scoobydoo4u

ive been scanning throught the forum and there are sum conflicting opinionsbu i want peoples advice on wether ill need 550s to achieve 320bhp give or take with ..............

TDO5FE turbo upgrade from the tdo4
straight through stainless scoobysport (including downpipe)
green panel
apexi AVCR
apexi FR (mapped)
255 walbro fuel pump

my car is uk98
any advice would be apreciated
iain

RLE

iTrader: (2)

Hi Iain

I had this same problem when modding my UK97.
Had pretty much the same mods as you and I retained the TMIC and the standard 380 injectors and achieved 330bhp.
I did need a FPR fitting though.

scoobydoo4u

thanks for swift reply mate . forgive ignoranve but FPR?

myblackwrx

iTrader: (1)

With 550s the injectors can be pushed a lot harder but will require a tweak of your map.
I think - Flat4online.co.uk Subaru Impreza Mitsubishi Evolution EVO Walbro Fuel Pumps Injectors Intercoolers do them new for £300.
What is the car running at the moment?

FPR=fuel pressure regulator

scoobydoo4u

car has not been mapped yet im ordering the apexi fr from andyf this week and hopefully mapped by simon next month , with just AVCR and scoobysport system, walbro and panel its 239bhp/233lb

scoobydoo4u

the regulators are £225, so surely worth spending the extra dollar and get the 550s then? are they easy to DIY fit?

scoobydoo4u

and thats on the TDO4 the 5 isnt getting to me unitl next week

RLE

iTrader: (2)

550's might be a good idea if you plan to mod further but the standard injectors will be ok for your planned 320bhp.
I actually bought a set and was due to get them fitted prior to a remap with Andy Forrest but he suggested sticking with the standard injectors and adding the FPR.

Might be an idea to contact the mapper you intend to use and get his view.

RLE

iTrader: (2)

You will certainly be impressed with the difference mate. Your mods less an induction kit that I had fitted are practically the same as what I had.

The Apexi ecu was without doubt the best mod I added and the midrange punch was simply stunning. Have you asked Simon about your injectors?

myblackwrx

iTrader: (1)

Fitting the injectors i would say no unless you a competent mechanic (I've never tried to be honest)
Since you will be getting it mapped by Jollygreen its worth speaking to him directly when you've got everything ready to be mapped.
If you can afford the regulator you may as well go the whole hog and get it.

scoobydoo4u

thanks guys i wont be pushing for more than 320 in the near future , the other half will go nuts if the credit card gets bashed anymore this year !! think ill stick to the 380s and look into the regulator

Jolly Green Monster

iTrader: (4)

fuel pressure reg is a good move.. 225 is a bit expensive.. Pm for a better price

Simon

harvey

iTrader: (48)

On standard fuel pressure 380cc injectors are generally able to flow fuel for around 285 bhp. 440cc around 325 bhp and 550cc around 400 bhp. However, once modifications begin, very few people run standard fuel pressure (around 2.6 bar) Most people run over 3 bar and this extends the injector range, typically, 300 bhp 340 bhp and 420 bhp.
Just a very rough rule of thumb to help you, reliant on the pressure you use.