driveshafts and joints too, and I think on a plate type quaife diff

not much of the original drivetrain left now... so the power increase is probably genuine

be nice if he had some more competition in the championship really

[weederr33]

Originally Posted by Matt@Cosworth

understood

please note that there's not physically any room to fit a smaller diameter pulley on the nose of the SC than this new 10% smaller part

the next option after this will be to increase the diameter of the crank pulley and so increase the blower speed that way , this will involve machining off the stock ribs and sweating a new outer ring onto the stock pulley

Woah, that's interesting. Essentially instead of a smaller SC pulley, we'd upgrade the crank pulley? So with the 10% smaller pulley, would larger injectors and and upgraded fuel pump be required?

[ajc209]

You might also need to change the AC compressor and alternator pulley too, though they might be okay being spun a bit faster.

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