Hi All,

I have an STI7 and to be fair I'm getting a little bored of the power, she currently has the TSL 333 upgrade on her (so exhaust, panel and ECUTek remap) but it's now not enough.

Is it feasable to get the car remapped again using the exsisting kit or should I change my Turbo and injectors and then remap?

The remap runs the car at 1.3bar, the injectors are at 75% on full chat and the advance multiplier is as good as it gets.

Is there room for improvement using what I have and just have a remap? I just don't want to run big boost through the VF35 if it is going to blow it to pieces

thanks

Tony

 

You'll be approaching a level where the VF35 doesn't have much more to give I'd imagine. For the best gains. You'd be looking at a bigger turbo. 18G would be nice on an STi

Have a word with someone like David at APi, but get ready to open your wallet!

Ns04

 

yeah i think ns is right, turbos prob about giving its bollox. new turbo will be needed to get yu higher

 

my friend has a sti8 running a vf35 turbo, he has full decat, headers and a performance air filter. with his remap he is running 1.4 bar of boost and is pretty much maxed out.
hope it helps.

as above if you want more get your wallet out, it's all about limits of each component, ie turbo, injectors, intercooler, clutch.

you still have a quick car remember your spool up is fantastic.

 

Dag nam it, right then VF35 going up for sale soon with some 550 injectors LOL

cheers for the replies

 

Very popular up-grade for the WRX crowd, price high as there are few about atm.

Helps pay for the bigger one you'll need !

dunx

 

squeezing 1.55 bar out of my vf35 running 342/328 but they dont last that long working this hard remember td turbo's are stronger!!

 

I'd keep the 550s mate; they should be man enough for an 18G. You don't want injectors too large for your power aspirations as they can cause issues when it comes to mapping.

Ns04

 

my vf35 was mapped with with 1.36 bar using 440 injectors,is that about right or has the mapping been done too far in the safety margin? could i not have had it mapped with 1.4 bar? it made 298bhp and 303lb ft,so was i losing a bit of power cause mapper didnt run enough boost?

 

depends a lot on the individual car.. the Sti newage tends to come alive at a certain boost level whcih varies between 1.4 and 1.5bar deopending on the car.
If you went to tubular headers and had a remap you should see a little more power and torque.

99greenwagon,

the 440cc injectors would mostlikely be the reason it was stopped at 1.36bar as they are probablly pretty maxxed at that. Also the newage sti heads have vvt which works very well and will allow more power on the same turbo as the 99 etc

Simon

 

so would i benefit from 550s and a tweek?

 

small amount yes.. would be worth adding headers or other stuff to make the most of the tweak though, are you still on tmic or fmic?

Simon

 

sti 5 top mount

 

I have to completely disagree with that statement. I had 740cc injectors on a forged 2.0L with a VF28 (intention was to eventually get a bigger turbo). It was mapped my Andrew Carr on a Power FC. It did almost 30K miles like this and economy was better than it was with the 440's it idled incredibly well and was very very driveable. Infact they were better all round than the 440's

It's not the size of the injectors it's the quality of the mapping.

 

so 1.36bar, sti tmic and 440cc injectors sounds perfect.
Some tend to peak and tail off and so you can run more at that peak because the heat higher up the rpm range will be less due to the boost tailing off.. some hold the boost well and it can get a bit hot with tmic and it is wise to keep fuelling slightly richer on tmic hence the reason whom ever mapped it probably stopped at 1.36bar, also depends on how much ignition advance the engine takes during mapping you can judge how well the setup is coping with heat from turbo charger and amount of boost etc etc..
It is easy to get caught up in peak power and peak boost figures when the whole thing should have been assessed for you individual set up when mapped etc

Simon

 

That'll probably be the ECU then Daz, Power FC probably lets the mapper do more with the fueling (greater resolution?) than Ecutek with JECS

VF35 running 330bhp on 550s. mapped with Ecutek slight lumpiness on low throttle as the turbo wound up.

Mapped by the Guru, so no issue with mapping.

Both Bob and David at APi said there is only so much you can do with larger injectors than necessary for power level on the JECs ECU.

Simtek installed: problem sorted!

 

thing is,would the cost with headers 550s etc and map tweek justify the extra power/torque? if its only another 10bhp etc i dont think it does justify?

 

possibly not no.. if you added a fmic too you would see more but again more expence v power etc..

 

thankyou for the info, stay as i am for a while till the novelty wears off lol,sorry for the slight thred hijack!