dean_1991

iTrader: (1)

hi there,

my question is can an open deck block run 400bph

at the moment i have

open deck block
yellow injectors
aplexi/green maf induction kit
td05
straight through pipe no cats.
fmic
forge dump valve
uprated clutch
z4 ecu 4 plug not chipped..

im also going to go 5 or 6 speed dccd in a classic

can some one tell me what bits i may want to buy

many thanks

bigfarlz

iTrader: (9)

You'll defo need bigger injectors, and turbo!

dean_1991

iTrader: (1)

so its ok on an open deck. what can open deck handle also what turbo/injectors ??

MattyB1983

iTrader: (51)

Is the engine in OE spec ??

dean_1991

iTrader: (1)

OE ? the block is standerd , not sure what heads ive got i dont know how to tell what heads they are mate

alcazar

iTrader: (2)

Forged, it will be OK to 400.
After that, you shorten it's life.

Terminator X

iTrader: (7)

Original Equipment.

TX.

MattyB1983

iTrader: (51)

If the block is in OE spec then forget 400 to be honest mate.

happydude303

iTrader: (1)

the block will be fine the internals if standard will not take that for long before the rods span or the pistons let go

dean_1991

iTrader: (1)

ok cheers people if i buy... cosworth pistons and rods, acl big end bearings will i need to change crank aswell what crank do i need to buy cheers

TonyBurns

iTrader: (3)

To do it properly you will be looking at:-

Simtek £1200
Full rebuild £3000
Gearbox (6 speed) £2500 (5 speed ppg/scoobyclinc) £3-5000
Clutch £600+
Uprated turbo, a good top end new turbo will be £1600-2000, 2nd hand cheap n cheerful £600 (will affect the way the power comes in)
Uprated front brakes, £800
Bigger wheels for front brakes £400+tyres
Injectors (650cc) probably new and probably another 3-500 quid

Over 9k there and its not everything either, hence why people buy a £6000 new age STI and modify that.

Tony

TonyBurns

iTrader: (3)

If you are doing a full rebuild then you replace everything including the crank.
Standard subaru one is ok but the twin scroll one is better.

Tony

MattyB1983

iTrader: (51)

As Tony says, it is very expensive to build a 400bhp classic from scratch. And please don't think he is being over the top with his prices, he's pretty much bang on there. If anything I'd increase that number a bit for a good solid build.
You ODB will be fine at 400 with the right bits but If you decide to go ahead with a complete build then you may as well go with a CDB or SCDB for that added piece of mind.

RICHARD J

iTrader: (4)

In theory your ODB will handle that power,but after my CDB blew it's gaskets & spewed all it's antifreeze down my NS wing after 2500 miles on a fully forged no expense spared build
I'd build the engine to the highest possible spec using the best parts. Believe me you will feel physically I'll when it goes **** up in a couple of thousand miles.

dean_1991

iTrader: (1)

thanks again... im doing the build my self.. ive got engine out and stripped.. were can i buy a twin scroll crank is there another name for it, i cant find one ?? this is a project no rush
also what is 5 speed PPG ?

TonyBurns

iTrader: (3)

Well the parts will still set you back between 1500-2k depending on what you get, the crank should be known as a cross drilled/nitrided crank, its the twin scroll crank, no other subaru has this.

Tony

Terminator X

iTrader: (7)

http://lateralperformance.co.uk/prod...kit__gears_1_4

Whines a bit on the move, liked the sound in my old classic. Strong gearbox albeit many also go for the 6 speed from a newage.

TX.

mickywrx

iTrader: (29)

Do your research Tony.

https://www.scoobynet.com/subaru-par...-and-more.html

TonyBurns

iTrader: (3)

Read what he wants

Tony

TonyBurns

iTrader: (3)

I think scoobyclinics is a similar price but stronger than the PPG gearset, a better option really, you need to add a good 1000 quid to that price to have the box built.

Tony

dean_1991

iTrader: (1)

thanks again... ill think ill go for the 6 speed dccd than the ppg but it can wait till next year.. i want to get all my engine done first.. i was looking at cdb couse i been told the open decks blocks fail from bottom end failer but i seen a few cdb for sale with the same issue ?

stevebt

iTrader: (8)

It can but for how long? for 400bhp you need to get rid of every mod you have or upgrade every mod you have Once you have done that you can probably run close to 400 bhp.

Mods in an early car cost a fortune due to needing everything

dean_1991

iTrader: (1)

not cheap i know but im keeping my classic, atm its an on going project sat on the drive with no wheels lol.

so if i go with what tony said 650cc injectgors what turbo should i buy ? to run around 400bph cheers

bigfarlz

iTrader: (9)

Be a lot cheaper to just buy a newage and mod it!

need4speeduk

iTrader: (26)

As per PM.

Build a 2.1 in a CDB. If you're considering spending that sort of money on the car then a ODB or SCDB shouldn't even be an option tbh. If you're going to do it, do it once and do it right.

And apply for a few more credit cards cos it wont be cheap.

dean_1991

iTrader: (1)

my question is before buyin a cdb. i know odb are common for bottom end failer but i have seen cdb with bottom end failer ?

need4speeduk

iTrader: (26)

Just read the whole thread.

If all you want is 400hp then tbh its not worth the money it'll cost you to get there. You'd be better off buying a classic thats already sorted to those levels or a newage. Be a lot cheaper.

kirstybumx3

iTrader: (22)

spend the extra and dont cut corners

do it right, do it once!

need4speeduk

iTrader: (26)

You put enough power through a block for long enough and most will fail eventually. Fact. All you can do to give yourself the best chance of having a strong engine is use a good base. i.e a CDB.

I honestly think you need to do A LOT more research before you go spending any money. Not being disrespectful, just offering advice and trying to save you a lot of headaches and cash.

dean_1991

iTrader: (1)

i do like the the newage, but ill prefere to have a classic. ok cheers for all comments my plan is now to sell this running odb with the spec above and buy a cdb for big build cheers mate