Hi, runnning 279bhp and 304 torque on my 99plate classic with td04 - been given a vf35 turbo - do i put this on or will car suit the td04 better (yes will put new injectors if I get it done)

Advice please - as do not want to ruin the car as runs very well in current set up _ know i will gain 40 odd bhp, but will this make up for the bottom end loss- spool time etc???

 

You won't need new injectors.

I would mostly definitely go with the VF35.

What other mods have you got? Torque seems very high.

 

I think with the nice torque figuire you have and the quick spool of the td04 id stick with it, Unless i was going to upgrade to something bigger than a 35

 

I had both the Vf 28 and Vf 35 on my last classic, a MY 00 UK. The Vf 35 in my opinion is the best turbo with minimal lag and up to 340 Bhp with supporting mods.

 

u will need a better tmic to suit if your going for more bhp as vf35 has better potential. fit a 3port solenoid to

 

VF35 has the potential to finish off your clutch, if it's new-ish or uprated fine, otherwise budget for a replacement...

IMHO

dunx

P.S. A VF35 will be a touch more laggy than a tiny TD04....

 

Good point, My standard clutch started slipping soon after I had the Vf 35 ,Sti 8, intercooler and 3 port boost solenoid fitted and mapped . Budget for a new clutch. I fitted the Excedy stage 1 organic which was fine with even less pedal pressure required than with standard clutch.

 

Thanks for advice so far :-

I have got helix uprated clutch and flywheel - am worried that the box will die and also the standard uk turbo engine will be on it's limit with this turbo on.

Car at present has :-
harvey spec up pipe
ported headers - all wrapped
turbo wrapped
hks full systm and down pipe
ECUTEK remap

the car managed that power today - which i think is really good considering how hot it was.

Are you sure I can keep standard injectors?

 

yes if ur car is a 99-00 uk turbo it has the 440 injectors fitted which are fine for your power or with the vf35 fitted.

 

cheers for that mate - what power can i run on the 440's and the standard engine / gbox before it starts to die!

 

If you have an ounce of mechanical sympathy you'll be fine at 340/320 ish....

But even bug-eyes are having gearbox issues with increasing age and higher mileages...

Sorry.

dunx

 

i managed to get 290 and well over 300 lb/ft of torque from my 1999 uk classic with very similar set-up. It made for a very responsive road car. Harveys Ported headers made a huge difference to torque once they had been mapped on. I had the same thoughts as you and bought a vf35, i was told by Bob Rawle that the 440cc injectors should be ok for 330bhp. However someone crashed into the side of my car last year and wrote if off before i had time to fit the turbo. In hindsight, my worry would be the gearbox. Saying that i now have a 2003 twinscroll Spec C running 353/385 and just had to have the 6 speed box overhauled due to crunch in 4th gear and worn synchro, so even early 6 speed boxes have their akiles heel

Andrew

 

Yes, my early bug-eye box is currently having the sixth gear synchro done, but I'm also getting the bearings swapped just to be sure, as it's done 51,000 miles now.

dunx

 

would the engine and uk box take 330bhp - or am i best sticking with what I have. I want a fast road car - not a track car

 

I have an MY99 with the following mods

Exedy organic clutch
VF35
Sports cat DP, decat rest of system
Ported/wrapped headers
Hybrid FMIC
K&N57i induction kit
Simtek ECU
Walbro fuel pump
550 injectors

It's a very quick and responsive car for the road. Around 340 of each. Completely reliable.

A few observations from experience.

With the bigger turbo, your top mount intercooler will be pushed right to its limits. When I fitted the FMIC to my set up, the car improved noticeably!

The Ecutek std ECU isn't optimal for the MY99 anymore. The std ECU does not have an in gear boost compensation facility (you want this!) It does, however, have a very annoying and potentially dangerous -in my view- boost cut facility, which limits boost to .5 bar under certain throttle conditions to pass emissions legislation nonsense. This can't be mapped out! The MY99 also has a fragile Maf (a potential engine killer). The Simtek does away with this completely. I went from Ecutek, to Ecutek +AVCR to Simtek and the latter is definitely the way to go.

44os would be ok at level of tune (but they will be at their limits) If you want the maximum out of the turbo, you might need to update the fuel pressure reg too, or switch to larger injectors like I did. If you do the latter, then I'd really suggest going with a better ECU to avoid slight lumpiness on small throttle openings

Oh, one more thing, I found that a classic Impreza with 340 was starting to ask stern questions about the car's braking and suspension. Both could cope, but it was obvious that the set up as a whole was not optimal. AP 6 pots sorted the braking (and then some!) and Eibach coilovers sorted the suspension. Unfortunately, that also bumped the price up significantly!

You'll definitely need a new uprated over std clutch and at that level of tune there are no assurances with respect to gearbox longevity!

It's now a fantastic performance car for the road; the VF35 is a cracking turbo, but just be aware that getting everything balanced and working optimally will cost more than just a simple turbo install!

Ns04

 

I assume you have a Walbro GS341, 255 lph fuel pump. If not, get one asap. The original gets tired and doesn't have capacity when you increase power.
Just to put this into perspective, you are at the beginning of a slippery slope. Where does it end?
Without an FPR your yellow 440cc injectors will max out somewhere around 325 bhp, perhaps marginally more so if you have all the other mods this will be a limiting factor. If you get the opportunity to pick up 550cc injectors then that is no longer a limiting factor and your power output will depend on the turbo capability, all supporting mods and your choice of mapper. You will not have the immediate response of the TD04 but the VF35 will give you potential for a good 40 bhp on top and it is not a laggy turbo.
Your engine and gearbox are good for this power no problem providing you drive intelligently. The OE clutch can give up the ghost around this power level but you already have that sorted.
By the early 300 bhp mark your OE top mount is already struggling and you need to give consideration to a front mount which will produce more power because of the lower charge temperatures and add a degree of safety.
To avoid two mapping trips it would be best to fit the VF35 and front mount at the same time.
Hi Guys

 

Harvey - Do you think it would be a good idea to get the vf35? Thr car runs really good at the moment. but for £200 I can have the vf35 fitted and map changed.

Will the car be as drivable on the road? Will the extra power make upo for the loss at the bottom end - and finally how long will the standard engine and gbox last? My car has 74k on it.

 

as long as the car is mapped sympathetically and with safety to the engine in mind and you don't hammer your gear box then 330/330 would be ok. I'm sure Harvey would recommend a FMIC which would give even better performance and a car running under safer temperature perameters.
Boost will kick in slightly lately than the TD04, but thts the price you pay for more power on a turbo charged engine.
Using a specailist mapper with years of experience is also the key. Be willing to travel

One option would be to travel to Darlington where Harvey is and get the turbo and intercooler fitted by him on a weekend when Bob Rawle is visiting. Both charge very reasonable rates and you know you are in the best of hands. You would leave there with a transformed car. Infact i left there a few years back a bit over excited and lost my licence on the way back to Cardiff S.Wales (oops!)

Andrew

 

Wouldn't worry about drivability on the vf35, they're hardly a big laggy turbo in the scheme of things.

I'd go front mount and vf35.

I had a vf35 on my ol my00 turbo and the top mount was deffinately holding back power potential.

 

Whoops! I'm guessing you were "enjoying" the performance hike then

A properly tuned classic in the 330 bhp/lbs ft range is pretty potent isn't it. Sometimes I do wonder how those with 450 bhp/lbs ft monsters manage to exercise enough restraint to keep their licenses.

 

I had a STI 8 top mount ,bonnet scoop and underscoop fitted to my car along with the VF35. If I was to do the job again I would fit a front mount intercooler for future proofing for more power. Also the STI topmount is a very tight fit in the classic.

 

cheers for replys - an now thinking of getting the vf35 fitted this week, due advice on here - thanks all.

 

Yep, it was a long drive back. I remember there was an international rugby match on that day, and Harvey himself said 'be careful on the way back there will be a big police presence on the roads'. Did i listen??

 

don't forget an uprated fuel pump if you haven't done that yet!!

 

Sorry for the delay but I am out the country with limitted access.
In your shoes I would go for the VF35 as the plus from that more than makes up for the slight reduction in response from the smaller turbo. You are also at the point where you will gain from a front mount on your car but you can m ake do with the existing setup for now.

I remember well Andrew!!!

 

cheers Harvey for advice. Sounds mad but I think I am going to stick with what I have - is such a nice car to drive. Am going to keep my money towards the type 25 I want next year.

Just think if I do not stop now then it will be the turbo, then injectors, then front mount - then gearbox, rebuild and new rods etc - I think what you said Harvey about the slippery slope is right - stop while I am ahead!