Rally fan 555

iTrader: (7)

Hi Guys, where is the type (number) of turbo I have fitted shown on my Bug......... prob dull question, but havn't had a good look yet, thought you prob would know.............. JDM 02. WRX.

wrxgreen

its on the side of the turbo on a small plaque mine a wrx bug and did have a td04 on it till 4 weeks ago

Rally fan 555

iTrader: (7)

Mmmmm thats what I'm thinking of , is it visible through heatshield at some point ? what did you go for in the end, what work was needed, I don't suppose it was a straight swap was it

wrxgreen

need to take the sheild off i had a full decat up pipe and a , vf 28 turbo straight swap for the weeker td04

wrxgreen

and sti pink injectors too

Rally fan 555

iTrader: (7)

Nice one What sort of benefits did you gain/see - forgive my ignorance but was the ECU sorted too ??

mr_D

iTrader: (12)

what turbo are you thinking of upgrading to?

Rally fan 555

iTrader: (7)

I'm not sure what to think of yet - I still have to find out what is attached at the moment , I need to know if any "swop" will require ECU tweeks i.e. remapping - ant changes to pipework etc, as I say, I am in ponder mode and unsure of whats out there at the mo, still have TMIC, panel filter upgrade and STD exhaust apart from the Firestorm BB.......

mr_D

iTrader: (12)

well i was speaking to my mate who is a subaru mechanic and he said i can upgrade my vf23 for a vf35 and still be able to run it with a power gain from it but i wouldnt get the full potential unless i was mapped. i have std tmic and hks dragger from cat back but with blitz filter

Rally fan 555

iTrader: (7)

You seem to have similar mods to me - is vf35 quicker to spool up over vf23, or is it more of an all rounder - I'm also confused over some having TD04/05's and the vf versions, is it to do with UK/JDM market cars I wonder..............and then theres your twin scrolls

mr_D

iTrader: (12)

i will ask him later. im sure he said it spools up quicker. i know the td's are supposed to be stronger turbos than the vf but the td05 is the stronger of the 2. im contemplating vf35 myself and think i maybe fitting it this weekend if not i will have one for sale and go bigger lol

Rally fan 555

iTrader: (7)

Thanks for that, please post how you get on, I have the added "ponder" about a turbo to go well with the 4 spd Auto/Tip box I have on my car, if you remember can you ask about the heat shield, if you can run without it, once taken off ??

mr_D

iTrader: (12)

of course you can run without the heat shield. but why would you want to?

Rally fan 555

iTrader: (7)

Just me being lazy - if I took it off (not sure how long a job it is yet) and it didn't realy need to be there, I would leave it off

mr_D

iTrader: (12)

i think its actually quite and easy job. doesnt take long as everything is there in front of you

Rally fan 555

iTrader: (7)

Nice to have an easy job on the Scoob for once - I will have a look when the Lordess has released me from my daily chores

mr_D

iTrader: (12)

good luck with that

wrxgreen

having a remap on the 20th hoping to see around 320 ish

would not want to run without the heat shield becaue the brake fluid res is right above the turbo all that heat imho

wrxgreen

vf35 is a standard sti7 turbo if i had a bit more cash would have gone for the turbo of a p1 think its a vf22

THE DOCTOR

iTrader: (2)

The heat shield is there for a reason..not a good idea to run without it..soz

The Trooper 1815

iTrader: (31)

You may want to have a look at this

VF22
This turbo has the highest output potential of all of the IHI VF series turbos and is the best choice for those who are looking for loads of top end power. The top end power however, does not come without a cost. The VF22 spools significantly slower than the rest of the IHI models due to the larger P20 exhaust housing and is much less suited for daily driving than some of the other models. Although the largest VF series turbo, the VF22 is not quite optimal for stroked engines or those who wish to run more than 20PSI of boost.

VF23
This turbo is considered a great all-around turbo. Like the VF22 it utilizes the largest P20 exhaust housing. This housing is mated with a smaller compressor housing of the of the VF24. This turbo is considered optimal in applications with range from mild to slightly wild. It does not have the same top end power of the VF22, but spools up significantly quicker.

VF24
This turbo shares its compressor housing with the VF23 however, this housing is mated with a smaller (P18) exhaust side. The smaller characteristics of this turbo allow it to provide ample bottom end power and quick spool. This turbo is very popular for Imprezas with automatic transmissions and Group N rally cars.

VF28
This turbo came standard on the STi Version 5. In terms of overall size, it is smaller than the VF22, VF30 and VF34, and about same size as the VF23.

VF29
This Turbo is nearly identical to the VF24, with the same compressor and exhaust housings. However the compressor wheel in the VF29 is has been changed slightly. The changes made to the compressor wheel in this model are generally viewed as improvements, and as such this unit is typically chosen over the VF24.

VF30
The VF30 is commonly considered the best bang for the buck turbo in the IHI VF series line. A relatively new model the VF30 features the same exhaust housing as the VF24 but a larger compressor side similar to the VF22. The combination of these two parts results in increased output potential without the lag associated with the VF22. Although it doesn't offer the top end supremacy of the VF22, the VF30 is a great compromise between these unit and the quicker spooling models.

VF34
The VF34 is nearly identical to the VF30, with the same exhaust housing and compressor. However the VF34 goes back to the ball bearing design, and in doing so achieves full boost approximately 500RPM sooner than the comparable VF30. The VF34 is the most recent IHI design and as such costs slightly more than its counterpart. Top end performance and maximum output are identical to the 30.

VF35
The VF35 has identical internals as the VF30 and it uses divided thrust bearings. However, the exhaust housing is a P15 which means this turbo will have fantastic spool characteristics. This turbo is standard on the new WRX Type RA. LIMITED SUPPLY.

VF36
Roller bearing version of the twin scroll VF37, also has a titanium turbine and shaft for even quicker spool. Same compressor housing as VF30/34, however twin scroll P25 exhaust housing provides slightly better top end output due to reduced exhaust pulse interference. This turbo is good for 400HP and used on JDM STI Spec C from 2003 onwards.

VF37 (thrust bearing)
Enter the age of twin scroll IHI turbos. Same compressor housing as VF30/34, however has a new twin scroll P25 exhaust housing that provides slightly better top end output due to reduced exhaust pulse interference. Twin scroll also provides better spool up for improved low down response over the VF30/34. This turbo is good for 400HP and used on JDM STI from 2003 onwards.

VF38
Twin scroll turbo with titanium turbine and shaft. Smaller compressor housing than VF36/VF37 provides tremendous spool up capabilities but less top end than VF36/37. The spool capabilities of this turbo are demonstrated on the JDM Legacy GT, which reaches peak torque at 2400RPM.

VF39
Single scroll turbo used on USDM STI and latest 2.5L STIs released internationally. Smaller than VF30/VF34.

VF42
Exclusive turbo to the S203/S204 models, this features a twin scroll design with a slightly larger compressor than the VF36/37 turbos and different turbine design (more blades). The VF42 is a roller-bearing turbo and is likely of similar size to the VF22 turbo, but with twin scroll exhaust housing for faster spool and superior top end performance due to reduced exhaust pulse interference.

PE 1818 The 1818 supposedly comes on boost extremely fast...which make it great for road racing or aggressive driving (remember to be responsible :^). The 1818 maxes out somewhere between 350-375 hp.

PE 1820 The 1820 is larger than the 1818 and is capable of running more boost, but at the expense of more turbo lag. Expect it not attain full boost until you have passed 4000 rpm. However, it can be tuned to 400+ hp.



IHI & Garret Turbo Specs
Model Type Compressor Inlet Diameter Compressor Housing Nominal Turbine Housing Turbine Approx A/R Compressor Wheel Blades Turbine Wheel Blades Waste Gate Actuator Turbine Casting ID & Batch
VF22 Roller Bearing 48.5 A 9.4 PZ20-H 94001 0.71 5 11 C395 H, H4
VF 23 Roller Bearing 46.7 B 9.4 PZ20-H 94001 0.71 6 11 C395 8psi TBA
VF 24 Roller Bearing 46.7 B 9.4 PZ18-H 94001 0.63 6 11 C418 8psi H, S4, 66
VF 30 Bronze Bearing 47.9 C 9.4 PZ18-H 94001 0.63 6 11 C484 H, S4, IC F55
VF 34 Roller Bearing

Garrett 400 Ball Bearing 53 - - Outlet Dia 51.5 - 7 9 11 psi
Garrett 450-500 Ball Bearing 53 Outlet Dia 46.9 - 7 10 14 psi




Turbo Type ----------- Approx flow @ pressure
Stock Turbo ---------- 360 CFM at 14.7 PSI
IHI VF 25 ------------- 370 CFM at 14.7 PSI
IHI VF 26 ------------- 390 CFM at 14.7 PSI
T3 60 trim ----------- 400 CFM at 14.7 PSI
IHI VF 27 ------------- 400 CFM at 14.7 PSI
IHI VF 24/28/29 ----- 410 CFM at 14.7 PSI
========= 422 CFM max flow for a 2 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
IHI VF 23 ------------- 423 CFM at 14.7 PSI
FP STOCK HYBRID -- 430 CFM at 14.7 PSI
IHI VF-30 ------------- 435 CFM at 14.7 PSI
SR 30 ----------------- 435 CFM at 14.7 PSI
IHI VF-22 ------------ 440 CFM at 14.7 PSI
T04E 40 trim -------- 460 CFM at 14.7 PSI
========= 464 CFM max flow for a 2.2 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 rpm =======
PE1818 -------------- 490 CFM at 14.7 PSI
Small 16G ------------ 505 CFM at 14.7 PSI
ION Spec (stg 0) --- 525 CFM at 14.7 PSI
========= 526 CFM max flow for a 2.5 Liter at .85 VE pressure ratio 2.0 (14.7 PSI) 7000 RPM =======
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 <--- Note you would have to spin a 2.0 L engine at about 14,000 rpm to flow this much air.
IHI VF 25 ----------- 395 CFM at 18 PSI
IHI VF 26 ----------- 400 CFM at 18 PSI
T3 60 trim ---------- 410 CFM at 20 PSI
IHI VF 27 ----------- 420 CFM at 18 PSI
IHI VF 24/28/29 -- 425 CFM at 18 PSI
IHI VF 23 ----------- 430 CFM at 18 PSI
IHI VF-30 ----------- 460 CFM at 18.0 PSI
AVO 320HP -------- 465 CFM at 17.5 PSI
T04E 40 trim ------ 465 CFM at 22 PSI
FP STOCK HYBRID- 490 CFM at 18.0 PSI
IHI VF-22 ---------- 490 CFM at 18.0 PSI
SR 30 --------------- 490 CFM at 22 PSI
Small 16G ---------- 490 CFM at 22 PSI
ION Spec (stg 0) - 500 CFM at 19 PSI
PE1818 ------------ 515 CFM at 22 PSI
Large 16G --------- 520 CFM at 22 PSI
========= 526 CFM max flow for a 2 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
========= 578 CFM max flow for a 2.2 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
HKS GT2835 ------- 580 CFM at 22 PSI 400 hp
MRT 400 ------------ 580 CFM at 16 PSI
AVO 400HP -------- 580 CFM at 17.5 PSI
MRT 450 ------------ 650 CFM at 19 PSI
AVO 450HP -------- 650 CFM at 20.0 PSI
SR 40 ---------------- 650 CFM at 22 PSI
========= 658 CFM max flow for a 2.5 Liter at .85 VE pressure ratio 2.5 (22 PSI) 7000 rpm =======
HKS GT3037 ------ 670 CFM at 22 PSI 460 hp
PE 1820 ----------- 680 CFM at 22 PSI
20G ---------------- 695 CFM at 20.0 PSI
HKS GT3040 ----- 710 CFM at 22 PSI 490 hp
AVO 500HP ------ 770 CFM at 22 PSI
SR 50 ------------- 770 CFM at 22 PSI
GT-30 ------------- 790 CFM at 22 PSI
60-1 --------------- 800 CFM at 22 PSI
HKS GT3240 ----- 830 CFM at 22 PSI 570 hp
GT-35R ----------- 880 CFM at 22 PSI
T72 --------------- 1000 CFM at 22 PSI <--- note you would have to run a 2.0 L engine at >40 PSI boost to flow this much air
Conversions used where there was control over conversion factors:
1 HP approx equals 1.45 CFM
1 CFM approx equals 0.0745 lb of air/min
0.108 Lb/min approx equals 1 hp
1 Meter cubed/sec = 35.314 CFS = 2118.867 CFM
1 KG/sec = 132 lbs/min approx equals 1771.812 CFM
power coversions:
1 PS = 0.9859 HP = 75 Kgf m/sec
1.3405 HP = 1 KW
1 HP = 746 watts

THE DOCTOR

iTrader: (2)

WOW............

Rally fan 555

iTrader: (7)

Ditto WOW ! Flippin eck what a write up eh, nice to know it's there...........bang on about the shield Guys - I'll put it back when it's off, don't want to be lazy over important stuff

Rally fan 555

iTrader: (7)

That will be a nice power hike, I'd like a safe 300 hp on mine - whos remapping for you brake fliud and turbo heat, not cl

Cannon Fodder

iTrader: (100)

I am having my car remapped by Bob Rawle soon and was going to look at changing the turbo changed towards Autumn but having read the post by Blue Dragoon I am now more confused than ever.

Has anybody fitted a twin scroll turbo to a 2.5 WRX, and if so how does it perform as I really like the sound of the characteristics of the twin scroll turbos. Also which type did you fit?

wrxgreen

its already been mapped by jgm @278 bhp going to power station just to have the fueling and few bits done

Rally fan 555

iTrader: (7)

Hi - are those two Mappers far away ??

Cannon Fodder

iTrader: (100)

Both offer a mobile service, there is a group buy which you can find listed in marketplace/group buy section for Bob Rawle which is going ahead for the 10th of May probably in the Cardiff area.

If you are interested then have a look, the group buy is offering over a £100 saving on the normal price.

Rally fan 555

iTrader: (7)

Thanks for the heads up on that one mate It's a bit early for me at the mo - as still thinking of my next move, mod wise - got to get the exhaust sorted next

Cannon Fodder

iTrader: (100)

Try Prospeed exhausts in Cardiff speak to Charlie , he built my exhaust system - 3" system with a 100 cell sports cat and open neck downpipe, stainless steel throughout mated to my own Prodrive silencer.

It made the world of difference to my car the turbo spools up a lot quicker as it is not restricted by the standard downpipe . All his exhausts come with a 20 year warranty and are built by hand on the day to your requirements.