Floyd

iTrader: (9)

You're having a larf 275lbft lol

Yes, if you convert it then it will be 275 but I would like to think you know better than to believe that figure when you should know how it is produced!

WRC came up with 310+lbft for the same spec. Remember this is at 1.2ish bar IIRC. Ooops, i've just compared RR's

About the same power band too then. I still can't see the graph? Is it as flat?

F

Andy.F

Very similar, just a few hundred rpm earlier hitting 300. Can you see it on the other thread ? maybe my link ?
https://www.scoobynet.com/general-te...id-td04-2.html

Floyd

iTrader: (9)

Strange, after opening the 'esnips' page I can now see it! Anyway, agree that it comes in earlier and has a similar broad torque curve. it probably would have driven very similar on the road. I don't know the full spec though I(size and type of exhaust?

The difference as I see it, is that I got there with less boost, on smaller injectors and standardish resonated 2.5 exhaust. What I'm saying is with more boost, a proper decat exhaust and perhaps more fueling then I would see the top end of the VF35's potential, whereas the TD04h is having it's neck rung

If I'd known the potential of the TD04h then I may have tried it and saved some cash...

F

Andy.F

Yes I agree the VF35 will go on to make more power and torque, it just happens a bit later in the rpm range and is slower to respond than the 04hy but it still spools quicker than a TD05 with like for like mods.

andythejock01wrx

Ok Andy,

What difference would I notice exactly between a VF35 and TD04H in terms of spool up revs and max bhp ?

I have a green bugeye 01 WRX which you remapped to 273bhp in July. At the mo it simply has H & S centre decat and WR backbox. Mapped on Optimax.

If I was gonna do anything more I'd probably get a sports cat down pipe and remove the up-pipe cat.

Your thoughts would be much appreciated !

Andy Mc

Oh, and what can the gearbox cope with anyway ?!

jasonius

iTrader: (1)

IMO performance wise there wouldn;t be much in it and would depend how you like your power delivery. ie TD04h has slightly more low down response and VF35 has slightly better top end ability. My VF35 still pulls like a train beyond 6k.

One thing that I'm not sure about is how hot the charge temps would be from the TD04H without an upgraded IC, although you'd still need to upgrade to get the best out of a VF35..

They both make VERY good real world fast raod cars and with their response the ability to supprise much bigger BHP cars ..

With regards to the gearbox, I'm hoping that my 05 WRX has the same 'uprated' box as fitted to the 06 WRX 2.5 (PPP supposed to produce 310ft-lb)..

rentonone

iTrader: (1)

i get that chuffing noise with mine to, ive got the same spec as you had with your vf35 except ive got a standard inlet pipe, mine mainly chuffs in fourth gear. its happend ever since i fitted the vf35. is this something to worry about and can it be sorted? what exactly is it?.. james

jasonius

iTrader: (1)

Haven;t noticed this trait with my VF35 although it does whine, which TBH I quite like..

Occasionally get a little fluttering of the boost needle at peak if I go WOT, low rpm, in say 4th. Apparently is not a problem, just down to the smaller P15 hot side..?

jasonius

iTrader: (1)

Rentonone:

Is your VF35 WG ported..?

cookstar

iTrader: (6)

Theres a brand new td05 16g on fleabay, which i am bidding on and intend to win, would it be worth porting before fitment

scooby_matt

I bought my TD05 brand new from Scoobyclinic, and this has been ported. Not sure why, but if the ones they supply are ported, there must be a good reason for it.

Floyd

iTrader: (9)

Rentonone, I haven't had a satisfactory answer on what the long term effects of surge will be. I haven't see any reports of a VF35 exploding but I'm sure if you talked to some of the specialists then they may have stories about VF35's, but then again they will have stories about all turbos. What you may not get is the full picture and what causes the problem that makes any particular turbo expire.

The conclusion I came to is if your happy with the upgrade and you have the correct supporting mods and most importantly, the map to go with it then the risk is no greater than anything else going wrong IMO.

I ran mine like it on track days and twice at the Ring, with high speed return trips and mine was OK. When I took it off and inspected it, it was fine. I haven't seen any other problems elsewhere either.

Cookstar, I would port it if it was mine.

F

rentonone

iTrader: (1)

yes mate, its ported, the boost was fine in normal weather but overboosts in this cold weather.

rentonone

iTrader: (1)

cheers Floyd. Ive had this chuffing noise ever since it was mapped by powerstation with all my mods and the vf35 turbo about nine months ago, ive just thought all along that the noise had something to do with the extra cold air feed pipe i put on the side of my airbox, heres a pic..

http://i16.photobucket.com/albums/b4...n/100_0712.jpg

i thought it might of been the sound of the air getting sucked through the flex as its not a smooth surface, but now as you say it could be the turbo causing it to surge, i will just see how it goes and see if any other people comment. heres my spec...
tek 3
vf35 turbo
ported and wrapped headers
greddy up pipe
sti8 intercooler
intercooler fan
large scoop
custom undertray and air splitter
walbro pump
parallel fuel rails
ported throttle body
inlet manifold insulators
hks pannel filter
airbox mod with extra cold air feed on the side
prf7b spark plugs
ic spray set up with 4 nozles
3 inch open neck downpipe (wrapped)
decat centre
newage prodrive back box.
oil catch can
earthing mod

james

Floyd

iTrader: (9)

The spec looks familiar!

F

cookstar

iTrader: (6)

Do you know how much it is, as i will have some ported headers soon, so would be nice to keep the theme going

jasonius

iTrader: (1)

If you have the tools it's piece of pi55 to do yourself as long as you know what to take off (common sense really), so I wouldn't expect to have to pay more that a good drink for someone to do it for you..

See Floyd's project ~pg3 iirc where he describes porting a VF35.

Rentonone: How loud is this chuffing noise you're describing..? The VF35 is a noisy turbo and with the air box mod you have will be louder still IMO. Just wondering if it's not just that and not actually surging..? Do you have a boost gauge..?
Nice spec, as F says very familiar.. What figs did you get from PS..?

rentonone

iTrader: (1)

i got 310.5bhp and 371mn of torque which i think is about 275 lb/ft at 1.25 bar boost. The chuffing noise is definatly quite loud, if it is the turbo that it noisy wouldnt it be more of a constant sucking noise insted of a chuffing noise.. im going back to ps in january for a map tweek so i will see what they say about it too.
james

Alan Jeffery

Re chuffing.. just a thought, what sort of dump valve do you have on there?

rentonone

iTrader: (1)

its now got a forge vta dumvalve on but the chuffing is no different to when the standard sti8 recirc was on there.

Saxito VTR

VF35

341 hp @ 5.808 rpm
459 Nm @ 4754 rpm

jasonius

iTrader: (1)

don't forget the headers pulse gases into turbo (hence the scoob burble) so you do get more of a chuffing than constant whistle iyswim.

does your boost gauge 'pulse' also..?

rentonone

iTrader: (1)

very true, i didnt think of that, the boost guage does stay pritty still i think, i will have a better look next time im in it tho.

rentonone

iTrader: (1)

nice, what car and mods have you got? they are good figures especially the torque, thats about 340 lbs/ft of torque i think.

jasonius

iTrader: (1)

If your boost gauge isn't fluctuating then IMO everything is normal..

If your cooling hose is easy enough to remove from the air box, you could try temporary blanking the hole off with thickish cardboard and gaffer tape..? See if that make it any quieter..

Andy.F

The VF35 is surge prone between 3000 and 4000 rpm if the boost is pulled in hard.
There are three distinct stages of surge. For want of a better description I'll call them audible, visual and physical.
The audible one is not normally a problem, it just sounds like a light chuff chuff from the induction and is of short duration at relatively low rpm.
Once it becomes visual, ie once the boost gauge starts fluttering, its starting to become more of a concern, this means the airflow signal is also wavering which in turn will affect ignition timing and fueling. If this continues for more than a second or two then it needs attention. Once it gets to the physical stage, then the boost, ignition and fueling ripples start to affect power and the car itself starts to judder or pull back. By this point you can start to do some damage to both the turbo and the engine.

Larger than std intake pipes and induction systems are the number 1 cause of surge in my experience. Delaying the boost rise rate can help but it is not ideal as you are probably losing out on midrange torque.

Andy

New_scooby_04

iTrader: (4)

Just throwing my experience in the hat:

I have a VF35, std induction (does an uprated panel filter count?), Samco pipes (std size AFAIK) an I have no issues with surge. The VF35 is a noisy blighter, but I quite like that!

Ns04

Floyd

iTrader: (9)

I believe mine was audible. I don't remember boost any gauge fluctuations and I didn't detect any physical properties. Paul thought he could feel something but I drove the car and couldn't feel anything other than smooth delivery.

My boost gauge does flap around with the TD05 incidentally, on full boost though. That may be the cheepo gauge that I have!

Andy, thanks for the explanation. The first I've seen on the forums

F

Saxito VTR

Euro GT MY98
4-1 Headers
3" Full exhaust
VF35 Turbo
440cc injectors
Apexi AVCR
Apexi Power FC ECU
Forge BOV
Hybrid FMIC
JDM Ver8 block

~~ Cal ~~

Here my post remp report from the SIDC > it was this thread that made me finaly opt for the VF35



Was down at Dr. Forrest surgery today for my 3rd ( a final ? [:P]) remap ......
Roads were bone dry and the air temps were low with exceptionally quiet roads
The car has been transformed into something I am almost scared of now.....
Making 305 bhp & 300 ft. lbs torque and 1.0 bar boost @ 2800 revs ( 1.3 bar by 2950 revs).
I will do my usual Dastek Dyno benchmarking soon for curves comparisons with the previous remaps
Almost exactly the same power and torque than an STi8 with PPP but in a lighter car with
a 5 speed box. ( http://www.prodrive.com/up/03MY%20STi%20PPP.pdf)
I was worried about the turbo being laggy before I got my remap but the fact it that it's more torquey
off boost than with the TD04 fully compensates. The VF35 is on full boost before 3000rpm and on song only 500 rpm later than the TD04.
Where the TD04 went to sleep the VF35 kicks off. At 4000 revs it surges right up to the limiter. 3rd gear is pure shax ...
And then the party piece. Andy enabled the disabled the fuel cut overrun ( or whatever it was called) in the Ecutek software
to let me see ( or should I say hear !) what it was like. Farkin' hall.............sounds just like anti-lag when you lift off ( with a hot exhaust). We were teetering like a couple of schoolboys after a quick sprint and the inevitable pop-bang routine. We are not just talking about the odd random pop - these are full on, guaranteed, on demand and numerous. Sadly I opted to have it disabled as the novelty would have worn off and it was just a bit too frequent. Ecutek really should have the functionality switchable via the aircon button or something. Then their license sales would go nuts
So all in all, the car is running sweet and I am well chuffed. Canny wait to see how she performs at the Ring.
A HUGE thanks go to Andy and Wuz for their combined wizardry ........[Y][<)]
Engine Mods for info :-

• IHI VF35 turbo ( ported to deter boost creep [8-|])
• Walbro fuel pump 255
• TSL WRC Sportscat
• Decatted up-pipe
• Straight through 2.5" pipework
• ScoobySport BB
• K&N Panel filter
• Samco intercoolerhoses
• Recirc DV

Nailing it outta the Forth Road bridge toll was a total gas []

Thanks to all you lot too for generally being a bad influence. Thanks to you jokers I have gone from 215 to 230 to 250 to 305 bhp.

Cal