Trying to decide on a turbo boys, i like the charactaristics of my td04 - ie been able to do motorway miles on little or no boost at all

what experiences do you have with the above turbo's, and can you tell me sort or what RPM they boost at, so i could keep the charactaristics of the td04 - and if you reccomend a td05, which gram would you go for, ie 16/18g/20g

whats best for what i want? car was remapped to 1.2 bar btw so poor little td04 didnt know what hit it

 

what do you want? big power? early spool? aggressive?

dont really say apart from you want td04 charactaristics.

imo go for a vf 34 if you want early spool as its roller bearing. i have a vf35 and its great to drive but the other 2 turbos seem to be better.
the td05 18g will gain you most power i believe and would be my choice. the 20g would be 2 big for your current setup imo

hth

 

Looking for a turbo to support 330ish bhp, iv got fmic, walbro fuel pump, 3' turbo back, need a bigger turbo now and another remap - possibly an apexi AVCR too

so erm, biggER power, with the ability to do 70mph on the mway off boost? if possible! i know i cant have everything

 

Vf34 or try a MD321H ....at a cost though (1200ish )

 

1st vf34
2nd td05 16g
both available cheap as chips

 

Id go for the tdo5 16g myself much stronger turbo but the vf34-35 r great turbos

 

ive recently done this upgrade from my mapped td04 running 1.2 bar,i was in the same position not sure on which turbo to go for,after several hours reading on this site i decided to go with the vf35 as it's a very quick spooling turbo.
now running 1.4 bar turbo kicks in very quickly holding all the way to the redline.
it is now a very quick road car

 

if spool is a priority then VF35 is the best, will make 330 comfortably with supporting mods, can also be had significantly cheaper than VF34.

Ns04

 

which turbo kicks in the latest? td05?

 

I got the VF34 on mine but cannot compare with any other, apart from the TD04 of course, LOL.
Very good. Well, it is now Bob has mapped it.

 

Oh, and dont forget you could always go for the TD04 Hybrid from Andy F.

 

i used to run a vf35(standard on sti) and now have a td05/18. The td gives a much harder punch in the back, Much more torque/power etc . The spool up difference is so minimal that its not noticable during driving but the td may show 2 or 300rpm later on a laptop

 

theyre expensive the td05's but it sounds like what i want, the vf 35 sounds very good but i didnt want extremely early spool if im on the m-way

not sure wether to just settle on a vf34

 

you do know you can drive off boost even high up the rev range by not applying as much throttle, don't you?

 

guy on here selling a fto5 16g for 50quid, just taken out of his 96 impreza

 

Has anyone asked about the gearbox yet; if he puts a 18G on an original high mileage 00 box, I give him all of about 3 days before he's posting about needing a replacement box!

 

You cannot compare an unmapped VF35 to a mapped TD05 18g (or even a mapped VF35)..!

Out of the turbo's mentioned, if it's a 'real world' fast road car the you can't beat the VF35 IMHO.. A TD04H would be another option. Remember it's not always about the peak figures, especially on the road.

And yes, ANY turbo should be able to cruise at high speed off boost. In fact, if anything a TD04 would be working harder due to it's smaller size, IYSWIM..?

BTW my TD04 was mapped to 1.5bar and never missed a beat. Make sure you get the right map, whichever turbo you choose, as this make the most difference..!

 

OO! Yeah a high mileage Classic and a TD05, hmmm, gearbox time, lol.
I have no boost issues on the VF34 at motorway speeds, but then again, i didnt have any with the TD04 either. If anything, the TD04 gave a more instant response actually if i needed it at motorway speeds, whereas the VF34 boost is a little later up the rev range and so that makes a difference too.
I would say if you think you are driving on boost with the TD04 on the motorway, then no sarcasm intended, you are driving too fast anyway.
Less loud pedal = no boost. Its simple.

 

I can as they were both mapped to 1.5 bar with same mods other than injectors. The td has so much more puff at the top where the vf ran out. And there Know noticable difference in spool.

 

Td05 18 G bigger turbo so will have more top end.

300-400rpm difference in boost threshold might not sound much, but on the road it's quite a bit; like going from a Td04 to a bigger VF series turbo - you soon learn to drive around it, but there is a difference.

VF35 very good compromise between spool, outight power and chances of a non sti gearbox not saying cheerio IMHO. at 70 Mph on the motorway in fifth, about 2800rpm IIRC, prod the loud pedal and the car surges forward with conviction. Drop into 4th and it charges to 120mph very quickly....as an M3 recently found out

FYI Bob needed only 1.35 bar peak out of mine to achieve 343 ft lbs torque, which is the same/more than some people with TD05 series turbos achieve!

Ns04

 

VF35 is a good choice. TD05 18g great, but likely to be a box killer, as above.

Never heard of anyone going for late spool to avoid boost on the motorway before.

Would be good to hear more from the OP re what bhp he is after, because as a general rule it's best to go for the smallest turbo that will provide the power level you "crave".

PS - still loving the TD04H !

 

my sti does a silly rev of around 3700 at 70mph, not nice for motorway driving!!!

steve

 

Iv just fitted a td05 18g turbo on my 53 wrx and had it maped by andy f ,it kicks in around 3000 but what a difference to the td04 still getting used to it

 

I went from a td04 to a VF22 and noticed 2 things.
Huge lag more fuel economy on the motorway because I was below the boost point on the VF22 at cruising speed.

I'm just about to change the VF22 for a VF35 to get the boost threshold down to make the car a bit more useable.

 

I should take you for a ride in my type r then!

 

I have owned both (vf35-0516g) and kept the 0516g. By far stronger turbo and made the car feel loads quicker than when using the vf35. The 16g can/does kill boxes if used to its full potential. NS04 got some very good results with the vf35 and spools quicker than the 16g (200/300 rpm) BUT that doesnt make it a quicker car. IMHO

 

^^^^

at what point does your TD05 16g make 1bar in 4th (assuming it's a uk 5sp box) and the peak boost..?

IMHO 300-400rpm earlier spool makes a big difference, especially on the road with a 5sp box..!

Tell me what gear you'd use to exit a 25mph corner at speed..?

 

It is a matter of preference I guess (one chap in the projects section went from a VF35 to 16G and didn't like it; said it was to slow to respond compared to the 35) A lot depends on the supporting mods and mapping. I'm getting more torque out of my VF35 than some get out of their 16G.

For the road, especially where you don't have a high rev limit to play around with i.e non STis, you want the turbo that spools earliest and quickest: doesn't necessarily make it the quickest car if both drivers have the red mist and are in the optimum gear, but low boost threshold and spool makes for a more flexible and drivable car IMHO. At the end of the day, it's the performance figures that will tell the real story.

TD05s are great turbos though, very, very tough and can be made to work very well!

BTW Much as I'd like to claim that my car was unique, my figures are by no means exceptional for a car with my mods; they're on the positive side of the expected margin

Ns04

 

my cars only done 49k if your on about a high miler 00

td05 outta the question now, vf34 or 35 then

 

mines a V4 type r and presume our gearboxs are similar unless youve changed yours. i just site on the slow lane on motorway doing 60 which i think is still around 3000!! prop not too bad with standard exhaust!!!!

steve