Hi all

Just need some technical knowledge as mine is still in 'development'..

53 plate WRX, original plan was:

2.5" decat exhaust with sports cat downpipe
255 fuel pump
3 port boost solenoid
Cosworth panel filter
remap
For a hopeful 260-280bhp however...

I have spent too much time on here (you should all be ashamed of yourselves, infectious modding bug has caught ahold!!)

So in addition to the above I would like to add a VF35 turbo and 550cc pink injectors to hopefully break the 300bhp mark

My questions are:

A) Is the VF35 a good option, if not what would you recommend and roughly what should I expect to pay new or second hand

B) Is the upgraded turbo and pinks all I need or are there other items that would be worth getting?

C) Does anyone know of anyone reputable in the Lowestoft/Surrounding area that would fit all the parts and then remap? (In addition to the performance parts I will also be fitting upgraded handling and brakes all at the same time)

D) What is a realistic figure that can be achieved from the mods listed, I know each car varies but a rough number would be appreciated

E) Which is best advised..panel filter or open cone?

That I think...is everything.

 

Panel filters are best, could stick on an sti intercooler too. Around 320/340 should be about right.

 

You could get your own td04 hybrided also. It would have super quick spool up with no lag at all.

 

Interesting, pricey to do this or cheaper than upgrading to another?

 

Maybe slighyly more to get your own done but you will have the peace of mind that its like new. It will also spool faster than the vf35. Andy forrest hybrids the tdo4s, give him a bell and see how much.

 

A bit of reading is showing the hybrid as being quite good but run out of 'go' just after 300bhp??

 

Not sure AF does the TD04 anymore. Could go TD05 front entry for as little as £70. Laggy Turbo but tough.

Decat up-pipe is a great mod. Up to 10bhp with spool 200rpm earlier.
Silicone intake pipe is also rumoured to give up to 10hp with 200-300rpm earlier spool.
Cooler spark plugs if you haven't already got them.
For a few pence maybe invest in a piece of silicone hose for the actuator to t-piece.

Quick spray of the MAF sensor with brake cleaner! My dirty MAF became evident straight after a map!

 

TD05 or VF35? Excuse my lack of knowledge but what silicone hoses/T pieces do you mean?

Completely forgot about plugs, for the mods intended what would be the better option? I will take everything to whoever I can find to fit/map and leave them to it lol all I want is labour fees so all the info/parts I can get prior would be great

 

I LOVE TD05's... think they are 100x better than VF35, I've had TD05-16G, TD05-18G & VF34, VF35 and the TD05's win hands down for me. such a strong turbo and holds power for longer and gives a better whack in your back. oh and cheaper!

 

Just the few inches of tubing that goes to your actuator nipple, I think whoever fits your 3 port will probably uprate the Turbo vacuum hoses anyway. I think they come in the 3 port kit. It's not a crucial mod but my 11yo standard hose split and caused bad overboost.

AFAIK The more expensive VF35 (around £250 used) will spool up a little faster, but is not as strong or tolerant of compressor stall as the TD05. I've read about cars pushing 400bhp running crazy boost on the TD05.

I believe the VF35 is a far more audible Turbo than the TD05.

Plugs - NGK PFR7B.

You might have to fit a few parts days before and drive steadily before map as it'll take a few man hours to fit them all.

 

How does the standard engine internals, gearbox and clutch hold up with either a VF35 or TD05? All in fine working order at the moment, I know the WRX is weaker than the STI but can it cope??

What characteristics come with the two different turbos i.e. low/high end grunt, etc

cheers for the plug details Matt will get some on order, do they come pre-gapped?

I think I can do a fair bit myself but have heard the up pipe can be a b1tch

 

This is one thing I'm looking for...I do love the feeling of being pinned to your seat, had it when I first bought the WRX but now I have got used to it

 

Not sure about the NKG, mapper just put them in, Up-pipe is a bugger, I took mine to an up-pipe specialist and one of the nuts broke straight off as soon as I pulled onto the main road. They said on here it wasn't a problem and that cars can run fine without the nut in question. My up-pipe has since warped because of the missing bolt and leaks slightly.

VF35 and TD05 shouldn't really trouble the engine, box and clutch unless you're driving silly or develop a related fault. But you'll only be around 30-60bhp off what people call the limits of a WRX.

I think both Turbos will perform similarly on boost with close to identical peak bhp outputs but I wouldn't recommend running a TD05 unless you have a decatted or sports cat set up. Mine was very very laggy until I got the sports cat. Boost comes in strong at 3500 (4500 with standard downpipe!), I suspect a VF35 would come in 500rpm earlier on my car

 

Oh... will have to watch that then when it is fitted!

I'll obviously have spirited drives but won't be tracking the car so hopefully standard parts hold out

I guess I will be fairly happy with either to be honest, would there be much point in selling my TD04? 60k miles on it

 

There is a lot of speculation in matts posts, be careful asking for advice on here...

Ring your local specialist and ask them they have far more experience in these kind of things. As turbo choice is very subjective you need someone with experience of both to advise the pros and cons. Not "suspecting" you will get earlier boost by 500rpm etc as it is just speculation no facts

Ipersonally would always go for a turbo offering better spool up as you will have aa faster point to point car and more driveability. I have a massive turbo on my car. Easily bigger than a td05 etc and it spools up quicker than most cars on here, we are on full boost by 4k, and with the new upgrade I'm hoping full boost by 3.5k so do your research and go from there!

 

Don't ask tuners, specialists or sellers either as they always disagree with one another. Especially Oil sellers! - that's my experience.

Best thing is to just read many posts on many forums to see what the common denominators are.

For example if you ring Subiehospital.co.uk and ask what will be better for spool and 350bhp between the TD05/VF35 etc, they'd recommend their £1200 SH360 Turbo.

 

Or ask random people on a forum who you don't know if they have any experience of the stuff you are asking or not! Who can recommend turbos they have never experienced

Although maybe 2 bar is okay if just over taking a tractor

Everyone has a personal preference and to be honest it is totally subjective so do your own research, discount 99% of people on here andd their opinions as they have never tried both turbos, the clever bit is figuring out the people worth listening to, as there are some very knowledgable people on here.

A mapper/specialist is the best person to talk to as they have mapped and built multiple cars with the same kind of spec you are looking for and can give detailed answers to your questions. I get the answers matt has too, but you need to cut through the sales rubbish and they will be very helpful and give you the answers you need.

Good luck with your quest for more power, it won't be long until you end up with a car like mine at this rate haha!

 

Appreciate all the input. I guess the final thing is..

Will I need anything in addition to the listed mods to achieve 300+

 

If you source a STI TMIC you'll need a silicone hose y-pipe for it as the OE tubing has been known to collapse under raised boost. Chances are it'll be sold with the right pipe though.

TMIC isn't essential for circa 300bhp and I felt no difference when I fitted one but like the Walbro pump it's going to add a little insurance.

TBH I'm hoping to get Billy remapped tomorrow with the following mods;

TD05
STI pinks
Blitz Nurspec cat back
3" Cobra downpipe sports cat
Harvey Smith up-pipe
STI TMIC
JR panel filter
Perrin Turbo intake hose
255l Walbro fuel pump

I'm hoping for 330bhp which will be great to say my compression losses total up to the power of 3 working cylinders!

I've done a 13.3 quarter mile (headwind) before the sports cat and intake so hopefully, after this map I'll be running 12's in my big fat Newage!!!! Clocked a 4.5sec 0-60, I think after the map it should easily push 4.2secs.


I still can't get my terminal over 100mph though, not sure if this is down to my knacked engine or not. My 1/8 times are sensational but then the car just limps the rest of the strip. Long 4th gear!

 

Let me know how you get on Matt be interesting to see your figures

 

12 seconds in a 330 bhp wrx with knackered engine,lol this place is hilarious

 

12 seconds should be easily achievable! I did 11.8 on my push bike the other day.

I'd take a wager you don't get it to the end of the next 1/4 mile lol

 

333bhp 300lbs

Big issues with the previous map showed up after a RR run.

Namely the car was making 299 but at 1 BAR, I'm happy with that but I agreed to 1.6 BAR and got told by the last tuners it was running 1.4 and just under 1.6! Also the car was detting and "running 1 points lean"

Ironic thing is I asked for 1.4 BAR on the TD04 years ago and the mapper said that's what he'd tune for but it came back as 1 BAR on the printouts!!!

Also the restrictor pill was missing in the turbo vac hose, a new pill surprisingly didn't speed up spool once it was installed then mapped but it may have been previously holding the car back from making more than 1 BAR. (Always read or got told that a missing pill would mean you only made manifold pressure circa 0.7psi)

But for me I'm done with engine mods now, tuners have **** on me or lied to me left right and centre. It'll have to be weight saving mods to get me into the 11's!!

 

only way you will get a 330 bhp wrx into the 11s is if you strap it to the front of fireforce at santa pod.

 

What you getting banned for again you bellend?

 

Do you have a 3 port? If so I don't believe you should need a restrictor pill... But correct me if I am wrong skmeone

 

Just the OE 2 port. They did recommend the fitting of a 3 port today before mapping but I said if it spikes on the 2 then we'll go 3. It's bad enough I now owe the long suffering wife £270. Not that money is the restriction, I have an hard-on for overboost after recently experiencing it. F**K THE 3 CYLINDERS!

I don't believe you do need a pill with the 3 port but I have read contradicting install reviews etc.

 

This is getting somewhat beyond me so I will just read with interest