How much more power can I squeeze out of my VF35
04 March 2007, 11:52 PM
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How much more power can I squeeze out of my VF35
Hello peeps
I was wondering what the MAX figure you can squeeze out the VF35.
At the moment I have 370.6 with mine and am not wanting to loose my fast spool up.
I would love to get as close to 400 as possible as a mate of mine said if I got 400 he would eat his own liver!!!
, so where can I squeeze a few more ponies and torquey things from?
Ive already got fitted
3" turbo back decat system
GT spec 2 headers and up pipe
APS inner wing induction kit with the Perrin intake silicone hoses to the turbo and a couple of other Samco bits and bobs
Ported wastegate to try stop the boost creep these turbos are famous for
"booster" in the fuel
Andy.F map
when I had it last mapped my injector duty cycle was at 95% so im thinking about a fuel pressure regulator and an AVCR
Anyone have any other suggestions???
Graeme
I was wondering what the MAX figure you can squeeze out the VF35.
At the moment I have 370.6 with mine and am not wanting to loose my fast spool up.
I would love to get as close to 400 as possible as a mate of mine said if I got 400 he would eat his own liver!!!
, so where can I squeeze a few more ponies and torquey things from?Ive already got fitted
3" turbo back decat system
GT spec 2 headers and up pipe
APS inner wing induction kit with the Perrin intake silicone hoses to the turbo and a couple of other Samco bits and bobs
Ported wastegate to try stop the boost creep these turbos are famous for
"booster" in the fuel
Andy.F map
when I had it last mapped my injector duty cycle was at 95% so im thinking about a fuel pressure regulator and an AVCR
Anyone have any other suggestions???
Graeme
04 March 2007, 11:57 PM
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you`ve got 370bhp out of it? From what I have heard they`ll go to about 350ish normally dependant on supporting mods so I wouldn`t have thought you can get much further than you have it now
05 March 2007, 12:25 PM
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Im still running the standard STi9 top mount just now.
im toying with getting a FMIC made up and revercing my manifold to reduce the length of the pipework and help reduce lag
Im totaly lost with all the different types of turbo, but all I know is that im wanting a fast and hard spool up. Just now in 5th and 6th gears im hitting my full 1.55 bar of boost at 2700 rpm, with max boost in 4th coming in at about 3100ish. When Andy Forrest overlayed my boost profile over the top of an STI8 JDM car with the twin scroll turbo he had mapped the 2 profiles from 3000 rpm onwards were more or less identical
Graeme
05 March 2007, 01:23 PM
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Graeme, Have you thought about maybe getting the Tumbler Generator Valve Deletes thingys??
maybe one of thesesseses
JDM Spec-C Intake Manifold
Bandit
maybe one of thesesseses
JDM Spec-C Intake Manifold
Bandit
Last edited by STi_Bandit; 05 March 2007 at 01:28 PM.
05 March 2007, 03:50 PM
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I didnt realise that was possible 
06 March 2007, 01:59 PM
#15
I'm gobsmacked - "my full 1.55 bar of boost at 2700 rpm, with max boost in 4th coming in at about 3100ish.". I also find it incredible that you can get 390 from a 35 @1.45 or is this a joke?
I think you're lucky that the TMIC is still holding together as others have failed with less but that could be down to different dump valves. Where is this RR as it would be interesting to see how mine compares there?
F
I think you're lucky that the TMIC is still holding together as others have failed with less but that could be down to different dump valves. Where is this RR as it would be interesting to see how mine compares there?
F
06 March 2007, 06:51 PM
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07 March 2007, 12:19 PM
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07 March 2007, 12:20 PM
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07 March 2007, 04:10 PM
#20
A typical figure for a VF35 on Dyno Dynamics rollers, V Power and NF with all supporting mods is around 350 bhp so 370 bhp is a credit to you.
On a like for like basis a TD05-18G will do 360 bhp and it will be VERY rare for any 05 18 G to exceed 400 bhp on road fuel and NF. I know of a couple. So a move to an 18G would not necessarily be an advancement.
In similar circumstances, a TD05-06 20G will do around 385 bhp, and some do more than 400 on V-power plus N.F.
Hope this helps.
On a like for like basis a TD05-18G will do 360 bhp and it will be VERY rare for any 05 18 G to exceed 400 bhp on road fuel and NF. I know of a couple. So a move to an 18G would not necessarily be an advancement.
In similar circumstances, a TD05-06 20G will do around 385 bhp, and some do more than 400 on V-power plus N.F.
Hope this helps.
07 March 2007, 09:09 PM
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You could always run it on race fuel Graeme, I'm sure I could squeeze another 30bhp out of it if you used some of the expensive stuff that some use to impress at rolling road days 
Andy
Andy
07 March 2007, 09:27 PM
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I'm running 320bhp out of my 35 at 1.25 bar in 2005 wrx lots of mods full decat,equal length, sti pinks ,walbro and remap. I was under the assumption that these turbo's were blowing their twa* off at 350bhp so this thread makes intresting reading.
Sorry to hijack the thread a little but my headers are being ceramic coated at the moment and my APS front mount and wing mounted induction arrive end of the month from Oz. What do you think i could up the boost to on my wrx safely with these mods 1.3 bar ?
Sorry to hijack the thread a little but my headers are being ceramic coated at the moment and my APS front mount and wing mounted induction arrive end of the month from Oz. What do you think i could up the boost to on my wrx safely with these mods 1.3 bar ?
07 March 2007, 10:18 PM
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Most of the mods (850 injectors, flowed heads etc.) are for running a much larger turbo but as I couldn’t get it to fit at the time I put a vf35 on as a stop gap. That ‘stop gap’ has been on 12 months now and I must say I’m really enjoying driving it and tweaking it. FWIW In my case upping boost by 0.05bar @ peak power lost around 5-6 hp. I run 1.7bar midrange.
Andy
If I manage to get 400 then I think I will try some race fuel for a chuckle
It’s alot of money to spend just to get 3 numbers though (however impressive and/or irrelevant they may be!)
Andy
If I manage to get 400 then I think I will try some race fuel for a chuckle
It’s alot of money to spend just to get 3 numbers though (however impressive and/or irrelevant they may be!)
07 March 2007, 10:36 PM
#24
That's more like it - 390 @ 1.45 bar had me a little sceptical
Quote:
Originally Posted by Butty
I'm starting to feel a little inadequate with only 340 hp @ 1.4 bar.
Where did I go wrong?
Nick
"additives" (and probably headers?!)
Unfortunately its my co. car and I have to do 25k miles a year in it - V power is pricey enough without buying NF or other jungle juice on top.
Nick
Quote:
Originally Posted by Butty
I'm starting to feel a little inadequate with only 340 hp @ 1.4 bar.
Where did I go wrong?
Nick
"additives"
(and probably headers?!)Unfortunately its my co. car and I have to do 25k miles a year in it - V power is pricey enough without buying NF or other jungle juice on top.
Nick
07 March 2007, 11:57 PM
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I'm running 320bhp out of my 35 at 1.25 bar in 2005 wrx lots of mods full decat,equal length, sti pinks ,walbro and remap. I was under the assumption that these turbo's were blowing their twa* off at 350bhp so this thread makes intresting reading.
Sorry to hijack the thread a little but my headers are being ceramic coated at the moment and my APS front mount and wing mounted induction arrive end of the month from Oz. What do you think i could up the boost to on my wrx safely with these mods 1.3 bar ?
Sorry to hijack the thread a little but my headers are being ceramic coated at the moment and my APS front mount and wing mounted induction arrive end of the month from Oz. What do you think i could up the boost to on my wrx safely with these mods 1.3 bar ?
08 March 2007, 12:05 AM
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08 March 2007, 10:06 AM
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Hello Mark 
I run VPower with 3 ltrs of methanol. I don't have the graph to hand at the mo, but AT was 11 degrees, IT was 12 degrees (no jiggery pokery there then!). FWIW with a slightly different spec it made 356hp @1.35bar on plain Super UL previously.
Surge is a bit of a pig below 3.5k, as can be expected, but then you can't have everything. Ho-hum
I run VPower with 3 ltrs of methanol. I don't have the graph to hand at the mo, but AT was 11 degrees, IT was 12 degrees (no jiggery pokery there then!). FWIW with a slightly different spec it made 356hp @1.35bar on plain Super UL previously.
Surge is a bit of a pig below 3.5k, as can be expected, but then you can't have everything. Ho-hum
08 March 2007, 12:47 PM
#29
356@1.35 is better than I'd expect on pump fuel but probably accounts for your head work and other supporting mods.
I have read this thread carefully and your statements were true AFAICT but mislead some due to the detail you omitted.
Perhaps the thread title should be "how much power from a VF35 on pump fuel with no additives and usual mapping"? But then again the G.Mac may just want dyno queen figures?
Do you drive your car with methanol and at that boost all the time?
F
I have read this thread carefully and your statements were true AFAICT but mislead some due to the detail you omitted.
Perhaps the thread title should be "how much power from a VF35 on pump fuel with no additives and usual mapping"? But then again the G.Mac may just want dyno queen figures?
Do you drive your car with methanol and at that boost all the time?
F
Last edited by Floyd; 08 March 2007 at 12:49 PM.
08 March 2007, 01:28 PM
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G.Mac does, so do I, come to think of it, so do 1/2 of Scotlands Imprezas Methanol is so cheap that it actually costs less to run a car on a 10%mix than it would to run V-power alone.
FWIW, the 05 spec Sti makes far better use of the VF35 than the earlier models. I'm not sure exactly what the difference is but its good for circa 15bhp more than the earlier models in my experience.
Andy
Methanol is so cheap that it actually costs less to run a car on a 10%mix than it would to run V-power alone.FWIW, the 05 spec Sti makes far better use of the VF35 than the earlier models. I'm not sure exactly what the difference is but its good for circa 15bhp more than the earlier models in my experience.
Andy