e110at

Looking to upgrade from standard injectors on my 95 wrx but I'm not sure what would be best?

End result for just now 300bhp, will I need to upgrade fuel pump?

Will standard turbo produce this without stress? If not what would be the best turbo to go for?

Thanks

leecalcars

iTrader: (37)

Details of your car mate mods turbo etc

leecalcars

iTrader: (37)

is it a tdo5 ?

marcevs72

iTrader: (5)

Need 440's as standard ones good for 280 ish.just about to get mine changed and simtek fitted with enginetuner as soon as get chance

e110at

The mods I have got so far,

Straight through exhaust, s/s headers, doluck panel filter, I have bought a fmic but the more I read I feel a good tmic may be better? Not sure what turbo thinks it's standard? I was going to upgrade injectors and fuel pump is this necessary for 300ish. Car is running standard boost.

Can the standard ecu be mapped?

Thanks

marcevs72

iTrader: (5)

Mines a 93 etc and getting simtek as better value than getting ecu chipped etc...

musso2010

You will need either a new ecu, like simtek or apexi. Or an ESL daughterboard.

Your car should have a TD05 fitted and is good for the power you require.

Fuel pump has nothing to do with increasing performance but its a good thing to change the old pump for a new uprated one.

musso2010

You'll make 300bhp on 380's but they'll be maxed out and not something i would be to happy doing.

harvey

iTrader: (48)

95 WRX with 380cc grey injectors, fuel pump and no aftermarket FPR will max out around 280 bhp. Marginally more if you are lucky. 440cc injectors are well within your power target (330-350 bhp typically). Your TD05 16G is capable of 330-350 bhp but only with full supporting mods.

e110at

For piece of mind what are the supporting mods??

harvey

iTrader: (48)

1) Everything in good order and good working condition (with new Subaru or K+N pannel filter. This may not apply to you as you have an FMIC.)
2) NGK PFR7B plugs gapped at .65mm
3) Walbro fuel pump (£75 delivered)
4) 3" open neck down pipe and good performance exhaust hopefully 3". Note. Not all exhaust systems perform as well as others and some of the noisey ones seem to perform particularly badly. While I say 3" and that is preferable as it future proofs your car. I think a 2.5" will do the job adequately to around 400 bhp.
5) Professionally ported headers and matched uppipe (£369 fitted for fixed price £75)
6) 440cc injectors 320 plus bhp on standard regulator or 550cc injectors will support close to 400 bhp O/E FPR.
7) On a 93-96 car you can improve the inlet tract and make it straight from the air box to turbo dispensing with the resonator box between turbo and air box. Do NOT remove the inner wing snorkle as you WILL reduce power. (Not applicable to you IF you fit the FMIC.) This is probably the least benefit so do not make it high priority.
8) If you already have an FMIC you may as well use it IF it is efficient. If it is junk then it can reduce power or add very little and certainly not worth the effort or cost of fitting. If complete, we fit FMICs for a fixed £185 and we have most spares to adapt most kits.
An efficient intercooler will have a tube and fin core, low pressure drop across the core and the pipework will have smooth radius bends. If it is bar and plate, regardless of manufacture, it is not your best option and any bar and plate FMIC with 1,000 cfm flow and .5" psi pressure drop across the core is a total load of bollocks and the vendor's claims should be taken with a pinch of salt.
9. You are now at the point of needing a map but your ECU is not mappable so you need to look out for an Apexi, Simtek or ESL or similar.
10. Your choice of mapper is critical.

I hope this helps you and some of the wider audience new to Subaru. Generally the modds should be carried out in the above order as detailed.

Done properly and with an FMIC providing your turbo is in good order and everything is working well you now have 330 plus bhp

e110at

That's great thanks for the help, I'll just work of the list