kylejennings05

hi all, iv got a 98 uk turbo which im planning to mod to 350hp...ish.... the mods will include;
fmic
vf30 turbo
stainless wraped headers
3" stainless exhaust
550cc injectors
apexi induction
apexi pfc
walbro fuel pump

could anyone tell me if this is possible with these mods? any help would be great thanks

Ian

iTrader: (10)

fuel pressure reg mayb

subaruturbo_18

don't forget the go faster stripes.

stevebt

iTrader: (8)

personally I would add an apexi AVCR

kylejennings05

is that a boost controller?

stevebt

iTrader: (8)

yes , it will help you maintain better boost and give better midgear accel

kylejennings05

ok thanks mate il have to add that and the fpr to the list then..

p1dazza

550cc can do 380bhp at standard fuel pressure so an fpr is something you do not hae to have.

p1dazza

Dont know about a VF30 Iwould go for VF34 or 35

p1dazza

if you have to go to the expense of an Apexi PFC and AVC R you might as well get Simtek ECU which is far more capable.

p1dazza

I think you will find ported headers far better suited to your power level and they will spool far earlier than tubular and produce more torque right across the rev range. The area under the graph on ported headers will be greater than with tubular and that is what makes the car quick across country.
Harvey on here did a special deal for me as I bought ported headers and got a tube and fin Hybrid intercooler from him which is far better than the bar and plate. It arrived the day after I sent the Paypal and he keeps these in stock.

stevebt

iTrader: (8)

but aftermarket headers are even better as they give more boost say at leats 0.2bar with say a maximum of 400rpm added lag as compared to ported headers

GraemeR

TBH standard headers would do the job, I made 374 bhp and 375 ft/lbs on standard headers

scoobyDAZZA

agree and on the choice of turbo , i made just short of 350bhp with similar mods to yours but with a vf34
and only tek3 , but you obviously need an aftermarket so why not go straight for a simtec . 1045 + vat fitted and mapped with anti-lag and launch control , or £150 cheaper if you don't want ALS or LC

p1dazza

Ported headers will increase the boost by 2-3 psi anyway but that is not the important thing. It is the area under the graph that counts. Just ask anybody else with ported headers.
Kylejennings05: I also suggest you think about PFR7B plugs.

kylejennings05

i dont no what these are mate ported headers and the pfr7b plugs if you could help me please that would be great

GraemeR

Ported headers are the standard headers opened up at the inlets to improve the gas flow, Harvey does a service exchange deal with these usually

PFR7B are spark plugs m8

kylejennings05

thanks lol

kylejennings05

does harvy who ports the headers havve a website

dazdavies

iTrader: (22)

Having been where you are now a couple of years ago i would advise the following.
Tubular Headers, VF34, fuel pressure Reg, simtek ecu.

My reasoning is simple. The VF34 is an excellent turbo and with supporting mods and correctly mapped will achieve 350bhp.

I would say a fuel reg is essential as my standard reg failed with a walbro.
It allowed too much fuel back to the tank and resulted in a cylinder running lean and wrecking the engine.

As mentioned if you are going to the Expense of a Power FC and an AVCR then you'd be better off getting the simtek.

I currently have the PFC/AVCR combo and I want to be swapping to Simtek too purely because I want rid of the maf sensor and I want the ALS, Launch Control and switcheable MAF options.

Daz

kylejennings05

what can a vf30 reach then? because id be well happy with 320/330hp if it is possible? thanks kyle

stevebt

iTrader: (8)

if you only want 320bhp just map what you have and be happy and save lots of cash

Molds

I also have a 1998 UK Turbo.

This is what I did to mine.

The evolution of a UK Impreza: 208bhp to …bhp [Archive] -

p1dazza

Daz; Having had tubular headers and swapped them for ported with matched uppipe the difference was unbelievable. 1 bar in 4th @3150 instead of 3600. hat was the only change.
Spark plugs NGK PFR7B Better than standard.
This is all I can find. www.gecities.com/harveysmith3000

stevebt

iTrader: (8)

I don't think headers were your problem ??? I have a GT30R and I see 1 bar of boost before that !! ported headers will always limit your cars power

dazdavies

iTrader: (22)

Have to agree with steve on this.

I too have a rotated GT30R now and I'm seeing 1 bar at around 3000rpm.
The VF34 I had was on UK heads too. It was a great turbo and the headers improved things no end without any noticeble loss of spool.

I think turbo lag is a myth in some cases. My GT30 feels no lagier than when I had the VF34 on the 2.0L with standard UK heads.

I've no doubt that the ported standard manifol is very capable but I honestly think the GTspec tubular manifold is in a different league.

p1dazza

Steve; Where your gt30r r makes1 bar is totally irrelevant. I dont run the same turbo.
All I changed was the tubular gt spec headers for ported o/e with matched uppipe so you are not making sense saying

"I dont think the headers were your problem"

Lots of people have found that good ported headers outperform tubular well over 400bhp on a 2 litre.

Is your car 2 litre and what bhp.

"Ported headers will always limit your cars power"
Bollocks. Not up to 400 odd bhp on a 2litreas lots ofpeeps on here already know.

p1dazza

Daz; From what you say I guessyou have 2.5 certainly something bigger than 2 litres. With 25% more capacity obviously lag is almost eliminated and spool is that much lower.

stevebt

iTrader: (8)

it was on a 2 litre and was 486bhp, I have now put a bigger cc engine in

Jolly Green Monster

iTrader: (4)

yes.. 320~330bhp no problem.