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Those two paramaters are mutually exclusive as a general rule (unless you look at a twin scroll set up).

In general though, you're best to think more about how you plan to use the car...

If you want a quick street car with the same or better spool than stock I'd look at maybe the AVO 320 (peak 250whp) or a port and polished TD04 (peak 240whp). You can drive this thing around at 2500rpm and get a kick in the pants up to ~ 6000rpm

If you want something with a higher peak say for the track and plan to keep the car above about 4000rpm I'd look at a port and polished VF34 (peak 290whp) or the AVO400s (great turbo! 300+whp).

Then if you want a drag application and don't mind keeping the car over 4500rpm go a VF22 or AVO500 (or a green or whatever - sorry drag applications aren't my thing)

I have a standard VF34 on mine and am making 290whp with a hyperflow TMIC and 16psi of boost (and plenty of supporting mods).. This is on about 95 ron fuel.

The car drives very differently to my TD04 set up which was 230whp. My current set up is actually slower on the dyno at 3500rpm and then much quicker at 4500rpm and pulls like crazy to redline...
 

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clutchcargo - your making 290whp on the vf34? what other mods do u have? do you like your setup? is it pretty fast? that was probably a stupid question, but ive never rode in a fast car. fastest car ive been in is mine, which is a stock wrx with stage1 accessport. haha, pretty sad eh? o wait, ive rode in a stage2 AP wrx before. is it a huge difference? and with all your mods, do u still think your car is reliable? thats what im looking for.... a nice fast/quick setup that is still reliable.
 

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At 5800ft you're gonna be hard pressed to make 350whp on any turbo. Take a look around over in the mountain states forum... I don't think you're gonna see too many guys pushing that much power, especially not on pump. Also, in order to do that up there you're gonna need to run a turbo that can run a significant amount of boost. Any turbo that can move that much air probably doesn't spool quickly... so basically, your goal is unrealistic.

Clutchcargo made some good suggestions. Evaluate what you want your car to do and what is important in relation to your driving style... then pick a turbo from there....

I would suggest the avo400/xs450, but I'm kinda biased:D
 

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Discussion Starter #5
I know that I am going to have lag regardless, but for that price range which is the fastest spooling?
 

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Hi thegame,

As I mentioned the car drives a whole lot different to the way it did in the first round of mods.

Here's my website for the car: http://www.element.net.au/subi/

As you can see I have the full list of mods as well as 2 dyno plots showing the current Vs old tune (203awkw/167awkw). This is on Aussie fuel which is pretty good (98 Ron, but I think you guys average your Ron so it might be closer to 95).

The beauty is that this is only running 16psi, with a safe air/fuel mixture throughout (no pinging). This was tuned at AVO HQ over here (one of the benefits of living here) by Terry himself. I would say reliability is virtually unaffected (not including drivetrain.)

I have done just about everything to the car except for internals, so from start to finish:

AVO SMT6 ECU
AVO Pod
AVO Silicone Intake
VF34 Turbo
Apexi AVCR boost controller
Hyperflow TMIC w AVO BOV & Waterspray
STi 550cc injectors & Walbro pump
AVO uppipe
AVO Turbo back exhaust with stainless race cat
AVO steel backed heavy duty clutch

I would say the silicone intake and hiflow cat were responsible for extracting enough from the VF34 to get me over 200kwatw, and this is of course on 16psi, where I could probably run 18-19psi happily.

Put simply this car is simply a monster. :) 2nd gear runs on the stock suspension made it feel like a family car.. So I installed some H&R springs and I'll put in some swaybars.

I'd like to put it down the 1/4 mile but it isn't really why I built it... I'd say mid 12s would be about the mark though..

I'm about to install a knocklink, Sti scoop and splitter, then turn up the boost which might increase top end a little but I'm certainly more interested in midrange grunt.

When I get sick of the VF34 I'll put in the AVO400, but realistically I might just hold of until the 05 sti is released over here and start again :)


PS: schoolbuzz, for that price range the fastest spooling would be the VF34 (if chasing over 250whp) but if your budget stretches to the garrett based turbos go the AVO400.. Man you'll need some good supporting mods to get the most out of it...
 

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Discussion Starter #7
clutchcargo said:
Hi thegame,

As I mentioned the car drives a whole lot different to the way it did in the first round of mods.

Here's my website for the car: http://www.element.net.au/subi/

As you can see I have the full list of mods as well as 2 dyno plots showing the current Vs old tune (203awkw/167awkw). This is on Aussie fuel which is pretty good (98 Ron, but I think you guys average your Ron so it might be closer to 95).

The beauty is that this is only running 16psi, with a safe air/fuel mixture throughout (no pinging). This was tuned at AVO HQ over here (one of the benefits of living here) by Terry himself. I would say reliability is virtually unaffected (not including drivetrain.)

I have done just about everything to the car except for internals, so from start to finish:

AVO SMT6 ECU
AVO Pod
AVO Silicone Intake
VF34 Turbo
Apexi AVCR boost controller
Hyperflow TMIC w AVO BOV & Waterspray
STi 550cc injectors & Walbro pump
AVO uppipe
AVO Turbo back exhaust with stainless race cat
AVO steel backed heavy duty clutch

I would say the silicone intake and hiflow cat were responsible for extracting enough from the VF34 to get me over 200kwatw, and this is of course on 16psi, where I could probably run 18-19psi happily.

Put simply this car is simply a monster. :) 2nd gear runs on the stock suspension made it feel like a family car.. So I installed some H&R springs and I'll put in some swaybars.

I'd like to put it down the 1/4 mile but it isn't really why I built it... I'd say mid 12s would be about the mark though..

I'm about to install a knocklink, Sti scoop and splitter, then turn up the boost which might increase top end a little but I'm certainly more interested in midrange grunt.

When I get sick of the VF34 I'll put in the AVO400, but realistically I might just hold of until the 05 sti is released over here and start again :)


PS: schoolbuzz, for that price range the fastest spooling would be the VF34 (if chasing over 250whp) but if your budget stretches to the garrett based turbos go the AVO400.. Man you'll need some good supporting mods to get the most out of it...
I already have a VF39 installed. I need 350 whp, not 250 whp.

I found some interesting information:

Stock Turbo 360 CFM at 14.7 PSI
T3 60 trim 400 CFM at 14.7 PSI
IHI VF 23/24 423 CFM at 14.7 PSI
STOCK HYBRID 430 CFM at 14.7 PSI
IHI VF-22 435 CFM at 14.7 PSI
SR 30 435 CFM at 14.7 PSI
T04E 40 trim 460 CFM at 14.7 PSI
Small 16G 505 CFM at 14.7 PSI
Large 16G 550 CFM at 14.7 PSI
SR 40 595 CFM at 14.7 PSI
18G 600 CFM at 14.7 PSI
PE 1820 630 CFM at 14.7 PSI
20G 650 CFM at 14.7 PSI
SR 50 710 CFM at 14.7 PSI
GT-30 725 CFM at 14.7 PSI
60-1 725 CFM at 14.7 PSI
GT-35R 820 CFM at 14.7 PSI
T72 920 CFM at 14.7 PSI

IHI VF 23/24 388 CFM at 18 PSI
T3 60 trim 410 CFM at 20 PSI
IHI VF-22 460 CFM at 18.0 PSI
AVO 320HP 465 CFM at 17.5 PSI
T04E 40 trim 465 CFM at 22 PSI
SR 30 490 CFM at 22 PSI
Small 16G 490 CFM at 22 PSI
Large 16G 520 CFM at 22 PSI
AVO 400HP 580 CFM at 17.5 PSI
PE 1820 600 CFM at 22 PSI
AVO 450HP 650 CFM at 20.0 PSI
SR 40 650 CFM at 22 PSI
20G 695 CFM at 20.0 PSI
AVO 500HP 725 CFM at 23.0 PSI
SR 50 770 CFM at 22 PSI
GT-30 790 CFM at 22 PSI
60-1 800 CFM at 22 PSI
GT-35R 880 CFM at 22 PSI
T72 1000 CFM at 22 PSI

HKS GT2835 Turbo about 400 hp approx 580 CFM, pressure not specified
HKS GT3037 Turbo about 460 hp approx 670 CFM, pressure not specified
HKS GT3040 Turbo about 490 hp approx 710 CFM, pressure not specified
HKS GT3240 Turbo about 570 hp approx 830 CFM, pressure not specified
 

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look into the 18g. spools faster than the VF22, and flows as much as the power enterprise blowers. where you are at such high altitude, you'll need a turbo to compensate for the reduced PRs, and the mitsu turbos love high boost. the 20g may be another option, but you're going to be dealign with a lot more lag there...

290awhp on a VF34 is pretty darned high - especially w/o a front mount IC. were you on a mustang dyno?
 

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....the 18G doesn't flow 600 cfm at 14.7 psi...

and the vf22 flows 460 cfm at 18?


i think this is a typo because you dont even have the 18g cfm rating @18psi
 

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I made 310hp and 315ft tq at 20psi in Denver with a VF34, UTEC, Helix uppipe, dp, catback, UTEC, Perrin Inlet hose, TurboXS Intake, Vishnu I/C Hose's, STi Injectors, Walbro Fuel pump, and a TXS BOV.
 

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03SubaWRX said:
I made 310hp and 315ft tq at 20psi in Denver with a VF34, UTEC, Helix uppipe, dp, catback, UTEC, Perrin Inlet hose, TurboXS Intake, Vishnu I/C Hose's, STi Injectors, Walbro Fuel pump, and a TXS BOV.
corrected?


Originally posted by SsTiNgEr77
....the 18G doesn't flow 600 cfm at 14.7 psi...

and the vf22 flows 460 cfm at 18?


i think this is a typo because you dont even have the 18g cfm rating @18psi
really depends on how large the motor is. those numbers will vary depending on whether it's a 2.0L or a 2.5L
 

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My 290whp was recorded on AVO's Dynamic dyno (4wd) which is calibrated the same as the STi dyno here in Melbourne. Regardless of whether the figure is high or not I really only use dyno figures to compare against my other states of tune/mods.

It's not impossible nor dangerous to pull 300whp from a top mount IC as long as fuel mix and boost is considered carefully... The Hyperflow unit is MASSIVE and flows considerably more than the STi unit (with less of a pressure drop).

Schoolbuzz, sorry to rant and rave about 250 vs 350 whp, but without a clear notion of what you want to do with the car its hard to make a recommendation.

However, if you just want a target of 350whp on the dyno (at the expense of drivability) get one of the mitsu turbos and be done with it :) However if you want better spool characteristics, a gruntier midrange, and IMO a much better car I'd go with the AVO400s (320whp) or the AVO400L (350whp+), I think the AVO450 might see you over your threshold again at the expense of spool time etc..

On the street in most situations the AVO400s will actually walk away from the 450 (meaning by the time the 450 has fully spooled the 400s is already pushing serious boost). I think you'd be surprised at how poorly your car would drive with a much bigger turbo, thus my comments regarding exactly what you want the car for...

We don't really have to worry about altitudes and such here, however I would much rather a Garrett-based offering if I needed a more efficient turbo in terms of how it flowed.

My 2c :)
 

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Discussion Starter #15 (Edited)
I want 350 whp so I can run lows 12s and hopefully 11s at the drag strip. I plan on spraying nitrous also.

It would be nice if I could drive it daily without too many problems!

I am at 5800 ft also.
 

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shcoolbuzz, what is your tranny setup? do you know what spray + a big turbo + VHT compound will do to an oem transmission?
 

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Discussion Starter #19
MidnightFLAT4 said:
shcoolbuzz, what is your tranny setup? do you know what spray + a big turbo + VHT compound will do to an oem transmission?
The transmission will be taken care of. :D
 
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