VF35 Maximum boost?
15 June 2009, 11:49 AM
#1
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VF35 Maximum boost?
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
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
Last edited by Stealth; 15 June 2009 at 11:58 AM.
15 June 2009, 12:14 PM
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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
Have a word with someone like David at APi, but get ready to open your wallet!
Ns04
15 June 2009, 02:20 PM
#4
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.
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.
Last edited by TingTongPJ; 15 June 2009 at 02:23 PM.
15 June 2009, 06:30 PM
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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
Helps pay for the bigger one you'll need !
dunx
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15 June 2009, 07:22 PM
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Ns04
15 June 2009, 08:18 PM
#9
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?
15 June 2009, 08:29 PM
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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
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
15 June 2009, 08:33 PM
#11
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
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
15 June 2009, 08:34 PM
#12
15 June 2009, 08:36 PM
#13
15 June 2009, 08:40 PM
#14
It's not the size of the injectors it's the quality of the mapping.
15 June 2009, 08:45 PM
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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
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
15 June 2009, 08:46 PM
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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.
It's not the size of the injectors it's the quality of the mapping.
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!
Last edited by New_scooby_04; 15 June 2009 at 08:47 PM.
15 June 2009, 08:52 PM
#17
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
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
15 June 2009, 09:02 PM
#19
, stay as i am for a while till the novelty wears off lol,sorry for the slight thred hijack!
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