PrimeKos

iTrader: (1)

Hi All,

Recently had my GB270 wagon in for a Ecutek remap and have to say was slightly dissapointed with the end results. Prior to the remap I got Subaru4u to install a VF35 and a cosworth panel filter. No other upgrades where made to the stock fuel pump and solenoid. Essentially the end result was 289.4HP and 334 fftlb.

I must admit I was expecting the car to easily hit the 320BHP mark but was told that due to the fact I put supermarket Ron97 in the tank, it showed a lower result. I have since been using Vpower but the car is due to go back for a remap next month and I cant help but think surely the lower results cannot just be because of the fuel that was used.

Any thoughts guys?

BR

scoobymikepic

iTrader: (3)

i would change fuel pump, just for piece of mind,
ave they fitted 3 port boost sol, and put tidy petrol in next time. eg v power
scoobymike

Darrell@Scoobyworx

iTrader: (5)

3 port boost solenoid and a 255lph fuel pump would be a good starting point

We can help with the fuel pump and we also have a second hand 3 port boost solenoid as well which you can have for £25

Pump link below

http://www.scoobyworx.com/fuel-systems-38-c.asp

PrimeKos

iTrader: (1)

Thanks guys,

It is actually rather frustrating as I did ask before the remap was done if the fuel pump and solenoid should be upgraded. Was told it wasnt really needed as the stock ones on the GB270 are good enough for 350bhp.

PhilWrx100

My 05 Wrx blob made 280bhp and 290 lb ft torque on a std td04. Mapped by Duncan/ racedynamix. But to get this result i did put on a sti uppipe, Prodrive sports cat, decat centre pipe, Prodrive rear box. Also did put in 225 fuel pump, 3 port sol valve and greens panel filter. This got the most out of the turbo and the injectors now running at 98% and boost at 1.3 bar. Fantastic car now.
Have you still got standard downpipe on and uppipe? If so change em to get the most out of that good turbo. Just think what Prodrive did on the wr1 or sti with ppp.

PrimeKos

iTrader: (1)

It has the original prodrive system that was installed from new. So believe this would be an upgrade compared to the stock WRX system.

trevsjwood

iTrader: (2)

thats good advice, no need to spend money unecessarily. The chaps at subaru4u know what they are talking about.
V-power will give you more bhp over 97ron, just get rid of the cat in the up-pipe if there is one.
Trev

tubbytommy

iTrader: (20)

289 for a vf35 is pretty poor!

PhilWrx100

Ok. Still think it could have a standard downpipe as ppp Wrx only kicks out 265bhp. And only change to the exhaust is the last cat to a straight through version. Ppp uk sti is the one you want to match. One cat only being Prodrive sports downpipe cat.

PrimeKos

iTrader: (1)

Thanks Trev, I have no reason to doubt them and they were very helpful. Not sure about the up-pipe as I don't know what the stock one is. I still think the fuel pump and solenoid is an essential upgrade as the stock one has done 54k already so could probably do with replacing.

PrimeKos

iTrader: (1)

Thanks, is there a quick reference quite that could confirm what the GB270 would have from stock. I really don't want the car being loud when driving though.

the shreksta

iTrader: (20)

stick a sti top mount on there and some sti injectors aswell

PrimeKos

iTrader: (1)

Been told the stock top mount is good for 350bhp and the injectors on the GB270 are 550's already so not sure these need replacing.

PhilWrx100

Mine's not fella as kept resinator pipe in place and got a Prodrive back box. I think most will agree it the best way to keep it quiet with no drone on motor way. Not difference to standard car which i had at the beginning of last week before bits went on and road
mapping.
regarding gb 270 one of the guys here will know. But think just ppp pack with intercooler pipe. Prodrive rear box, straight through delete cat, and ppp map.

PrimeKos

iTrader: (1)

I'm only looking to achieve around 320bhp which should be rather easy on a VF35.. Considering the advice provided above I think the following seems sensible to achieve this.

3 port boost solenoid
255 fuel pump upgrade
Uppipe replacement ( potentially)
Put V Power in this time.

Anything missed?

PrimeKos

iTrader: (1)

Ok mate, thanks. Will have a look into it. Any particular brand or place to source from you could recommend?

Tidgy

reducing the ron will pull power back alot, but would have thought it would still crack 300. my 2.5wrx didnt run out of fueling on the standard pump untill around 330bhp, although that was on a sc46 while being mapped. Also still on the standard boost solenoid and now running 404/421 fully mapped up

stevebt

iTrader: (8)

Were you happy with how the car performed before it went on the dyno? If you were whats the big deal as different dyno's give differing results.

Tidgy

speak to scoobyclinic about there scr exhaust, i wanted a quiet exhaust that would do the power and it did lol

AS Performance

iTrader: (4)

3port isn't stricly required at that level but i would sort fuel pump...........as you state the H/eye car has same spec injectors as the STi from the factory

as for exhaust, the 2.5's dont have the up-pipe pre-cat BUT you will have both cats after the turbo

PrimeKos

iTrader: (1)

I wonder if I should change the fuel pump and put vpower in and see what result I get first.

Tidgy

have you got print outs fo the dyno runs? bhp/ftlb and afr/boost are normal ones

PrimeKos

iTrader: (1)

Thanks so I think I will replace the fuel pump and maybe look at a straight centre pipe to eliminate one of the cats, add some V Power and see how she gets on.

PrimeKos

iTrader: (1)

Yes mate got some print outs, want me to upload them?

Tidgy

yeah put em on, might give a clue as to whast happeneing

PhilWrx100

Well Prodrive don't trade anymore but could try Scoobyworld they do em. Or ebay for sports cat and sti uppipe second hand but don't buy flexi uppipe.
But as the guys said pump, fuel 99, and 3port will help alot
Cheers

Scoobyworld

iTrader: (4)

If you're still running with factory cats in place that's almost certainly the reason for the poor result, combined with fuel pump and low RON fuel.

The standard boost solenoid should control the boost fine at that level, so I wouldn't suggest replacing this unless Subaru4U are having problems controlling the boost.

So, replace cats with decat/sports cat units, fuel pump, and Shell V Power and you'd see results around your expectations

Neil

PrimeKos

iTrader: (1)

On route

PrimeKos

iTrader: (1)

Neil thanks alot, thats very helpful. Can I contact you in the morning to get a quote?

trevsjwood

iTrader: (2)

Are you sure it was the pump? I'm absolutly certain my standard pump ran lean at 430hp, this on a forged 2.5 running a MD321H. This wasn't intentional of course as it should have been a walbro 255 in there but I was ripped off.
After fitting an RCM 350 my 650 injectors ran 442hp at 85% IDC.
Trev