stevenuk300 still

iTrader: (1)

Mine is now around the 290bhp mark, and was just interested to know what is the most powerful UK300 around and what has been done to it. Really I want to keep with the standard gearbox, so also whos got the most powerful UK300 on the standard gearbox?
Need to squueze some extra horses out still

Bat-Fink

Think i remember a 320 one

Neilo

there was one that had a 2.5 conversion running over 400 IIRC.

pippyrips

don't know but does anyone know where my old uk300 is? number 301

FragaL

iTrader: (1)

Anyone know where my 264 is? Sold it in Bristol about 6months ago. Can't miss the plate U K300 PPP lol

WRX_Rich

iTrader: (5)

http://bbs.scoobynet.co.uk/member.php?u=3844

rb5scott had the best 300 I have seen

alloy

Is a UK300 not the same as a WRX engine and drivetrain wise

Neilo

yes, the exact same. Just a special trim level.

Scooby400

That is now my car!!

Not sure what power its running, somewhere between 400 and 450 I imagine.

WRX_Rich

iTrader: (5)

good buy

how long have you had it?

any problems ?

Scooby400

You could say that. There was a piece of Scotts TD05 floating around inside the engine.

Rebuild.

hades

Scott's car went through various guises, with the 2L engine IIRC he was running mid 380's bhp (at two different rollers) before he fitted new headers, got another remap, and holed no 4 piston on the way to a RR day to find out if he'd cracked the 400 mark. With a hole in one piston and running like a dog it still made 346 (IIRC) on PE's rollers. It then did grow a 2.5 conversion, but there were problems with that. I did lose touch with the car around then as I moved away from being 100yards down the road from him!

I can't remember the exact sequence, but he did manage to destroy 3rd gear with the 2L lump before that broke, and then upon getting a better gear set IIRC he knackered the rear diff. He was also running an uprated clutch (Exeedy from memory)

However, as Rich said, great car when it was working well, although I only once drove it and not for very far.

Scooby400

Well my new STi heads, wiseco pistons, STi crankshaft, STi manifold, steel con rods, competition bearing set, kevlar cam belt, and MD321T blower should make it pretty much bullet proof.

Scooby400

With an air intake temp of 52 degrees C, it saw 340.4 at the wheels. 337.7 lb/ft too. With a transmission loss of say 23% that equates to 441 BHP and 439 lb/ft of torque, on a HOT day.

You could say I'm quite looking forward to picking it up in the morning. Hopefully I'll see it through the day!

RB5SCOTT

It was ok when it was running The 2.5 was the worse thing i ever did to it, i should of stayed with a stronger 2 litre. But in the end after 6 years of Impreza ownership i'd had enough, bought a 150bhp MX5 Sport and had 10 times more fun driving that than a 400bhp understeering barge

RS Grant

Remember seeing that one for sale, or in the gallery..... was a big fan, that hasnt changed.


Cheers,
Grant

wilb

I thought the UK300's were blobeyes?

RS Grant

UK300's are Bugeyes
WRX300's are Blobeyes

HTH...


Cheers,
Grant

wilb

Ah! Thanks mate.

Scooby400

Well I made it through the day - just!

That car is FAST! Its pretty mental having all four wheels spinning whilst changing from 3rd to 4th!

So currenty at about 440bhp, I reckon I should see some more when I downsize exhausts. Bob Rawle has suggested a 3" all the way through to give me more back pressure.

He also reckons after 2-3k miles we could up the boost a bit more.

Neilo

Its still got thin cylinder liners though......its far from bullet broof.

Be careful, and dont get greedy with the boost is all ill say.

Scooby400

Yeah, I know.

Had it relinered, but I get what you're saying.

Neilo

i only say it cos im in the same boat

big turbo and low boost is the way forward

stevenuk300 still

iTrader: (1)

So at about what power output are people changing their standard gearboxes? Has anyone wrecked one due to too much power?

Neilo

many have.....i havent yet despite the abuse i give it but mines only at 355lbft at the mo.

hades

I'd say an "average" figure is somewhere around 330-340lbft purely based on anecdotal evidence. There are people who have broken them at around 300lbft (come to that, there have been failures at standard power, but they're rare), there are a few who have gone much higher and not broken them. Some of it is how you drive it, some of it is probably luck.

My "rule of thumb" would be that generally speaking a TD04 turbo won't give you enough torque to break things often, you'll probably be alright with e.g. VF34 or similar unless you've pushed the turbo very hard, but well tuned TD05s or bigger and you're trusting to luck and/or gentle treatment.

stevenuk300 still

iTrader: (1)

I was always a bit reluctant to push more than 300 bhp as didn't want to change the gearbox, but I reckon I could push a few more horses out of it safely. Any suggestions what to do next????

Already done
Ecutek remap
Full De cat Blitz exhaust
Ram Air induction kit

Will an STI Top mount intercooler free up much power?

Smurf2k

iTrader: (6)

I think p20spd has murdered a few boxes