Modified foresters Perth and Australia

[NachaLuva]

I have 90% decided that I will be ordering a Raptor Supercharging system for
the foz.

I think It will more than make the extra low end power and torque that I need, and apparently the instal is easily doable at home

Make sure you do your research before committing, esp with the installation. You may have to move things around in the engine bay, make custom brackets, etc to get it to fit in.

Taza & Davidov started playing around with this, you could PM them for more info :iconwink:

Also, read this, bit long but good info for you:
N/A Supercharger Project x2

 

[massni94]

I've been in contact with Tim from Raptor Superchargers who has been extremely helpful. The only thing stopping me apparently to him is the tumble generator valves. Has anyone here performed a tumble valve generator delete?

 

[NachaLuva]

The only thing stopping me apparently to him is the tumble generator valves.

Tumble generator valves explained:
https://drive2.subaru.com/Win03_Manifold.htm

I dont think yours has TGVs but I may be wrong. They seem to be only USDM WRXs
https://www.subaruforester.org/vbulletin/f87/tumbler-generator-valve-tgv-12875/

Has anyone here performed a tumble valve generator delete?

https://www.scoobymods.com/showthread.php/mod-tgv-tumble-generator-valve-4371.html?

 

[Davidov]

[ame="https://www.youtube.com/watch?v=hX26LN-VMjI"]Subaru Liberty (MY08 2.5) SUPERCHARGED by Raptor Superchargers - YouTube[/ame]

[ame="https://www.youtube.com/watch?v=fwoutjPbYAc"]Subaru Outback MY08 Supercharger upgrade dyno test results - YouTube[/ame]

Went from 91kw/180Nm ATW to 147/253NM ATW. That is HUGE.

I'd recommend the raptor kit with the intercooler, as ramming hotter air will reduce the reliability and the power you will make.

I'd also recommend getting it ecutek tuned or similar on a dyno just to ensure that it won't kill your motor and to get the most out of it.

 

[NachaLuva]

There was a guy on Rexnet who did this to his WRX & was very disappointed. However, he started with a turbo, so was unlikely to get more from the Raptor supercharger than his existing turbo, plus his application is entirely different. His was for the street so high end horsepower (showing off, street races, burnouts, etc...general hooning!). Yours is for offroad & reliability so the low down torque of a supercharger is much better.

+1 to get a proper tune done after the install, perhaps a good place in Perth could be recommended

 

[Rally]

If I only had 147kw at the wheels after spending that much money, and I was after performance, I'd be hugely disappointed. I probably have spent less money on my WRX and I have substantially more power than that. And mine is built for motorkhanas, where low end and mid range is more critical. Nachaluva, on the street torque rules. Horsepower is for drags, circuit racing and dyno queens.

 

[Ratbag]

Gidday Rally

I agree.

The main difference between a supercharger and a turbocharger is that the boost from a supercharger is constant (assuming that it's belt driven with no electric clutch etc).

Basically, a supercharger with a 7 psi boost will give a 50% increase in both the KW and the all-important torque figures at all rpm. This figure has to have the supercharger's power requirements drawn from the engine deducted from it - usually around 10 HP for a 7 psi boost (about 7.75 KW). A SC has little, if any, drag from the maximum torque figure for the engine.

A SC with those specs would give Roo2 around 180 KW (173 KW nett) and 340 Nm torque at the relevant rpm for each.

SC engines have far more grunt down low than a TC engine. Upper rev performance is usually tailored by adjusting the boost to the optimum for the engine (by changing the SC drive pulley diameter ... :iconwink.

 

[NachaLuva]

Nachaluva, on the street torque rules. Horsepower is for drags, circuit racing and dyno queens.

I totally agree but I can just imagine the storm that comment would create on a forum like rexnet where "dyno queens" rule lol :rotfl:

 

[Rally]

I don't really look on ricenet unless it is to buy or sell parts.

 

[Biesel]

The raptor kits are also centrifugal type blower. These do not product low end instant boost the roots or twin screw type blower they are more like a turbo.

 

[Rally]

I know bugger all about superchargers, but it seems that this raptor kit provides neither the low end grunt expected of a supercharger, or the power of a turbo. Begs the question, especially with so many turbo Subarus out there, of why bother.

 

[Ratbag]

I agree, Rally. Except that this isn't the case.

Standard type superchargers are nowhere near as efficient as exhaust gas driven superchargers (aka. "turbochargers" ... ), but also do not suffer from turbo lag and low rpm inefficiencies.

While hardly the last word on this, the Wikipedia article offers a better understanding of the differences here:

https://en.wikipedia.org/wiki/Supercharger

Here is a pretty serious one :lol: :