Hatch Supercharger progress

aussie_bob · Post by **aussie_bob** » Mon Apr 25, 2011 5:55 pm

El_Freddo wrote:Its a toyota SC14 supercharger. As to the exact model(s) it comes from I'm not sure.

You can also do a search for raptor superchargers - off the shelf bolt on DIY kits from memory.

Cheers

Bennie

yeah i was looking at raptor sc but very expensive, was even considering talking to a few engineer mates about how to make a gear box to speed up the spool on a normal turbo which is pretty much what raptor sc uses. dont know if it would be cheaper in the end which is why i was interested in the sc you've using

YouTube · Post by **El_Freddo** » Mon Apr 25, 2011 8:18 pm

aussie_bob wrote:...i was interested in the sc you've using

I'm not running one, but have been talking to Subarino about his setup as I have considered the same - but have other things to attend to first.

Pipe dreams.

Cheers

Bennie

aussie_bob · Post by **aussie_bob** » Sat Apr 30, 2011 12:38 pm

El_Freddo wrote:Its a toyota SC14 supercharger. As to the exact model(s) it comes from I'm not sure.

You can also do a search for raptor superchargers - off the shelf bolt on DIY kits from memory.

Cheers

Bennie

would this sc be compatible with an ej20??

shouldn't make that much difference should it?

YouTube · Post by **El_Freddo** » Sat Apr 30, 2011 10:16 pm

aussie_bob wrote:would this sc be compatible with an ej20??

shouldn't make that much difference should it?

Dunno mate - I'm not an expert on this, nor have I done the work either!

Best to contact Subarino after reading his original post about the install.

I do know that you can change the pulley on the SC to change the boost pressure level, its just a matter of trial and error!

Cheers

Bennie

BaronVonChickenPants · Post by **BaronVonChickenPants** » Sun May 01, 2011 5:59 pm

aussie_bob wrote:would this sc be compatible with an ej20??

shouldn't make that much difference should it?

Yes it would work but it would be a matter of sizing the pulleys to achieve your desired result.

Using the same ratio as Hatchie has would result on higher boost on an EJ20, I remember doing the figures with Dave when he was first trying to fit this to hatchie.

The SC14 didn't have the beans to run any useful boost on an EJ25, at best you would achieve 2psi before over-running the supercharger.

From memory Dave ended up with a 103mm pulley on the SC14 and 130mm crank pulley, resulting in ~7.5psi of boost, the same setup on a EJ20 would give ~9.5psi of boost, this is all mathamtical theory, actual results would depend on flow restriction, throttle body, intercooler, intake pipe lengths, etc, etc.....

Jordan.

spike · Post by **spike** » Sun May 01, 2011 7:43 pm

depends what you want to do with it

there is a system that gives the best of both worlds, a turbo and supercharger that F1 trialed in about 1980s i think (1.5 turbo era)

using an electric/hydralich clutch to switch between an exhaust turbine above 10 000 and super charger below that level