esxboy1

hi there just wondering which turbo is best for more bhp with suportin mods?

scoobysmiff

iTrader: (2)

Td05 is a bit better for more power than VF28, more robust as well by all accounts! although the VF28 is supposed to be a very good turbo, drives very well from what i've heard

rigga

iTrader: (4)

vf28 max roughly 320,with good spool up but reported to have fragile blades when pushed to its limit..... td05 very robust and takes a lot of abuse,slightly slower spool but good for approx 350 or so.....

tsl202

hi mate sorry hijacking what about the VF23??

esxboy1

its just i just bought a modded scoob with a vf28 already fitted an was wodering beause ive heard people talking about the tdo5,

esxboy1

i have been imformed by a good tunr on here that the vf 28 was good for 350bhp with all my other mods

Jolly Green Monster

iTrader: (4)

what are the other mods?

stuart148

iTrader: (12)

iv got a my99 sti type r and mines running a vf28 at 274bhp at the wheels ,,,think this is about 350 at the fly

take a look at my spec on my profile

stu

New_scooby_04

iTrader: (4)

I've not heard of any 28's pushing out that kind of power.

If you've already got the 28 fitted I'd leave it there, not worth the expense to upgrade to the slower responding TD05 16G for the extra ponies it would offer IMHO.

Ns04

satanbaby

i got a vf23 newly rebuilt never fitted. i was going to use that over a vf35 that i have fitted now just for the roads around here and my driving style.
vf23 is the same one used on the 22b.
just want what i paid for it as my car... is no longer alive it died sat night

£250

harvey

iTrader: (48)

The performance of the VF28 and TD05 16G are quite similar in terms of power output. The VF28 may spool a little quicker and the 05 is more robust and easier to repair.
There is so little in it that I would not anticipate swapping a VF28 for TD05 16.

Izzy

I've had both on my STi5 R. The original VF28 was very quick to spool up & felt like it gave a "steady" increase in power through the rev range. The replacement TD05 has a little more lag, but then kicks in a fair bit harder...

Aztec Performance Ltd

iTrader: (234)

Ignoring dyno figures...TD05-16g can result in a far quicker car than a VF28

New_scooby_04

iTrader: (4)

Gearbox longevity is also more of an issue with the Td05.

Ns04

fireblade37

iTrader: (1)

Have have had vf28, vf35 and td05, imho worth swapping a 28 for a 05. The vf35 spooled slightly quicker (200rpm) max, but the td05 was far more brutal and gave you a nice push in the back. 15000 miles later on, still using a td05 no gearbox probs yet. The vf28 i found was quite boring in comparison. All three turbo's were mapped by the same mapper. You really need to of had all the turbo's to judge. But then again someone who has had all three might prefer the vf28/35.

B0DSKI

iTrader: (17)

More like 320-325 @ the wheels working on a realistic 18% transmission loss

stuart148

iTrader: (12)

fly wheel talk is pub talk,,,if every one talked wheel bhp, we would all no where we stand

as all cars are diff and all have diff transmission loss

stu

ps,,,ill take my 350 bhp thou

stuart148

iTrader: (12)

fly wheel talk is pub talk,,,if every one talked wheel bhp, we would all no where we stand

as all cars are diff and all have diff transmission loss

stu

ps,,,ill take my 350 bhp thou

dazdavies

iTrader: (22)

Its all about the supporting mods.
I managed to get 330 bhp out of a VF28 with 440cc injectors, TMIC, 2.5 inch exhaust system with tubular headers, standard sti5 engine with standard fueling apart from uprated Walbro with an APS cold air intake. All managed by an Andy F ecutek remap

After a rebuild with 93mm pistons(1mm oversize), 3 inch exhaust, parrallel fuel rails, sx reg, 740cc injectors, front mount intercooler, and a power fc mapped my Andrew Carr it made 358bhp / 330ftlbs still with a VF28 screaming at 1.5bar peak. Both were dyno'd on scooby clinics rollers.

I cant comment on the other 2 turbos but was more than happy with the results from the VF28 at the time. I would also like to note the car did approx 20,000 miles in this guise and no shattered blade stories to tell.
When the turbo came off to be upgraded there was still very little play in the shaft.

Food for thought.

Daz

esxboy1

ive got vf 28.fmc,hks full decat,uppipe,downpipe,headers,apexi 550 injectors,walbro,apexi cold air induction,apexi fc+comander,im havein a live map sesion on sat at mocop racing...i think thats what its called anyway lol. but asked him what power realisticy i could achive an he said around 350 mark

stuart148

iTrader: (12)

mine is the (nearly)same spec as yours mate (im running a haltec ecu),,iv not got the 550 injectors thou,,,,,,so lets see what your bhp is on sat

could you get a bhp at the wheels, aswell as the fly,,so i can compair

thanks

stu

esxboy1

can they give you bhp figures on a live map(on the road) will never go on the rollers dont like them.i thought you could only get bhp figures on rollers

The Fixer

No they can only guess at BHP they think it'll make, they also cant optimise your ignition curve for each load point on the road either but this has been covered in threads loads of time. Mapped on the road = smooth but not the best power, mapped on the rollers capable of steady state mapping like Dyno Dynamics and Dastek gives a more powerful car (no doubt about it~ proved hundreds of times) and then the car should have its boost control tweaked on the road and the map checked.

B0DSKI

iTrader: (17)

Zak will give you BHP @ the wheels from his mapping sessions and from people who've had him map they're car (me included) they are very very accurate, last time i heard someone who put they're car on a Dyno after having Mocom remap the car it was within 2 BHP

StickyMicky

i have had vf22/vf23/vf24/vf28 and td04/td05 on my car


infact i have just swapped the vf23 for a ported and polished td05 last month, i gained lots more torque (around 290lbft@ 1.4bar) and the torque comes in at around 4300 and holds till 6krpm, then i suspect the actuator was not tight enough as it dropped off (along with the power) at 7krpm it started climbing again (actuator closed?)

here is my graph



i have since adjusted the actuator so it now has some pretension, and hope to get another few power runs done sometime this week

tsl202

so how do rate the vf23??

esxboy1

what mods did you have to get that bhp mate

wrxcraig

i havent got the slightest idea of difference between my tdo4 andy forrest hybrid and the other 2but mine swirls up real nice and is a neck strainer upto 7k and sounds nice too.

tsl202

it's not my graph mate
actually i've a cat back kakimoto full mega n1 3.5" s/s, sti panel filter and max turbo pressure is 1.4bar, maintening 1.15bar till redline
don't think the ecu is chipped...but car pushed hard when i floor the pedal!!

esxboy1

nice one!! you soun like my kinda bloke