Hi all, would really appreciate some input from you on this one. I have a good friend of mine in Europe who has just got this car with a blown engine and wants 600hp. I figure most of the stuff he needs, or should have as follows

Air filter
stainless manifold
cat back exhaust
Profec B boost control
ECU
dump valve
spark plugs
front mount intercooler
turbo kit - suggestions please
2.2 stroker kit crank, rods, pistons
oil cooler
camshafts
pulleys
fuel pump
clutch
injectors
what else?

tein suspension
cusco braces
cusco arms

Anyone been here and done this that can help with first hand experience?

cheers in advance

Dan

 

Bigger brakes might advisable!
Does he want it to be fairly reliable? I know it sounds a daft question, but if he does, it means spending a lot more dosh!

 

Speak to Harvey, his car had at the last count, got around 585bhp (and still a 2ltr! )

Tony

 

The GT35R is rated by Garrett as a 600 BHP turbo. There are some threads on NASIOC with GT35R dyno plots on 2.5 engines at different octane levels. These will give your friend some ideas what sort of fuel he might need, and what sort of spool up he might expect. As well as being challenging on spool up and octane, the smaller engines will need to be able to rev quite high to support this unless you use nitrous to spool up the big turbo. Clutch and gearbox may need careful thought. I think David Wallis and Adam M have used GT35R variants and would be able to assist with more data.

 

1. http://www.rogerclarkmotorsport.co.uk
2. http://www.brdevelopments.com/
3. GBP 20K

 

for that kind of power i would add lateral performance to the list.

Christian's car managed 595bhp and 621lbft. don't recall any non nitroused cars in the UK getting near those figures.

 

Yeah he'd like it to be reliable. It's not gonna be ragged every day but anything that will lead to better reliability is worth looking at I think. It's his choice then as to if he throws the extra cash at it or not.

What engine components am I missing from that list?

and yes, brakes will be sorted with 6 pot Project Mu's

 

Good Man!

 

forget 20k.. more like 25 -30k if using new parts and paying for labour.

Stroker kits arent the only option..

I have a GT35/40 Hybrid and id be confident of it achieving 500+ hp..

There is no need for 600hp though.. I wish Id realised that years ago

David

 

and "he wants 600bhp" are not really compatable in my opinion on a Subaru 4 cylinder engine. Not if you are actually going to use it, as opposed to having it as a nice ornament

Andy

 

I would suggest that your friend try driving even a 450hp car before deciding he needs 600hp. ANd I agree with Andy, 600hp and a subaru motor are really for racing applications only.

Paul

 

wow.. we are all agreeing

David

 

ME TOO......

600bhp (true) + reliable, don't mix too well.

Mark.

 

Add to the list a "closed deck & re-linered block" and an upgraded ECU to keep things under control

 

The Newbie doesn't agree ....... yet

 

Andy, I do agree, 600HP based on a road car / reliabillity factor is way too much but for track only, demo purposes then it will just have to do

 

Could easily be conrod on the racing line

 

PMSL

 

pop goes the scooby

 

lol.... Sorry chaps, that jokes old hat, heard it a million times during my bike racing days

 

Right, taken on board your comments, cheers.


Have now spoken to him and he's playing ball with the more realistic 500hp figure.

I've heard about this closed deck etc but that's all, just heard about it. Would someone care to explain a little more to a cheque book mechanic please

Also interested to see if he should go 2.2 or 2.5? I guess 2.5 would be more torque-y (like that's a word lol)

cheers guys

 

Or somewhere in between such as 2.33. This uses the closed deck block (stronger with piston oil cooling sprays) from the 2.2 and the crank from the 2.5. The thicker walled 2.2 closed deck block seems to be capable of higher boost pressure/power in standard form before running into head gasket or liner problems.

Andy

 

actually conrad didnt, agree, he said 600bhp wasn't necessary, he didn't say it wasn't reliable.

I will agree that i don't think it is reliable either. Personally I say smaller turbo, better response, and 450 max of each.

agree with andy re the 4 cylinder not being up to it long term.

Not so worried about mine due to its ornament status!

 

Well I've told him a rough guess of what the parts are gonna cost him to do the engine, plus then he needs the induction, exhaust etc etc on top and make it corner and stop Don't normally deal with scoobs so it's all new to me. Just gotta see if there's anyone out there that can actually build it for him if we send him the parts......

 

IMHO you will be much better served getting a package, or buying parts that the builder has experience of. Sending someone a load of parts, chosen because they are the cheapest, or easiest to get hold of may not give you what you want in the end. I would at least try to go with proven parts in critical areas, such as block, pistons and clearances.

Paul

 

cheers, the parts certainly won't be chosen for any other reason than they're proven to work and are the best or best vfm available. No part is hard to get unless the manufacturers don't have them ever, which does happen sometimes.

 

Adam, splitting hairs???

Based on facts Adam, how many 600BHP Impreza engines do you know of personally that have failed?????

Regards

Conrad

 

I would also be wary of just choosing lots of individual parts that are "proven". Try and find out what sort of application they were "proven" in. Not just the power levels involved, but also the type of application. One example is that some parts are proven in rally cars restricted to 300hp, this doesn't mean they have a place on a 500hp road car.

Paul

 

What, like the inlet restrictor?

 

Obviously I'm waaaaay out of touch guys but, I was at the Autosport show the other week and the GGR stand caught my eye (which was a surprise in itself, being GGR ). They were advertising a "package" whereby you give them your MY02> STi and GBP 20k and they give you a guaranteed and warranted (12,000 mile) 500/500 based on the EJ257.

You've probably already discussed it and I missed it (not hard these days with my virtual zero Scoobynet visiting time ) but it might be just what Mr Chequebooktuner is looking for?

Just a though,

Matt