rebuilting my engine, looking for about 400 - 450 bhp, depending on what boost i run.

what do i need, currently got a vf22 turbo, dunno if it will make that sorta power.

rebuilt will take a few months, got £1000 to start and 250 pm starting 1st july.

just looking for tips on what i need. order to fit them.

dont mind rebuilding, running and addeding things on as i go 2 hit my power target.

cheers

 

VF22 wont cut it......turbo wise a lateral performance MD321H or T depending on target will get you the figures you want and what the spec of rebuild is.

 

md321t will set you back £1500 alone, then you need a gearbox, FMIC, uprated fuel injectors, stainless steel headers, aftermarket ecu depending on what year car you have !! plus quite a few other mods

 

the list goes on and on

 

what gearbox you running steve ?#

 

On a 2 litre engine, a bulletproof 400+bhp build will set you back between 6-10k,

depending on how much work you can do yourself.

Ns04

 

will be doing most labour myself, il be changing the crank, pistons, con rods, fitting exhaust, turbo, fmic etc.

its a wrx import 1998. its suffering from mild piston slap

if i uprate the bottom end with forged pistons and rods, re crind crank. fit a apexi ecu, fmic and exhaust, headers and up pipe,upgrade inj to 550cc, fuel pressure reg and fuel pump, induction kit, what sorta power would i be looking at using vf22 turbo, and could i still run the car.

would a td05 20g cut the cloth?

then add the other mods as i go.

what gearbox would i need with the above mods.

any help will be ace. starting rebuild on 4 weeks.

so looking to create a timeline based on cash flow in.

would love to build and still run if possible adding as i go, dunno if thats recomended.

 

IMO the 2.0 suffers from low end torque problems with larger turbo's.

If it was my rebuild, I'd get a brand spanking 2.5 STI block with pistons etc for about 1500, change the pistons only instead of rebuilding a 2.0 block (especially as you need new pistons, rods and a crank as well (is your original crank bad?)).

You still need turbo, injectors, gearbox, clutch etc etc of course, so it will still be expensive, but probably not more than rebuilding a 2.0 anyway, and you get a brand new block.


Edit: worth speaking to mark at lateral performance also. One stop shop for all your bits if you're doing your build yourself, and he seems to be completely on the ball

 

That has crossed my mind a 2.5 block. will the heads bolt directly back on then. id have thought the 2.5 block would have larger ports than the 2.0 head , so losing power. wouldnt it run more 2.3 than a 2.5 in that case.

 

The heads will bolt straight on or u can get the chambers opened up to much the 2.5 bore like i have done
As said u will need a gearbox, either a 6 speed from a newage STI or 5 speed with a PPG gearkit.

 

i would go the 2.5 route also even in standard form with the right turbo and injectors, intercooler,ecu etc it will get around 400bhp reliably

does the piston slap go away when warm? if the car wasnt losing any oil, power and a compression test showed it was healthy i would just live with the noise as alot of people have drove for years with piston slap and never had engine failure.

 

If you re-grind the crank, expect to rebuild again not long after you complete this one!!

Don't re-grind a Subaru crank!!! Bin it, get a new one.

Agree with suggestion above that 2.5 may be best option for 400 on a budget.

With all due respect mate, I strongly suggest you speak to an Impreza engine building expert such as David from API before you make any expensive mistakes!

Ns04

 

Budget £10k as a minimum to achieve a 450bhp car with a decent engine build, gearbox ,clutch, brakes, suspension etc. You will need alot more than you think.

Andy

 

mje - might be worth checking out my 'Budget DIY rebuild' thread over on Projects. I'm in a similar situation to you and funding everything as I go, doing as much of the work as I can myself. It's not quite a rock-bottom cost build any more, because when you're doing the build yourself it's very tempting to go that one step further and 'future proof' your engine - or at least that's how I justify it to myself! If you're careful with where you shop you can get the parts you need at good prices almost matching what it costs to buy stuff cheap direct from the States. I'm getting my engine parts from CDF Racing. For your power aim you're looking at a TD05/06-20G or an MD321H/T depending on 2.0 or 2.5. Feel free to PM me about it if you want, the whole reason my thread's up there is to help out fellow SNetters who are in the same boat and want to try their hand at their own build without the 'open chequebook' approach.

 

Mine is a 6 speed gearbox, but 450bhp will definately kill a 5 speed gearbox

 

If thats the turbo you have bought for the car and money is the main thing?? Just get the car mapped up on that turbo, I'm sure it will still be a quick car and you can change the rest when your finaces allow you to

 

that turbo is currently on my car, was wen i bought it.its in standard form to me at the mo. it had dump valve on it n thats all i knew. My mate who also has a impreza then realised its has the yellow inj and sti 4 pot brakes. also think a vf22 wasnt standard on a wrx.

ive got a boost gauge turnin up monday, so im gonna see what its running because i dont kno if there is anything else done to it that im unaware of. also got fuel air ratio gauge on route.

 

View my scoob for my spec, i have only just squeezed 400bhp and its cost me circa £4.5K in parts alone.

Im using the forced performance green turbo, a new one to the market and my tuner was impressed with it.

BEar in mind im also still on a standard box too....

 

Agree with the suggestions to go with 2.5, I have a MD321T turbo on a forged 2.0, wish I had gone with the 2.5 now.

Next year I may go up to 2.5 along with SIMTEK or similar.

 

my choice for 400-450bhp would be, EJ20 closed deck block, EJ257 Crank, Forged Pistons / Rods and a nice MD321h or GT30 rotated setup... 2.2bar all the way to 9k revs

 

Do not agree...... I have ran a rotated gt30r on a 2ltr and a 2.5ltr engine and I have to admit I liked it far far better on the 2ltr. There was a little more lag but once it came on boost the hit was far better

 

To be fair, I have not driven a 2.5 at all yet so you might be right, don't get me wrong, when its on boost it becomes a lunatic car.

Its just when coming off roundabouts and the like, you have to wait for the boost.

 

hi all my trackcar is in for a 400hp build, its got woosner oversized pistons, eagle rods, cosworth gaskets and bearings, gt2871r turbo and 740cc injectors.

should make low 400s on a standard ra box luckily i have a spare

 

Definately have a word with Mark at Lateral, he's really helpful. I ordered the new MD321H turbo off him aswell as GT Spec headers, 550cc Power Enterprise injectors and loads of other bits. I've just spent £3600 and i'll be taking my scooby to around 400bhp. If you want 450bhp your going to spend alot more than that! I'm doing all the work myself, but if a specialist was doing it you could easily double the cost depending on how far you want to go.

 

I now have a bigger turbo on a 2.5ltr but that is what gears are for If I come off a round about in a gear that puts me on boost it gets quite fun But if your going to show off your gonna be in 2nd/3rd anyways

 

Even when in second it can take some time, there is quite a bit more mappin to be done, so hopefully that can be sorted.

 

I don't believe you ??? on your md321t it must be fun , If I came off on roundabout in 2nd gear on my turbo its


Oops just seen your sig and i thought you were on an md321t ??? maybe my gt35r makes the idea of how good 2nd gear is..... is a little err well a waste of time

 

I'd look at re-specifying the overall package; the MD321T can work well on a 2.0ltr but you really need the variable inlet cams of the STi to get the best from it. The higher rev limit also helps.
IMHO you should look at increasing capacity (big expense) or downsizing the turbo, this may sound like a backward step but you could recoup a fair amount of the cost from the sale of your 321T and although the overall bhp pub talk figure may be a little less the gains in response will see your car ultimately faster.

FYI my 2.0ltr STi with a T ran 430bhp/400ftlbs with a splash of NF.

Good luck in getting it sorted

 

I was thinking of stepping down to a MD321H, maybe make for a better road car, either that or like you say increasing the capacity. Will see what the funds have to say.

Also I want to see what it feels like after it's mapped. - eventually

 

For a road car I think the 2.5 can't be beaten , forged of course for long term reliability...If you wish to concentrate on track use then stick to 2 litre..
Have a look at the new MD555 from Turbo Dynamics featured in this months Total Impreza and the MD321T from Lateral...Both very good turbos and will make excellent power with minimal lag..
One stock engined Sti8 I look after has made 455bhp and 410lbft on the one from Turbo Dynamics with 10% meth in the tank .....
Hoping to try one on my 2.1 stroker very soon...!