400 - 450 bhp rebuild
#1
400 - 450 bhp rebuild
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
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
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#7
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.
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.
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#8
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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
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
#9
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
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
#10
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As said u will need a gearbox, either a 6 speed from a newage STI or 5 speed with a PPG gearkit.
#11
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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.
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.
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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
#13
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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
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
Andy
#14
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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.
#17
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.
#18
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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....
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....
#19
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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.
Next year I may go up to 2.5 along with SIMTEK or similar.
#22
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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.
#23
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
should make low 400s on a standard ra box luckily i have a spare
#24
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.
#27
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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
Last edited by stevebt; 21 June 2008 at 12:06 AM.
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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
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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
Also I want to see what it feels like after it's mapped. - eventually
#30
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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...!
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...!
Last edited by MartynJ; 21 June 2008 at 11:00 AM.