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Old 15 January 2015, 11:26 AM
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darrenmma
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Default Advice on what power i can achieve??? WRX

Please can anyone tell me what BHP i can achieve without the expensive mods .....which i mean as forging parts of the engine internals.....i dont want to do that........

WRX 05 reg 47,000 MILES.

new gearbox and exceedy race clutch.
new cambelt fitted and all other serviceable parts.
sti manifold
sti up pipe
3" straight through exhaust and decat.
sti pink injectors
front intercooler ( normal rad not ally )
apexi boost gauge
hks dump valve
IHI V34 Turbo
TGV deletes
spark plugs 7R
255 Walbro
Aliminium Feeds - K&N (think its k&n) have to double check.
( Unsure if fuel rail lines are standard etc )
open mapped to 322BHP / 290LB torque. ( area 52 notts ).

I am guessing 3 POINT SOLENOID ( which ones best??) and TWEAKING MAP ??? What Power??? (What mapper will push it to its limit but safely) Anything else...........

Last edited by darrenmma; 15 January 2015 at 11:29 AM.
Old 15 January 2015, 11:32 AM
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Tidgy
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320 is a bit low for a vf34, but not much more before things start to get mega expensive, engine forging time then.
Old 15 January 2015, 11:37 AM
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darrenmma
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well im assuming the 3 point solenoid is needed and map tweaked .....but as stated what am i looking to get out of that setup anyone thanks
Old 15 January 2015, 11:39 AM
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Tidgy
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VF34 will hit 340-360 with right supporting mods, so around that.

You can't say figure X, it varies from car to car. Some make higher than others.
Old 15 January 2015, 12:01 PM
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RS_Matt
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Originally Posted by Tidgy
320 is a bit low for a vf34, but not much more before things start to get mega expensive, engine forging time then.
Agreed, make sure you have a restrictor pill or the right one.
Old 15 January 2015, 05:50 PM
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bludgod
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your turbo should have potential for more, but I have a few questions:
do you have a dyno sheet for this figure?
do you have a copy of your rom with a recent log file to share?
do you run the car on decent super unleaded or regular?

If you look at the boost plot you'll know if you need the 3port boost solenoid or not as it will help you spool a little quicker and hold boost a little longer. If your already meeting your target boost quickly and holding it as long as you need to then you may not see the big improvement you were hoping for. Maybe the money would be better spent on an adjustable FPR to help you get a little more torque?
Old 16 January 2015, 08:33 PM
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darrenmma
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i bought the car of someone yes i have dyno sheet with figure....no copy of rom or a log file....i run the car on V power 114p a litre. first petrol turbo and performance car mate....so im not sure i will upload a picture of the dyno sheet.....couldn't tell you about the boosting im not experienced and dont want to give full information.....
Old 16 January 2015, 09:05 PM
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BBB3
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Engine 2.5?
Old 16 January 2015, 09:12 PM
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darrenmma
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2 litre engine wrx
Old 16 January 2015, 09:21 PM
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BBB3
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I think it's bout right 325 bhp, mac 3 port is what I'm using on my spec c,
I wouldn't go chasing numbers but how it drives and performs and to make sure it's safe.
Old 16 January 2015, 09:38 PM
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bludgod
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no problems - they are fairly standard questions to help understand how your current map is setup mr but if you don't want to sure that's no hassles.

I run around 22psi midrange (3500rpm or so) tapering down as it approaches 7000rpm - your dyno should give you a nice flat torque curve from 3500/4000rpm or so up to 6000/7000rpm depending on the map setup, your boost should be fairly consistent in it's delivery (no sharp drops in PSI/bar) until you approach the end of the pull then things will start to slack off.

If your dyno sheet shows injector duty or A/F ratio then you can gauge if there is scope for any more boost without having to spend some money on it. If the injectors are under 90% throughout the pull then you have scope for a little more boost. Now that being said more boost may not mean more power so you'll have to trust the experience of your mapper on that one.
Old 17 January 2015, 01:21 AM
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BP 1012.5 / RH 59 , AT 16 , IT 37 , RR 100 , TN 3.243 , 20141120 172173 , CK 309 , CF SHOOT_44 .

Sorry guys i am new too this so i have listed spec of subaru best i can and asked about the 3 port solenoid and a remap as to what i might achieve....... below is the dyno , someone will make more sense of it all than me as im still learning.

Last edited by darrenmma; 17 January 2015 at 01:29 AM.
Old 17 January 2015, 01:28 AM
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Old 17 January 2015, 10:13 PM
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Oh also has toyosport front inter cooler.
Old 17 January 2015, 11:51 PM
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Dunno how Toyosport compare to Japspeed FMIC's but their products aren't really great quality if the up pipes I've seen are anything to go by.
On a decent FMIC a good Vf34 should be pushing 350+ with a good map I'd have said.
Whilst the advice not to chase figures is sensible I would still say that figure is too low of you're certain the components are in good order. VF35's on TMIC's make those figures all day long; a FMIC should see more power.
Have you got a decent turbo inlet hose fitted? You might have a leak if not as the plastic ones are notorious for tearing.
Btw you don't need a 3 port to make that power it will help fine tune control of boost but shouldn't inhibit the car from making good power.

Last edited by MrNoisy; 17 January 2015 at 11:53 PM.
Old 18 January 2015, 08:01 PM
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Doesn't say what boost you're running unless I've missed it?
Old 18 January 2015, 08:04 PM
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i dont know how to find that out Iain ??? It has a boost gauge that of course just starts at 0 and goes up when you boost.....i dont have any other gauges on pillar etc
Old 18 January 2015, 08:11 PM
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This is my car .

https://www.facebook.com/media/set/?...1&l=6ffe9e3e4c
Old 19 January 2015, 09:21 AM
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A vf34/35 will make around 340bhp when running 1.5bar of boost, it is possible that you are mapped to a bit less ....
Old 19 January 2015, 10:10 AM
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JGlanzaV
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Originally Posted by darrenmma
first petrol turbo and performance car mate....
Not wanting to sound harsh here, disregard all the advice anyone else has given you.

And take this bit of advice -

Get the car in for a health check, oil change etc, get someone to run it on the dyno and check the map etc.

Once all is good. Go out and learn to drive the car properly before you start trying to get more power out of it if it is your first car like this. It is faster than you realise....
Old 19 January 2015, 11:10 AM
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bludgod
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Originally Posted by JGlanzaV
Get the car in for a health check, oil change etc, get someone to run it on the dyno and check the map etc.

Once all is good. Go out and learn to drive the car properly before you start trying to get more power out of it if it is your first car like this. It is faster than you realise....
I would agree with this - if the map is healthy then a full service to get everything in tip top condition is step 1. Learning how to drive the car is something you'll have to build up over time - if the car pulls well (which looking at the dyno it should) then drive on and enjoy it. It doesn't matter what you do to it there will always be scope for a little more next thing you know its at 350hp and your snapping gearboxes left right and centre.

The front mount alone isn't going to be adding any power for you, but the 3port and a remap should help bring the boost in a little bit sooner. Though you will be better off finding a mapper and talking to them about your setup and what can be achieved. If they are worth the price they are charging then there should be no hassles in answering any number of questions you might have beforehand.
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