VF52 Turbo

[Jimmy S]

Fair and valid points Fellas!

I agree that there is some market for people interested in an extra ~20hp without sacrificing low end power, and not everyone is chasing my magic 300.1hp @ all 4!

I've gotta say I'm a little skeptical of the VF52 being less time/effort to install than an equivalent larger bolt on turbo though!? In my mind, if you are fitting a larger turbo, then you are going to want to get the most out of it, which to me means at least improving the intake/exhaust flow and intercooling efficiency and possibly improving fuel supply depending on how hard the VF52 can push!
If you are going to fit the VF52 without making additional improvements, the cost of supplying & fitting the turbo, plus tuning would make it incredibly inefficient from a cost point of view!?

If you are going to work on getting the most out of the VF52, then it will be much the same as fitting the larger bolt on snail!? With the possible exception of decapping the injectors, the VF52 will be as much work to get the most out of as a TD05/TD06 bolt on replacement.

My lib will be going in for a bolt on Zage TD06 20G, PSR TMIC, Walbro fuel pump, decapped injectors and a retune(probably include an upgraded MAC as well) and I don't expect it to be at Allstar for any longer than a day!?

Anyway... I just like talking about big turbo's!

[lozza]

Yer guys Jimmy was talking about me....I've just been a slack arse and haven't posted up my latest mods but I have been busy installing Jimmy's old tein s techs & billies after doing turbo and tmic upgrade and gutting my sti muffs.

I went the vf52 path because I wanted a true direct bolt on without to much off road time,didn't want to put too much pressure on the 2.5 internals and wasn't chasing HUGE power figures..I installed it while watching the v8's on the gold coast and retuned at asg the following wednesday.

254hp at the hubs and a bit more top end up from 242...no change in torque 371.6...safe tune with 1.2bar boost and a/f 12.2

tuner was pretty happy with result and said car was never short of fuel, std fuel pump and injectors weren't maxed at.

YES, I expected more but at the end of the day a blown motor isn't that quick or cheap

scary...I got my vf52 from seller on legacy.gt site but there's a few US suppliers that sell them like fredbeanparts and importimageracing to name a couple...and with our $ so high it's a good time to buy over there...happy shopping.

got a bnib avo tmic at the same time from same site cheaper incl shipping than from avo OZ...cos the oem plastic side tanks are a weak point.

car is awesome.......very happy bum dyno feeling.

each to their own.........go Jimmy go

[blacktop™]

hey jimmy how much power do you think you'll have with your new setup?

[fatfrog02]

SM177 got some good results with VF52, TBE, panel filter and tune.

viewtopic.php?f=21&t=7362

[Jimmy S]

hey jimmy how much power do you think you'll have with your new setup?

We'll see, as it really depends on how hard we push the fragile EJ255... With big boost, I'm sure it could make well over 300hp, but how long would it last?

I'll leave it up to Sean how much he thinks the motor can take on a daily basis, and hope that it's more than 300hp! I'll be quite chuffed if it makes anything over 310hp at the hubs though!

There are really too many unknown variable's though, I'm not sure how efficient my exhaust is, as its far more restrictive than any I've ever used before!? Plus I've not seen how much the larger TMIC is going to be able to improve cooling?

It's hard for me not to compare to my previous setup on the 2L WRX with the smaller TD05 turbo, but including headers, FMIC and a significantly free-er flowing exhaust which made 299.3hp @ the hubs.
It's all about how much improvement comes from the larger 2.5L motor and TD06 turbo compared to any losses from using a TMIC, stock headers(at this stage) and the more restrictive exhaust system!?

I guess we'll find out at the end of the month!

SM177 got some good results with VF52, TBE, panel filter and tune.

viewtopic.php?f=21&t=7362

More improvement on the original figure, but the original figure was most likely untuned with a cat-back exhaust as oppose to going from a tuned car with full exhaust already!?... Basically just saying that the improvement he got was not just from fitting the turbo!

Still, so long as you get what you want out of it, why not!?

[Gambit]

Looking forward to the results Jimmy!

Hopefully by early next year i'll have in my sweet little hands a TD06SL2-20G with billet comp wheel. So it will be a good comparison, even though its a smaller turbo than the TD06, it should be up there, in comparison with my front mount. I am hoping it makes decent power with a reasonably responsive bottom end, as have equal length headers. Fuelling wise i have opted for ID1000's so should not be a problem, may get a fuel pressure reg as well to make sure i am all evened up.

Giddy with excitement

[scary]

Any thoughts on the HTA68 Hybrid from BNR??

http://bnrsupercars.com/

[Jimmy S]

Any thoughts on the HTA68 Hybrid from BNR??

http://bnrsupercars.com/

Seems a bit like re-inventing the wheel Shano?

Why not just go for one of the many bolt on options available?

[Boxer]

Not me... I'll leave it to him if he wants to post up himself, but from what he told me(and I remember), power went from ~240hp to ~252hp on the ASG dyno.

Should have been a much gap than that - and from mid-range up, not just top-end. Unless boost has been reduced with the 52 - One 08 GT I know of got the same peak power with the VF52 running 14PSI as the VF46 running 17PSI, but made heaps more midrange on the VF52

The VF52 is a far more capable turbo than the 46. I wouldn't go any bigger and lose driveability

[Jimmy S]

Not me... I'll leave it to him if he wants to post up himself, but from what he told me(and I remember), power went from ~240hp to ~252hp on the ASG dyno.

Should have been a much gap than that - and from mid-range up, not just top-end. Unless boost has been reduced with the 52 - One 08 GT I know of got the same peak power with the VF52 running 14PSI as the VF46 running 17PSI, but made heaps more midrange on the VF52

The VF52 is a far more capable turbo than the 46. I wouldn't go any bigger and lose driveability

Laurie has posted his own thoughts above mate! No-one is going to dispute that the VF52 is a better performing turbo than the factory VF46. I think what we are discussing is the benefits of upgrading to a VF52 vs a larger aftermarket alternative.

For the record, I disagree with your comment on losing driveability going to a larger turbo than a VF52!? TD05 20G is IMO the perfectly matched turbo for the 2.5T.. should make close to 300hp and come on strong from under 3000rpm. That is the perfect motor/turbo combo for my mind...
I think people buy into the "losing low end power" far too much with a larger turbo. They often think, that just because it's not on full boost until later in the rev range, its going to be sluggish or not make any power until that point. This is absolutely not the case, and until you drive a car with this sort of setup, and drive it properly, you probably won't realise how little difference it makes to driveability.

You may then ask why I am going for the bigger TD06 compressor, and that is purely because I want a big stab in the guts, and don't mind waiting until 3500rpm

[Boxer]

See I call 3000rpm mid-range..........and I've had a TD05 in a Subie before too, they are better than a TD04 which is under sized, but the VF52 has a nicer curve IMHO


............And I've had an 02STi where the 'hit' or stab in the guts you call it occurred at 3800rpm and was a BIG hit. Pain in the arse on the street - It was the worst Subaru motor/combo I've owned, but on a race track it was awesome. I only wish the diffs from it were in my Liberty

Depends what you want - horses for courses, but if I was race oriented still, I wouldn't have a Lib anyway

[scary]

Any thoughts on the HTA68 Hybrid from BNR??

http://bnrsupercars.com/

Seems a bit like re-inventing the wheel Shano?

Why not just go for one of the many bolt on options available?

it is a bolt on jimmy

essentially it's a vf40 with fp hta68 guts and an 8cm housing

[Jimmy S]

See I call 3000rpm mid-range..........and I've had a TD05 in a Subie before too, they are better than a TD04 which is under sized, but the VF52 has a nicer curve IMHO


............And I've had an 02STi where the 'hit' or stab in the guts you call it occurred at 3800rpm and was a BIG hit. Pain in the arse on the street - It was the worst Subaru motor/combo I've owned, but on a race track it was awesome. I only wish the diffs from it were in my Liberty

Depends what you want - horses for courses, but if I was race oriented still, I wouldn't have a Lib anyway

Fair enough mate, if everyone had the same opinion life would be pretty boring! I don't quite understand what you mean by the VF52 having a nicer curve than a TD05 20G though?

2.5L is a bit more driveable down low with less boost IMO... Plus the stock cams/heads on the 02 STi's are not great with a big turbo attached as it really does feel like there's nothing until your on boost.

It comes down a bit to your driving style as well... We could go on and on about this, but lets just put it down to a difference in preference.

Any thoughts on the HTA68 Hybrid from BNR??

http://bnrsupercars.com/

Seems a bit like re-inventing the wheel Shano?

Why not just go for one of the many bolt on options available?

it is a bolt on jimmy

essentially it's a vf40 with fp hta68 guts and an 8cm housing

Give it a crack then Shano!? You've got plenty of cash!

[scary]

Give it a crack then Shano!? You've got plenty of cash!

not as much as you it would seem - well at least not for car modding at the moment.

I am thinking it might be a god compromise though.

Why oh why can't I just get a twin scroll with BB cartridge that bolts up then I would be happy!

[blacktop™]

Doesn't 300hp = 200kw?

So if a vf52 can net 212kw wouldn't your td06 easily make over 300hp atw?

Or was that another case of 'the pulse dyno'?