Bigpower

That was my target when I started to finally spend money modifying the car rather than just having to fix it - yes I've had a lot of bad luck with the car in the last 12 months including 2 engine failures.

But now things seem to be on the up :D:D (fingers crossed they stay that way). So below you will find details from my original project thread on SN (posted in Dec06), etc regarding my project and hopefully increasing my chances to do well in the Time Attack (as the bar is constantly being raised). I had 350bhp last year ( and in the spec below) - so target for 2007 is 450bhp - READ ON.....

Car is an STI 5 Type RA 555 WRC Ltd, with a built 2 litre which should be capable of running 450bhp all day long

I'll give a rundown on current spec, then list what I have acquired and what I think I will need to achieve this target. Any advice on other components that you would recommend would be gratefully received :thumb:

Oh and the car will be used mainly for track events including Time Attack

Car - STI 5 RA Ltd

Engine
Built 2 litre shortblock - STI7/8 cross-drilled crank, ACL Race bearings, H-Section forged rods, Mahle Powerpak pistons
STI 5 heads - standard
ARP head studs
RCM modified oil pump
Standard sump

Fuelling
In tank SX high flow pump (I was told it was an SX, but not sure they even make them - so I'll assume Walbro 255)
SX FPR and filter
Apexi 550cc injectors

Other Engine related
HKS FMIC
HMS Racing Suction inlet kit
GEMS ECU
MD191 Turbo
Oil Cooler - non thermostatic

Brakes
AP 4 pot 330mm front brakes
Standard 2-pot rear

Suspension
Leda B adjustable dampers with progressive rate springs - recently rebuilt and new springs
Thicker antiroll bars front & rear
Anti lift kit
Cusco under body brace
Poly bushes all-round
Solid drop links
Rear subframe locking bolts
Front and rear strut braces

Wheels
Speedline GT1 Lites - 18"x7.5"


Recent acquisitions - not yet fitted
MD321T Turbo with 3" samco inlet pipe
740cc injectors
HKS tubular headers
APS 3.5" full exhaust system inc downpipe
Apexi AVCR

Other parts I know I need and plan to get
Wideband AFR
Parallel fuel rail mod
Bucket seat and harness
Tyres - Yokohama A048 - 225/40/18


Finally - ideas that I think will benefit my plans
Swirl pot with external pump - so in tank (lifter) pump feeding swirl pot then Bosch 044 (or similar) feeding fuel line
Baffled/ Winged high capacity sump
6-point bolt in rollcage - to aid car stiffness as well as extra safety
Custom cold air intake - to feed under bonnet custom made enclosure for air filter - this could be achieved by removing headlight to aid airflow, or come from driving light surround
Solid, adjustable topmounts so I can dial in extra castor at front and extra camber front and rear
Brake support bracket


I would appreciate any comments you have on my plans - especially my thoughts on the final section. I aim to have all the parts fitted and remapped by mid Jan - till then I will go on buying parts

Cheers and Merry Christmas

Terry

So that was the start of this project, then after the turbo, injectors, headers, etc were fitted and remapped.......




I would like to thank Pat Herborn and Simon Roe who both made themselves available today at Surrey Rolling Road. Also to Charlie (owner of the RR) and Mark Aigin of Lateral Performance who organised this day. Oh and of course Len and Mark at Subaru 4 You for all their hard work fitting the parts

Basically I met up with Simon (Jolly Green Monster) before going on the rollers, to give the map a fine tune. I have had NGK 8 spark plugs fitted and filled up with V-Power and a little octane booster. So once the map was tweaked and the car was peaking at a healthy 1.9 bar we went on the rollers (mapped on the road of course )



The run was done in 4th gear and with the lesser loading on the drivetrain the boost will not come on strong as early as in 5th. Also I have an H&S 53mm up-pipe, which Pat said was a lot bigger than necessary for this level of power - he recommends about 45mm or thereabouts - so this also affects spool.

In 5th gear on the road it hits peak boost at 4k rpm - on the rollers it is happening in 4th at 4.5k rpm.

It may look a little laggy, but with the short ratio RA gearing, it does not feel laggy and the acceleration is just blistering :D:D






As you can see the car peaked at over 1.9 bar on the rollers and held 1.8 bar to well over 7krpm - which is what it does on the road - so a very well set up RR


This turbo (MD321T) is an awesome bit of kit, considering it is a standard position fitment

So there we have it. Target achieved - now just a case of lightening the car a little and getting enough practice in on the tracks this year to be competitive in the midst of 550bhp and 650bhp cars in the TA Club Challenge

Cheers

Terry

Superb results there Terry - really shows the potential of that Turbo well along with great mapping skills

Bet you cant wait for TA to start :thumb:

great figures mate and an impressive spec list
good luck with your TA :thumb:

very impressive... i see from the TA competitor list that we have a lot of cars hitting the 400+ mark......

I hope i can keep up with you...... :-D

Nice results Terry and a decent thread with results that are backed up~ spot on :thumb:

I can only imagine what the power feels like with short gearing and a lowish kerb weight. Very best of luck for this years Time Attack, power isn't everything when it comes to circuit driving but then you already know that

Cheers Guys

It feels awesome - I can't really imagine accelerating much faster in a road car - the mind boggles when thinking what 650bhp must feel like.

There are some very powerful cars in the TA Club Challenge class. Look at the Impreza's on the list already and out of 9 Impreza entrants mine will be 7th down the list in power terms..... (well should be if peoples cars get built the way they ought to).

So it's a good job there is a mix of tracks, as the likes of Silverstone and Donington will suit the higher power cars, whereas Knockhill and Brands Hatch Indy may not give the higher power cars such a big advantage.

I heard Robbie Thornton in his GTR struggled to use all of the power so you may have a valid point. Never done Knockhill but after viewing loads of incar vids, I would have thought you'd struggle to use more than 500 around there in anger. I suppose a sponsored racer may fare better with no hangups about mullering the car but privateers don't have that luxury....time will tell.

How did you find your AP's Terry? I take it you're using different pad and discs now?

Stunning results there.

450bhp in an RA... sod that

nice work terry good luck with TA :thumb:

Great stuff Terry...........sounds like a missile :twisted:

Best of british for the TA this year 8)