What does it take to get reliable 500whp?
 

Hi guys & girls

I know this type of question gets asked often and I have used the search function to take a look at the various options but as with most things, it's just easier to ask the question and look at the answers :thumb:

So, quick background, I'm a Brit living in Canada and I've got an itch I want to scratch, and that itch is to build a nice 22b replica.
I have procured a nice 2.5RS coupe and have had some metal wide arch wings/fenders sent out to me so the car part is sorted.

As for the engine, as the title says, I'd like to have reliable 500whp but the end figure isn't massively important.

I thought as a good start point, an EJ22T engine would be good, so I have just got one of them.
I have been offered a deal on a stroker kit from an engine guy across here who is known to build some good engines.

So, first question, do you think this is a good way to go?
Second, what are the best heads to use in this build?
The question of turbo to use seems to be very subjective. My thought process is I'd like something that spools up reasonably quickly but past that, I need more advice!

I will be looking to start a build thread but thought I would get it started here as I'm guessing there will be various ideas/suggestions :D

I look forward to your thoughts :thumb:

A few initial of the top of head thoughts
1. Build it for 600whp. Then map it for 500whp
2. Closed Deck block
3. The quality of the Machine work is as important as the build
4. Look at it holistically and build a car, not an engine. The Suspension, Braking, Drive train and Engine should all work well together.
5. How will you use it? Track? Road? Drive it hard, carefully ect? and build for that too.

So I would sit down and think about how you will use it and spec out the car as a package not just the engine.

Speak with EngineTuner or Nick at Advanced.

500wbhp is uk flywheel so 500bhp is pretty second hat nowadays.

But thats said, what are your plans for it? track car, road car? have you ever driven a 500bhp car before?

What do you need for a reliable 500hp?






Money.


Lots of it.

my build for you pal

https://www.scoobynet.com/projects-4...i-project.html


Ryan

How do you work that out?
So, we're talking 500hp at the wheels, which given the efficiency of Subaru's all wheel drive system, requires roughly, 610-640 at the crank (not exact figures as there are arguments on the efficiency question ;))
So how does that equate to 500hp flywheel figure??

Thanks for your answers, as I put above, this was just to get going on ideas for engine to start with but I take on all your points, thanks once again.

Yeh, guess I need to work more :thumb:

Nice one Ryan, thanks for the link.

Just read the whole lot, start to finish!! :eek:

Man, you change your mind a lot :lol1:

Good to see that is similar to what I'm thinking about. Think I might end up 'borrowing' some of your ideas :thumb:

Another quick question to ask, what are the best heads to use on this build?

AVCS with lairy cams, +1mm exhaust valves along with the springs retainers etc

Give me a shout if you need any help pal. Just remember the little things add up massively. Fuel fittings, braided fuel lines, stuff like that. New clutch and fly wheel has just cost me £900.

Ryan

The following got me 666bhp on 99ron + 20% meth

EJ22T block
EJ257 79mm nitrided crank
Wiseco stroker pistons
Crower stroker rods
ACL main and big end bearings
Cosworth 12mm high flow oil pump
14mm head stud conversion
avcs heads ported and knife edge polished
1mm oversize Cosworth Inlet and Exhaust valves
supertech titanium retainers
supertech double valve springs
supertech valve seats
272 inlet and exhaust cams
Adjustable exhaust cam pulleys
Kevlar timing belt
cosworth billet timing belt guide
Cosworth high flow inlet manifold
bespoke top feed fuel rails
Injector dynamics 2000cc Injectors
Aeromotive A1000 fuel pump
fuelab -10 fuel filter
SM swirl pot
walbro 255lph lift pump
braided clutch line
Exedy hyper twin plate clutch
RCM 100mm trumpet
RCM 260mm Induction cone
Inner wing induction box with 76mm feed to foglight
Beatrush gearbox stabiliser
STi engine mounts
GT spec headers
3.5" rotated down pipe
44mm tial external wastegate
Roger clark return to sump catch can
Braided teflon fuel hoses
Scoobyclinic Garrett Billet GT35R
Custom header tank
STi 1.3bar header tank cap
2007 UK long ratio DCCD 6 speed gearbox
R180 3.54 plated diff
Bespoke braided engine loom
Roger clark lightened pulleys
DEI Titanium turbo blanket
Omni power 4bar map sensor
Odyssey PC680 battery
Fuel lab 3 port fuel pressure regulator
Power steering reservior relocation kit
twin scroll baffled sump
Syvecs S6 PNP ecu with 8 maps, Anti lag, Launch control. flat foot shifting and nos control
STi quickshift
ASH silicone hoses
Summit racing radiator flow panel
3.5" veilside titanium exhaust
wideband lambda fuelling control
NGK Racing 8 spark plugs
New age coil pack conversion
Reverse mounted radiator fans
Turbosmart 3 port boost solenoid
White ceramic coating on all exhaust pipework
NGK racing 8 spark plugs
Millers CRX 75w140NT gear oil
Aeroquip power steering hoses
Hyperflow monster intercooler

Jeez Banny that like as long as a shopping list for Tescos :eek: except a can of beans cost £800 a loaf of bread £150 toilet rolls £300 etc etc ;)

its a different rating, US BHP is different to UK BHP :thumb:

No mate, 500wbhp is at the wheels no matter where you are.

Flywheel hp is a calculation from the dyno, Wheel hp is a direct measurement.

So if you're after 500 @ the wheels you're looking at 560+ fly

ok you carry on then :thumb:

Go on then, do explain how it is different :thumb:

Tidgy is having an RS moment.

metric and imperial HP are different ;)

Go on then, got any information?

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

http://www.kylesconverter.com/power/...ric-horsepower

The second one is a quick calculator that shows the difference but if you type in 500, the metric equivalent is 506.93!

So,not a lot of difference!!

But I'm pretty sure we use the same BHP here as you guys do? :wonder:
I'll endeavour to find out anyway :thumb:

you'd be gutted if you got 500 metric and not imperial ;)

I'm pretty sure I could live with the 6hp difference :thumb:

I've just been over on the NASIOC website, section factory 2.5's, re a thread, 'experiences of a Blouch 440xt on a '12 wrx'.
Contributions come from '09, '11, '14 year wrx's with this turbo.
Figures quoted range from 344 to 365 whp. Metric or Imperial that converts to nearly 440hp at the crank. You wouldn't run that sort of power on standard wrx's here without serious risk of engine damage, so either the US 2.5 is specced a lot better than the UK or we aren't reading from the same sheet.
Trev

So, I'm just bringing this up from the dead as I'm actually starting to talk with a friend about building this engine.

Other than the spec from Banny there wasn't much technical information on a good route to go?

My guess would be a lot of guys have built motors since I first asked so would be very interested in specs and results if you don't mind?

Many thanks :thumb:

Probably a bit more than that even . 500@ wheels would be over 600 bhp .

To the OP. Please ignore RaggedRaggy, it's a second account for a well known forum troll Fawor who knows nothing and just comes on here to abuse people. Hopefully all his posts will get deleted again today and this new account too.

As it turns out I didn't get to see it but thanks for letting me know :thumb: