Rebuilding the Subaru Engine....

[Shaun@TDI]

OK - Update,
it's now been on the dyno again and we've made some further changes to the set-up. It's now been re-mapped for the new exhaust system. We've also managed to eradicate the missfire issue too - this was simply a case of running more dwell time (charge time) for the coil pack via the HKS F-Con ECU. Whilst this has cured the problem, it may hasten the demise of the coilpack itself but i was prepared to buy another one anyway. It simply means that i wont have to do this straight away anymore.
She now has 316.5 bhp and 276.4 lb/ft of torque at the hubs. This means that losing the restriction in the exhaust has given me another 11bhp but lost me 8.9 lb/ft of torque. The reduction in torque is entirely deliberate because now the torque can be kept up for longer, resulting in the higher bhp. As for the restriction before the turbo, this will have to be solved another time.
In its current spec, i cannot raise the boost any further as we are now getting very close to maxing out the injector duty cycle. Apparently, i should have 555cc Nismo injectors although that is now looking doubtful, because if they were then i'd have more more fueling capacity than i do right now.

Shaun - Subaru Impreza GC8 1 (Medium).JPG

Shaun - Subaru Impreza GC8 2 (Medium).JPG

On another note, i've been recently looking into grafting alot of Subaru technology onto the VW Beetle I also own. Watch this space... lol

[swampylancer]

What ya thinking

[Shaun@TDI]

something like that...

7169 (Small).jpg

imagine this, but with a pair of turbo's rather than the one - lol

[deano]

very nice lol should be quick then

[swampylancer]

What bhp does that produce with the one turbo then shaun

[Shaun@TDI]

Should be pretty good at the 300bhp mark, but the exact details of the kit havent been finalised yet. I wont be starting it until the summer anyhow.
i may start another thread about it (since it'll be using alot of Jap technology) but we'll see....

[swampylancer]

Should be pretty good at the 300bhp mark, but the exact details of the kit havent been finalised yet. I wont be starting it until the summer anyhow.
i may start another thread about it (since it'll be using alot of Jap technology) but we'll see....

Sounds like ya gonna have a buisy summer shaun

[xxcharliexx]

sounds all very gooooood

[swampylancer]

Any update on the VW yet matey

[Shaun@TDI]

not yet - things aren't going to happen for a few months.

[swampylancer]

not yet - things aren't going to happen for a few months.

Only a few

[Shaun@TDI]

GRRRRR!!!
The coil pack has now finally given up the ghost. After prolonged periods of hard driving, i cant run any more than actuator boost pressure (0.8bar) as the coil pack suffers massively from heat soak and gives up on me.
The plan now is to look into switching the car over to either an uprated coil pack or running individual coils like the earlier subaru's do. Ideally, i'd like to keep the single coil pack as it means less modified wiring, plus i know that i can purchase some seriously powerful coils from companies like ACCELL or alike.
The standard Subaru coil pack is £297.00+ vat and pumps out 29,000 volts
An uprated ACCELL unit costs $69.00 and pumps out 47,000 volts - almost twice as much at a fifth of the cost! The only real downside is that i'll have to have custom leads made to suit the application but i've already spoken with the guys at Magnecor and they say its all possible.
All i know id that driving it around at 0.8bar is fun but its not a patch on 1.4bar....